Aviator
Hiring
What they do:
Google-level engineering productivity suite
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HQ: San Francisco, CA, United States
Y Combinator Summer 2021 Startups
This list has 391 startups and was last updated on Oct 15, 2026. 86 of them are hiring right now. Biggest hubs: San Francisco (100), New York (36), and London (19). Largest teams: LemFi, ShipBlu, and Yummy. Latest round: Onebrief raised $151M (Oct 14, 2026).
391 startupsPage 6 of 11
Rivia.AI
Hiring
What they do:
Interactive Product Demos
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What they do:
The Trading Terminal For Crypto Traders
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HQ: Austin, TX, United States
What they do:
The AI workforce for freight dispatch
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HQ: San Francisco, CA, United States
SigmaOS
Hiring
What they do:
The new home for your internet 🏡
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HQ: San Francisco, CA, United States
What they do:
Automated communication between hospitals and patients in Latam
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What they do:
We help nurses in nursing homes to be 30% more effective
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HQ: Delft, Netherlands
What they do:
AI-driven mobile cybersecurity
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HQ: Nicosia, Cyprus
Protex AI
Hiring
What they do:
Computer vision that makes the industrial workplace, safer
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HQ: Limerick, Ireland
What they do:
Plan and review AI generated code
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HQ: London, United Kingdom
What they do:
Patent-pending enzymes to break down common dietary triggers
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HQ: Boston, MA, United States
What they do:
AI-powered Application Control
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HQ: San Francisco, CA, United States
What they do:
Abhi is Pakistan's 1st financial wellness platform focusing on…
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HQ: Sindh, Pakistan
What they do:
Your Workplace Engagement Hub
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Lightly
Hiring
What they do:
Help ML teams label the right data
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HQ: Zürich, Switzerland
What they do:
Pipekit scales data & CI pipelines for enterprises
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HQ: Remote
Hyperbrowser
Hiring
What they do:
Web infra for AI agents
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HQ: San Francisco, CA, United States
What they do:
Noom for Southeast Asia
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Akute Health
Hiring
What they do:
The medical record & infrastructure stack for digital health companies
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HQ: Austin, TX, United States
What they do:
Advanced Contract MFG for fast moving hardware companies
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HQ: Fort Worth, TX, United States
What they do:
We enable FMCG distributors in Africa buy inventory on credit
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What they do:
Monetization platform for character creators
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HQ: Los Angeles, CA, United States
What they do:
Portable cryoablation to prevent cervical cancer
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HQ: San Francisco, CA, United States
What they do:
Apps to control technology addictions/ helping startups hire engineers
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What they do:
Private workspace for founders, investors, and advisors to collaborate
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HQ: New York, NY, United States
What they do:
24/7 video platform & online community for students to study together
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HQ: London, United Kingdom
What they do:
Cloud and Container Security Platform
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HQ: San Francisco, CA, United States
What they do:
Manage your website from your favorite tools like Airtable and Notion
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HQ: St. Petersburg, FL, United States
What they do:
Multi-targeted therapeutics to treat complex diseases
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HQ: New York, NY, United States
What they do:
Software that increases the value of oil & gas wells
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Hirebolt
Hiring
What they do:
AI engineering capacity. Made simple. ⚡️
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HQ: London, United Kingdom
What they do:
Automation for dental clinics and insurance companies.
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HQ: Singapore
What they do:
Surgical robotics for every operating room
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What they do:
Programmable biology company for psychoactive effect design
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HQ: San Francisco, CA, United States
What they do:
Automating procurement and finance for construction companies
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HQ: New York, NY, United States
What they do:
AI for product formulation
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HQ: San Francisco, CA, United States