YCombinator Spring 2026 Startup Database

Dispatch

Builds return satellites for in-space manufacturing payloads.

Hedge

Automates wholesale specialty insurance placement for retail brokers

Surtr Defense Systems

Fuses counter-UAS sensors and effectors into an open defense OS.

Korso

AI agents that execute manufacturing back-office workflows.

Klarify

Turns therapy sessions into notes, plans, claims, and client context.

Primitive

Programmatic email infrastructure for autonomous agents.

Stage

Turns pull requests into AI-structured review chapters.

Standard Signal

AI researches and executes hedge fund trades.

PerfectBit

Builds verifier-grounded training data for frontier AI labs

WithAI

Builds fund-specific AI command centers for asset managers.

Replicas

Runs coding agents in real dev environments for engineering teams.

Totalis

Parlay RFQ and settlement layer for prediction markets.

Rudus

AI takeoffs and bid outputs for concrete subcontractors.

Scope

Simulates how AI agents find and use software products.

Lightsprint

Lets teams turn product requests into agent-built pull requests.

Matforge

AI scientists for semiconductor materials discovery.

Saffron

Scores engineers by observing real AI-assisted coding work.

Chert

Send and automate trusted iMessage conversations at scale.

Nine Fives

Networked RF test equipment that works without driver installs.

Andustry

AI-native broker for industrial machinery and supplier sourcing.