215 Y Combinator companies based in London, with team size, growth, open roles and funding.
Updated weekly, last on November 9, 2026. Roster from Y Combinator's public directory.
| Company | Batch | Team | 6 mo | 12 mo | Open roles | Total raised | Last round |
|---|---|---|---|---|---|---|---|
Making diverse, high-quality data easily available to anyone, anywhere | S19 | 1,580 | +14% | +72% | 19 | $33.5M | Series A$32.3M, Jul 2023 |
We’re building the world’s bank payment network. | S11Acquired | 862 | +1% | +2% | 0 | $529M | Series G$312M, Feb 2022 |
AI-powered Language Operations platform | W14Acquired | 655 | −1% | −5% | 0 | $112M | Undisclosed round$21M, Dec 2023 |
Fair, simple and accessible financial services | S21 | 480 | +4% | +15% | 2 | $86.8M | Corporate round$53M, May 2026 |
The global financial platform for affluent consumers in the Americas. | S21 | 277 | +49% | +147% | 24 | ||
The AI for Financial Services. | W24 | 263 | +49% | +217% | 5 | $87.5M | Undisclosed round$75M, Aug 2026 |
Cross-Border Payments and FX Simplified | W19 | 258 | −3% | +5% | 15 | $12.3M | Grant$100K, Oct 2024 |
The data layer for physical AI | W21 | 231 | +31% | +75% | 3 | $110M | Series C$60M, Feb 2026 |
Single account to manage money across the world | W22 | 224 | +1% | +31% | 1 | $94.3M | Series B$53M, May 2025 |
Headstart uses Machine Learning to help companies decide on who to… | S17Acquired | 220 | −2% | −2% | 0 | $16.6M | Seed$5M, Sep 2019 |
A B2B marketplace for wholesale second hand fashion | W22 | 203 | +8% | +7% | 2 | $46M | Series B$25M, Jul 2026 |
Where Single Muslims meet | S17 | 187 | +2% | +10% | 2 | $10.9M | Series A$7M, Jan 2024 |
Vertical AI agents running B2B outbound on autopilot, with human SDRs | X25 | 140 | +77% | +724% | 0 | $6.2M | Seed$6.2M, Sep 2025 |
Building the Operating System for B&M Retail using Deep Learning | W16 | 131 | +3% | +2% | 33 | $41.9M | Series B$25.9M, Nov 2021 |
All-in-one workspace for companies making regulated products | S20 | 124 | +19% | +57% | YC | ||
An online guide that tells talented graduates how to maximise the… | S15 | 121 | +32% | +78% | 0 | $120K | YC investment$120K, Aug 2015 |
Rebuilding data in advertising to protect privacy | S14 | 108 | −3% | 1 | $105M | Series C$75M, Nov 2021 | |
Growth through always‑on consumer understanding | S24 | 103 | +54% | +472% | 9 | $55.8M | Series A$50M, Sep 2026 |
Helping businesses in emerging markets make pay their international… | S23 | 102 | +13% | +67% | YC | $18M | Series A$18M, Feb 2025 |
AI-Native CPQ & Billing for Modern Pricing Models | S23 | 83 | +9% | +20% | YC | $4.5M | Seed$4M, Sep 2025 |
Inventory management SaaS for Retail & Consumer brands | S22 | 77 | −5% | −13% | 0 | $21.2M | Series A$16.9M, Oct 2024 |
Compliance and back office workflows for Wealth Managers. | S24 | 76 | +15% | +49% | 1 | $17.7M | Series A$17.2M, Oct 2025 |
The online company that gets everyone offline | W18 | 76 | −3% | −16% | 0 | $81.4M | Series B$60M, Jun 2022 |
API for at-home health data | W20 | 74 | +37% | +72% | 5 | $18.6M | Series A$18M, Mar 2025 |
AI patent drafting, prosecution, litigation and more for legal teams. | S23 | 72 | +33% | +125% | 3 | $55M | Series B$40M, Dec 2025 |
The complete toolkit to sell travel. | S18 | 66 | 0% | +16% | 5 | $56.2M | Series B$30M, Oct 2019 |
On-Demand Electronics Manufacturing | W12 | 66 | +14% | +32% | 8 | $46.4M | Series A$28M, May 2026 |
Shopify for experiences | S18 | 65 | +7% | −2% | 1 | $59.6M | Series A$10M, Oct 2026 |
Trusted $€£ accounts abroad for people from unstable economies. | S22 | 63 | +31% | +57% | YC | $22M | Non-equity support$18M, Sep 2026 |
Revolutionising the way travellers discover, plan and book a trip | W15 | 63 | −3% | −5% | YC | $120K | YC investment$120K, Mar 2015 |
AI-Powered HRIS for high performing teams | W21 | 61 | +13% | +17% | 2 | $20M | Series A$15M, Oct 2022 |
Deliver on the Promise of Design | S15 | 61 | −21% | 0 | $1.4M | Seed$1.2M, Jul 2016 | |
RNA medicines for liver diseases | W20 | 59 | −2% | −8% | 0 | $39.8M | Series A$30M, Oct 2022 |
AI-Powered Infrastructure for Insurance & Healthcare | W22 | 58 | −15% | −15% | YC | $4.1M | Seed$3M, Aug 2025 |
Essentials delivered in 30 minutes. | S20Acquired | 56 | 0% | +2% | 0 | $5.1M | YC investment$125K, Aug 2020 |
The design system layer for coding agents | S19 | 56 | −5% | −2% | 0 | $11.2M | Series A$10M, Aug 2021 |
Bits is a credit card designed to help people build credit | S20 | 50 | +6% | 1 | $258K | YC investment$125K, Aug 2020 | |
Robotic human cell manufacturing | S18 | 49 | +7% | 4 | $20.8M | Series A$19M, Nov 2023 | |
Speed up non-coding tasks for engineering teams | W20 | 48 | +4% | +9% | 0 | $47.6M | Series B$30.1M, Sep 2024 |
Helping creators monetize | W19 | 47 | +7% | −8% | 0 | SeedJan 2022 | |
Navigating patients to the right place, first time. | S23 | 46 | +10% | +28% | 5 | $3.9M | Seed$3.4M, Jul 2024 |
Carbon markets platform and solutions | S21 | 44 | −6% | +2% | 0 | $16.6M | Series A$13.5M, Apr 2023 |
Create video by chatting to AI | S22 | 42 | −9% | −19% | 0 | ||
Fully Agentic SWE | W23 | 40 | +8% | +33% | 8 | $3.5M | Undisclosed round$534K, Jan 2026 |
AI Customer Service Agents for trades and field services | S23 | 39 | +50% | +117% | 1 | $16.4M | Series A$12.9M, Jan 2026 |
AI based Customizable Subscription & Revenue Management Platform | W22 | 39 | −11% | −19% | 0 | $500K | YC investment$500K, Mar 2022 |
The global mobile network for business. | S22 | 37 | +16% | +23% | 0 | $4.4M | Seed$4.2M, Feb 2023 |
AI Document Understanding API | W21 | 37 | 0% | −3% | 0 | $23.3M | Undisclosed round$7M, Mar 2023 |
Banking for businesses | W21 | 37 | −7% | −18% | YC | $3.9M | Seed$3.8M, Jan 2022 |
Models that keep learning | W23 | 36 | −10% | −16% | 0 | $8M | Seed$8M, May 2024 |
Every launched company in YC's public directory, with its batch, status, industry and location. New companies show up the week YC lists them.
Each company is matched to Crustdata by its website. Crustdata adds team size and its change over 6 and 12 months, open roles from job postings, reported funding, and founders' past employers.
Hiring the most counts distinct roles posted in the last 60 days. Growth needs 10+ people today, shrinking 20+ a year ago, so tiny teams do not top the lists. Rebuilt every week.
The numbers on this page come from three Crustdata API calls. Crustdata tags 5,000+ companies with Y Combinator as an investor; swap the filter for any investor, industry or headcount range and track your own list, with founders' work emails one call away.
# 1. every company with Y Combinator as an investor curl https://api.crustdata.com/company/search \ -H "authorization: Bearer $CRUSTDATA_API_KEY" \ -H "x-api-version: 2025-11-01" \ -d '{ "filters": { "field": "funding.investors", "type": "in", "value": ["Y Combinator"] }, "fields": ["basic_info.name", "headcount.total", "headcount.growth_percent", "funding.total_investment_usd"], "limit": 100 }' # 2. open listings per company, last 60 days (limit 0 = counts only) curl https://api.crustdata.com/job/search \ -H "authorization: Bearer $CRUSTDATA_API_KEY" \ -H "x-api-version: 2025-11-01" \ -d '{ "filters": { "op": "and", "conditions": [ { "field": "company.basic_info.company_id", "type": "in", "value": [...] }, { "field": "metadata.date_added", "type": "=>", "value": "2026-08-24" } ]}, "limit": 0, "aggregations": [{ "type": "group_by", "field": "company.basic_info.company_id", "agg": "count" }] }' # 3. the same company filter as a weekly watch: POST /watch/company/search
215 Y Combinator companies are based in London; 169 are active.
32 companies posted roles in the last 60 days, led by Focal Systems (33 roles), ARQ (24 roles) and Prolific (19 roles). 54 mark themselves as hiring on YC's directory.
By team growth over 6 months (10+ people): Balance (+220%), Hirebolt (+100%) and Dayjob (+91%).
Largest latest rounds in the last 12 months, after their YC batch: Model ML ($75M), Encord ($60M) and LemFi ($53M).