Refolk

Companies funded by Y Combinator

The most prolific seed accelerator in the world, batch class twice a year.

Ranked by current headcount across companies in Y Combinator's disclosed portfolio. 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
    Meesho· Bengaluru, Karnataka, India

    Meesho is India’s e-commerce marketplace, on a mission to democratise internet commerce. Our multi-sided technology platform connects four key stakeholders — consumers, sellers, logistics partners, and content creators — to power inclusive growth at scale. We enable individuals and small businesses to sell online with ease, offering access to a wide customer base, integrated logistics, payment solutions, and platform support. For customers, Meesho offers a broad and affordable selection, tailored for diverse needs across Bharat. We also empower creators to build commerce-driven content that drives discovery and engagement.Our logistics operations are powered by Valmo, Meesho’s asset-light logistics platform that works entirely through partner-led infrastructure to ensure cost-efficient and scalable deliveries.

    • post ipo secondary
    • 24.3k employees
    • Founded 2015
  6. 5
    Aster DM Healthcare· United Arab Emirates

    From a single medical centre to a performance-driven healthcare enterprise spread across more than 400+ medical establishments, including 15 hospitals, 120 clinics and 307 pharmacies in GCC and growing, Aster DM Healthcare has transitioned into being the leading healthcare authority across the Middle East.Currently one of the largest and fastest growing conglomerates in the MENA region, Aster DM Healthcare covers the full spectrum of healthcare services. An expansive portfolio includes hospitals and clinics, pharmacies, diagnostic centres, educational institutions, healthcare management and healthcare support systems.Headquartered in Dubai, the Aster DM network now encompasses more than 19,657 employees( Doctors, Nurses, Others) with JCI accredited clinics and diagnostic centres.Never content to rest on its laurels, Aster DM Healthcare is constantly seeking opportunities to set new yardsticks with advanced developments. With many more innovative and ambitious initiatives, Aster DM Healthcare has radically catalyzed the healthcare revolution across Middle EastEach of the Group’s verticals is a symbol of distinction, driven by the commitment to build a healthier tomorrow and to take healthcare to the next level of excellence.

    • Series B
    • 20.2k employees
    • Founded 2023

Find engineers and founders in Y Combinator’s portfolio

Y Combinator’s portfolio is a curated bet on the next wave of category-defining companies. The list above ranks Y Combinator-backed companies by current headcount, drawn from public LinkedIn and Crunchbase records. With 3,648 matching companies in Refolk’s index, the depth of senior engineers, founders, and operators is significant.

Y Combinator’s companies tend to share a profile - strong technical founders, fresh capital, and access to the Y Combinator network. Hiring from these companies often means hiring from one of the most curated talent pools in tech.

Refolk turns this list into a search. Ask for Y Combinator portfolio companies hiring senior ML engineers” or “founders of Y Combinator-backed companies who left in the last year” and Refolk returns a fresh ranked shortlist.

How this list is built

Refolk pulled 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: Thu, 06 Aug 2026 00:52:25 GMT

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Common questions

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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