YC Winter 2026 Engineering, Product and Design Startups

Y Combinator's Winter 2026 batch included 18 Engineering, Product and Design startups. Of these, 18 remain active, 0 have been acquired, and 0 have shut down.

• Button Computer (1 people) — The tiny computer built for voice AI.
• Valgo (3 people) — Insurance risk layer for physical AI
• shortkit (2 people) — Media infra for consumer apps
• Zatanna (2 people) — Turning all software into agent-first APIs
• Ashr (2 people) — Automated Multi-Modal Testing for Agents
• Reframe (1 people) — AI-native, hardware procurement marketplace
• Canary (2 people) — The first AI QA engineer that understands your code
• Sentrial (2 people) — Datadog for Agent Reliability
• 21st (3 people) — UI building blocks for the agentic internet
• Skillsync (2 people) — Github for agent sessions
• Sparkles (1 people) — Make everyone on your team an engineer
• Approxima (2 people) — Your software should build itself.
• REV1 (2 people) — Claude Code for Mechanical Engineers
• Synthetic Sciences (2 people) — Foundation Models for Scientific Research
• Visibl Semiconductors (2 people) — A faster, lower cost path to custom silicon
• Corelayer (3 people) — AI production engineer for regulated industries
• Aurorin CAD (1 people) — Claude code for Mechanical Engineers
• Martini (2 people) — AI Video Production for Professionals