Jan 24, 2023 · 37m · news
The Ultimate Guide for Building a Two-Sided Marketplace | a16z's Jeff Jordan · 20VC with Harry Stebbings
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gold bands on the timeline = statements, start to end. Hover to read, click to jump. CC turns on captions
In this deep-dive interview, venture capitalist Jeff Jordan shares fundamental strategies for building, scaling, and defending two-sided marketplaces, emphasizing supply-side fragmentation, capital efficiency, and organic customer acquisition over expensive paid channels.
How this conversation actually went
Every chapter scored 0–10 on four independent dynamics. Hover any point for the reasoning behind the score. Harry holds 27.5% of the talking time here. How this is scored →
Harry as informed peer 5.3 Guest teaching 4.5 Guest disagreement 2.0 Harry pushing back 3.9
speaking balance: gold is Harry, purple is the guest (3 minute bins)
Sharpest disagreement ▶ 12:25 Jeff Rejects Capital Inefficiency Premise
Jeff explicitly rejects Harry's broad statement that marketplace businesses lack capital efficiency, stating 'Disagree' and presenting immediate counterexamples.
Hardest push from Harry ▶ 11:57 Harry Challenges Marketplace Capital EfficiencyHarry directly challenges Jeff by claiming almost all marketplace businesses are capital inefficient and predicting 97% of Uber capital will fail to return 1x.
Biggest teaching moment ▶ 12:25 Jeff Schools Harry on Cashflow Positive MarketplacesJeff reframes marketplace unit economics by demonstrating how negative working capital in businesses like Airbnb and Incredible Health allows companies to reach profitability before raising series B rounds.
Harry holds his own ▶ 35:10 Harry Rejects Getting Cute with ChannelsHarry firmly counters VC advice on early acquisition diversification, asserting that founders should focus entirely on working core channels rather than splitting focus.
the scores for every segment, with the reasoning behind each
| Chapter | Topic | Harry as informed peer | Guest teaching | Guest disagreement | Harry pushing back | Why |
|---|---|---|---|---|---|---|
| The Power of Fragmented Supply | 4 | 3 | 1 | 3 | Harry offers a quick roleplay from a VC perspective to demonstrate how investors evaluate slow supply aggregation. Jeff agrees with the premise and expands on OpenTable's long build to critical mass. | |
| Reaching Critical Mass and Curation Metrics | 3 | 4 | 1 | 1 | Harry asks standard exploratory questions around choice overload and acquiring supply. Jeff provides expert frameworks regarding tipping points and supply-side Cold Start dynamics. | |
| Channel Conflict and the Limits of Owning Supply | 5 | 4 | 1 | 2 | Harry demonstrates sector knowledge by citing Bezos's 'one way door' concept and a specific statistic about millennial search behavior on TikTok. Jeff responds with high-level institutional insights on channel conflict and paid acquisition. | |
| CAC Inflation and Defensive Growth in Tight Capital Eras | 7 | 7 | 5 | 7 | Harry strongly pushes back, asserting that non-unit-efficient marketplace models destroy capital and citing low returns on Uber. Jeff forcefully disagrees and educates Harry on advance-payment marketplace dynamics using Airbnb and Incredible Health as counterexamples. | |
| The Art of Messaging and the Collectibles Playbook | 5 | 4 | 1 | 3 | Harry outlines his own explicit founder-coaching strategy regarding hyper-specific customer targeting. Jeff validates the theme while offering historical context on eBay's expansion from collectibles to general inventory. | |
| Evaluating Market Timing and Preserving Mental Plasticity | 5 | 5 | 3 | 4 | Harry challenges Jeff on market timing risks, catching Jeff's phrasing to point out an apparent contradiction. Jeff reframes market timing using Mike Moritz's investment in Webvan versus Instacart. | |
| Cohort Retention and Optimizing Unit Economics | 6 | 5 | 1 | 4 | Harry introduces the thesis of negative network effects in quick-commerce and references Peloton leadership strategies regarding Netflix margin steering. Jeff breaks down how Instacart systematically engineered unit profitability. | |
| Core vs. Experimental Budgets and Sending Out Bat Signals | 7 | 4 | 3 | 7 | Harry pushes back directly against early channel diversification, arguing founders shouldn't 'get cute' if core channels work. He also forcefully challenges local service unbundling due to platform leakage, though Jeff maintains his timing thesis. |
Statements from this episode (26)
OpenTable Targeted 30,000 to 50,000 Single-Location Restaurants
“Open table by contrast had, you know, the target market was 30 or 40 or 50,000 restaurants Almost all of which were the, had one, the owner only managed one restaurant.”
Jordan: Aggregated Fragmented Marketplaces Are Brutally Hard to Compete With
“And so it was brutally hard to aggregate, but once you're aggregated, you know, it's brutally hard to compete with it. And no supplier has supplier power.”
Jordan: OpenTable Used a 'Come for the Tool' Marketplace Strategy
“Open table is pretty interesting because it was a long slog before it became an overnight success because aggregating supply did take time. It was a classic come for the tools, stay for the network. Play. And so early on in a city, when you're just selling the…”
Jordan: Local Marketplaces Reach a Tipping Point at 10% Supply
“There was a tipping point in each market. It's something like 10% of the target market supply where diners finally said, okay, this is so much more convenient than calling a restaurant one at a time, getting put on hold, getting voicemail, getting all this and…”
Jordan: Most Successful Marketplaces Are Permanently Supply-Constrained
“Most markets, even successful marketplaces typically are supply constrained. You know, Airbnb always is looking for new supply to enhance the user experience.”
Jordan: Owning Supply in Two-Sided Marketplaces Creates Channel Conflict
“You know, I think it's pretty hard to do that on, you know, on, on two-sided marketplaces, just because of channel conflict.”
Jordan: Instacart Avoids Owning Grocery Inventory to Preserve Partner Trust
“That channel conflict is something that Instacart has no desire to do. They want to be the go to partner for the for the gross, the physical grocer.”
Stebbings: 45% of Millennials Use TikTok Over Google for Search
“I saw an unbelievable stat, which is like, 45% of millennials use TikTok instead of Google as their primary search engine.”
Jordan: a16z Avoids Investing in Startups Reliant on Paid Marketing
“I am reluctant to invest in companies that, that require heavy paid marketing to build their audience.”
Jordan: TikTok Buys Users at Scale Unlike Early Google or Facebook
“That's not a categorical rule, because TikTok buys users at monstrous scale. But, you know, Google really didn't buy many users, Facebook didn't buy many users, you know, tick, tick, tick, tick.”
Jordan: Amazon Was the Only Profitable Direct E-Commerce Company
“No one could make money other than Amazon because of there's just no defensibility, no barriers to entry.”
Jordan: a16z Advises Portfolio Startups to Delay Fundraising as Long as Possible
“You know, we're today counseling our businesses, try to be try not to need to go to market for as long as you sustainably can without hurting the business.”
Stebbings: 97% of Capital Invested in Uber Will Not Return 1x
“97% of the money that's gone into Uber will not return one X, just given the quantum of money.”
Jordan: Airbnb Was Cashflow Positive Early Due to Upfront Payments
“Airbnb raised way less money than, you know, the other leading marketplaces at the time. It's got a couple of characteristics and that are very nice. One of which is they get paid in advance. And so, you know, when you make your summer vacation over the holida…”
Jordan: Incredible Health Had More Cash Pre-Series B Than Post-Series A
“Incredible health went you know, we did the a, they went three years without raising while the business was going very well. And when Iman finally did raise earlier this year. She had more cash in the bank when she raised than she did when after we funded her.”
Jordan: a16z Invested in Incredible Health at a $60M Post-Money Valuation
“When you raise at 1.65 billion, I think our round was 60 post. You know, you are, you're not taking a lot of dilution.”
Jordan: a16z Avoids Basing Investment Decisions on Current Market Size
“We strive as a firm not to base investment decisions on current market size, because a lot of the best businesses created new markets to create new markets.”
Jordan: Benchmark Originally Invested in eBay as a Collectibles Marketplace
“When Benchmark wrote the joint, Bob Cagle and Benchmark wrote the check, he was investing in a collectibles marketplace.”
Jordan: eBay's Best Growth Strategy Was Making Organic User Listings Discoverable
“So eBay became a mechanism for that, for computers, for sporting goods, for, you know, and so the most successful growth strategy we had back in the day was just look what people were listing. And then try to enable it to be found on a much more systemic basis…”
Jordan: Instacart Lost 75% of Early Users but Held 100% Revenue Retention
“A year out, you know, the number of users declined something like three quarters But the users that stayed spent you know, three or four times more money. So their cohorts were actually on revenue basis were, you know, close to staying at 100%.”
Jordan: a16z Avoided Fast Commerce, Viewing It as a Kozmo Redo
“We didn't make a bet in in fast commerce. That's one word that some of us internet veterans remember Cosmo and, you know, our concern was it's Cosmo redo redo without anything really new. On top of it. So we did not place a bet in that in that sector.”
Jordan: Instacart Lost $20 to $25 Per Order When a16z Invested
“When I, from recollection, they were billing something like 10 or 12 dollars per order when we invested and they were losing 20, 25 dollars per order on each one.”
Jordan: CACs Always Rise at Scale, Making Low LTV/CAC Dangerous
“The concern I have on CACs is they typically go up in my experience as you try to scale the acquisition. And, you know, part of that could be competitive dynamics. If you're paying, you know, your, the 10 mattress in a box customers trying to buy the, find the…”
Jordan: Startups Must Separate Experimental Marketing Budgets From Core Acquisition
“I love the companies that have, they segregate an experimental budget from their core, core acquisition budget, just to, because if you bundle them together, it is a barrier against experimentation. If you're constantly optimizing Google and Facebook, but you'…”
Jordan: Demand Is the Primary Strategic Side in Two-Sided Marketplaces
“I have a belief that the demand side is, you know, kind of the, is the more, more strategic side because suppliers typically will go wherever the demand is. And so for me, keeping a healthy demand Bucket, you know, is what your suppliers are looking for.”