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
Airweave	X25	The open-source context retrieval layer for agents	Active	San Francisco, CA, USA	7	Lennert Jansen, Rauf Akdemir	Reveal
Alkali	X25	The smarter way to estimate steel.	Active	Houston, TX, USA	2	Emmett Goodman, Victor Miller	Reveal
Aravolta	X25	Software to monitor, control, and optimize data centers.	Active	San Francisco, CA, USA	4	Margarita Groisman, Jack Sutton	Reveal
Atlog	X25	Outbound voice and text AI without a prompt	Active	New York City, NY, USA	2	Vraj Parikh, John Bettinger	Reveal
Attune	X25	Faster builds, zero effort.	Active	San Francisco, CA, USA	3	Xin Ding	Reveal
Auctor	X25	The agentic operating system for modern system integrators.	Active	New York City, NY, USA	30	William Sun, Matthew Blackburn, Anthony Sky Ng-Thow-Hing, Xinan Rahman	Reveal
Aviro	X25	Environments for Long Horizon Tool Use	Active	San Francisco, CA, USA	2	Aarush Kukreja, Ayush Karupakula	Reveal
Beluga	X25	Creator marketing that scales like paid ads	Active	San Francisco, CA, USA	3	Fernando Young, Jack Swisher	Reveal
Besimple AI	X25	Voice data for AI	Active	San Francisco, CA, USA	6	Yi Zhong, Bill Wang	Reveal
Better Auth	X25	The authentication framework for TypeScript	Active	San Francisco, CA, USA	4	Bereket Engida	Reveal
BitBoard	X25	Let your agent build dashboards and reporting.	Active	San Francisco, CA, USA	2	Connor Jones, Ambar Choudhury	Reveal
Primer	F25	AI Product Demos	Active	San Francisco, CA, USA	2	Chris Farestveit, Vinh Ha	Reveal
Prox	F25	AI technical support for complex physical products	Active	San Francisco, CA, USA	7	Dima Yanovsky, Gregory Makodzeba	Reveal
Prox	F25	AI agents for third-party logistics	Active	—	2	Dima Yanovsky, Gregory Makodzeba	Reveal
Questom	F25	AI Agents for B2B Sales	Active	—	2	Abhimanyu Yadav, Ritanshu Dokania	Reveal
Radius	F25	Code and browse in the same place	Active	San Francisco, CA, USA	2	Quentin Romero Lauro, Michael Klikushin	Reveal
Redapto	F25	—	Active	San Francisco, CA, USA	2	Anirudh Pupneja	Reveal
Redapto	F25	Intelligence that moves the world	Active	San Francisco, CA, USA	7	Anirudh Pupneja	Reveal
Rivet	F25	Visual editor to design in production code	Active	San Francisco, CA, USA	—	Sam Gorman	Reveal
Rovr	F25	AI FDE Engine that runs your engineering workflows	Inactive	San Francisco, CA, USA	3	Arnav Jain, Yash Jain, Nithik Yekollu	Reveal
s2.dev	F25	API for unlimited, durable, real-time streams	Active	San Francisco, CA, USA	5	Shikhar Bhushan, Stephen Balogh, Dwarak Govind Parthiban, Dwarak Parthiban	Reveal
Sciloop	F25	Expert STEM reasoning data for frontier AI labs.	Active	San Francisco, CA, USA	6	Bilal Asmatullah, Osman Siddique	Reveal
Scoop	F25	Automating regulatory submissions for life sciences	Active	San Francisco, CA, USA	2	Vincent Park, Jay Kwon	Reveal
Scott AI	F25	The planning layer for teams that build with coding agents	Active	New York City, NY, USA	3	David Maulick, Devin Cintron	Reveal
Semble AI	F25	Autonomous building-system design for construction companies.	Active	San Francisco, CA, USA	2	Jonathan Tyshler, Ethan Boyers	Reveal
Semble AI	F25	The all-in-one software for integrators.	Active	San Francisco, CA, USA	14	Jonathan Tyshler, Ethan Boyers	Reveal
Semiotic	F25	Studio-Grade Design at Scale	Active	San Francisco, CA, USA	3	Michael Roberson, Bryan Grisales, Brandon Yao	Reveal
SF Tensor	F25	Infrastructure for AI labs to focus on research.	Active	—	6	Ben Koska, Luk Koska, Tom Koska	Reveal
Sorce	F25	Tinder for jobs	Active	San Francisco, CA, USA	6	Oluwapelumi Dada, Daniel Ajayi, David Alade	Reveal
Soren	F25	The AI workforce for business operations.	Active	San Francisco, CA, USA	—	Kevin Xie	Reveal
Sourcebot	F25	Helping humans and AI agents understand massive codebases	Active	San Francisco, CA, USA	2	Michael Sukkarieh, Brendan Kellam	Reveal
Specific	F25	AWS for coding agents	Active	Stockholm, Stockholm County, Sweden	2	Fabian Lindfors, Iman Radjavi	Reveal
Sylvian	F25	Specialized AI Agents.	Inactive	San Francisco, CA, USA	2	William Huang, Niall Kehoe	Reveal
Telemetron	F25	Support and Operations Platform for Hardware Companies	Active	—	2	Shivani Patel, Hamza Shaikh	Reveal
Tell if AI	F25	AI agents on real phones, growing brands across every platform.	Active	Austin, TX, USA	2	Austin Stone, Ilariia Belova	Reveal
Terrain	F25	AI native GTM platform for the physical economy	Active	San Francisco, CA, USA	2	Tejas Agarwal, Pankaj Mishra	Reveal
The Context Company	F25	Monitor AI agents and understand user behavior	Active	San Francisco, CA, USA	2	Arman Kumaraswamy, Rohil Agarwal	Reveal
The Context Company	F25	Monitor AI agents and understand user behavior	Active	San Francisco, CA, USA	2	Arman Kumaraswamy, Rohil Agarwal	Reveal
The Hog	F25	Real-time web intelligence API for AI agents and GTM teams	Active	San Francisco, CA, USA	2	Hudson Liao, Paulo Nascimento	Reveal
Thesis	F25	Autonomous AI research	Active	San Francisco, CA, USA	3	Sergio Charles, Luigi Charles	Reveal
Trelium	F25	The Agent to Build Your Agents	Active	San Francisco, CA, USA; Remote	6	Abhimanyu Yadav, Ritanshu Dokania	Reveal
Unsiloed AI	F25	API for parsing multimodal unstructured data	Active	San Francisco, CA, USA	2	Aman Mishra, Adnan Abbas	Reveal
Unsiloed AI	F25	API for parsing multimodal unstructured data	Active	San Francisco, CA, USA	2	Aman Mishra, Adnan Abbas	Reveal
Uplane	F25	Replace marketing agencies with AI	Active	San Francisco, CA, USA	22	Julius Körfgen, Marvin Abdel-Massih, Lukas Vollmer, Julius Korfgen	Reveal
Velvet	F25	Data for world models	Active	San Francisco, CA, USA	2	Lucas Mantovani, Lucas Tucker	Reveal
Veria Labs	F25	Continuous AI pentesting that finds and fixes vulnerabilities	Active	San Francisco, CA, USA	3	Cayden Liao, Jayden Sarveshkumar, Stephen Xu	Reveal
Zalos	F25	Computer Agents for Finance tasks like reconciliation, in your system!	Active	London, England, United Kingdom	2	William Fairbairn, Hung Hoang	Reveal
Zalos	F25	Computer Agents for Finance tasks like reconciliation, in your system!	Active	—	2	William Fairbairn, Hung Hoang	Reveal
Zarna	F25	AI Associates for Private Capital	Active	San Francisco, CA, USA	4	Rishabh Dhariwal, Vivan Agrawal, Hrishi Joshi, Rakesh Mehta	Reveal
Zarna	F25	AI Associates for Middle-Market Private Equity	Active	San Francisco, CA, USA	4	Rishabh Dhariwal, Vivan Agrawal, Hrishi Joshi, Rakesh Mehta	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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