341 Y Combinator companies in Infrastructure, 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 |
|---|---|---|---|---|---|---|---|
The leader in automated data movement | W13 | 1,934 | +5% | +13% | 44 | $853M | Debt$125M, May 2023 |
Software development platform. | S10 | 1,108 | +7% | +20% | 38 | $436M | Series C$105M, Mar 2022 |
The cloud-native, operational database built for speed and scale. | W11 | 565 | +3% | +2% | 14 | $464M | Series F$30M, Oct 2022 |
Build in a weekend. Scale to millions. | S20 | 484 | +38% | +106% | 0 | $1.2B | Series F$150M, Oct 2026 |
The Infrastructure Identity Company | S15 | 329 | +12% | +31% | 6 | $169M | Series C$110M, May 2022 |
Applied research lab curating data solutions for foundation model… | W25 | 286 | +58% | +186% | 25 | $30.5M | Series B$30M, Sep 2026 |
The data layer for physical AI | W21 | 231 | +31% | +75% | 3 | $110M | Series C$60M, Feb 2026 |
Expo brings together the best of web and native app development | S16 | 205 | +17% | +41% | 0 | $45.1M | Series B$45M, Apr 2026 |
Hosted Continuous Integration and Delivery for mobile apps | W17 | 189 | +3% | +6% | 2 | $83.5M | Series C$60M, Nov 2021 |
Powers OTT online video providers with video developer tools. | S15 | 180 | +8% | +10% | 2 | $95.3M | Debt$3M, Oct 2024 |
The platform for building and operating time series applications. | W13 | 169 | −8% | 9 | $201M | Debt$30M, Feb 2023 | |
Apollo helps engineering teams accelerate delivery | S11 | 166 | −2% | −13% | 8 | $183M | Undisclosed round$130M, Mar 2022 |
Video infrastructure for developers | W16 | 165 | +1% | +9% | 3 | $174M | Series D$105M, Apr 2021 |
Enabling developers to build and run applications in the cloud. | W08Acquired | 136 | −8% | −14% | 0 | $13M | Series B$10M, May 2010 |
Customer data collection, safeguarding, & activation for healthcare | S19 | 134 | −7% | +14% | 3 | $46.9M | Series B$30.7M, Jul 2024 |
AI Powered Construction Management Software | W22 | 124 | +22% | +36% | 0 | ||
The enterprise platform for AI phone calls | S23 | 123 | +4% | +38% | 5 | $106M | Series C$50M, Jun 2026 |
The best way to build Voice AI apps | S17 | 116 | +16% | +8% | 7 | $113M | Series C$50M, Dec 2023 |
Cortex is the Internal Developer Portal eliminating “developer tax”… | W20 | 115 | +13% | +7% | 1 | $113M | Series C$60M, Sep 2024 |
Infrastructure and tools to build and scale blockchain applications. | W21 | 110 | +2% | −4% | YC | $102M | Secondary$60M, Jan 2024 |
Turning everyday words and actions into usable training data. | W26 | 100 | −5% | +488% | 0 | $31.7M | Seed$31.2M, May 2026 |
Protocol Labs makes internet protocols: IPFS, Filecoin, and more. | S14 | 99 | −9% | −15% | 0 | $13.4M | Undisclosed round$2.5M, Mar 2024 |
AI-native on-call and incident response carefully crafted to help… | S21 | 93 | +22% | +27% | 1 | $15.2M | Series A$12M, Aug 2023 |
Get up and running with large language models. | W21 | 77 | +38% | +64% | 0 | $80.1M | Series B$65M, Jul 2026 |
Infrastructure to build reliable agents | S25Acquired | 74 | +722% | +573% | 0 | $500K | YC investment$500K, Sep 2025 |
Open-source, serverless vectordb for production-scale generative AI | W22 | 66 | +35% | +94% | 9 | $41M | Series A$30M, Jun 2025 |
Infrastructure management software for water & electricity companies | S21 | 65 | +2% | 0 | $36.1M | Series A$17M, Aug 2024 | |
Termii is an AI-native reliability infrastructure company. | W20 | 62 | +5% | +11% | 0 | $5.2M | Non-equity support$3.6M, Apr 2026 |
Observability platform to control all of your log data | W15 | 61 | +2% | −8% | 0 | $108M | Series D$50M, Dec 2021 |
Build the software you wish existed. | W23 | 60 | +9% | +25% | 1 | $5.5M | Seed$5M, Aug 2023 |
Run full stack apps close to your users. | W20 | 56 | +8% | +4% | 0 | $136M | Series D$25M, Jul 2026 |
Open-source, self-hosted, session replay tool for developers. | S19 | 55 | −4% | −5% | 0 | $6.2M | Seed$4.7M, Jun 2022 |
Real-world training data for frontier AI labs and robotics. | X26 | 53 | +194% | +152% | YC | ||
Easiest way to deploy on AWS/GCP/Azure | S20 | 53 | +6% | +23% | YC | $26.6M | Series A$20M, Jan 2026 |
Ironclad for construction | S22 | 51 | +6% | +13% | YC | $7M | Seed$7M, Oct 2025 |
Recover from any outage in 10 minutes or less. | W21 | 51 | +46% | +65% | 0 | $26.2M | Series A$15.9M, Jun 2026 |
The multimodal data lab | W22 | 50 | +52% | +178% | 12 | $4.1M | Seed$4M, Nov 2022 |
Production-grade unstructured document extraction | S24 | 46 | +31% | +53% | 2 | $4.4M | Seed$3.9M, Feb 2025 |
AI-based full stack observability platform | W23 | 46 | −10% | −2% | YC | $7M | Seed$6.5M, Aug 2023 |
Open source alternative to DataDog | W21 | 46 | −8% | −2% | 3 | $6.5M | Seed$5.4M, Sep 2023 |
AI Document Fraud Detection for Banks, Credit Unions & Lenders | S18 | 46 | +7% | +7% | 2 | $38.7M | Series B$25M, Jan 2023 |
The data layer for perceptual intelligence | W25 | 44 | +300% | +450% | 2 | $24M | Series A$20M, Aug 2026 |
Self-hosted data lakehouse platform | W22 | 43 | +16% | +39% | 1 | $2.2M | Seed$700K, Oct 2024 |
The API to get recordings, transcripts, and metadata from meetings | W20 | 43 | +10% | +23% | 3 | $50.7M | Series B$38M, Sep 2025 |
AI Time Platform for Law Firms | W24 | 42 | +100% | +320% | 9 | $19.6M | Series A$16M, Mar 2026 |
AI risk and ops platform for Payment Processors, Banks, SaaS… | S22 | 42 | +5% | +11% | YC | $4.2M | Seed$3.7M, Feb 2024 |
The platform for your visual media. | S11 | 41 | −5% | −5% | 0 | $11.2M | Series A$4M, Oct 2016 |
Building the AI data engine for any modality and scale | W22 | 40 | +11% | +5% | 2 | $30M | Series A$20M, Jun 2025 |
Continuous Deployment at any scale, for all developers. | W17Acquired | 40 | 0 | $82M | Undisclosed round$40M, May 2022 | ||
Infrastructure for identity and fraud. | W26 | 38 | +27% | +46% | 0 | $8.5M | Seed$7.5M, May 2026 |
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
341 Y Combinator companies are in Infrastructure; 241 are active.
39 companies posted roles in the last 60 days, led by Fivetran (44 roles), Docker (38 roles) and AfterQuery (25 roles). 84 mark themselves as hiring on YC's directory.
By team growth over 6 months (10+ people): Mundo AI (+300%), OpenCode (+200%) and Hub (+194%).
Largest latest rounds in the last 12 months, after their YC batch: Supabase ($150M), Blacksmith ($66M) and Ollama ($65M).