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Public company data

Y Combinator companies, by batch

Y Combinator (YC) is a startup accelerator that funds companies in batches, several times a year.

6,331 companies and 11,952 founders across 49 batches (Summer 2005 to Winter 2027). Data as of Oct 17, 2026. Fall 2026 Demo Day is Dec 2, 2026.

Browse Fall 2026View on ycombinator.com (opens in a new tab)

Current and recent batches

Every batch, by year

Company counts as of each batch's last sync.

2027
2026
2025
2024
2023
2022
2021
2020
2019
2018
2017
2016
2015
2014
2013
2012
2011
2010
2009
2008
2007
2006
2005

More public data

About this data

Company facts and descriptions come from Y Combinator's public directory. Each company page links to its original listing.

While a batch is still filling, we check its roster every day, and each page shows the date of the last check. Companies that drop off the directory drop off the roster here too.

Profiles marked as GPAgent's are our own fund-neutral summaries, written from public information. No fund's scores, notes, or pipeline go into them.

Source: ycombinator.com (opens in a new tab) GPAgent is not affiliated with Y Combinator.

Score every batch against your own thesis

GPAgent's sourcing agent reads every company in a batch, scores each one against your fund's thesis in a private workspace, and lines up the founders worth meeting before Demo Day. You decide who to contact. Your scores, notes, and pipeline never appear on these pages.

How Accelerator intelligence works