YC Winter 2026 B2B Startups

Y Combinator's Winter 2026 batch included 125 B2B startups. Of these, 124 remain active, 0 have been acquired, and 1 have shut down.

• Signals (2 people) — iMessage revenue channel for DTC brands that brings customers back
• Button Computer (1 people) — The tiny computer built for voice AI.
• Pollen (3 people) — AI agents that automate customer success
• Crosslayer Labs (3 people) — Protect, monitor and defend your Internet presence
• Valgo (3 people) — Insurance risk layer for physical AI
• Syntropy (2 people) — The agentic coding app for complex tasks.
• shortkit (2 people) — Media infra for consumer apps
• Cofia (3 people) — AI automations that implement themselves
• Cascade (2 people) — Distilling Proprietary Intelligence
• Envariant (1 people) — Interpretability and reasoning infra for foundation models.
• OpenSpec — Plan mode for complex features
• /dev/fast (4 people) — /dev/fast is the AI-native code forge
• Tepali (2 people) — AI operating system for medspas
• Zatanna (2 people) — Turning all software into agent-first APIs
• Aemon (3 people) — The Forward-Deployed AI Research Engineer
• Ashr (2 people) — Automated Multi-Modal Testing for Agents
• Sponge (3 people) — Financial infrastructure for the agent economy
• Confluence Labs (2 people) — AI models that learn from experience
• IncidentFox (2 people) — AI SRE agent that triages, coordinates, and fixes production incidents
• Cajal (2 people) — Scaling formal verification to accelerate scientific discovery
• Overshoot (5 people) — AI Infra for real-time vision applications
• End Close (2 people) — AI powered reconciliation for high-volume payments companies
• Revion (10 people) — Intelligence for Automotive Operations
• Reframe (1 people) — AI-native, hardware procurement marketplace
• InventoryQuant (1 people) — We automate the inventory process in insurance
• Emdash (2 people) — Open-source Agentic Development Environment
• The Token Company (2 people) — Compression middleware that improves LLM outputs
• Canary (2 people) — The first AI QA engineer that understands your code
• Talking Computers (2 people) — AI for AI Infrastructure
• Polymorph (4 people) — Building the future of the consumer internet
• MochaCare (2 people) — Agentic Management Service for Care Organizations
• Fixture (5 people) — An AI-first CRM built for Startups
• Wideframe (2 people) — AI coworker for video editors to ship more video faster
• Wayco (5 people) — AI operator for medlegal cases
• o11 (2 people) — Bespoke AI For Financial Firms
• Sentrial (2 people) — Datadog for Agent Reliability
• LegalOS (3 people) — The AI-Native Immigration Law Firm
• BaseFrame (2 people) — Detect what AI can automate for your team
• Burt (2 people) — AI teammates for logistics
• Avoice (4 people) — Harvey for Architecture
• Vector Legal (5 people) — A premier AI-native law firm & legal operating system for Startups.
• 21st (3 people) — UI building blocks for the agentic internet
• AutoSitu (2 people) — AI-native workspace for development plan reviews
• Skillsync (2 people) — Github for agent sessions
• MouseCat (2 people) — AI-powered fraud investigations
• Rubric AI (1 people) — Reasoning and verification infra for AI
• Sila (2 people) — Agent-Native Messaging Platform
• Luel (12 people) — Turning everyday words and actions into usable training data.
• Captain (2 people) — Give AI agents accurate knowledge search that scales
• Sparkles (1 people) — Make everyone on your team an engineer
• Payna (2 people) — AI Licensing Agent for Regulated Industries
• Piris Labs (8 people) — The Networking Layer of AI
• Fern (2 people) — RL environments for robotics companies
• Carrot Labs (2 people) — AI Cost Management: Track and attribute AI spend across every provider
• Perfectly (4 people) — The AI-native Recruiting OS
• Orthogonal (2 people) — Agentic Payments for APIs
• Cardinal — Revenue Agents for GTM teams
• Q2Q (2 people) — We help private equity teams find acquisition targets faster
• Compresr (4 people) — LLM context compression for better accuracy
• Unisson (2 people) — AI agents that automate B2B software implementation