San Francisco

YC Companies in San Francisco

2,672 Y Combinator startups based in San Francisco with verified founder contacts and company data.

2,672

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	5	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
21st	W26	UI building blocks for the agentic internet	Active	San Francisco, CA, USA	3	Serafim Korablev, Sergey Bunas	Reveal
Aemon	W26	The Forward-Deployed AI Research Engineer	Active	San Francisco, CA, USA	3	Richard Zhou, Ray Xu	Reveal
Agentic Fabriq	W26	The control plane for AI agents.	Active	San Francisco, CA, USA	2	Paulina Xu, Matthew Xu	Reveal
ARC Prize Foundation	W26	AI benchmarks that measure general intelligence and inspire new ideas	Active	San Francisco, CA, USA; Remote	4	Greg Kamradt	Reveal
Arzule	W26	AI for B2B Partnerships	Active	San Francisco, CA, USA	2	Jeffrey Lin, Nikhil Reddy	Reveal
Ashr	W26	Automated Multi-Modal Testing for Agents	Active	San Francisco, CA, USA	2	Shreyas Kaps, Rohan Kulkarni	Reveal
Asimov	W26	Real-world human movement data for humanoid robots	Active	San Francisco, CA, USA; Remote	3	Lyem Ningthou	Reveal
Aurorin CAD	W26	Claude code for Mechanical Engineers	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
AxionOrbital Space	W26	Foundation models for 24/7 Earth Observation	Active	San Francisco, CA, USA	2	Atharva Peshkar, Dhenenjay Yadav	Reveal
Beacon Health	W26	AI Employees for Primary Care	Active	San Francisco, CA, USA	2	Mark Pothen, Obinna Akahara	Reveal
BeeSafe AI	W26	Frontier AI Defenses for Social Engineering Attacks	Active	San Francisco, CA, USA	3	Daniel Spokoyny, Ariana Mirian, Nikolai Vogler	Reveal
Booko	W26	Dynamically pricing the whole economy.	Active	San Francisco, CA, USA	2	Will Hall, Arjun Saluja	Reveal
Bubble Lab	W26	Operating system for premium professional communities	Active	San Francisco, CA, USA	2	Selina Li, Zach Zhong	Reveal
Burt	W26	Easily fine tune and deploy specialized models	Active	San Francisco, CA, USA	2	Kurt Sharma, Bobby Zhong	Reveal
Button Computer	W26	The tiny computer built for voice AI.	Active	San Francisco, CA, USA	1	Chris Nolet	Reveal
Byteport	W26	Global upload acceleration for 1GB-100TB files.	Active	San Francisco, CA, USA	4	Jayram Palamadai	Reveal
Byteport	W26	Global upload acceleration for 1GB-100TB files.	Active	San Francisco, CA, USA	1	Jayram Palamadai	Reveal
Cajal	W26	Scaling formal verification to accelerate scientific discovery	Active	San Francisco, CA, USA	2	Pedro Nobre, Luke Johnston	Reveal
Canary	W26	The first AI QA engineer that understands your code	Active	San Francisco, CA, USA	2	Aakash Mahalingam, Viswesh N G	Reveal
Canary	W26	The first AI QA engineer that understands your codebase	Active	San Francisco, CA, USA	4	Viswesh N G	Reveal
Captain	W26	Self-tuning file search for AI agents	Active	San Francisco, CA, USA	2	Lewis Polansky, Edgar Babajanyan	Reveal
Cardboard	W26	Agentic video editor	Active	San Francisco, CA, USA	5	Saksham Aggarwal, Ishan Sharma	Reveal
Caretta	W26	Realtime AI for Sales Calls	Active	San Francisco, CA, USA	4	Kayra Bahadir, Omar Elamin, Pavlos Markesinis, Kayra Bahadır	Reveal
Caretta	W26	Realtime AI for Sales Calls	Active	San Francisco, CA, USA	4	Kayra Bahadir, Omar Elamin, Pavlos Markesinis	Reveal
Cascade	W26	Distilling Proprietary Intelligence	Active	San Francisco, CA, USA	2	Adam AlSayyad, Haluk Cem Demirhan	Reveal
CatchBack Cards	W26	The most thrilling way to create and rip digital collectible packs	Active	San Francisco, CA, USA	7	Joseph Zhang, Sophia Kim	Reveal
Chamber	W26	Autopiloting your AI infrastructure	Active	San Francisco, CA, USA	4	Charles Ding, Andreas Bloomquist, Jason Ong, Shaocheng Wang	Reveal
CodeWisp	W26	Anyone can create real games with AI	Active	San Francisco, CA, USA	3	Elvin Fu	Reveal
Compresr	W26	LLM context compression for better accuracy	Active	San Francisco, CA, USA	4	Ivan Zakazov, Berke Argin, Kamel Charaf, Oussama Gabouj	Reveal
Confluence Labs	W26	AI models that learn from experience	Active	San Francisco, CA, USA	2	Brent Burdick, Niranjan Baskaran	Reveal
Congruent	W26	AI native radars for self-driving cars	Active	San Francisco, CA, USA	2	Clement Barthes	Reveal
Copperlane	W26	Agentic Mortgage Origination	Active	San Francisco, CA, USA	2	Athan Zhang, Brianna Lin	Reveal
Corelayer	W26	AI on-call engineer that debugs using data	Active	San Francisco, CA, USA	2	Shipra Jha, Mitch Radhuber	Reveal
Corelayer	W26	AI production engineer for regulated industries	Active	San Francisco, CA, USA	3	Mitch Radhuber, Shipra Jha	Reveal
Corvera	W26	Fully autonomous operations for CPG brands	Active	San Francisco, CA, USA	4	Dirk Breeuwer, Matthew Collins, Christopher Kong	Reveal
Corvera	W26	The context layer for AI-native CPG brands	Active	San Francisco, CA, USA	4	Christopher Kong, Dirk Breeuwer, Matthew Collins	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 Fastest Multimodal Inference OS	Active	San Francisco, CA, USA	2	Veer Shah, Suryaa Rajinikanth	Reveal
DAIVIN!	W26	Tankless Dive Gear - Breath Autonomy at Sea, Land & Space	Active	San Francisco, CA, USA	1	Leo Kankkunen	Reveal
/dev/fast	W26	/dev/fast is the AI-native code forge	Active	San Francisco, CA, USA	4	Sid Menon, Ketan Agrawal, Milan Bhandari, Alex Iansiti	Reveal
Didit	W26	Infrastructure for identity and fraud.	Active	San Francisco, CA, USA	16	Alberto Rosas, Alejandro Rosas, Alberto Rosás García	Reveal
Ditto Biosciences	W26	Evolutionary therapies for autoimmune disease	Active	San Francisco, CA, USA	3	Adair Borges, Dennis Sun, Emily Weiss	Reveal
Ditto Biosciences	W26	Evolutionary intelligence for autoimmune disease	Active	San Francisco, CA, USA	3	Dennis Sun, Adair Borges, Emily Weiss	Reveal
Docura Health	W26	AI-Native Med-Legal Firm	Active	San Francisco, CA, USA	3	Akhil Sachdev	Reveal
EigenPal	W26	AI Document Workflows for Enterprises	Active	San Francisco, CA, USA	—	Jedrzej Blaszyk, Matej Novak	Reveal
EigenPal	W26	AI Document Workflows for Enterprises	Active	San Francisco, CA, USA	—	Matej Novak, Jedrzej Blaszyk	Reveal