YC Winter 2025 B2B Startups

Y Combinator's Winter 2025 batch included 105 B2B startups. Of these, 104 remain active, 0 have been acquired, and 1 have shut down.

• Sherpa Labs (2 people) — The AI Data Team
• ZeroEntropy (6 people) — Artificial Specialized Intelligence
• Onlook (4 people) — Cursor for Designers
• Invo (1 people) — infra for computer use agents
• Calltree (14 people) — Enterprise-grade AI support reps for call centers
• YouShift (10 people) — The OS for hospital workforce management
• Promptless (5 people) — An AI teammate that automatically updates your customer-facing docs
• Macadamia (2 people) — AI Agents for Complex Engineering Projects
• Corsair (2 people) — Connect your users to their apps
• Quantstruct (2 people) — AI documentation engineer – test & autoimprove stale product docs
• Outship (3 people) — Hire amazing engineers by seeing how they use AI
• Vetnio (6 people) — AI Copilot that automates admin work for veterinary professionals
• Leaping AI (11 people) — AI voice and texting agents
• awen (6 people) — awen translates intent into exceptional visuals through conversation
• Subtrace (2 people) — Zero code network tracer
• superglue (4 people) — AI that fixes enterprise glue
• Serno (2 people) — Custom AI experts that map what one AI can't
• Sublingual (2 people) — Daily productivity tracker
• Contrario (15 people) — AI hiring platform powered by expert recruiters
• Rocketable (2 people) — The AI Maximalist Software Holding Company
• Verbiflow (2 people) — Outbound Sequencing Infrastructure for Startups
• Altrina (4 people) — The SOP Automation Platform
• a0.dev (3 people) — We make mobile apps using AI.
• Weave (14 people) — AI to understand engineering work
• Maive (2 people) — AI for Home Services
• Paragon (2 people) — The AI Growth Engine for Industrials
• SalesPatriot (15 people) — AI powered operating system for distributors and OEMs
• Adam (4 people) — AI Powered CAD
• Osmosis (6 people) — Reinforcement Learning (RL) for AI Agents
• Operand (8 people)
• Cuckoo Labs (2 people) — Real-time AI translator for global sales and marketing
• hud (15 people) — Platform for building RL environments and evals
• Olive (2 people) — Curated stories, every day
• Lopus (2 people) — Headless Data Team
• Lucidic AI — Reimagining how Machines Learn
• Trata (6 people) — AI-powered research desk for hedge funds
• Candor (3 people) — Insider Threat for the Modern Enterprise
• Solidroad (6 people) — AI agents for CX teams, starting with training and QA.
• Bystreet (4 people) — Your partner for hotel ownership data.
• Riviera (2 people) — AI Employees for Hotels
• Confident AI (7 people) — The LLM Eval and Observability Platform for AI Quality
• Exla (2 people) — An SDK to run transformer models anywhere
• Outlit (2 people) — Customer Context for Agents
• Sennu AI (2 people) — We turn traditional companies into AI companies
• OpenIntake (2 people) — The AI Front Door For Law Firms
• Artificial Societies (6 people) — We build networks of AI personas that simulate stakeholder opinions
• AfterQuery (30 people) — Applied research lab curating data solutions for foundation model…
• Pinch (3 people) — Real-time AI Voice Translation for Developers
• Optifye.ai (8 people) — AI performance monitoring for factory workers
• Roark (3 people) — Test, monitor, and improve your voice agents
• Stamp (1 people) — The AI Secretary for Email and Calendar.
• Rebolt (3 people) — AI-Powered Company OS
• Dalus (3 people) — AI-Powered Hardware System Design Software
• Bluebook (4 people) — AI for accounting
• Butter (2 people) — Embedded Sandboxes for Agents
• Ergo — AI agents and unified data layer for revenue teams
• Browser Use (7 people) — Leading open-source web agent project with 50k stars in 3 months
• Cedar (2 people) — Execute the best sales playbook in industry
• SAMMY Labs (10 people) — Computational Law
• TrainLoop (6 people) — Reasoning Fine-Tuning