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Y Combinator SaaS portfolio in San Francisco

The most prolific seed accelerator in the world, batch class twice a year. Filtered to SaaS companies headquartered in San Francisco.

Built from a search like: Y Combinator-backed SaaS companies in San Francisco

Ranked by current headcount across Y Combinator-backed SaaS companies in San Francisco. Refreshed daily.

  1. 1
    DoorDash· 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
    • 82.4k employees
    • Founded 2013
  2. 2
    Airbnb· San Francisco, California, United States

    Airbnb was born in 2007 when two hosts welcomed three guests to their San Francisco home, and has since grown to over 5 million hosts who have welcomed over 2 billion guest arrivals in almost every country across the globe. Every day, hosts offer unique stays, experiences and services that make it possible for guests to connect with communities in a more authentic way.

    • Post-IPO debt
    • 72.2k employees
    • Founded 2007
  3. 3
    Instacart· San Francisco, California, United States

    Instacart is a leading grocery technology company that partners with more than 2,200 retail banners – representing nearly 100,000 stores – to transform how people shop for the groceries they need from the retailers they trust, while creating flexible earning opportunities for shoppers. Through the Instacart Marketplace, Instacart Enterprise platform, and Instacart Ads ecosystem, the company powers ecommerce, fulfillment, in-store technology, AI offerings, and advertising for partners. With Instacart Health, the company is providing tools to increase nutrition security, make healthy choices easier for consumers, and expand the role that food can play in improving health outcomes. For more information, visit www.instacart.com/company.

    • Private equity
    • 25.2k employees
    • Founded 2012
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  5. 4
    Stripe· South San Francisco, California, United States

    Stripe builds programmable financial services. Millions of companies—from the world’s largest enterprises to the most ambitious startups—use Stripe to accept payments, grow their revenue, and accelerate new business opportunities. Headquartered in San Francisco and Dublin, the company aims to increase the GDP of the internet.

    • Secondary
    • 17k employees
    • Founded 2010
  6. 5
    Twitch· 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
    • 14.9k employees
    • Founded 2011

Y Combinator-backed SaaS companies in San Francisco

The list above ranks Y Combinator-backed SaaS companies headquartered in San Francisco by current headcount, drawn from public LinkedIn and Crunchbase records. With 991 matching companies in Refolk’s index, you can see exactly where Y Combinator’s SaaS thesis has landed in San Francisco.

Three filters - investor, industry, city - narrow the field to a tight cluster of operators with overlapping incentives. They share a thesis, a network, and a market. Hiring from this list usually means hiring someone already inside the Y Combinator SaaS world in San Francisco.

Refolk converts this list into a live search. Ask for Y Combinator SaaS companies in San Francisco hiring senior engineers” or “founders of Y Combinator-backed SaaS companies in San Francisco who left in the last year” and Refolk returns a ranked shortlist.

How this list is built

Refolk pulled SaaS companies headquartered in San Francisco whose disclosed Crunchbase investor list includes Y Combinator, ranked them by current employee count, and kept those with at least 3 employees. The list refreshes once a day.

Last refreshed: Wed, 05 Aug 2026 11:34:49 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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The underlying index updates continuously and this page re-renders at least daily. Last refreshed: Wed, 05 Aug 2026 11:34:49 GMT.

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