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YC Infrastructure companies

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.

Hiring the mostlast 60 days
44 roles
FivetranW13
  1. 2Docker38
  2. 3AfterQuery25
See all 39
Fastest growingteam, 6 months
+300%
Mundo AIW25
  1. 2OpenCode+200%
  2. 3Hub+194%
See all 67
Shrinkingteam, 12 months
−59%
ShapedW22
  1. 2Activeloop−23%
  2. 3Dojah Inc−18%
See all 14
Raised the mostlast 12 months
$150M
SupabaseS20
  1. 2Blacksmith$66M
  2. 3Ollama$65M
See all 32
Companies
341
Active
241
Hiring, last 60 days
39
Open roles, 60 days
244
People on these teams
10,354
Showing 50 of 341 companies
CompanyBatchTeam6 mo12 moOpen rolesTotal raisedLast round
The leader in automated data movement
W131,934+5%+13%44$853MDebt$125M, May 2023
Software development platform.
S101,108+7%+20%38$436MSeries C$105M, Mar 2022
The cloud-native, operational database built for speed and scale.
W11565+3%+2%14$464MSeries F$30M, Oct 2022
Build in a weekend. Scale to millions.
S20484+38%+106%0$1.2BSeries F$150M, Oct 2026
The Infrastructure Identity Company
S15329+12%+31%6$169MSeries C$110M, May 2022
Applied research lab curating data solutions for foundation model…
W25286+58%+186%25$30.5MSeries B$30M, Sep 2026
The data layer for physical AI
W21231+31%+75%3$110MSeries C$60M, Feb 2026
Expo brings together the best of web and native app development
S16205+17%+41%0$45.1MSeries B$45M, Apr 2026
Hosted Continuous Integration and Delivery for mobile apps
W17189+3%+6%2$83.5MSeries C$60M, Nov 2021
Powers OTT online video providers with video developer tools.
S15180+8%+10%2$95.3MDebt$3M, Oct 2024
The platform for building and operating time series applications.
W13169 −8%9$201MDebt$30M, Feb 2023
Apollo helps engineering teams accelerate delivery
S11166−2%−13%8$183MUndisclosed round$130M, Mar 2022
Video infrastructure for developers
W16165+1%+9%3$174MSeries D$105M, Apr 2021
Enabling developers to build and run applications in the cloud.
W08Acquired136−8%−14%0$13MSeries B$10M, May 2010
Customer data collection, safeguarding, & activation for healthcare
S19134−7%+14%3$46.9MSeries B$30.7M, Jul 2024
AI Powered Construction Management Software
W22124+22%+36%0
The enterprise platform for AI phone calls
S23123+4%+38%5$106MSeries C$50M, Jun 2026
The best way to build Voice AI apps
S17116+16%+8%7$113MSeries C$50M, Dec 2023
Cortex is the Internal Developer Portal eliminating “developer tax”…
W20115+13%+7%1$113MSeries C$60M, Sep 2024
Infrastructure and tools to build and scale blockchain applications.
W21110+2%−4%YC$102MSecondary$60M, Jan 2024
Turning everyday words and actions into usable training data.
W26100−5%+488%0$31.7MSeed$31.2M, May 2026
Protocol Labs makes internet protocols: IPFS, Filecoin, and more.
S1499−9%−15%0$13.4MUndisclosed round$2.5M, Mar 2024
AI-native on-call and incident response carefully crafted to help…
S2193+22%+27%1$15.2MSeries A$12M, Aug 2023
Get up and running with large language models.
W2177+38%+64%0$80.1MSeries B$65M, Jul 2026
Infrastructure to build reliable agents
S25Acquired74+722%+573%0$500KYC investment$500K, Sep 2025
Open-source, serverless vectordb for production-scale generative AI
W2266+35%+94%9$41MSeries A$30M, Jun 2025
Infrastructure management software for water & electricity companies
S2165 +2%0$36.1MSeries A$17M, Aug 2024
Termii is an AI-native reliability infrastructure company.
W2062+5%+11%0$5.2MNon-equity support$3.6M, Apr 2026
Observability platform to control all of your log data
W1561+2%−8%0$108MSeries D$50M, Dec 2021
Build the software you wish existed.
W2360+9%+25%1$5.5MSeed$5M, Aug 2023
Run full stack apps close to your users.
W2056+8%+4%0$136MSeries D$25M, Jul 2026
Open-source, self-hosted, session replay tool for developers.
S1955−4%−5%0$6.2MSeed$4.7M, Jun 2022
Real-world training data for frontier AI labs and robotics.
X2653+194%+152%YC
Easiest way to deploy on AWS/GCP/Azure
S2053+6%+23%YC$26.6MSeries A$20M, Jan 2026
Ironclad for construction
S2251+6%+13%YC$7MSeed$7M, Oct 2025
Recover from any outage in 10 minutes or less.
W2151+46%+65%0$26.2MSeries A$15.9M, Jun 2026
The multimodal data lab
W2250+52%+178%12$4.1MSeed$4M, Nov 2022
Production-grade unstructured document extraction
S2446+31%+53%2$4.4MSeed$3.9M, Feb 2025
AI-based full stack observability platform
W2346−10%−2%YC$7MSeed$6.5M, Aug 2023
Open source alternative to DataDog
W2146−8%−2%3$6.5MSeed$5.4M, Sep 2023
AI Document Fraud Detection for Banks, Credit Unions & Lenders
S1846+7%+7%2$38.7MSeries B$25M, Jan 2023
The data layer for perceptual intelligence
W2544+300%+450%2$24MSeries A$20M, Aug 2026
Self-hosted data lakehouse platform
W2243+16%+39%1$2.2MSeed$700K, Oct 2024
The API to get recordings, transcripts, and metadata from meetings
W2043+10%+23%3$50.7MSeries B$38M, Sep 2025
AI Time Platform for Law Firms
W2442+100%+320%9$19.6MSeries A$16M, Mar 2026
AI risk and ops platform for Payment Processors, Banks, SaaS…
S2242+5%+11%YC$4.2MSeed$3.7M, Feb 2024
The platform for your visual media.
S1141−5%−5%0$11.2MSeries A$4M, Oct 2016
Building the AI data engine for any modality and scale
W2240+11%+5%2$30MSeries A$20M, Jun 2025
Continuous Deployment at any scale, for all developers.
W17Acquired40  0$82MUndisclosed round$40M, May 2022
Infrastructure for identity and fraud.
W2638+27%+46%0$8.5MSeed$7.5M, May 2026

How this works

1. The roster

Every launched company in YC's public directory, with its batch, status, industry and location. New companies show up the week YC lists them.

2. The numbers

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.

3. The lists

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.

Built with Crustdata. Get your own API key and build your own.

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.

  • Company search for team size, growth and funding
  • Job search with a count by company, for who is hiring and for what
  • A watch that re-runs the search weekly and sends only what changed
# 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

Questions about YC Infrastructure companies

How many YC Infrastructure companies are there?

341 Y Combinator companies are in Infrastructure; 241 are active.

Which YC Infrastructure companies are hiring?

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.

Which YC Infrastructure companies are growing fastest?

By team growth over 6 months (10+ people): Mundo AI (+300%), OpenCode (+200%) and Hub (+194%).

Which YC Infrastructure companies raised the most?

Largest latest rounds in the last 12 months, after their YC batch: Supabase ($150M), Blacksmith ($66M) and Ollama ($65M).

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