Industry

YC B2B Companies

3,278 Y Combinator b2b startups with verified founder contacts, batch info, and company data.

3,278

Companies

964

Active

Acquired

Public

YC Company Directory

50 companies

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Company	Batch	Description	Status	Location	Team	Founders	Reveal
Lucidic AI	W25	Reimagining how Machines Learn	Active	San Francisco, CA, USA	—	Abhinav Sinha, Andy Liang, Jeremy Tian	Reveal
Macadamia	W25	AI Agents for Complex Engineering Projects	Active	Ghent, Flanders, Belgium	2	Abel Van Steenweghen, Brecht Pierreux, Abel Van Steenweghen	Reveal
Maive	W25	AI for Home Services	Active	San Francisco, CA, USA	2	David Tondreau, Will Cray	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
Mercura	W25	AI Quote and Order Automation for Distributors & Manufacturers	Active	—	14	Lukas Bock, Stefan Zheng	Reveal
Mercura	W25	AI Quote and Order Automation for Distributors & Manufacturers	Active	BY, Germany	20	Lukas Bock, Stefan Zheng, Hai Dang	Reveal
Mesh	W25	Eliminating accrual spreadsheets for faster month-end	Active	San Francisco, CA, USA	3	Erin Kim, Nandini Ramakrishnan	Reveal
Mundo AI	W25	High Quality Multilingual Training Data for AI Models	Active	Vancouver, BC, Canada	30	Jason Liao, Naijide Anwaer, Garreth Lee, Kenneth Wu	Reveal
Nitrode	W25	Frontier AI research to advance game development	Active	San Francisco, CA, USA	10	Ben Kim, Sejoon Chang, Brian La	Reveal
Oki	W25	Personalized Updates on Company Progress	Active	San Francisco, CA, USA	2	Luofei Chen, Aayush Tyagi	Reveal
Olive	W25	Curated stories, every day	Active	San Francisco, CA, USA	2	Bardia Safari, Shrey Gupta	Reveal
Onlook	W25	Cursor for Designers	Active	San Francisco, CA, USA	4	Daniel Farrell	Reveal
OpenIntake	W25	The AI Front Door For Law Firms	Active	New York, NY, USA	2	Yash Sahota, Grayson Pike	Reveal
OpenIntake	W25	The AI Front Door For Law Firms	Active	New York City, NY, USA	2	Yash Sahota, Grayson Pike	Reveal
Operand	W25	—	Active	San Francisco, CA, USA	8	Ram Gorthi, Akhil Iyengar, Arjun Sahney	Reveal
Operand	W25	AI to run Business Strategy	Active	San Francisco, CA, USA	5	Ram Gorthi, Akhil Iyengar, Arjun Sahney	Reveal
Optifye.ai	W25	AI performance monitoring for factory workers	Active	San Francisco, CA, USA	3	Vivaan Baid, Kushal Mohta	Reveal
Optifye.ai	W25	AI performance monitoring for factory workers	Active	San Francisco, CA, USA	8	Vivaan Baid, Kushal Mohta	Reveal
Orchids	W25	AI App Builder	Active	—	6	Kevin Lu, Bach Tran	Reveal
Osmosis	W25	Reinforcement Learning (RL) for AI Agents	Active	San Francisco, CA, USA	6	Kasey Zhang, Andy Lyu	Reveal
Outlit	W25	Retain and Grow Every Customer	Active	San Francisco, CA, USA	3	Josh Earle, Leo Paz	Reveal
Outship	W25	Hire amazing engineers by seeing how they use AI	Active	San Francisco, CA, USA	3	Saner Cakir, Kayla Lee	Reveal
Overstand Labs	W25	Navigate any set of data - no matter how large - in minutes.	Active	New York City, NY, USA	4	Mihir Patil, Derrick Cheng	Reveal
Ovlo	W25	Founder led hiring for London startups	Active	Dubai, Dubai, United Arab Emirates	2	Andrew Malouf, Amer Eid	Reveal
Peppr AI	W25	Self-improving knowledge base synthesizing scattered company data	Active	—	4	Sachitt Arora, Nitya Arora	Reveal
Pinch	W25	Real-time AI Voice Translation for Developers	Active	VC, Spain; Remote	3	Christian Safka	Reveal
Praxim	W25	The agentic AI Word editor	Active	San Francisco, CA, USA	2	Richie Hsiung, Frank Li	Reveal
Praxim	W25	The agentic AI Word editor	Active	San Francisco, CA, USA	2	Richie Hsiung, Frank Li	Reveal
Promptless	W25	An AI teammate that automatically updates your customer-facing docs	Active	San Francisco, CA, USA	5	Prithvi Ramakrishnan, Frances Liu	Reveal
Quantstruct	W25	AI documentation engineer – test & autoimprove stale product docs	Active	San Francisco, CA, USA	2	Sarthak Srinivas, Newman Hu	Reveal
Rebolt	W25	AI-Powered Company OS	Active	San Francisco, CA, USA	3	Celia Manzano, Javier Sanchez	Reveal
ReJot	W25	We turn complex API integrations into drop‑in full‑stack libraries	Active	Amsterdam, NH, Netherlands	2	Wilco Kruijer, Jan Schutte	Reveal
Riviera	W25	AI Employees for Hotels	Active	San Francisco, CA, USA	2	Shaun Lane, Daniel Tyshler	Reveal
Riviera	W25	AI Employees for Hotels	Active	San Francisco, CA, USA	2	Shaun Lane, Daniel Tyshler	Reveal
Roark	W25	Test, monitor, and improve your voice agents	Active	San Francisco, CA, USA	3	James Zammit, Daniel Gauci	Reveal
Rocketable	W25	The AI Maximalist Software Holding Company	Active	—	2	Alan Wells	Reveal
Rocketable	W25	The AI Maximalist Software Holding Company	Active	San Francisco, CA, USA; Remote	2	Alan Wells	Reveal
SalesPatriot	W25	We help defense firms win more contracts with the Pentagon	Active	San Francisco, CA, USA	13	Nelson Ray, Ben Rhodes-Kropf, Maciej Szymczyk	Reveal
SalesPatriot	W25	AI powered operating system for distributors and OEMs	Active	San Francisco, CA, USA	15	Nelson Ray, Ben Rhodes-Kropf, Maciej Szymczyk, Benjamin Rhodes-Kropf	Reveal
SAMMY Labs	W25	SAMMY Labs, the knowledge layer for your people and AI	Active	—	10	Joe Savidge, Shav Vimalendiran	Reveal
SAMMY Labs	W25	Computational Law	Active	London, England, United Kingdom	10	Joe Savidge, Shav Vimalendiran	Reveal
Sennu AI	W25	AI Code Review for Salesforce Development	Active	San Francisco, CA, USA	2	Sriman Gaddam, Sukhjit Singh	Reveal
Sennu AI	W25	We turn traditional companies into AI companies	Active	San Francisco, CA, USA	2	Sriman Gaddam, Sukhjit Singh	Reveal
Solidroad	W25	AI agents for CX teams, starting with training and QA.	Active	San Francisco, CA, USA	6	Mark Hughes, Patrick Finlay	Reveal
Spott	W25	AI-native ATS/CRM for recruiting firms	Active	Leuven, Flanders, Belgium	50	Manu Vanderveeren, Lander Degreve, Samuel Smeys	Reveal
Stamp	W25	The AI Native Email Client	Active	—	1	Archit Mehta	Reveal
Stamp	W25	The AI Secretary for Email and Calendar.	Active	San Francisco, CA, USA	1	Archit Mehta	Reveal
Stillwind	W25	Electrical Engineering Components Compaion	Active	Zürich, ZH, Switzerland	3	Linus Meierhöfer, Lukas Ego, Hannes Furmans, Josef Zoller	Reveal
SubImage	W25	The Open-Core Security Graph	Active	San Francisco, CA, USA	4	Alex Chantavy, Kunaal Sikka	Reveal
Subtrace	W25	Zero code network tracer	Active	San Francisco, CA, USA	2	Adhityaa Chandrasekar, Sachin Sridhar	Reveal

Batch Distribution

XX2693 XX2574 WW26160 WW25132 WW24220 SS2637

Status Breakdown

Active964 Inactive26 Acquired10

Top Locations

San Francisco661 New York City71 London31 New York17 Paris13 Stockholm12

About YC B2B Companies

Y Combinator has funded 3,278 b2b 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 b2b innovation globally.

964 of these companies are currently active. 10 have been acquired. VCBacked tracks verified founder contact information, team sizes, and company status for every YC b2b startup.

Related Industries

Healthcare805 Fintech709 Consumer654 Engineering, Product and Design610 Industrials489 Infrastructure303 Productivity208 Real Estate and Construction184

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