Y Combinator portfolio Developer tools companies
The most prolific seed accelerator in the world, batch class twice a year. Filtered to companies in Developer tools.
Edit the query above, or pick a refinement. 100 free credits on sign-up, no card needed.
- InvestorY Combinator
- IndustryDeveloper tools
- Matches1,191
Built from a search like: “Y Combinator-backed Developer tools companies”
Ranked by current headcount across Y Combinator-backed Developer tools companies. Refreshed daily.
- 1DoorDash· San Francisco, California, United States
- Post-IPO debt
- 80.7k employees
- Founded 2013
- 2Airbnb· San Francisco, California, United States
- Post-IPO debt
- 68.6k employees
- Founded 2007
- 3Instacart· San Francisco, California, United States
- Private equity
- 24.8k employees
- Founded 2012
- 4Twitch· San Francisco, California, United States
- Series C
- 14.7k employees
- Founded 2011
- 5Café (YC S21)· New York, New York, United States
- Pre-seed
- 13.2k employees
- Founded 2020
Y Combinator’s Developer tools portfolio
The list above ranks Y Combinator-backed Developer tools companies by current headcount, drawn from public LinkedIn and Crunchbase records. 1,191 matching companies in our index give you a quick read on where Y Combinator has gone deepest in the Developer tools space.
Y Combinator’s Developer tools bets tend to share a thesis. The engineers, ML researchers, and founders inside these companies are often building the same primitives - and they show up in Developer tools talent pools across the next decade.
Refolk converts this list into a live search. Ask for “Y Combinator Developer toolscompanies hiring senior engineers” or “founders of Y Combinator-backed Developer toolscompanies” and Refolk returns a fresh ranked shortlist.
How this list is built
Last refreshed: Sun, 21 Jun 2026 08:18:44 GMT
Need a more specific search?
Refolk runs natural-language searches across LinkedIn, GitHub, and the open web. Try one of these:
Related lists
- Y Combinator · SaaS
- Y Combinator · Fintech
- Y Combinator · AI
- Sequoia Capital · Developer tools
- Lightspeed Venture Partners · Developer tools
- Andreessen Horowitz · AI
- Andreessen Horowitz · Fintech
- Andreessen Horowitz · Blockchain
See all company lists.