Demo Day Heat Check
An independent data study
Does Demo Day
hype predict success?
We tracked 274 of the most hyped YC companies across 20 years to find out if fundraising momentum at Demo Day predicts long-term outcomes.
The answer surprised us.
0.09
R² correlation
Demo Day hype → valuation
~25%
Look like winners
at the end of YC batch
~6%
Actually become
unicorns ($1B+)
50%
Ultimately
fail entirely
Not affiliated with Y Combinator. Independent research by @Trace_Cohen
The companies nobody wanted
are worth $298B+ today.
Airbnb was rejected 7+ times. DoorDash was bottom half of its batch. Coinbase couldn't fill a $1M round. Meanwhile, the companies investors fought over at Demo Day? Many raised hundreds of millions — and are now worth $0.
The Sleepers
$0B+
Combined valuation of 89 companies that were overlooked or struggled at Demo Day
The Darlings That Died
$0
39 companies that were hyped at Demo Day but raised $1.5B+ and failed
Top 25 most valuable
Orange = sleepers nobody wanted. Green = hot from day 1. Blue = moderate. Red = hot but failed.
All 274 companies
Search by name, industry, or batch. Filter by category.
| Company | Batch | Valuation |
|---|---|---|
| Stripe | S09 | $159B |
| Airbnb | W09 | $84B |
| DoorDash | S13 | $72B |
| Anysphere | S22 | $60B |
| Coinbase | S12 | $43B |
| S05 | $33B | |
| Scale AI | S16 | $29B |
| Rippling | W17 | $20.8B |
| Deel | W19 | $17.3B |
| Helion Energy | W14 | $15.5B |
| Whatnot | W20 | $11.5B |
| Supabase | S20 | $10.5B |
| Instacart | S12 | $10B |
| Gusto | W12 | $9.5B |
| Razorpay | W15 | $9.2B |
| Meesho | S16 | $9B |
| Groww | W18 | $9B |
| Replit | W18 | $9B |
| Flock Safety | S17 | $8.4B |
| Zepto | W21 | $7B |
| Athelas | S16 | $7B |
| Dropbox | S07 | $6.4B |
| Oklo | S14 | $6.16B |
| Rigetti Computing | S14 | $6.16B |
| Benchling | S12 | $6.1B |
| EquipmentShare | W15 | $5.7B |
| Fivetran | W13 | $5.6B |
| Legora | W24 | $5.6B |
| Faire | W17 | $5.2B |
| Rappi | W16 | $5.2B |
| Mercury | S19 | $5.2B |
| Brex | W17 | $5.15B |
| Zapier | S12 | $5B |
| GitLab | W15 | $4.7B |
| GrubMarket | W15 | $4.5B |
| Relativity Space | S16 | $4.2B |
| Vanta | W18 | $4.15B |
| Webflow | S13 | $4B |
| Airtable | W12 | $4B |
| GOAT Group | W11 | $3.7B |
| Flutterwave | S16 | $3.25B |
| Segment | S11 | $3.2B |
| Retool | W17 | $3.2B |
| Ironclad | S15 | $3.2B |
| Podium | W16 | $3B |
| Lattice | W16 | $3B |
| Outschool | W16 | $3B |
| Lambda | S17 | $2.9B |
| Corgi Insurance | S24 | $2.6B |
| Melio | W19 | $2.5B |
Nobody wanted them.
Rejected at Demo Day. Now worth billions.
Bottom half of batch at Demo Day. Nearly died in 2017–18.
Only $320K committed when pitching a $1M seed round.
19 years from YC to IPO. Longest timeline of any YC company.
Fusion energy startup. Sam Altman became chairman. Contract to power Microsoft. $15.5B.
100+ investor meetings. Raised from friends. Pivoted post-Demo Day. Series F at $11.5B.
Applied late. Rejected multiple times. Delivered beer to Garry Tan's door.
+ 83 more sleepers in the full directory above
Everyone fought over them.
Hottest at Demo Day. VCs piled in. All dead.
SPAC at $17.5B valuation. Stock crashed 97%. Synthetic biology hype cycle.
Jeff Bezos invested. Valued at $3.8B. Shut down Oct 2023.
a16z Series A. $4.5B peak valuation. CEO ousted for fraud.
Peaked at $13B during NFT mania. Sold to Coinbase for undisclosed amount at massive loss.
Alternative lending for the underbanked. Raised $350M but CFPB shut them down in 2021 for deceptive practices.
SPAC at $5.2B. Stock crashed to $60M. Shut down 2023.
+ 33 more failures in the full directory
The pundits were wrong.
Every. Single. Time.
In every batch we tracked, TechCrunch's “Top Picks” missed the actual biggest winner.
S13
2013top picks failed or acqui-hired
BIGGEST WINNER NOT PICKED
DoorDash ($71B IPO)
SpoonRocket, Buttercoin, Standard Treasury
W14
2014top picks failed or acqui-hired
BIGGEST WINNER NOT PICKED
Cruise ($30B exit)
Dating Ring (#2), Kimono Labs, Boostable, BatteryOS…
W19
2019top picks failed or acqui-hired
BIGGEST WINNER NOT PICKED
Deel ($17.3B)
Flockjay, Docucharm, Parker (bankrupt)
5 companies = 55%+ of all value
YC's returns follow an extreme power law. Stripe, Airbnb, DoorDash, Cursor, and Scale AI account for over half of all YC portfolio value.
of YC companies are decacorns
>$10B — account for >55% of total value
become unicorns at all
Account for 90% of total YC value
companies in the YC Graveyard
Documented failures across all batches
of the top 5 were sleepers
Airbnb, DoorDash, and Cursor were overlooked
Category Breakdown
89
Sleepers that won
$298B total
48
Hot & won
$452B total
91
Moderate & won
$151B total
39
Hot & failed
$0B total
How fast did they scale?
Time from founding to unicorn status ($1B+ valuation). The fastest got there in 1–2 years. Some took over a decade. Many never made it.
5.9y
Avg. years to unicorn
1.9y
Avg. seed → Series A
135
Reached unicorn status
30
Completely dead
Fastest to Unicorn
Years from founding to $1B+ valuation
Time to Unicorn Distribution
Current Status
267 companies tracked
The analytics
Total value created by YC batch year. Some vintages are worth 100x more than others.
Even YC can't predict winners
“
The hard part was predicting how tough and ambitious they would become. I learned to maintain a completely open mind about which startups in each batch would turn out to be the stars.
Paul Graham
YC Co-founder
“
About 25% of YC companies appear to be on a trajectory for billion-dollar valuations at the end of YC, but only a handful actually achieve it.
Sam Altman
Former YC President
“
Tar pit ideas get enthusiastic Demo Day reception but trap founders. They've been tried since the '90s. The real advice is simpler: just don't die.
Dalton Caldwell
YC Managing Director
“
There are no specific events that will automatically get money from an investor. I've seen founders cross $1M ARR and still not be able to raise.
Aaron Harris
Former YC Partner
The signal isn't in the sizzle.
It's in the survival.
Demo Day hype is a weak predictor of YC startup success. The R² is 0.09. The correlation is 0.23. In every batch we tracked, the pundits missed the biggest winner. The most iconic YC successes were the companies nobody wanted.
Sources & Methodology
Rebel Fund: What Predicts YC Success (Jared Heyman)
Rebel Fund: Investing in Hot YC Startups
Rebel Fund: Power Law of YC Startups
Sam Altman: The Post-YC Slump
Aaron Harris: Fundraising Isn't Predictable
Sequoia: Crucible Moments — DoorDash
TechCrunch: YC S13, W14, W19 Demo Day Coverage
Contrary Research: Webflow, Checkr, Whatnot
First Round Review: GOAT's Path to PMF
YC Graveyard Database (821+ companies)
Eqvista: Top 100 YC Companies
274 companies tracked across 20 years of YC batches
Not affiliated with Y Combinator. Valuations from most recent public reports as of June 2026. “Failed” = shut down, acqui-hired for <$10M, or filed bankruptcy.