YC Spring 2026 Engineering, Product and Design Startups

Y Combinator's Spring 2026 batch included 17 Engineering, Product and Design startups. Of these, 17 remain active, 0 have been acquired, and 0 have shut down.

• Superset (3 people) — The IDE for the AI Agents Era
• Superlog (2 people) — Make software self-healing
• Linzumi (3 people) — Team chat to command all your company's coding agents
• Lamina Labs (2 people) — Near-real-time video infrastructure for LLMs
• Stage (2 people) — Code review platform for humans and agents
• Replicas (2 people) — Run any coding agent harness in the cloud
• Probe (3 people) — Agent-Native Incident Management
• InsForge (6 people) — The agent-native AWS
• Lightsprint (3 people) — Collaborative product development with cloud agents
• Zenbu (1 people) — The extensible IDE for coding agents
• Atrisa (3 people) — AI Agents for Analog Circuit Design
• Oddpool (2 people) — Institutional infrastructure for prediction markets
• Armature (3 people) — Armature builds, monitors and optimizes products' Agent Experience.
• TesterArmy (5 people) — Test your app with AI, catch bugs before users do
• OpenProse (3 people) — An open-source operating system for reliable long-running agents
• Runtime (3 people) — Build and run internal agents, without managing the infrastructure
• Gigacatalyst (4 people) — Let software users build new features with our in-app AI agents