YC Spring 2025 Engineering, Product and Design Startups

24 Y Combinator Engineering, Product and Design companies from the Spring 2025 batch — with team size, status, and one-liner for every startup.

Total
24
Active
24
Acquired
0
Shut down
0

Y Combinator's Spring 2025 batch included 24 Engineering, Product and Design startups. Of these, 24 remain active, 0 have been acquired, and 0 have shut down.

  • Mesmer (7 people) — The operating system for the 100x Engineering Team
  • Plexe (2 people) — Open-source agents to build predictive ML models from a prompt
  • Vybe (8 people) — Secure internal apps. Built by AI in seconds. Powered by your data.
  • cubic (3 people) — AI-powered code review platform
  • Cua (3 people) — Give every agent a cloud desktop
  • Feyn (3 people) — Custom models trained on your data
  • HelixDB (6 people) — The fastest & most scalable graph-vector database on the market
  • Alpha Research (1 people) — Open source, agentic knowledge bases for all of humanity's knowledge.
  • Attune (3 people) — Faster builds, zero effort.
  • Freesolo (4 people) — Product Native Models
  • StarSling (2 people) — Self-Driving CI
  • Theorem (4 people) — Program verification so even your systems engineers can vibecode
  • Godela (10 people) — AI Physics Engine to replace simulations and prototypes
  • Docket (2 people) — AI agents for web testing
  • Prism (3 people) — Deploy AI Agents with a Single API Call
  • Photonium (4 people) — AI-Powered Optical Consulting & Software
  • Capacitive (2 people) — The data gateway for agents.
  • Jeevy Fabrication (3 people) — AI Driven EPC - Weld Fabrication Contractor
  • Bloom (2 people) — Build and share mobile apps in seconds
  • Human Behavior (3 people) — Understand your users beyond the numbers
  • Partcl — Design a chip in minutes
  • Refresh (8 people) — Training gyms for computer use and software engineering work
  • Alkali (2 people) — The smarter way to estimate steel.
  • Nimbic AI (3 people) — Automatically write and update internal docs with every code commit.

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