YC Spring 2026 Infrastructure Startups

Y Combinator's Spring 2026 batch included 19 Infrastructure startups. Of these, 19 remain active, 0 have been acquired, and 0 have shut down.

• Miso Labs (2 people) — Emotive foundation voice models
• Sazabi (10 people) — The AI-native observability platform for fast-moving engineering teams
• Interfaze (5 people) — AI model built for high accuracy deterministic tasks
• Inth (3 people) — Monitor and fix product privacy issues before they block growth
• smol machines (1 people) — Ship software faster with portable, self contained virtual machines.
• primitive (4 people) — communication for agents
• Ardent (3 people) — Database sandboxes for Agents
• ProjectX (8 people) — Agent native workspace for heavy parallel workflows on the web
• Indexable (3 people) — sandbox infrastructure for AI agents
• KugelAudio (4 people) — Kugel is an on-prem Voice AI model supporting 30+ languages
• Limrun (1 people) — Extend cloud sandboxes with iOS, Android and more
• Minicor (7 people) — Scalable windows desktop automations
• Zibra Labs (2 people) — Distributed runtime for AI workloads at scale
• Wato (2 people) — The control point for AI agents at work.
• Memory Store (4 people) — Company Brain.
• Expanse (4 people) — Unlock wasted GPU capacity.
• AgentPhone (2 people) — Phone Numbers for AI Agents
• Hub (10 people) — Real-world training data for frontier AI labs and robotics.
• Dreach (2 people) — stop building lists. start booking clients.