The Y Combinator acceptance rate hit 0.6% in Summer 2025, the lowest on record. Here are 43 statistics on YC acceptance rates, batch sizes, outcomes, AI trends, and team composition.
The Y Combinator acceptance rate for Summer 2025 hit 0.6%, the lowest in the accelerator's history. That puts YC below Harvard (3.59%), Stanford (3.70%), and MIT (4.52%) in selectivity. With over 40,000 applications competing for roughly 200 spots per batch, understanding the real numbers gives you a clearer picture of what you're up against.
YC does not publish official acceptance rate figures, but the math is public: divide accepted companies by estimated application volume. The resulting statistics reveal how the funnel works, how selectivity has changed over 20 years, and what separates the 200 who get in from the tens of thousands who don't.
In this guide, you'll find the most current Y Combinator acceptance rate statistics organized by theme, with sources linked inline.
YC's acceptance rate has been falling for over a decade, driven by rising application volume rather than shrinking batch sizes. The most recent data makes the pre-2025 "1.5–2%" benchmark obsolete.
1. The S25 acceptance rate was 0.6%, the lowest in YC's 20-year history, as application volume surged above 25,000 for that single batch.
2. The Winter 2026 acceptance rate came in at approximately 1%, with 196 companies funded from an estimated 20,000 applications.
3. YC receives between 20,000 and 40,000+ applications per batch; the exact number is not officially published, but the range has been consistent across recent cohorts.
4. With four batches per year since 2025, YC now processes approximately 70,000–80,000 applications annually.
5. A single peak batch receives more than 40,000 applications for roughly 200 spots, a sub-1% rate tighter than Harvard, MIT, and Stanford combined.
6. YC's selectivity compared to elite universities (2024): Harvard 3.59%, Stanford 3.70%, MIT 4.52%, YC S25 0.60%.
7. The commonly cited "1.5–2%" figure is outdated; Winter 2022 had 17,000 applications and funded 414 companies (2.4%), while recent batches have dropped well below 1%.
The headline acceptance rate is the final output of a two-stage filter. Your odds at each stage look very different from the aggregate 1% figure.
8. Stage 1 (written application): between 1,500 and 3,000 teams receive interview invitations from each batch, representing a 7%–10% pass-through rate from total applications.
9. Stage 2 (10-minute interview): of the teams who interview, 15%–25% receive an offer, making the interview stage a dramatically better odds game than the raw 1% implies.
10. The complete funnel: applications in the tens of thousands filter to 1,500 partner interviews and roughly 250 funded companies. The written application is the single biggest bottleneck.
11. Interviews are 10-minute video calls with YC partners; decisions come back the same day, and YC states that everyone who interviews receives detailed feedback on their decision.
12. Founders who reach the interview stage face roughly 20–25% odds of receiving an offer, which means the written application is where more than 90% of the competition ends.
YC started as a tiny summer experiment. The 20-year arc from 9 companies to 5,668 tells the full story of how the accelerator became the most influential in the world.
13. YC funded just 9 companies in its first batch (Summer 2005); by 2021, that had grown to 727 companies in a single year, the all-time peak.
14. Winter 2022 remains the single largest batch in YC history at 414 companies, funded from 17,000 applications.
15. Annual company counts across key years: 2015: 216 | 2019: 371 | 2021: 727 | 2022: 634 | 2023: 495 | 2024: 593 | 2025: 632.
16. Since its founding in 2005, YC has funded approximately 5,668 unique companies across all batches.
17. Under the 4-cohort model launched in 2025, recent batch sizes are: Spring 2025 (X25): 144 companies | Summer 2025 (S25): ~160–169 | Fall 2025 (F25): 155 companies | Winter 2026 (W26): 196 companies.
Getting into YC is one filter. What happens after is what the numbers actually reveal about the program's track record.
18. 69.02% of all YC-funded companies across every batch are currently active, as of early 2026.
19. 12.86% of YC companies have been acquired, representing the primary exit path for companies that don't stay independent.
20. 17.71% of YC companies are inactive, translating to a roughly 87% survival rate that exceeds most startup cohorts.
21. Only 0.41% of YC companies have gone public, which is roughly 23 IPOs from a portfolio of 5,668 companies.
22. The combined YC portfolio valuation exceeds $600 billion, making YC's portfolio more valuable than most venture capital firms combined.
23. YC portfolio companies have raised more than $145 billion in follow-on funding since 2005.
24. Over 100 YC companies are valued above $1 billion (unicorn status), and more than 400 companies are valued above $100M.
25. 25.16% of active YC portfolio companies are currently hiring, a useful proxy for portfolio-wide growth activity.
Every accepted company gets the same deal with no negotiation. Understanding the standard terms and what happens after Demo Day puts the acceptance into financial context.
26. Every accepted company receives $500,000 in funding on identical standard terms: $125,000 for 7% equity via a post-money SAFE, plus $375,000 on an uncapped SAFE with Most Favored Nation provisions.
27. 70% of YC companies that raise a Series A do so within 18 months of Demo Day, according to YC's own published data.
28. In Q1 2026, global venture capital reached $300 billion. Four mega-deals (OpenAI, Anthropic, xAI, Waymo) accounted for 63% of that total, making a YC acceptance letter one of the strongest early-stage signals you can send to investors.
Who gets into YC has shifted dramatically over 20 years. The B2B swing that started in the early 2010s has only accelerated.
29. 84.47% of all YC-funded companies are B2B; consumer startups make up just 15.21%, down from roughly one-third of batches in 2005.
30. In Summer 2025 (S25): B2B SaaS 68%, Deep Technology 11%, Fintech/Logistics/GovTech 11%, B2C Consumer 8%, Industrial/Hardware 4%.
31. The top five industries by total company count across all batches: B2B (2,863 companies), Consumer (862), Healthcare (653), Fintech (606), Industrials (347).
32. 68.93% of YC companies are US-based, even as YC accepts international teams and requires in-person attendance in San Francisco for the program.
33. The Summer 2021 batch represented 47 countries, with roughly 50% of companies based outside the US; top non-US countries included India (33 companies), Canada (18), UK (18), and Mexico (17).
34. 66% of Winter 2026 companies are headquartered in San Francisco, continuing a geographic reconcentration trend that accelerated when YC moved its campus to SF's Dogpatch neighborhood.
35. In Winter 2021, 19% of YC companies had at least one woman founder, and 10% of all founders were women.
36. In Winter 2021, 7% of YC companies had at least one Black founder, and 5% of all founders were Black.
The AI shift inside YC batches over 2025 is one of the fastest category transitions the accelerator has ever recorded.
37. AI company share across 2025 batches: W25 36% (58/163) → X25 46% (67/144) → S25 88% (141/160) → F25 92% (143/155).
38. Summer 2025 was 88% AI-native companies, with only 10 out of 160 batch companies building outside the AI category.
39. 25% of current YC startups have 95% of their code written by AI, as of early 2026, signaling the arrival of the "10-person $100B company" thesis YC has been publicly pushing.
40. The word "AI" appears 4,188 times in YC company descriptions across all 5,668 funded companies, more than twice the frequency of "data" (1,776) and three times "platform" (1,377).
The profile of a funded YC company in 2026 is leaner and faster-moving than at any prior point in the program's history.
41. The median founding team across all 5,668 YC companies is 6 employees; founding teams have gotten smaller over time even as successful companies scale bigger.
42. 63% of S25 companies have exactly two founders; 18% are solo founders; 19% have three or more co-founders.
43. Demo Day traction benchmarks in 2025: the top 5–10% of companies have $150K–$500K ARR and raise $2M at $20–25M post-money. The mid tier (60%) shows $3–5K/month revenue and raises $2M at roughly $20M post-money; pre-revenue companies struggle to close post-batch.
The 0.6%–1% acceptance rate is real, but it describes the full population of applicants, including thousands of submissions with incomplete teams, no product, and no traction. Your personal odds depend almost entirely on which segment of the applicant pool you're in.
The funnel data points to where the real filter sits. Between 7% and 10% of applications reach the interview stage. Once you're in the room, your odds improve to 15%–25%.
That means the written application is where more than 90% of the competition ends. Before optimizing your interview, fix the application.
The AI trend is structural, not cyclical. Going from 36% to 92% AI companies in four consecutive batches is not a phase; it's a signal about what YC believes will matter in the next decade. If you're building outside AI, you're competing for the remaining 8% of batch slots, which means your differentiation needs to be sharper.
The post-YC outcome data sets a realistic baseline. A 69% active rate and $145 billion in follow-on funding are strong aggregate numbers. But only 100+ companies out of 5,668 are unicorns.
YC selects for the potential to build something very large; it does not guarantee it. The accelerator opens doors, but what you do in the 11 weeks and the 18 months after Demo Day is the actual variable.
Y Combinator's acceptance rate has never been lower: 0.6% in Summer 2025, with recent batches settling in the 1% range as application volume climbs and batch sizes stay small. For founders deciding whether to apply, the more actionable number is the 15%–25% offer rate at the interview stage. The written application is the gate that matters most.
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