34 Y Combinator Startups in London That Are Confirmed UK Visa Sponsors
Y Combinator has funded hundreds of startups with a London presence, and a lot of candidates assume that means they're all fair game for sponsorship.
They're not. Some are registered under a different legal name than their YC listing. Some don't hold a sponsorship licence at all. And a few have gone quiet since being funded.
So we took every London-based YC company and cross-checked its actual registered legal entity against the UK Home Office sponsor register — not just the brand name you see on their website.
What we found
Out of the batch we checked, 34 companies came back as a confirmed, currently active match on the register. That means the legal entity behind the YC company you recognise is genuinely licensed to sponsor visas right now.
We left out anything that was only a "possible" match (a similarly named company that couldn't be confirmed) or that we couldn't find on the register at all — so everything below is one you can act on with confidence.
Here's the full list, with the registered company name, town, team size, industry, and a one-line description of what each one does:
The global financial platform for affluent consumers in the Americas.
Registered as: DolarApp UK Ltd
Town: London
Team size: 100
The next generation care enablement platform
Registered as: Continuum Health Limited
Town: London
Team size: 20
We build networks of AIs to simulate high-value audiences
Registered as: Artificial Societies Ltd
Town: London
Team size: 12
AI Agents to scale AML, KYB and KYC operations
Registered as: Arva AI Ltd
Town: London
Team size: 20
AI property manager for landlords and estate agents
Registered as: Brickwise Labs Ltd
Town: London
Team size: 2
Helping businesses in emerging markets make pay their international suppliers
Registered as: Capi Money UK Ltd
Town: London
Team size: 40
We help companies automate the accounting of their carbon emissions
Registered as: CarbonChain.io Limited
Town: London
Team size: 16
On-Demand Electronics Manufacturing
Registered as: CircuitHub Limited
Town: Petersfield
Team size: 58
Making it easy for insurance companies to process claims
Registered as: Claimsorted Ltd
Town: London
Team size: 20
Coinrule Automates Your Crypto and Stock Investments
Registered as: Coinrule Limited
Town: London
Team size: 7
Fully Agentic SWE
Registered as: Buildt AI Limited t/a Cosine
Town: London
Team size: 12
The complete toolkit to sell travel.
Registered as: Duffel Technology Ltd
Town: London
Team size: 55
AI Customer Service Agents for trades and field services
Registered as: ELYOS ENERGY UK LTD
Town: Kings Langley
Team size: 20
The data layer for physical AI
Registered as: Cord Technologies Limited
Town: London
Team size: 150
Your personalised benefits and engagement platform for global teams
Registered as: Happl Ltd
Town: London
Team size: 11
Navigating patients to the right place, first time.
Registered as: HEALTHTECH 1 LTD
Town: London
Team size: 40
AI-Powered HRIS for high performing teams
Registered as: Humaans Software UK Limited
Town: London
Team size: 48
The AI data analyst for consumer brands
Registered as: LatentSpace AI Ltd
Town: Altrincham
Team size: 3
Automated e2e screenshot testing without writing or maintaining tests
Registered as: Meticulous Ai Limited
Town: London
Team size: 15
Helping corporates achieve Net Zero through tech solutions.
Registered as: Minimum Ltd
Town: London
AI Workspace for Financial Services.
Registered as: ModelML Limited
Town: London
Team size: 80
Where Single Muslims meet
Registered as: Muzz Ltd
Town: Ilford
Team size: 104
Robotic human cell manufacturing
Registered as: Mytos Bio Limited
Town: London
Team size: 26
Making diverse, high-quality data easily available to anyone, anywhere
Registered as: Prolific Academic Ltd
Town: London
Team size: 180
24/7 Global Stock Exchange
Registered as: QFEX International Ltd.
Town: London
Team size: 14
Carbon capture equipment for ships
Registered as: Seabound Carbon Ltd
Town: London
Team size: 18
All-in-one workspace for companies making regulated products
Registered as: Opvia Ltd
Town: London
Team size: 22
AI patent drafting, prosecution, litigation and more for legal teams.
Registered as: Solve Intelligence Limited
Town: London
Team size: 50
AI control layer for welding robots
Registered as: Maihem Ltd
Town: London
Team size: 3
Cross-Border Payments and FX Simplified
Registered as: Vertofx Ltd
Town: London
Team size: 170
Trusted $€£ accounts abroad for people from unstable economies.
Registered as: Masref Ltd t/a Nsave
Town: London
Team size: 20
Vertical AI agents running B2B outbound on autopilot, with human SDRs
Registered as: Throxy Ltd
Town: London
Team size: 55
Marketplace for private chefs
Registered as: Yhangry Limited
Town: London
Team size: 12
33 companies shown · Confirmed active UK sponsors matched against the Home Office register
If you're applying to any of these, use the extension to check their sponsorship history directly on LinkedIn or any job board — so you know exactly which visa routes and roles they've sponsored before you apply.
Check sponsorship history for any of these companies
Our free Chrome extension shows you real GOV.UK sponsorship data for any company and role — right on LinkedIn, Indeed, and every job board.