San Francisco

YC Companies in San Francisco

1,500 Y Combinator startups based in San Francisco with verified founder contacts and company data.

1,500

Companies

San Francisco

Location

YC Company Directory

50 companies

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Company	Batch	Description	Status	Location	Team	Founders	Reveal
10x Science	W26	The AI-native platform for next-generation protein characterization.	Active	San Francisco, CA, USA	3	David Roberts, Andrew Reiter, Vishnu Tejus	Reveal
1code (21st.dev)	W26	Orchestration layer for coding agents	Active	San Francisco, CA, USA	3	Serafim Korablev, Sergey Bunas	Reveal
Arzule	W26	AI for B2B Partnerships	Active	San Francisco, CA, USA	2	Jeffrey Lin, Nikhil Reddy	Reveal
Asimov	W26	Internet-scale marketplace for robot training data	Active	San Francisco, CA, USA	3	Lyem Ningthou	Reveal
Aurorin CAD	W26	We help hardware companies ship faster	Active	San Francisco, CA, USA	1	Michael Baron	Reveal
Autumn AI	W26	Stalk your prospects at scale.	Active	San Francisco, CA, USA	2	Shiv Kampani, Vishnu Sampathkumar	Reveal
Avoice	W26	The AI Workspace For Architects	Active	San Francisco, CA, USA	4	Chawin Asavasaetakul, Chawit Asavasaetakul	Reveal
AxionOrbital Space	W26	Foundation models for 24/7 Earth Observation	Active	San Francisco, CA, USA	2	Atharva Peshkar, Dhenenjay Yadav	Reveal
BeeSafe AI	W26	Stopping Scams Before They Reach Your Customers	Active	San Francisco, CA, USA	3	Ariana Mirian, Daniel Spokoyny, Nikolai Vogler	Reveal
Booko	W26	Dynamic pricing for businesses that sell time slots	Active	San Francisco, CA, USA	2	Will Hall, Arjun Saluja	Reveal
Burt	W26	Easily fine tune and deploy specialized models	Active	San Francisco, CA, USA	2	Kurt Sharma, Bobby Zhong	Reveal
Button Computer	W26	Button is the wearable AI that can talk.	Active	San Francisco, CA, USA	2	Chris Nolet, Ryan Burgoyne	Reveal
Byteport	W26	Global upload acceleration for 1GB-100TB files.	Active	San Francisco, CA, USA	1	Jayram Palamadai	Reveal
Canary	W26	The first AI QA engineer that understands your codebase	Active	San Francisco, CA, USA	4	Viswesh N G	Reveal
Cardboard	W26	Agentic video editor	Active	San Francisco, CA, USA	2	Saksham Aggarwal, Ishan Sharma	Reveal
Caretta	W26	Realtime AI for Sales Calls	Active	San Francisco, CA, USA	4	Kayra Bahadir, Omar Elamin, Pavlos Markesinis	Reveal
Cascade	W26	Making Autonomous Intelligence Safe & Reliable	Active	San Francisco, CA, USA	2	Adam AlSayyad, Haluk Cem Demirhan	Reveal
CatchBack Cards	W26	a platform for maximizing the thrill of collecting trading cards	Active	San Francisco, CA, USA	2	Sophia Kim, Joseph Zhang	Reveal
Chamber	W26	Autopiloting your AI infrastructure	Active	San Francisco, CA, USA	4	Charles Ding, Andreas Bloomquist, Jason Ong, Shaocheng Wang	Reveal
Compresr	W26	LLM-native context compression	Active	San Francisco, CA, USA	4	Berke Argin, Kamel Charaf, Oussama Gabouj, Ivan Zakazov	Reveal
Corelayer	W26	AI on-call engineer that debugs using data	Active	San Francisco, CA, USA	2	Shipra Jha, Mitch Radhuber	Reveal
Corvera	W26	Fully autonomous operations for CPG brands	Active	San Francisco, CA, USA	4	Dirk Breeuwer, Matthew Collins, Christopher Kong	Reveal
Crosslayer Labs	W26	Protect, monitor and defend your Internet presence	Active	San Francisco, CA, USA	3	Henry Birge-Lee, Grace Cimaszewski, Prateek Mittal	Reveal
Crow	W26	Let users control your app through chat	Active	San Francisco, CA, USA	2	Jai Bhatia, Aryan Vij	Reveal
Cumulus Labs	W26	The Optimized GPU Cloud	Active	San Francisco, CA, USA	2	Suryaa Rajinikanth, Veer Shah	Reveal
DAIVIN!	W26	Tankless Dive Gear - Breath Autonomy at Sea, Land & Space	Active	San Francisco, CA, USA	1	Leo Kankkunen	Reveal
Didit	W26	All-in-one identity platform for fast human verification.	Active	San Francisco, CA, USA	12	Alberto Rosas, Alejandro Rosas	Reveal
Ditto Biosciences	W26	Evolutionary therapies for autoimmune disease	Active	San Francisco, CA, USA	3	Adair Borges, Dennis Sun, Emily Weiss	Reveal
EigenPal	W26	AI Document Workflows for Enterprises	Active	San Francisco, CA, USA	—	Jedrzej Blaszyk, Matej Novak	Reveal
Emdash	W26	Open-source Agentic Development Environment	Active	San Francisco, CA, USA	2	Arne Strickmann, Raban von Spiegel	Reveal
End Close	W26	AI powered reconciliation for high-volume payments companies	Active	San Francisco, CA, USA	2	Sean Bolton, David Newell	Reveal
Fed10	W26	AI agents that replace your policy consultants	Active	San Francisco, CA, USA	3	Armand Iorgulescu, Zayan Islam, Winston Wei	Reveal
Fenrock AI (YC W26)	W26	The most powerful AI agents for Financial Crime Compliance	Active	San Francisco, CA, USA	2	Charu Sharma	Reveal
Forum	W26	The first regulated exchange to trade on attention.	Active	San Francisco, CA, USA	2	Owen Botkin, Joseph Thomas	Reveal
Galactic Resource Utilization Space, Inc. (GRU Space)	W26	Building the First Hotel on the Moon	Active	San Francisco, CA, USA	2	Skyler Chan	Reveal
Grade	W26	Payroll for performance	Active	San Francisco, CA, USA	2	Lotanna Ezeike, James Heaney	Reveal
GrazeMate	W26	Robot Cowboys that Herd Cattle with AI Drones	Active	San Francisco, CA, USA	4	Sam Rogers	Reveal
Haladir	W26	AI-Enabled Mainframe Modernization and Code Translation.	Active	San Francisco, CA, USA	4	Jibran Hutchins, Quan Huynh, Preston Schmittou, Joseph Tso	Reveal
Hex Security	W26	Agentic Offensive Security at Scale	Active	San Francisco, CA, USA	3	Huzaifa Ahmad, Ahmad Khan, Prama Yudhistira	Reveal
Human Archive	W26	Multimodal data provider for robotics learning	Active	San Francisco, CA, USA	4	Rushil Agarwal, Samay Maini, Raj Patel, Shloke Patel	Reveal
IncidentFox	W26	AI SRE agent that triages, coordinates, and fixes production incidents	Active	San Francisco, CA, USA	2	Jimmy Wei, Long Yi	Reveal
Inviscid AI	W26	Real-time Building Simulations to Optimize Energy and Operational…	Active	San Francisco, CA, USA	2	Kabir Jain, Ziming Qiu	Reveal
Jinba	W26	Automate any enterprise workflow through chat	Active	San Francisco, CA, USA	4	Shoya Matsumori, Takuya Norisugi	Reveal
Kita	W26	Turn documents into signals for lenders	Active	San Francisco, CA, USA	2	Carmel Limcaoco, Rhea Malhotra	Reveal
Lance	W26	Your Hotel's Best Employees	Active	San Francisco, CA, USA	3	Gavin Brennen, Caleb Chan, Gatik Trivedi	Reveal
LegalOS	W26	The AI-powered law firm for complex work visas	Active	San Francisco, CA, USA	3	Matthew Asir, Rachel Asir, Claire Jutabha	Reveal
Lexius	W26	AI Crime Detection	Active	San Francisco, CA, USA	3	David Elskamp, Liam Webster	Reveal
Lucent	W26	AI that automatically watches your session replays to detect bugs.	Active	San Francisco, CA, USA	2	Alisa Rae	Reveal
Luel	W26	Turning everyday words and actions into usable training data.	Active	San Francisco, CA, USA	2	Inigo Lenderking, William Namgyal	Reveal
Martini	W26	Collaborative AI-native filmmaking for professionals	Active	San Francisco, CA, USA	2	Long Hoang, Koh Terai	Reveal