YC Summer 2026 (S26)
230 companies Y Combinator lists for Summer 2026, with what each one builds. 74.1% of the tagged companies are AI.
- Companies
- 230
- AI share
- 74.1%
- Top sector
- Infrastructure
- 25 companies
- Second
- Manufacturing and Robotics
- 24 companies
What’s in Summer 2026
Summer 2026 lists 230 companies so far (X26 had 193). The biggest themes by YC's tags are Robotics (28), Hard Tech (27), Developer Tools (23), Hardware (22) and Infrastructure (18). The largest sectors are Infrastructure, Manufacturing and Robotics, Engineering, Product and Design and Defense. 5.7% are based outside the US.
- Robotics · 28
- Hard Tech · 27
- Developer Tools · 23
- Hardware · 22
- Infrastructure · 18
See what YC asked founders to build · Breakout themes across batches
All Summer 2026 companies
230 companies
- 6thSense
Nervous System for Physical AI
Manufacturing and Robotics4San Francisco, CA, USA - 83 SciencesAI
AI-native materials discovery powered by unpublished experimental data
Industrials3San Francisco, CA, USA - Aerogen Systems
Modernizing Chip Manufacturing Infrastructure
Industrials4Ann Arbor, MI, USA - Agency Tool Company
Reliable infrastructure to build, deploy and manage real-world robots.
Manufacturing and Robotics3Denver, CO, USA - Agentcard
let agents buy anything online
Fintech4San Francisco, CA, USA - Agnost AIAI
We find where AI agents fail, then train better models to run them.
Analytics2San Francisco, CA, USA - Akon LabsAI
Databricks for Enterprise Codebases
B2B2San Francisco, CA, USA - Aktoria Robotics
Human as API for robots
Manufacturing and Robotics2San Francisco, CA, USA - Alkera AIAI
Reliable and safe data engineering and data science agents
Engineering, Product and Design3San Francisco, CA, USA - Allia HealthAI
AI-Native Medical Group for Mental Health
Healthcare Services3San Francisco, CA, USA - AllooviumAI
The company brain for construction companies
Construction5San Francisco, CA, USA - AlmanacAI
Organizing company knowledge
B2B3San Francisco, CA, USA - Amorphic LabsAI
OpenRouter for Agent Tools
Engineering, Product and Design2San Francisco, CA, USA - Applied Electrodynamics, Inc.
A new kind of camera that can see through walls.
Industrials5San Francisco, CA, USA - ArbitalAI
The social trading app for stocks, memes, and perps
Consumer Finance3San Francisco, CA, USA - ArchalAI
API sandboxes, built for AI agents
Infrastructure2San Francisco, CA, USA - AssembleAI
Autonomous IT Delivery
B2B4San Francisco, CA, USA - AsyncAI
AI agents that run small businesses
B2B2New York City, NY, USA - Atlas DiscoveryAI
AI-native pharma company
Drug Discovery and Delivery3San Francisco, CA, USA - AtliaAI
The AI-native property management company for short-term rentals
Housing and Real Estate2San Francisco, CA, USA - Atomarine
Floating nuclear powered data centers at sea.
Energy2San Francisco, CA, USA - AudunAI
AI-native debt collection company
Fintech5Oslo, Oslo, Norway - Autoresearch, Inc.AI
Autoresearch as a service: we solve your hardest measurable problems
Infrastructure3San Francisco, CA, USA - Avoca Systems
The AI operating system for radiology networks
Healthcare6San Francisco, CA, USA
Source: Y Combinator’s public company directory. Each company links to its YC profile. See how we count and what YC asked founders to build.