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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- InvestorY Combinator
- IndustryDeveloper tools
- Matches1,782
Built from a search like: “Y Combinator-backed Developer tools companies”
Ranked by current headcount across Y Combinator-backed Developer tools companies. Refreshed monthly.
- 1DoorDash· San Francisco, California, United States
At DoorDash, our mission to empower local economies shapes how our team members move quickly and always learn and reiterate to support merchants, Dashers and the communities we serve. We are a technology and logistics company that started with door-to-door delivery, and we are looking for team members who can help us go from a company that is known for delivering food to a company that people turn to for any and all goods. DoorDash is growing rapidly and changing constantly, which gives our team members the opportunity to share their unique perspectives, solve new challenges, and own their careers. Our leaders seek the truth and welcome big, hairy, audacious questions. We are grounded in our company values, and we make intentional decisions that are both logical and display empathy for our range of users—from Dashers to Merchants to Customers.
- Post-IPO debt
- 83.2k employees
- Founded 2013
- 2Rappi
Rappi is a Latin-American tech company and the first SuperApp in the region. It was founded in 2015 by Simón Borrero, Sebastian Mejía, and Felipe Villamarin and today is present in 9 countries and more than 200 cities.We are a young Latin American team of technology entrepreneurs with a mission to drive progress in our region through our platform for digital commerce. We know the future of Latin America can be made far brighter with technology that connects people to solutions. For us, Rappi is not just a company... it’s a movement for economic progress.
- Debt
- 15k employees
- Founded 2015
- 3Twitch· San Francisco, California, United States
Twitch is where thousands of communities come together for whatever, every day. Together for streamers. Together for games we love. Together for each other.
- Series C
- 14.5k employees
- Founded 2011
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- 4Café (YC S21)· New York, New York, United States
Café helps enterprises drive collaboration, engagement, and cohesion through real-world interactions.Employees can discover colleagues, coordinate in-person meetings, and manage internal events — all in one platform.By connecting teams across locations and departments, Café boosts productivity, knowledge sharing, and organizational alignment.Make your workforce more connected, engaged, and collaborative ☕️
- Pre-seed
- 14.1k employees
- Founded 2020
- 5Faire· San Francisco, California, United States
Faire is a wholesale technology platform empowering brands and retailers to strengthen the unique character of local communities.
- Secondary
- 10.9k employees
- Founded 2017
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. 1,782 matching companies in Refolk’s 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 tools companies hiring senior engineers” or “founders of Y Combinator-backed Developer tools companies” and Refolk returns a fresh ranked shortlist.
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Last refreshed: Tue, 15 Sep 2026 18:44:19 GMT
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How is this ranking built?
The list draws on the public company graph - headcount and growth signals, funding history, and recency. The criteria chips at the top show exactly which filters produced it, and the methodology section explains the ranking.
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