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YC S26 companies (Summer 2026)

All 227 companies in Y Combinator's Summer 2026 batch, 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
4 roles
BernardS26
  1. 2Nori3
  2. 3Hop Aero2
See all 10
Fastest growingteam, 6 months
+167%
UltrasoniumS26
  1. 2Care GP+45%
  2. 3Avoca Systems+38%
See all 8
Raised the mostlast 12 months
$11M
Hop AeroS26
  1. 2Robocurve$10M
  2. 3OpenRelay$9.8M
See all 12
Companies
227
Active
226
Hiring, last 60 days
10
Open roles, 60 days
18
People on these teams
938
Showing 50 of 227 companies
CompanyTeam6 mo12 moOpen rolesTotal raisedLast round
We are building an AI-native telemedicine clinic for addiction. 🌻
71+18%+73%1$1.5MSeed (before YC)$1.5M, Oct 2025
AI-Native Medical Group for Mental Health
26  YC$2MSeed$2M, Sep 2026
Agentic OS for e-commerce operations
18+29%+125%YC$500KYC investment$500K, Sep 2026
Metal manufacturing, faster, cheaper, and more versatile.
16+167% 0
AI agents to run primary healthcare operations
16+45%+100%0$500KYC investment$500K, Jun 2026
Rocket cargo delivery to contested environments
16+23%+33%2$11MSeed$11M, Sep 2026
The training data R&D engine for physical AI
15  0
Autonomous construction on Earth and beyond
15+15%+50%2$4.5MYC investment$500K, Aug 2026
Watch and create anime
13  YC
AI engineer that debugs and fixes production incidents in realtime
12−8% 0$1.5MSeed (before YC)$1.5M, Dec 2022
The AI operating system for radiology networks
11+38% 0$500KYC investment$500K, Sep 2026
AI employees that run home appliance repair companies
10  4
Network for Physical AI Data Business
10+25%+100%1
Grok bot for GTM & Revenue teams
10−17% 0
AI collections agency for late stage portfolios
9−10%+29%0
AI career agent that finds matching jobs & applies on your behalf
8  YC$500KYC investment$500K, Apr 2026
Autonomous offensive security agents. The best defense is offense
8  0
Nervous System for Physical AI
8  0$657KPre-seed$657K, Jul 2026
Modernizing Chip Manufacturing Infrastructure
8−11% 0$500KYC investment$500K, Jun 2026
Making Diamond Semiconductors
7  0
Autonomous AI defense system for cyber attack
7  0$500KYC investment$500K, Jul 2026
We turn waste gases into supply-secure chemicals
7+17%+17%0
Web data API for agents
7  0$500KYC investment$500K, May 2026
AI-native procurement services for the physical economy
7  0$1MPre-seed$1M, Jun 2026
Superintelligence for Infrastructure
6  YC
The AI-native trading company: factory prices, delivered, one number
6+20% 0
The AI BPO for financial servies, run by computer-use agents
6  0
OpenRouter for Voice AI: one API, every call on the best speech model
6  YC
Fully automated growth for small business
6  YC$500KYC investment$500K, Jul 2026
Building Products and Datasets for Frontier Models
6  0
AI-native debt collection company
60%0%YC$500KYC investment$500K, Aug 2026
Supply chain compliance and cost savings
6−40%−50%0$20KGrant (before YC)$20K, Mar 2025
LinkedIn for agents
6  YC$500KYC investment$500K, Jun 2026
Local creators for local businesses
6  YC
Agentic procurement & inventory for deep tech teams.
60%0%0
Agentic data layer for manufacturing & process industries.
6  YC$700KPre-seed$700K, Jul 2026
AI Brokers for Industrial Trade
6  0$1.1MPre-seed$1.1M, Jun 2026
AI-native materials discovery powered by unpublished experimental data
6  YC$500KYC investment$500K, Jul 2026
Advancing model capabilities for critical infrastructure
6  0$500KYC investment$500K, Sep 2026
Autonomous rovers to make the ‘Google Maps’ of underground utilities
6  0$500KYC investment$500K, Mar 2026
Autonomous IT Delivery
5  0
The robot workforce for infrastructure of the AI era
5  0
AI-native pharma company
5  0$500KYC investment$500K, Jul 2026
We help lawyers start and scale AI-native law firms.
5  0
USA-made magnetics for robotics and defense.
5  0$500KYC investment$500K, Aug 2026
Making Defense Manufacturing Faster and Cheaper
5  YC
The company brain for construction companies
5  0$620KYC investment$500K, Jul 2026
Agentic Hotel Operating System
5  0
CrowdStrike for AI Agents
5  0$700KPre-seed (before YC)$700K, May 2026
AI-native learning for every school
5  YC

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 S26 companies

How many YC S26 companies are there?

227 companies were in Y Combinator's Summer 2026 batch (S26); 226 are active.

Which YC S26 companies are hiring?

10 companies posted roles in the last 60 days, led by Bernard (4 roles), Nori (3 roles) and Hop Aero (2 roles). 47 mark themselves as hiring on YC's directory.

Which YC S26 companies are growing fastest?

By team growth over 6 months (10+ people): Ultrasonium (+167%), Care GP (+45%) and Avoca Systems (+38%).

Which YC S26 companies raised the most?

Largest latest rounds in the last 12 months, after their YC batch: Hop Aero ($11M), Robocurve ($10M) and OpenRelay ($9.8M).

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