Industry

YC Engineering, Product and Design Companies

610 Y Combinator engineering, product and design startups with verified founder contacts, batch info, and company data.

610

Companies

480

Active

Acquired

Public

YC Company Directory

50 companies

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Company	Batch	Description	Status	Location	Team	Founders	Reveal
Cedar	W25	The open source copilot for any app	Active	—	2	Jesse Li, Isabelle Ilyia	Reveal
Confident AI	W25	The LLM Eval and Observability Platform for AI Quality	Active	San Francisco, CA, USA	7	Jeffrey Ip, Kritin Vongthongsri	Reveal
Corsair	W25	The TypeScript Integration ORM	Active	New York, NY, USA	2	Dev Jain	Reveal
Dalus	W25	AI-Powered Hardware System Design Software	Active	—	3	Sebastian Völkl, Eliot Khachi	Reveal
Delineate	W25	Agents for Accelerated Clinical Trial Design	Active	Boston, MA, USA; Remote	20	Emily Nieves, Jawad Iqbal	Reveal
hud	W25	Platform for building RL environments and evals	Active	San Francisco, CA, USA	15	Jay Ram, Lorenss Martinsons, Parth Patel	Reveal
hud	W25	Platform for building RL environments and evals	Active	San Francisco, CA, USA	5	Jay Ram, Lorenss Martinsons	Reveal
Macadamia	W25	AI Agents for Complex Engineering Projects	Active	Ghent, Flanders, Belgium	2	Abel Van Steenweghen, Brecht Pierreux, Abel Van Steenweghen	Reveal
Mastra	W25	The Javascript framework for building AI agents, from the Gatsby devs	Active	San Francisco, CA, USA; Remote	30	Sam Bhagwat, Abhi Aiyer, Shane Thomas	Reveal
Oki	W25	Personalized Updates on Company Progress	Active	San Francisco, CA, USA	2	Luofei Chen, Aayush Tyagi	Reveal
Onlook	W25	Cursor for Designers	Active	San Francisco, CA, USA	4	Daniel Farrell	Reveal
Peppr AI	W25	Self-improving knowledge base synthesizing scattered company data	Active	—	4	Sachitt Arora, Nitya Arora	Reveal
Promptless	W25	An AI teammate that automatically updates your customer-facing docs	Active	San Francisco, CA, USA	5	Prithvi Ramakrishnan, Frances Liu	Reveal
ReJot	W25	We turn complex API integrations into drop‑in full‑stack libraries	Active	Amsterdam, NH, Netherlands	2	Wilco Kruijer, Jan Schutte	Reveal
Stillwind	W25	Electrical Engineering Components Compaion	Active	Zürich, ZH, Switzerland	3	Linus Meierhöfer, Lukas Ego, Hannes Furmans, Josef Zoller	Reveal
Subtrace	W25	Zero code network tracer	Active	San Francisco, CA, USA	2	Adhityaa Chandrasekar, Sachin Sridhar	Reveal
superglue	W25	AI that fixes enterprise glue	Active	San Francisco, CA, USA	4	Adina Goerres, Stefan Faistenauer	Reveal
TrainLoop	W25	Reasoning Fine-Tuning	Active	San Francisco, CA, USA	6	Jackson Stokes, Mason Pierce	Reveal
Trim	W25	A foundation model for physics.	Active	San Francisco, CA, USA	3	Emanuel Gordis	Reveal
Truffle AI	W25	AWS for AI Agents	Active	Bengaluru, KA, India	2	Shaunak Srivastava, Rahul Karajgikar	Reveal
Truffle AI	W25	AWS for AI Agents	Active	San Francisco, CA, USA	2	Shaunak Srivastava, Rahul Karajgikar	Reveal
Weave	W25	AI to understand and then route engineering work	Active	San Francisco, CA, USA	14	Adam Cohen, Andrew Churchill	Reveal
Wildcard	W25	AEO/GEO for E-Commerce and Retail	Active	San Francisco, CA, USA	—	Kaushik Mahorker	Reveal
Autosana	S25	AI agents for E2E testing across mobile & web	Active	San Francisco, CA, USA	5	Yuvan Sundrani, Jason Steinberg	Reveal
bitrig	S25	Vibe code, test, and deploy Swift apps. All from your iPhone.	Active	—	3	Kyle Macomber, Tim Donnelly, Jacob Xiao	Reveal
BootLoop	S25	Firmware in minutes, not months - rigorously tested on real hardware	Active	San Francisco, CA, USA	3	Noah Pacik-Nelson, Chris Markus, Christopher Markus	Reveal
Cactus	S25	Tiny Edge AI For Tiny Devices	Active	San Francisco, CA, USA	8	Roman Shemet, Henry Ndubuaku	Reveal
Cyberdesk	S25	Self learning computer use agent for developers	Active	San Francisco, CA, USA	2	Mahmoud Al-Madi, Alan Duong	Reveal
Cyberdesk	S25	Self learning computer use agent for developers	Active	San Francisco, CA, USA	2	Mahmoud Al-Madi, Alan Duong	Reveal
datafruit	S25	AI DevOps Engineer	Active	San Francisco, CA, USA	4	Venkat Arun, Abhiram Chennupati, Tom Jeong, Nick Papciak	Reveal
Embedder	S25	Cursor for Firmware	Active	San Francisco, CA, USA	4	Ethan Gibbs, Bob Wei	Reveal
Embedder	S25	Hardware-Aware AI for Embedded Software Development	Active	San Francisco, CA, USA	6	Ethan Gibbs, Bob Wei	Reveal
F2	S25	The AI platform for private markets investors	Active	New York City, NY, USA	15	Don Muir	Reveal
Floot	S25	The app platform inside Claude and ChatGPT.	Active	San Francisco, CA, USA	4	Yujian Yao, Edward Look	Reveal
Fluidize	S25	Helping scientists and engineers run experiments with AI.	Active	San Francisco, CA, USA	3	Henry Bae, Alex Fleury, Jamin Liu	Reveal
Hera	S25	AI Motion Designer	Active	Berlin, Berlin, Germany	5	Peter Tribelhorn, Chia-Lun Wu	Reveal
Idler	S25	Hill-climb any benchmark, for any model, in any domain.	Active	San Francisco, CA, USA	12	Ivan Chub, Nalu Concepcion, Tony Goss	Reveal
Interfere	S25	Give engineering, product, and design teams insight into unseen issues	Active	New York City, NY, USA	8	Luke Shiels	Reveal
Lark	S25	The E2E testing layer for AI-driven development	Active	San Francisco, CA, USA	2	Vijit Dhingra, Jack Brown	Reveal
Monte	S25	Continual Learning for Agents	Active	San Francisco, CA, USA	3	Henry Bae, Alex Fleury, Jamin Liu	Reveal
Nozomio	S25	Context augmentation for agents	Active	—	1	Arlan Rakhmetzhanov	Reveal
Omnara	S25	The Open-Source Alternative to Claude Managed Agents	Active	San Francisco, CA, USA	4	Ishaan Sehgal, Kartik Sarangmath	Reveal
Panels	S25	Audio Data for AI Labs	Active	San Francisco, CA, USA	1	Aaron Wenk	Reveal
Panels	S25	Audio Data for AI Labs	Active	San Francisco, CA, USA	2	Aaron Wenk, Jason Le	Reveal
Proliferate	S25	The autonomous engineering organization	Active	San Francisco, CA, USA	2	Pablo Hansen	Reveal
SigmanticAI	S25	The Cursor for Chip Design - Delivering Silicon-Ready Chip Designs…	Active	Dublin, CA 94568, USA	2	Rohil Khare, Tamzid Razzaque	Reveal
SigmanticAI	S25	The Cursor for Chip Design - Delivering Silicon-Ready Chip Designs…	Active	San Francisco, CA, USA	2	Rohil Khare, Tamzid Razzaque	Reveal
stagewise	S25	The Open Source Agentic IDE	Active	—	2	Glenn Töws, Julian Goetze	Reveal
Stellon Labs	S25	Building tiny frontier AI models that run on edge devices	Active	San Francisco, CA, USA	2	Rohan Joshi, Divam Gupta	Reveal
Synthetic Society	S25	Synthetic Users to Simulate Real Users	Active	San Francisco, CA, USA	2	Kavan Doctor, Aaron Chew	Reveal

Batch Distribution

XX2615 XX2515 WW2624 WW2528 WW2457 WW2353

Status Breakdown

Active480 Acquired73 Inactive56 Public1

Top Locations

San Francisco342 New York City36 London20 New York20 Los Angeles13 Austin8

About YC Engineering, Product and Design Companies

Y Combinator has funded 610 engineering, product and design companies since its founding in 2005. These startups span from early-stage pre-launch to publicly traded companies, making YC one of the most prolific backers of engineering, product and design innovation globally.

480 of these companies are currently active. 73 have been acquired. 1 have gone public. VCBacked tracks verified founder contact information, team sizes, and company status for every YC engineering, product and design startup.

Related Industries

B2B3278 Healthcare805 Fintech709 Consumer654 Industrials489 Infrastructure303 Productivity208 Real Estate and Construction184

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