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Batch index

Y Combinator batches, by outcome

Y Combinator publishes who joined each batch. Dealroom records what happened next.

Every batch since 2005, charted: batch size, sector mix, money raised and the largest outcomes. Membership comes from YC's official directory, so the list of companies is exactly the one YC publishes. Everything after that comes from Dealroom company records, joined on website domain.

47
Batches
S05 to S26
6,162
Companies
Y Combinator's official directory
$145B
Raised since Demo Day
5,680 companies with funding on record
126
Unicorns ($1B+ valuation)
Across 5,853 matched companies

Coverage: 5,853 of 6,162 companies (95%) are joined to a Dealroom company record. Batch membership, sector and country cover every company; money raised, valuations and unicorn counts are computed over the matched companies and are floors, not totals.

Batch size

Batch size over time

Companies in each batch, from 9 in S05 to a peak of 398 in W22. The toggles switch to money raised since each batch and to unicorn counts, both from Dealroom's records of the matched companies.

View as table
BatchCompaniesMatched on DealroomRaisedUnicorns
S0599$1.3B1
W0677$46.3M0
S061111$165.5M0
W071313$82.3M1
S071918$680.2M1
W082120$19.1M0
S082220$30.7M0
W091615$3.8B1
S092625$9.1B2
W102726$40.2M1
S103636$1.1B2
W114545$1.5B2
S116060$2.2B3
W126663$3B5
S128377$5.1B6
W134644$2.7B2
S135250$3.8B3
W147472$13.5B5
S147877$4.9B7
W15110106$4.9B5
S1510497$6.8B7
W16122118$10.5B16
S1610296$6.7B6
W17116111$6.8B7
S17125114$3.9B4
W18146141$6.3B11
S18131126$3.3B3
W19194181$6.9B4
S19176168$3.7B3
W20229217$5.1B3
S20209198$4.7B4
W21336325$8.9B3
S21391378$3.5B3
W22398380$2B0
S22234218$1.2B0
W23274260$1.4B1
S23220202$1.4B1
W24248232$1.7B1
S24248233$988.5M2
F249487$96.1M0
W25167156$310M0
X25143135$448M0
S25166163$204.3M0
F25146138$114.3M0
W26198190$150.8M0
X26196191$169.9M0
S26228204$143.7M0

Sectors

Sector mix by batch

Each batch by YC's own sector label, which covers every company in the batch. AI is not a sector in YC's taxonomy — the strip underneath counts companies carrying an AI-related tag instead.

B2BConsumerFintechHealthcareIndustrialsEducationReal Estate and ConstructionGovernmentOther

Companies with an AI tag

Share of each batch that YC tags "AI", "Artificial Intelligence", "Generative AI" or "Machine Learning" — 152 of 228 companies (67%) in S26. The line covers batches where YC has tagged at least half the companies, so it starts at S09, and the dashed span bridges W10, W26 and X26, where tagging is still in progress.

View as table
BatchB2BConsumerFintechHealthcareIndustrialsEducationReal Estate and ConstructionGovernmentOtherAI tag
S055310000000
W064300000000
S062900000001
W073710200000
S0771200000000
W0812810000000
S0881400000001
W095900002000
S0991220012001
W1017900001000
S10161620011001
W11231432021000
S11301843032003
W12302152323002
S12432734150002
W13251226100002
S13261544021001
W14371842522045
S1427221010601116
W1544219204063320
S1541259111033023
W165222101910231316
S16313271110441215
W174122121812251320
S172733141916664024
W18553511288432027
S18451814379431028
W198137222515752033
S1970272524125112029
W2010129323617590053
S201082724326453039
W21162395141231361072
S21180396365201581098
W221793890442481410122
S2212022432514190098
W2318421322363410141
S231529162863600139
W2415728182993310162
S24160191223251440163
F245711695141057
W251049131119524096
X2597771115312087
S2511510713142410101
F25901881112052091
W261248181628040034
X2611613201725041026
S26119121620521620152

Outcomes

The 36 largest YC outcomes

Every YC company since 2005 by the latest valuation on Dealroom's record, sized by that valuation and colored by YC sector. Acquired and listed companies stay at their last recorded valuation; companies Dealroom marks closed are excluded. Tap a tile for the company.

Stripe $159B · S09 Stripe — $159B latest valuation (2026) · YC S09 · Fintech Airbnb $101B · W09 Airbnb — $101B latest valuation (2026) · YC W09 · Consumer DoorDash $89.8B · S13 DoorDash — $89.8B latest valuation (2026) · YC S13 · Consumer Ramp $44B · S15 Ramp — $44B latest valuation (2026) · YC S15 · Fintech Coinbase $36.9B · S12 Coinbase — $36.9B latest valuation (2026) · YC S12 · Fintech Scale $29B · S16 Scale — $29B latest valuation (2025) · YC S16 · B2B Reddit $27.3B · S05 Reddit — $27.3B latest valuation (2026) · YC S05 · Consumer Kalshi $22B · W19 Kalshi — $22B latest valuation (2026) · YC W19 · Fintech Whatnot $20B · W20 Whatnot — $20B latest valuation (2026) · YC W20 · Consumer Deel $17.3B · W19 Deel — $17.3B latest valuation (2025) · YC W19 · B2B Rippling $16.8B · W17 Rippling — $16.8B latest valuation (2025) · YC W17 · B2B Groww $15.9B · W18 Groww — $15.9B latest valuation (2026) · YC W18 · Fintech Helion Energy $15.5B · S14 Helion Energy — $15.5B latest valuation (2026) · YC S14 · Industrials OpenSea $13.3B · W18 OpenSea — $13.3B latest valuation (2022) · YC W18 · Consumer Faire $12.6B · W17 Faire — $12.6B latest valuation (2023) · YC W17 · B2B Meesho $11.6B · S16 Meesho — $11.6B latest valuation (2026) · YC S16 · B2B Instacart $10.6B · S12 Instacart — $10.6B latest valuation (2026) · YC S12 · Consumer Supabase $10.5B · S20 Supabase — $10.5B latest valuation (2026) · YC S20 · B2B Dropbox $10.4B · S07 Dropbox — $10.4B latest valuation (2026) · YC S07 · B2B Replit $9B · W18 Replit — $9B latest valuation (2026) · YC W18 · B2B Flexport $8B · W14 Flexport — $8B latest valuation (2022) · YC W14 · B2B Razorpay $7.5B Razorpay — $7.5B latest valuation (2021) · YC W15 · Fintech Flock Safe… $7.5B Flock Safety — $7.5B latest valuation (2025) · YC S17 · B2B EquipmentSh… $7.2B · W15 EquipmentShare — $7.2B latest valuation (2026) · YC W15 · Real Estate and Construction Oklo $6.3B Oklo — $6.3B latest valuation (2026) · YC S14 · Industrials Benchling $6.1B Benchling — $6.1B latest valuation (2021) · YC S12 · B2B GitLab $5.6B GitLab — $5.6B latest valuation (2026) · YC W15 · B2B Fivetran $5.6B Fivetran — $5.6B latest valuation (2021) · YC W13 · B2B Legora $5.6B Legora — $5.6B latest valuation (2026) · YC W24 · B2B Rigetti Co… $5.5B Rigetti Computing — $5.5B latest valuation (2026) · YC S14 · Industrials Rappi $5.2B Rappi — $5.2B latest valuation (2021) · YC W16 · Consumer Brex $5.2B Brex — $5.2B latest valuation (2026) · YC W17 · Fintech Checkr $4.6B Checkr — $4.6B latest valuation (2021) · YC S14 · B2B GrubMarket — $4.5B latest valuation (2026) · YC W15 · B2B BillionToOne — $4.3B latest valuation (2026) · YC S17 · Healthcare Relativity Relativity — $4.2B latest valuation (2023) · YC W16 · Industrials
B2BConsumerFintechHealthcareIndustrialsReal Estate and Construction
View as table
#CompanyBatchSectorLatest valuationValuation year
1StripeS09Fintech$159B2026
2AirbnbW09Consumer$101B2026
3DoorDashS13Consumer$89.8B2026
4RampS15Fintech$44B2026
5CoinbaseS12Fintech$36.9B2026
6ScaleS16B2B$29B2025
7RedditS05Consumer$27.3B2026
8KalshiW19Fintech$22B2026
9WhatnotW20Consumer$20B2026
10DeelW19B2B$17.3B2025
11RipplingW17B2B$16.8B2025
12GrowwW18Fintech$15.9B2026
13Helion EnergyS14Industrials$15.5B2026
14OpenSeaW18Consumer$13.3B2022
15FaireW17B2B$12.6B2023
16MeeshoS16B2B$11.6B2026
17InstacartS12Consumer$10.6B2026
18SupabaseS20B2B$10.5B2026
19DropboxS07B2B$10.4B2026
20ReplitW18B2B$9B2026
21FlexportW14B2B$8B2022
22RazorpayW15Fintech$7.5B2021
23Flock SafetyS17B2B$7.5B2025
24EquipmentShareW15Real Estate and Construction$7.2B2026
25OkloS14Industrials$6.3B2026
26BenchlingS12B2B$6.1B2021
27GitLabW15B2B$5.6B2026
28FivetranW13B2B$5.6B2021
29LegoraW24B2B$5.6B2026
30Rigetti ComputingS14Industrials$5.5B2026
31RappiW16Consumer$5.2B2021
32BrexW17Fintech$5.2B2026
33CheckrS14B2B$4.6B2021
34GrubMarketW15B2B$4.5B2026
35BillionToOneS17Healthcare$4.3B2026
36RelativityW16Industrials$4.2B2023
37VantaW18B2B$4.2B2025
38ZapierS12B2B$4B2021
39WebflowS13B2B$4B2022
40BirdS16B2B$3.8B2021
41GoatW11Consumer$3.7B2021
42SegmentS11B2B$3.2B2020
43IroncladS15B2B$3.2B2022
44FlutterwaveS16Fintech$3.2B2026
45RetoolW17B2B$3.2B2022
46LatticeW16B2B$3B2022
47OutschoolW16Education$3B2021
48PodiumW16B2B$3B2021
49AstranisW16Industrials$2.8B2026
50Hightouch | Carry TechnologiesS19B2B$2.8B2026

Explore

Country and sector, batch by batch

Drag the handles to a run of batches. Country and sector come from YC's directory and cover every company in the range; money raised comes from Dealroom's records.

Country

Sector

Latest batches

Most funded from W26, X26 and S26

The companies from the last three batches that have raised the most on Dealroom's record. This early, most of the batch has no funding on record yet.

REX
$108M raised · S26 · United States
AI Native BPO for Enterprise Order to Cash
Luel
$31.6M raised · W26 · United States
Turning everyday words and actions into usable training data.
Ploy
$27.1M raised · X26 · United States
Ploy turns your website into your company's growth engine.
Tolmo
$22.1M raised · X26 · United States
Tolmo is the AI security platform that secures every layer of cloud…
Drafted
$16M raised · X26 · United States
Design your home instantly with AI
Tasklet
$13.1M raised · X26 · United States
Agents that own the work
Clara
$12.1M raised · X26 · United States
AI primary care doctor
General Legal
$11.6M raised · W26 · United States
Elite AI law firm for high growth companies
Pocket
$11.1M raised · W26 · United States
Take Notes in the Real World
Stilta
$10.6M raised · W26 · Sweden
Agentic AI for intellectual property
Beyond Reach Labs
$10.1M raised · W26 · United States
Space solar arrays that grow to the size of a football field in orbit
Aseon Labs
$10.1M raised · X26 · United States
Robotic pitstops for self-driving cars

Batch pages

One batch page is published so far

W21 covers 336 companies, 325 of them matched to a Dealroom company record. More pages follow, built the same way. The charts above already cover every batch; a company-by-company page is published once its roster has been reviewed — there are no placeholder pages.

Y YC Winter 2021 W21
336Companies
$8.9BRaised
3Unicorns
97%Dealroom coverage
March 2021 32 acquired or exited

What the index shows

What a batch page contains

Every page is the same shape, so two batches can be read against each other.

  • Batch roster and status. Every company YC lists, with the status YC gives it: active, inactive or acquired.
  • Data coverage. How many of the batch are joined to a Dealroom company record, and by which method. Across the index that is 5,853 of 6,162 companies.
  • Money raised. Total funding on Dealroom's record, with the number of companies it is computed over stated next to it.
  • Outcomes. Unicorns, acquisitions and closures, counted over matched companies only.
  • Sector and country. From YC's own directory, so the distributions cover the batch in full.
  • The full member list. Every company in one table, crawlable, with a link to its Dealroom profile where one is published and to its YC page otherwise.

There is no composite score and no ranking of batches against each other. The counts are shown with the population they are computed over, and where Dealroom has no record the cell is empty rather than zero.

Open YC Winter 2021 for the full method note.

Track any cohort in Dealroom

Accelerator batches, university spinouts, sector cohorts — with live funding, valuation and headcount data.

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