Archive for June, 2019
28 ways to grow supply in a marketplace — by Lenny Rachitsky, ex-Airbnb

Hi readers,
The growth teams at Uber and Airbnb occasionally met over the years to share best practices, brainstorm ideas, and share observations on the startup world. Iâve had folks over to 1455 Market St, the headquarters of Uber, and Iâve reciprocated with visits to the Airbnb offices too. Iâve learned a ton from these conversations, and met awesome people along the way!
While both consumer marketplaces are very different â one is a city-by-city transportation service, the other a global network of homes â they also share a lot of similarities too: Both were founded within a year of each other, quickly found network effects, made major design innovations that made the consumer experience 10X better, and much more. Importantly, both companies are tremendous growth stories, and have needed to grow both demand but especially supply in all of their markets globally.
Today, I have a wonderful guest essay to share by Lenny Rachitsky (@lennysan) â heâs recently left Airbnb after 7 years, much of his recent years as the product leader on Supply Growth. We’re all lucky that he’s now sharing his wisdom more widely!
This discussion is critical because the supply side â homes/hosts for Airbnb and drivers for Uber â are the most important aspect of most consumer marketplace startups, which Iâve written about this in my previous essay, âWhy Uber for X Startups Failed: The Supply Side is King.â Lenny’s essay below discusses a comprehensive list of tactics and ideas around growing this critical side of the market. Itâs fantastic, and I hope you enjoy it.
Thanks,
Andrew
Twenty Eight Ways to Grow Supply in a Marketplace
By Lenny Rachitsky
Airbnb now seems like an unstoppable juggernaut, but early on it was so fragile that about 30 days of going out and engaging in person with users made the difference between success and failure.
â Paul Graham, founder of YC
Deciding to open your home to strangers is a complex decision. Over the course of the seven years that I spent at Airbnb, my work centered around helping people all over the world make this decision. As the number of homes on Airbnb scaled from around 100,000 in 2012 to over 6 million today, I led teams tackling everything from supply growth, to guest booking conversion, to marketplace quality. As a result of this experience, Iâm often asked what Iâd recommend startups do to grow supply in their marketplace. The truth is that at the root of Airbnbâs success was a very good ideaâââaffordable and unique travel experiences for guests, and great income for hosts. That being said, an idea is nothing without execution.
Below is an overview of every tactic and strategy Iâve seen used to bootstrap and accelerate supply growth, both at Airbnb and other successful marketplaces. Though some of these worked at Airbnb, and some didnât, every marketplace has different challengesâââmy advice is to pick a few tactics that resonate, experiment with them, learn, and adjust.

Tactic #1: Nail the value prop on your site/app 👌
Understanding the context and expectations of your audience is vital to engaging them. At Airbnb we tailored the value props all the way from ad creative to landing pages.
â Dan Hill, ex-Airbnb Growth Lead, CEO of Alma
What: You need to convince visitors why they should become âhostsâ on your platform when they visit your site (and then deliver on that promise). This may be obvious, but this is a foundational piece that enhances every other tactic below. Itâs especially impactful for marketplaces that primarily grow organically because youâll end up converting a significantly larger portion of your traffic.
Stage:Â Start on day 1, and continue iterating
Cost:Â Small
Impact on Airbnb supply growth:Â X-Large
Examples:
At Airbnb, the earnings estimate was an order of magnitude more effective than any other value prop. Any time we hid or obscured it, growth dipped. However, itâs critical that this estimate is realistic, both for legal reasons and to set the right expectations for your users.


Tips:
- Take your best shot at the pitch at first, and keep iterating as you learn more about your users.
- Help the user understand how they would benefit from hosting with you, and address all of their concerns. In most cases, itâs primarily going to be about the income they can make.
- Deliver on the promise. Or at least get close. This will lead to word-of-mouth growth, which is key.
Question: What has worked when pitching your existing âhostsâ? Make sure your site/app says the same thing boldly and directly.
Tactic #2: Add entry points to the value prop 👉
What:Â Drive your site visitors towards your âhostâ pitch. This includes call-outs in the top level nav, in the footer of every screen, and sprinkled throughout the user experience. Do not assume your visitors know this exists, or why they should ever consider it.
Stage:Â Start on day 1, and continue iterating
Cost:Â Small
Impact on Airbnb supply growth:Â Large
Examples:


Tips:
- Itâs hard to have too many entry points into your âhostâ pitch. Users will ignore it if it doesnât apply to them. Resist the urge to be shy about this, especially if you are supply constrained.
- Every time your user has a good experience, encourage them to become a âhostâ, to provide this experience to others (while making money).
- Be more aggressive with this than youâre comfortable.
Question: Where else can you include a call-out to consider becoming a âhostâ?
Tactic #3: Offer a referrals program 👭
If your product requires word-of-mouth to convince most people to start using it, you can engineer more growth by building an incentivized referrals program. The incentive will be fuel that pushes people over the edge to tell their friends about something they love using
â Gustaf Alströmer, ex-Airbnb Growth Lead, Partner at YC
What: Incentivize word-of-mouth by paying existing members for every new member they refer to the platform.
Stage: Start early with a scrappy version, and get smarter over time
Cost: Medium
Impact on Airbnb supply growth: Large
Examples:
At Airbnb, the host referral program became the single most efficient and effective growth lever for consumer supply, cost efficiently driving both the largest share of attributable supply AND the highest quality supply


Tips:
- If most of your supply growth is coming from word-of-mouth, and especially if your users have large social graphs, then a referrals program is going to be huge for you.
- Once you have this, donât hide it. Promote it throughout the user experience.
- Once you reach scale, fraud becomes a real issue. Watch for it as you grow, and invest in addressing it.
Question: Whatâs the simplest way you can test a referrals offering?
Tactic #4: Run direct sales ☎️
After calling and activating 100 listings in a market, we then drove demand there to see what converted. We then called these hosts to help them convert their requests into bookings. This was all manual, but super effective, all the while we were getting direct market feedback.
â Georg Bauser, ex-International Expansion at Airbnb
What: Call, email, or go door-to-door to pitch potential âhostsâ on joining your platform. Sometimes this includes convincing them to switch from a different platform, sometimes it includes teaching them how to do it in the first place. This tactic is one of the more complex and operationally heavy, but also often the most effective at bootstrapping a marketplace.
Stage: Early-stage for B2C, an evergreen lever for B2B
Cost: Medium
Impact on Airbnb supply growth: Medium-Large
Examples:
- Lyft: https://www.saastr.com/build-sales-team-1-100-video-transcript/
- DoorDash: https://medium.com/@DoorDash/doordashs-inside-sales-team-is-driving-the-growth-of-key-merchant-relationships-b1f926819426
Tips:
- Hand-hold your early members. Help each new early member becomes successful in order to seed the platform with the type of supply you want. As a bonus, these early hosts will become loyal and unlikely to switch to a competitor, because you are building the business together.
- This tactic is particularly effective if your supply is un-commoditized and has high LTV, and if youâre creating a new market or behavior.
- Be creative in how you figure out contact information.
Question: Whatâs stopping you from cold-calling potential âhostsâ today?
Tactic #5: Piggy-back off of existing networks 🔌
Initially, the Etsy team were freelance web designers and one of their clients was a craft forum called getcrafty.com. Throughout the redesign process, the Etsy team interacted with the websiteâs 10,000 users to best understand their needs. They began to notice that there was a large number of users who were looking for a platform to sell their handmade wares. While they were building Etsy, they also found out about Crafster.org, this time a message board with 100,000 users and were able to tap into another willing market. We extended an accommodating bridge to a preexisting online community, and they jumped aboard happily.
â Chris Maguire, co-founder of Etsy
What: Go to the place your existing supply is distributed and convince them to switch.
Stage: Early-stage
Cost: Small
Impact on Airbnb supply growth: Large
Examples:
- Airbnb: https://davegooden.com/2011/05/how-airbnb-became-a-billion-dollar-company/
- Omni: https://www.reforge.com/blog/omni-bootstrapped-marketplace-liquidity-growth
- General: https://platformed.info/whatsapp-instagram-marketing/
Tips:
- To be successful here, youâll have to be âcreativeâ in how you do said piggy-backing. Airbnb piggy-backed off of Craigslist for both supply and demand.
- Make it super easy to switch from them to you.
- You will only win if you can drive more demand or profit to that same supply. Otherwise, why would they choose you?
Question: Where do people currently find what you are offering, and is there a way you can piggy-back off of that channel?
Tactic #6: Hold meetups 👋
To launch a city, weâd travel there and hold a meetup. Here in San Francisco, itâs not a big deal to meet a founder. In other places, thatâs pretty novel. They would get so excited that they met us that theyâd tell their friends. The markets started turning on, and we religiously focused on making sure customers loved us.
â Brian Chesky, CEO of Airbnb
What: Bring âhostsâ and anyone considering become a host together in person. This can be small intimate gatherings or largeâish events.
Stage: Early-stage
Cost: Small
Impact on Airbnb supply growth: Medium early-stage, Small late-stage
Example:
- Read the first part of this interview with Reid and Brian.
- Lessons in Building Movements through Community Action from Douglas Atkin, Global Director of Community at Airbnb

Tips:
- The highest value of the meetups is for employees to listen to users, to answer questions, and simply to give people a chance to meet and share. Resist the urge to fill the time with presentations and speeches.
- You donât need to spend a bunch of money on each meetup. They can be scrappy and simple.
- Donât expect to be able to quantify the impact of hosting meetups. We tried this many times and we never saw any measurable impact. But, looking back, itâs clear that it was important early on.
Question: Where is your early community most concentrated? Why arenât you there right now?
Tactic #7: Leverage events and PR 🎪
In the early days we targeted a lot of events: the DNC, the Presidential Inauguration, music festivals, the World Cup, Olympics, etc. Events and PR were the main way we bootstrapped the network in the early days.
â Brian Chesky, CEO of Airbnb
What: Leverage a specific event to pitch potential âhostsâ and seed PR stories about how your service is helping people.
Stage: Early-stage
Cost: Small
Impact on Airbnb supply growth: Medium
Examples:

- Airbnb: https://www.theguardian.com/travel/2015/may/18/airbnb-float-a-house-on-the-thames-in-london
- Uber: https://www.annexcloud.com/blog/ubers-marketing-strategy-in-7-steps-revisited/
- TaskRabbit: https://www.networkworld.com/article/2223168/-1-500-to-be-first-in-line-for-an-iphone——or-a-publicity-stunt-.html
Tips:
- Find ways to be creative and stand out during the event.
- Use that same creativity to develop PR pitches. What would give the press an interesting angle on the event?
- Get on the ground. You need to be there, hustling.
Question: Are there punctuating moments where your offering is most beneficial for your supply?
Tactic #8: Run performance marketing 💰
Performance marketing is about reaching people where they are, inspiring them to take action and doing so cost effectively. You quickly learn that itâs a unique blend of art and science, and we were most effective at scaling this powerful lever when we had a dedicated cross-functional team sitting togetherâââproduct, marketing, engineering, data science, design, content, and finance.
â Fatima Husain, ex-Airbnb host paid growth lead, Principal at Comcast Ventures
What: Run Facebook, Google, Twitter, etc. ads.
Stage: Early-stage for some businesses, late-stage for others
Cost: Medium/Large
Impact on Airbnb supply growth: Medium
Examples:


Tips:
- Knowing your supply LTV is key, so that you know how much you can spend.
- You can figure out the basics yourself, but try to hire people that have done this before.
- This lever works, but can easily become addicting.
Question: Where do your potential âhostsâ spend time online?
Tactic #9: Convert demand to supply 🙃
Converting travelers to hosts definitely moved the needle when we launched a new market. Plus, these new hosts were the most empathetic as they remembered the guestâs needs.
â Kati Schmidt, ex-Head of B.D., Airbnb Germany
What: Convince users to become âhostsâ on the platform. This builds on Tactic #2âââgo deeper into the user experience and find moments when it makes sense to pitch âhostingâ (e.g. after a great experience).
Stage: Start early, and continue iterating
Cost: Small
Impact on Airbnb supply growth: Medium early-on, Small later-stage
Examples:

Tips:
- This can be manual/ops based at first, and productized over time.
- Think about a clever pitch you can make to your users, e.g. âPay for your trip by hosting your homeâ.
- See how Uber, Lyft, and Airbnb do this throughout the demand-side experience.
Question: What percentage of your demand could potentially be the supply? If itâs in double digits, see if you can suggest or even incentivize this behavior.
Tactic #10: Invest in SEO ⛓
What: Drive organic search traffic to your site.
Stage: Early for some businesses, late-stage for others
Cost: Small
Impact on Airbnb supply growth: Small
Tips:
- SEO is generally more effective for demand. I havenât seen SEO be a major driver of growth on the supply side, including at Airbnb.
- The best SEO content is user-generated-content that is created as a part of the user experience.
- Find an SEO expert to help you figure this out.
Question: What job are you solving for potential âhostsâ, and what does that translate to when they search for solutions?
Tactic #11: Acquire supply 🤑
We needed to move fast and acquiring companies with inventory in these competitive markets provided an immediate benefit. Often times the expense of the acquiring the company that had the inventory was cheaper than the cost to go about acquisition in an organic way. The key is to understand the migration percentage that would come through. We aimed for 60â80% to migrate over.
â Jonathan Golden, first PM at Airbnb, partner at NEA
What: Acquire companies that currently have the supply you want.
Stage: Always
Cost: Large (but strategic)
Impact on Airbnb supply growth: Small globally, Large in key markets
Examples:
- Airbnb: Crashpadder, Statthotel
- Rover: DogBuddy, DogVacay
- Eventbrite: Ticketfly, Picatic
Tips:
- Since you are betting on network effects, the value of that supply to your network should be much higher to you than to a small local company. Thus, it may be worth paying a premium.
- Make sure the supply you are buying is actually good.
- Donât underestimate the work itâll take to migrate the supply, both technically and interpersonally.
Question: Are there small players with a strategic foothold you can acquire or merge with?
Tactic #12: Partner with supply aggregators 👋
What: Plug-in a partnerâs supply into your marketplace, through partnerships, licensing, or even scraping.
Stage: Always
Cost: Small
Impact on Airbnb supply growth: Small
Examples:
- GrubHub: https://table.skift.com/2018/05/01/grubhubs-aggressive-growth-fueled-by-chain-partnerships/
- DoorDash: https://medium.com/@DoorDash/the-doordash-outside-sales-team-builds-partnerships-and-empathy-with-business-owners-across-the-3fbdf1f0723b
Tips:
- Be strategic and thoughtful about the type and quality of supply you bring on. The quality and experience with that supply will reflect directly on your brand, not theirs.
- Make sure you are clear on your long-term competitive advantage, and not only growing this partnerâs business. Whatâs your differentiator, and how will you maintain it?
- Make sure the user experience is smooth and feels native.
Question: What would be the biggest upside of adding 3rd party supply to your marketplace?
Tactic #13: Build your own supply 💪
One of the smartest things we did in the early days of Udemy was produce our own courses. Production (i.e. filming & editing video content) is a huge friction point in our supply-side process. So, we produced a few of our own courses in the beginning and then marketed the heck out of them. This wasnât scalable, but it did allow us to build powerful social proof points which were critical to our long-term success.
â Dinesh Thiru, VP of Marketing at Udemy
What: In some marketplaces, you can either bootstrap supply by creating it yourself (e.g. videos), pay early users to become supply (e.g. Uber/Lyft paying drivers a salary), or your build your entire business on your own supply (e.g. Sonder).
Stage: Depends on business
Cost: Medium/Large
Impact on Airbnb supply growth: Small
Examples:
- At Airbnb, read Brian Cheskyâs answer to the first question in this interview. His and Joeâs apartment was the first unit of supply on Airbnb.
- See example #1 in this post about Udemy.
Tips:
- Set the norms through the type of supply you create.
- Often not possible due to the business model.
- Be careful about the legal implications.
Question: What would it cost to build your own supply, and how does that compare to customer acquisition costs?
Tactic #14: Run broadcast and out-of-home ads 📺
What: TV commercials, podcast ads, movie ads, etc.
Stage: Always
Cost: X-Large
Impact on Airbnb supply growth: Small
Examples:


Tips:
- Donât expect to ever be able to measure the impact. Because you wonât.
- The main benefit is generally brand-building.
- Do something unique and noteworthy.
Question: Are your potential âhostsâ watching the same (ideally not super-popular) media or passing through the same physical parts of town?
Tactic #15: Run affiliate marketing 📝
What: Incentivize content producers to send you traffic by paying them for every member they refer.
Stage: Mid/Late
Cost: Small/Medium
Impact on Airbnb supply growth: Small
Examples:


Tips:
- Takes very few people to operate, should pay for itself from day 1.
- There are companies out there that do a lot of the heavy lifting for you.
- Make sure to have brand guidelines that content creators must follow, otherwise the content ends up being bad.
Question: Are your competitors doing affiliate marketing?
Tactic #16: Send direct mail 📬
What: Send potential âhostsâ physical mail, pitching them on your platform.
Stage: Always
Cost: Medium
Impact on Airbnb supply growth: Small
Example:

- Uber: https://www.linkedin.com/pulse/ubers-print-marketing-so-crazy-seth-engel/
- GrubHub: https://blog.sendwithscout.com/grubhub-knows-how-to-design-a-postcard/
Tips:
- This is an under-appreciated channel.
- Tricky to measure, but possible.
- Check out Lob to make this super easy.
Question: Is this a channel your competition hasnât tried yet?
Tactic #17: Optimize conversion 📈
All conversion optimization should start with user research. The biggest gains in optimization donât come from brute-force A/B tests, but from trying to understand the real barriers to people using your product. For example, early at Airbnb we realized that the biggest hurdle for new hosts was knowing how much to charge for their space. So we built price guideance into the flow.
â Dan Hill, ex-Airbnb Growth Lead, CEO of Alma
What: Improving the percentage of people that start publishing that actually finish it.
Stage: Start early, and continue iterating
Cost: Small
Impact on Airbnb supply growth: Medium
Tips:
- Top-of-funnel levers will generally be orders-of-magnitude higher impact than any mid-funnel levers like this one, but early on are often low-risk big-wins. Later-stage, you can continue to squeeze % pointâs of growth for a while.
- Figure out which part of the conversion funnel is the biggest issue, and focus all of your efforts there. Be careful spreading yourself too thinly across the entire funnel.
- In my experience, a big redesign of the flow often ends up hurting conversion.
Question: Which part of the funnel is most important to improve, and what are three things you do to improve this?
Tactic #18: Send re-engagement emails/pushes 📩
What: Emailing users that didnât complete publishing, encouraging them to finish.
Stage: Always
Cost: Small
Impact on Airbnb supply growth: Small/Medium
Tips:
- Youâll get most of the win by simply having an email, and then quickly hit diminishing returns once optimizing it a few times.
- Donât be afraid to send a few reminders.
- Make the CTA extremely clear.
Question: Whatâs one helpful thing you can suggest to bounced users to re-inspire them?
Tactic #19: Make re-engagement calls 📞
What: Calling users that didnât complete publishing, encouraging them to finish.
Stage: Early-stage for B2C, an evergreen lever for B2B
Cost: Medium
Impact on Airbnb supply growth: Small
Tips:
- Always ask users why they didnât finish the processâââthis should inform your roadmap and processes.
- Early on you can use this as a customer development opportunity.
- Long-term, measure the ROI to make sure itâs worth the time.
Question: Which bounced users appear to be the most valuable and worth a call?
Tactic #20: Optimize activation
When I think about the ROI of things that you can do in a business, make certain that your customer is safely handed from acquisition to the activation. Make certain that they are activated and you have done everything in your power in order to make certain they have found their âAhaâ moment and they have began habit forming.
â Shaun Clowes, CPO at Metromile
What: Getting new users to a key milestone that you believe is important for long-term retention. This is sometimes called the âahaâ moment.
Stage: Early/Mid-stage
Cost: Small
Impact on Airbnb supply growth: Small/Medium
Examples:
- At Airbnb, an activation was getting a new listing to its first booking within the first month.
- At Uber, an activation was completing the first ride.
- Inside the 6 Hypotheses that Doubled Patreonâs Activation Success
Tips:
- First, you need to figure out what milestone is key to a new âhostsâ long-term success. Itâs rarely an exact science.
- Goal your supply teams on reaching this point, vs. simply when they go live.
- Adjust this milestone if you learn something new down the road.
Question: Whatâs the one most impactful thing a âhostâ can do to improve their chances of getting booked?
Tactic #21: Optimize retention 🔐
Retention is the core of your growth model and influences every other input to your model. This is important because if you improve retention, youâll also improve the rest of your funnel.
â Brian Balfour, Founder/CEO of Reforge
What: Increasing the percentage of new users that stick around for at least X months.
Stage: Always
Cost: Small
Impact on Airbnb supply growth: Medium early-stage, Small late-stage
Examples:
- At Airbnb, we didnât spend a lot of time focused directly on retention. When we did, the majority of our efforts centered around helping new hosts get booked and have a great first stay.
- Excellent retention reading over at Reforge, including Why Retention Is The Silent Killer and Retention is Hard, and Getting HarderâââHereâs Why.
- Retention metrics roundup of articles and links by Andrew Chen.
- Casey Winters on how to create long-term growth
Tips:
- In my experience, itâs difficult to significantly impact retention head-on. The key is that your product/service needs to continue to be genuinely useful. Make it more useful and retention will grow.
- Track retention by cohort, vs. globally.
- Make sure to capture data on why people leave, to inform future work.
Question: What is the single most common theme in why âhostsâ leave, and what can you do about it?
Tactic #22: Expand existing supply 🤲
What: Convince existing successful âhostsâ to increase the number of units they offer.
Stage: Always
Cost: Small
Impact on Airbnb supply growth: Small
Examples:
- An Airbnb host buying additional properties to manage.
- A Hipcamp host adding additional campsites.
- An Outschool teacher offering additional classes.
Tips:
- This can be one of the biggest growth drivers for certain businesses, donât underestimate the potential here.
- In some cases, this is going to be easy (e.g. online classes), in some very hard (e.g. homes).
- Educate users on what kind of new supply would be most successful. Channel their excitement and point them in the right direction.
Question: Have you actually talked to your successful âhostsâ about adding additional supply?
Strategy #1: Increase benefits, reduce costs ⚖️
What: Potential âhostsâ will do mental calculus when considering signing up: is the cost (e.g. work, risk) worth the benefits (e.g. money, status). Make a list of ways to increase the benefits and reduce the costs, do them, and share this clearly.
Stage: Start on day 1, and continue iterating
Examples:
- AirbnbâââReduce costs: Host Guarantee, free photography
- AirbnbâââIncrease benefits: Guaranteed revenue, online payments
- UberâââReduce costs: Car leasing, guaranteed income
- UberâââIncrease benefits: Choose when to get paid, flexible hours
Tips:
Building it wonât be enough, make sure to make it clear what you do for your users to increase benefits and reduce cost.
Strategy #2: Single-player mode
OpenTable sold software to restaurants that created value for them without requiring any diners on the âbuyerâ side of the marketplace. They built a unique table management and CRM product (the âElectronic Reservation Bookâ) and charged a subscription fee for the service. The initial benefit to restaurant customers was the software. Once OpenTable acquired hundreds of restaurants in a city, they started to have a compelling diner value proposition.
â Eli Chait, ex-Director of PM at OpenTable
What: Make the platform to âhostsâ useful even when there is no demand.
Stage: Early-stage
Examples:
- OpenTable: Simplified reservation management for restaurants
- Eventbrite: Created free web pages for your event
- More: https://blog.elichait.com/2018/04/09/how-the-100-largest-marketplaces-solve-the-chicken-and-egg-problem/
Tips:
- In most marketplaces, supply is king, so your single-player-mode should generally be focused on the supply side.
- This wonât be possible for every marketplace.
Strategy #3: Get to critical mass 💥
Our co-founder Nate Blecharczyk is highly quantitative and had determined that 300 listings, with 100 reviewed listings, was the magic number to see growth take off in a market. Observing New York, Paris, and a few other top markets, we saw a step-function change in the rate of bookings growth at 300 listings, the point at which guests had enough options to find a listing that matched their tastes and their travel dates.
â Jonathan Golden, first PM at Airbnb, partner at NEA
What: There is a point at which you have enough supply that you see an inflection point in demand conversionâââestimate it and get your supply to that number.
Stage: Early-stage
Examples
- Airbnb: https://medium.com/@jgolden/lessons-learned-scaling-airbnb-100x-b862364fb3a7
- Airbnb and others: https://medium.com/immutable/network-effects-1b975c7a6859
- Facebook: https://medium.com/geckoboard-under-the-hood/how-facebooks-7-friends-in-10-days-got-everyone-confused-about-correlation-and-causation-25da4bb8220e
Tips:
- Donât overthink it. Figure out a milestone enough people believe within the org, and use it until you can figure out something better. Itâs more important to have something good-enough than to have nothing.
Strategy #4: Bootstrap trust 🤝
We looked at peopleâs willingness to trust someone, based on how similar they are in age, location, and geography. The research showed, not surprisingly, we prefer people who are like us. The more different somebody is, the less we trust them. Thatâs a natural social bias. Whatâs interesting is what happens when we add reputation to the mixâââin our case with reviews. When you have less than three reviews, nothing changes. But if youâve got more than ten, everything changes. High reputation beats high similarity. The right design can actually help us overcome one of our most deeply rooted biases.
â Joe Gebbia, Co-Founder of Airbnb and CPO
What: At first all you have is new supply, but users have no reason to trust it. Give them reasons to trust.
Stage: Early-stage
Examples:
Airbnb: Early employees were given credit to travel for free as long as they left reviews for new hosts.
Airbnb: Make the supply look great, e.g. free photography, structured data with limited customization.
Airbnb: Reduce risk, e.g. Handle payments online, Host Guarantee, 24/7 support.
Uber and Airbnb: https://firstround.com/review/How-Modern-Marketplaces-Like-Uber-Airbnb-Build-Trust-to-Hit-Liquidity/
Strategy #5: Internationalization ⛩
Internationalization is a challenge and risky. But tech companies need to be global to win. Itâs about the right strategy and answering the right questions at the right time. Not going international is a wasted growth opportunity.
â Georg Bauser, ex-International Expansion at Airbnb
What: Make your site and experience work outside of initial native language/culture. This includes building out translations, local payment types, customer support in those languages, and often people on the ground getting things rolling.
Stage: Mid-stage
Examples:
- Launching airbnb.jp in record time
- Who did what in international expansion in 2018
- How Netflix Expanded to 190 Countries in 7 Years
Tips:
- International expansion is often one of the major inflection points for growth accelerating, so time it wisely.
- Pick the markets you want to win and go big there, vs. going broad immediately. Itâs hard enough to win one market.
- This often requires doing things that donât scale at first.
Strategy #6: Segment supply 👩🌾 👩✈️👩🔬
Early on Airbnb presented only one image of itself to hosts. Many types of hosts deemed the platform unsuitable, but opening ourselves and marketing to business travel hosts and luxury home hosts gave those hosts a message they wanted to hear. They could host the types of guest they felt were suitable for their property. This allowed us to onboard inventory we previously couldnât, and gave existing hosts more optionality in how they marketed to and serviced those guests.
â Marc McCabe, ex-Head of Airbnb for Business
What: Determine what categories of supply you have and/or want, and dedicate teams to growing that type of supply. Generally, different categories require very different tactics, skills sets, and operating cadences.
Stage: Mid/Late-stage
Examples:
- Airbnb: Private homes, vacation rentals, luxury home.
- Uber: Black cars, individual car owner, scooter.
- eBay: Individual sellers, brick and mortar stores, wholesalers.
Tips:
- When introducing a new class of supply, there are many important considerations, including making sure you have a team whose ass is on the line for making this supply successful, making sure the demand side is set up to convert this new supply well, and avoiding overly diluting your marketplace differentiation.
- New segments often appear organically, and itâs up to you to decide if (and when) you want to double down on segment, or squash it.
- For the more professional segments, youâll likely need to build advanced tools and integrations in order to fit into their existing workflows.
Final thoughts
Looking back at my time at Airbnb, a few things become clear. One, there were no silver bulletsâââsuccess came from many wins building on each other. Two, most things we tried didnât have an impactâââbut enough did. Three, it all only made sense in hindsight. My advice to you as you navigate scaling your marketplace is above all else, stay focused on providing value to your users. Their success will make or break you. Beyond that, avoid spreading your team too thinly across many tactics (aka focus), double down on the things that show promise (aka focus), and never lose sight of your north star (aka focus). Also, focus.
For more writings about growth, product, management, and related topics, make sure to subscribe to my new newsletter and hit me up on twitter.
Sincerely,
Lenny
Thank you Gustaf Alströmer, Andrew Chen, Jonathan Golden, Fatima Husain, Marc McCabe, Dan Hill, Kati Schmidt, and Georg Bauser for reviewing early drafts of this post and contributing great ideas. 🙏
Why startups are hard — the math of venture capital returns tells the story

Dear readers,
Iâm happy to announce Iâve completed my first year in my new role at a16z, and itâs been a blast! I will write more about it coming up, but in the meantime, itâs very timely that my colleague Scott Kupor has written a new book, Secrets of Sand Hill Road, with the fun subtitle âVenture capital and how to get it.â Iâve had the pleasure of reading ahead of its release, and as expected, itâs excellent, and provides a detailed guide and fantastic in depth info on everything youâd want to know about venture capital. As an author, Scott could not have more street cred â he joined and built a16z from the very early years, and is our go-to on all the nitty gritty of the industry for the whole team.
You can (and should!) pre-order the book here »
Thereâs a bunch of great topics, including:
- Why the skill you need most when raising venture capital is the ability to tell a compelling story.
- What to do when VCs get too entangled in the day-to-day operations of the business.
- Why you need to build relationships with potential acquirers long before you decide to sell.
- Why most VCs typically invest in only one startup in a given business category.Â
The math of startups and venture capital
Of all the topics of the book, one of my favorites has to be the math of startups and venture capital, because it gives us a perspective on the life and death of startups as a whole. Because venture capital is an index of the broader startup ecosystem, it can tell us a lot â everything from how often the Ubers, Dropboxes, Facebooks, and Googles emerge as startups, to how quickly doomed startups typically fail.
All of these tell you why many venture capitalists ultimately end up being interested in companies that want (and can!) get big â and itâs not the right way to finance the vast majority of new companies, many of whom are more focused on smaller markets or slower growth business models. I want to share a couple slides that Benedict Evans from a16z presented a few years back to make this point:

The above tells an amazing story: Over the past few decades, a small number of startups â 6% â end up driving 60% of the returns.
And I suspect if we were to dig into the 6%, we see that just a small number, probably a dozen or so per year, that drive a substantial amount. In other words, the startups that end up big end up really big. These startups aren’t just unicorns, they are another order of magnitude more successful than that.
It also tells you why, as an entrepreneur, that investors are so focused on network effects, high margins, technology differentiation, a 10X product experience, etc. â these are the foundational drivers that help create this super huge outcomes.

Above: Here’s another surprise from the data, which is that the best investors don’t seem to be better at avoiding startups that fail. It’s not about the downside. Instead, the data says that a âgoodâ 2-3x fund and a fantastic >5x fund lose money about the same % of the time.
However, for a fantastic fund, its winners are much, much bigger than everyone elseâs. For these top funds, the biggest startups end up generating 90% of the returns. It’s all about upside! For startups that ask why investors seem so obsessed with market size and say that few ideas are big enough, here’s the data that explains why.
The J-Curve
Finally, there is the concept of the J-curve in venture capital investing in which you look at a basket of startups over a long period â say, 10 years â and see how the returns look. And it often resembles a J, where the early years look pretty bad! And then eventually the big winners get bigger and bigger, picking up momentum to ultimately drive returns for the fund.
It looks like this:

This graph demonstrates the phrase that “lemons ripen early” — as Secrets of Sand Hill Road discusses. A portfolio of startups will often have early losses as the teams without product/market fit run out of money early. The successful ones that will become the winners take time to emerge. These days, it can take 3-5+ years from the company’s inception to see its true growth trajectory. As a result, there’s a J-curve that shows early losses followed by the successful startups making up the different in the later years.
If you are as fascinated as I am about all of this, I know you’ll enjoy Scott’s book. I want to leave you with an excerpt below. In the section, he discusses the J-curve in detail and why it behaves why it does. Hope you enjoy it!
Thanks for reading, and more from me soon.
Andrew
Secrets of Sand Hill Road: Venture Capital and How to Get It
by Scott Kupor
âCarried Interestâ
The heart of compensation for GPs (at least for those who are successful investors) is carried interest. Itâs rumored that the term âcarried interestâ derives from medieval traders who carried cargo on their ships that belonged to others. As financial compensation for the journey, the traders were entitled to 20 percent of the profits on the cargo. That sounds very civilized, if not rich. Iâve also heardâalthough my Google search is failing me nowâthat the carry portion of carried interest referred to the fact that the traders were allowed to keep as profit whatever portion of the cargo they could literally âcarryâ off the ship of their own volition. I prefer that story.
Regardless of its historical origins, carried interest in the VC context refers to the portion of the profits that the GP generates on her investments and that she is entitled to keep. As with the management fee, the actual amount of carried interest varies among venture funds but often ranges between 20 and 30 percent of the profits.
As it turns out, how we define âprofitsâ and how and when the GP decides to distribute those profits to herself and her LPs is a matter for negotiation in the LPA.
Letâs use a simple example to illustrate.
Go back to that $100 million venture fund we talked about before, and assume that we are in year three of the fundâs existence. The GP invested $10 million in a portfolio company earlier in the fundâs life, and now the company is sold for $60 million. So, on paper at least, the GP has generated a tidy profit of $50 million for that investment. Sheâs also invested the rest of the $90 million in other companies, but none of those has yet been sold or gone public. Ah, she can taste the carry check already!
But how does the money get divvied up between the LPs and the GP? Letâs assume that the GP has a 20 percent carried interest; in simple terms that means that when the fund earns a profit, 20 percent of that goes to the GP.
So, in our example, the GP is sitting on a $60 million check, of which $50 million represents profit, and wants to give 80 percent of the profit (or $40 million) to the fundâs LPs and keep 20 percent (or $10 million) for herself. The other $10 million in this example will go back to the LPs as a return of their original capital. Weâll come back to this later in this chapter and add some additional complexity to this.
But wait a second. Is there really a profit on which the GP is entitled to take her 20 percent? The answer is maybe. We need to take a little detour to introduce two other important concepts before we can conclusively answer the question.
As with fine wine, VC funds should get better with age. In fact, thatâs why people in the industry refer to funds by their âvintage yearâ (or birth year), just as winemakers date mark their wines based on the year of the grape harvest.
As we discussed earlier, in the early years of a fund, VCs are calling capital from LPs and investing that capital in companies. This is a decidedly negative cash flow motionâmoney is going out with (likely) no near-term prospect of money coming in. Thatâs an expected effect, but eventually a VC must harvest some of those investments in the form of those companies going public or being sold.
The effect of calling capital from LPs in the early years coupled with the long gestation cycles for companies to grow and ultimately exitâin many cases it takes ten or more years for companies to be sold or go publicâcreates what is known as the âJ curve.â

As you see in the above picture, the LP has negative cash flow (from the capital itâs giving to the venture firm for investment) in the early years of a fund and (hopefully) positive cash flow in the later years of the fund, a combination both of the capital having already been called and invested and the portfolio companies being sold or going public.
Venture capital is truly a long-term game. But, as explained in our discussion of the Yale endowment in chapter 4, cash does eventually need to come out the other end. Successful GPs will manage their portfolios to drive to this outcome, which can affect how they interact with entrepreneurs on this topic.
One phrase you often hear in the hallowed halls of VC firms is âlemons ripen early.â That is, the non-performing companies tend to manifest themselves close in time to the initial investment. Interestingly, this exacerbates the J-curve problem in that not only are VCs investing cash in the early years of a fund, but the non-performing assets are certainly not helping the GP return money to the LPs.
Reprinted with permission of Portfolio Books