How to Kickstart and Scale a Marketplace Business – Part 4: Cracking the Chicken-and-Egg Problem 🐣 - Growing Initial Demand (plus a Bonus!)

This is Part 4 of Lenny Rachitsky's marketplace series, focused on driving initial demand after supply is underway. It argues that the timing of investing in demand depends on product-market fit, where growth comes from, and how easily supply is being acquired. Drawing on interviews with leaders from companies like Airbnb, DoorDash, Thumbtack, Etsy, and Uber, the post maps twelve demand-side growth levers, with word of mouth being the most common early driver. It also covers what failed for some companies and stresses that the work of cold-starting a marketplace is scrappy and labor-intensive. The piece closes Phase 1 and sets up the scaling phase that follows.

01Key takeaways

• Measure how much of your growth comes from word of mouth, since it is a strong early signal of product-market fit.
• Shift to demand work when supply is easy to acquire but sits underutilized, and validate that your offering beats alternatives first.
• Build SEO early or prepare to capture it as you grow, since search can become a large and free traffic source.
• Enlist supply to promote itself, for example by giving sellers or restaurants marketing materials and incentives.
• Use scrappy, manual tactics like personal outreach and flyers to validate demand before automating anything.
• Test channels deliberately, because some that worked for one marketplace, like referrals or PR, may fail for yours.

02Key sections

When to shift focus to demand

The author lists signals such as easy supply growth, underutilized supply, and unproven customer value that indicate it is time to prioritize demand. A simple test is whether your offering is cheaper, more convenient, or better than alternatives.

Word of mouth and supply-driven demand

Word of mouth was the top early channel for over half the companies profiled, and supply itself often generated demand through sellers, restaurants, and organizers marketing their listings. Several companies relied on these channels rather than paid acquisition.

SEO, performance marketing, and PR

Search engine optimization drove a large share of growth for many marketplaces, often through creating pages for every listing, while paid search and social ads and press coverage served as additional levers. Examples include Thumbtack, GrubHub, and Zillow.

Loops, referrals, events, and partnerships

Companies built self-reinforcing loops, referral programs, launch events, and brand partnerships to add demand, with some success in each. Direct sales and street teams also appeared, though less often on the demand side.

What didn't work and the value of doing things that don't scale

Some companies found paid growth, referral programs, or PR ineffective in specific contexts, and several stories show founders using manual, unscalable tactics such as printed flyers and door-to-door sales to get started.

03From the post

““We worked with restaurants who didn’t have websites, or had really poor websites, and helped them build a site. We ensured that every restaurant website would implement a booking module that used OpenTable. It introduced the concept of online bookings to consumers, and introduced them specifically to OpenTable. That’s where they landed when they clicked to reserve a table, and even the confirmation email they got was from us — so why not look at OpenTable in the future? This became the 1 driver of customer acquisition, and is even now.” — Mike Xenakis (ex-SVP of Product at OpenTable, Lecturer at Kellogg School of Management) Welcome to part four of our limited series on marketplace growth — a deep dive into early demand growth. A marketplace business, or any business for that matter, is nothing without demand (a.k.a. customers), so I’m very excited to dive into how today’s business marketplace businesses drove their early demand. If you’re new to this series, don’t miss the previous posts in Phase 1: Cracking the chicken-and-egg problem: - Part 1: Constrain the marketplace 🔬…”

04Frameworks mentioned

Summary and takeaways written by PM Atlas; quotes are short excerpts. © the original author.