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

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YC Company Directory

50 companies

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Company	Batch	Description	Status	Location	Team	Founders	Reveal
PerfectBit, Inc.	X26	Correct by construction AI training data	Active	San Francisco, CA, USA	2	Seiji Yamamoto, Peter Vajda	Reveal
Playabl.ai	X26	TikTok for User-generated Games	Active	San Francisco, CA, USA	10	Hamza Al-Ali, Omar Jarrah, Sanad Kiswani, Hamza Ali	Reveal
Plena Health	X26	Plena is the AI operating system for specialty medical practices	Active	San Francisco, CA, USA	—	Eyad Abdalla, Ahmed Al Mudarris, Ahmed Al Mudarris	Reveal
Ploy	X26	Ploy turns your website into your company's growth engine.	Active	San Francisco, CA, USA	14	Bryant Chou	Reveal
ProjectX	X26	Agent native workspace for heavy parallel workflows on the web	Active	San Francisco, CA, USA	8	Rounak Adhikary, Bishal Karmakar, Sourya Majumder	Reveal
Prototyping.io	X26	Autonomous manufacturing for mechanical parts	Active	San Francisco, CA, USA	2	Revanth Bodepudi, Prerit Oberai	Reveal
qomplement	X26	The Agentic ERP for supply chain operations	Active	San Francisco, CA, USA	7	Kerim Taray, Andres Garza	Reveal
ReasonBlocks	X26	The runtime layer that makes AI agents cheaper and more reliable	Active	San Francisco, CA, USA	2	Sajeev Magesh, Rohan Vij	Reveal
RentAHuman	X26	Marketplace for AI agents to hire humans.	Active	San Francisco, CA, USA	3	Alexander Liteplo	Reveal
Replicas	X26	Run any coding agent harness in the cloud	Active	San Francisco, CA, USA	2	Connor Loi, Saai Arora	Reveal
River Markets	X26	Prime brokerage for prediction markets	Active	San Francisco, CA, USA	2	Oscar Levy, Antonin Parrot	Reveal
Rudus	X26	AI Takeoffs for Concrete	Active	San Francisco, CA, USA	2	Rishi Pankhaniya, Sahil Goel	Reveal
Runtime	X26	Build and run internal agents, without managing the infrastructure	Active	San Francisco, CA, USA	3	Gus Trigos, Carlos Volante	Reveal
Saffron	X26	Helping your company find 10x engineers.	Active	San Francisco, CA, USA	3	Robert Chondro, Kazuma Choji, Jerry Yao	Reveal
Salesgraph	X26	Proactive revenue agents that move enterprise deals forward	Active	San Francisco, CA, USA	2	Ruhan Ponnada, Ricardo Nunez	Reveal
Saudara AI	X26	AI Native Sourcing Broker For Overseas Manufacturing	Active	San Francisco, CA, USA	2	Edward Haryono, Jennifer Prasetyo	Reveal
Savant	X26	Company brain every AI-native enterprise runs on	Active	San Francisco, CA, USA	2	Anthony Kim, Kevin Yu	Reveal
Sazabi	X26	The AI-native observability platform for fast-moving engineering teams	Active	San Francisco, CA, USA	10	Sherwood Callaway	Reveal
Scope	X26	We help software companies get discovered and used by AI agents	Active	San Francisco, CA, USA	2	Anand-Arnaud Pajaniradjane, Anand Pajaniradjane	Reveal
Sherpa	X26	Make websites improve themselves.	Active	San Francisco, CA, USA	2	Ethan Kinnan, Norbu Sonam	Reveal
shotwell.ai	X26	Annotations for robotics data	Active	San Francisco, CA, USA	4	Farhan Khan, Ali Abdalla, Ali Abid, Nour Eldifrawy	Reveal
Silmaril	X26	Security for agents that self-improves	Active	San Francisco, CA, USA	2	Aum Upadhyay, Eduardo Velasco	Reveal
smol machines	X26	Ship software faster with portable, self contained virtual machines.	Active	San Francisco, CA, USA	1	BinBin He, BinBin H.	Reveal
StableBrowse	X26	Building the Data Infrastructure layer for Physical AI.	Active	San Francisco, CA, USA	3	Sarthak Awasthi, Jay Mehta, Deepit Shah, Somansh Shah	Reveal
Stage	X26	Code review platform for humans and agents	Active	San Francisco, CA, USA	2	Dean Stratakos, Charles Pan	Reveal
Standout	X26	Agentic hiring marketplace	Active	San Francisco, CA, USA	5	Alexis Aftalion, Witold de La Chapelle	Reveal
Superlog	X26	Make software self-healing	Active	San Francisco, CA, USA	2	Nicolò Magnante, Arseniy Shishaev	Reveal
Superset	X26	Building self-improving software	Active	San Francisco, CA, USA	3	Kiet Ho, Satya Patel, Avi Peltz	Reveal
Surtr Defense Systems	X26	The hardware-agnostic operating system for drone defense	Active	San Francisco, CA, USA	2	Anshul Ahluwalia, Cameron Fiore	Reveal
Synphony	X26	robots & software for farms	Active	San Francisco, CA, USA	10	Sean Wu, Lucas Amlicke	Reveal
Taiga	X26	Autonomous medical billing	Active	San Francisco, CA, USA	2	Nanda Guntupalli, Adam Wax	Reveal
TakeCareOS	X26	AI-native operating system for long term care providers	Active	San Francisco, CA, USA	1	Ragav Sachdeva	Reveal
Tasklet	X26	Agents that own the work	Active	San Francisco, CA, USA	8	Jonny Dimond, Andrew Lee	Reveal
tday.com	X26	AI that turns your product into on-brand marketing content	Active	San Francisco, CA, USA	2	Cyrus Kelly, David McDonough, Shyamsundar Shrestha	Reveal
TesterArmy	X26	Test your app with AI, catch bugs before users do	Active	San Francisco, CA, USA; Remote	4	Szymon Rybczak, Oskar Kwaśniewski	Reveal
Tolmo	X26	Tolmo is the AI security platform that secures every layer of cloud…	Active	San Francisco, CA, USA	12	Pierre Betouin, Vladimir de Turckheim, Jean-Baptiste Aviat	Reveal
transload	X26	Measure freight with security cameras	Active	San Francisco, CA, USA	3	Julius Scheel, Nils Börner, Jago Wahl-Schwentker	Reveal
Trellis	X26	Agents that run short-term rental operations end-to-end	Active	San Francisco, CA, USA	5	Lodovico Benvenuti, Jan Sahagun	Reveal
Twolabs	X26	Humanoid robot platform for builders.	Active	San Francisco, CA, USA	2	Sardor Rahmatulloev, Danyal Ahmad	Reveal
Uno Wallet	X26	The AI mobile wallet that replaces Apple Pay	Active	San Francisco, CA, USA	2	Mordi Shadpour, Saket Joshi	Reveal
Userlens	X26	Let agents talk to your customers	Active	San Francisco, CA, USA	4	Ankur Dahama, Hai Ta	Reveal
Voquill	X26	The agentic OS for medical labs	Active	San Francisco, CA, USA	3	Michael Gibson, Henry Habib, Josiah Saunders	Reveal
Walter	X26	AI Employee for Manufacturing Operations	Active	San Francisco, CA, USA	—	Nikolas Keller, Lukas Postulka	Reveal
Wato	X26	The control point for AI agents at work.	Active	San Francisco, CA, USA	2	Arihan Varanasi, Rahul Rejeev	Reveal
Wealor	X26	AI-native platform for wealth managers	Active	San Francisco, CA, USA	—	Karim Bouri, Pierre Depuydt	Reveal
YouArt	X26	Patreon for AI Originals	Active	San Francisco, CA, USA	3	Harry Zheng, Edward Ma, Keith Zhang	Reveal
Zibra Labs	X26	Distributed runtime for AI workloads at scale	Active	San Francisco, CA, USA	2	Ibrahim Rabbani, Zac Policzer	Reveal
a0.dev	W25	We make mobile apps using AI.	Active	San Francisco, CA, USA	3	Seth Setse, Ayomide Omolewa	Reveal
A1Base	W25	Twilio for AI Agents	Active	San Francisco, CA, USA	2	Pennie Huang	Reveal
A1Zap by A1Base	W25	The social network layer for AI apps	Active	San Francisco, CA, USA	2	Pasha Rayan, Pennie Huang	Reveal