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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.

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Built from a search like: “Y Combinator-backed Developer tools companies”

Ranked by current headcount across Y Combinator-backed Developer tools companies. Refreshed daily.

  1. 1
    DoorDash· San Francisco, California, United States
    • Post-IPO debt
    • 80.7k employees
    • Founded 2013
  2. 2
    Airbnb· San Francisco, California, United States
    • Post-IPO debt
    • 68.6k employees
    • Founded 2007
  3. 3
    Instacart· San Francisco, California, United States
    • Private equity
    • 24.8k employees
    • Founded 2012
  4. 4
    Twitch· San Francisco, California, United States
    • Series C
    • 14.7k employees
    • Founded 2011
  5. 5
    Café (YC S21)· New York, New York, United States
    • Pre-seed
    • 13.2k employees
    • Founded 2020
Reveal 1,186 more·100 free credits, no card

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

Refolk pulled Developer tools companies whose disclosed Crunchbase investor list includes Y Combinator, ranked them by current employee count, and kept those with at least 5 employees. The list refreshes once a day.

Last refreshed: Sun, 21 Jun 2026 08:18:44 GMT

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