Companies199

Active98%

Acquired or public0%

Inactive2%

Y Combinator's directory lists 199 companies in the Winter 2026 batch: 196 Active, 0 Acquired, 0 Public and 3 Inactive. Winter 2026 is less than two years out, so its Inactive share (2%) is not yet comparable with older batches (23% across batches at least two years old).

ActiveAcquiredPublicInactive

Statuses are Y Combinator's own listing in its public company directory, read on the date shown. YC's directory can drop companies altogether, so the Inactive counts here are a floor, not a full count of companies that stopped. Acquired and Public are as YC lists them; neither says anything about the price or the outcome for founders.

Every company in Winter 2026

Company	What they do	Status	Team
/dev/fast	/dev/fast is the AI-native code forge	Active	4
10x Science	The AI-native platform for next-generation protein characterization.	Active	5
21st	UI building blocks for the agentic internet	Active	3
Aemon	The Forward-Deployed AI Research Engineer	Active	3
Agentic Fabriq	The control plane for AI agents.	Active	2
Alt-X	Building the best venue for private markets exposure.	Active	2
Anchorhead	Evals for frontier research agents	Active	1
Approxima	Your software should build itself.	Active	2
ARC Prize Foundation	AI benchmarks that measure general intelligence and inspire new ideas	Active	4
Ashr	Enterprise post-training, monitoring, and continual learning platform	Active	2
Asimov	Real-world human movement data for humanoid robots	Active	3
Aurorin CAD	Claude code for Mechanical Engineers	Active	1
AutoSitu	The AI operating system for the built world	Active	2
Autumn AI	Everything on anyone.	Active	2
Avoice	AI-native workspace for AEC	Active	7
AxionOrbital Space	Foundation models for 24/7 Earth Observation	Active	2
Axis	An AI Copilot for Trading Desks	Active	2
Balance	Full-Stack AI Accounting	Active	4
BaseFrame	Detect what AI can automate for your team	Active	2
Beacon Health	AI Employees for Primary Care	Active	2
BeeSafe AI	Frontier AI Defenses for Social Engineering Attacks	Active	3
Beyond Reach Labs	Space solar arrays that grow to the size of a football field in orbit	Active	8
Bidflow	AI Takeoffs for Electrical	Active	2
Booko	Dynamically pricing the whole economy.	Active	2
Brumby (Formerly GrazeMate)	Robot Cowboys that Herd Cattle with AI Drones	Active	3
Bubble Lab	Turn gatherings into lasting relationships.	Active	2
Burt	AI teammates for logistics	Active	2
Button Computer	The tiny computer built for voice AI.	Active	1
Byteport	Global upload acceleration for 1GB-100TB files.	Active	4
Cajal	Scaling formal verification to accelerate scientific discovery	Active	2
Canary	Adversarial AI that breaks your AI	Active	2
Captain	Self-tuning file search for AI agents	Active	2
Cardboard	Agentic video editor	Active	8
Cardinal	Revenue Agents for GTM teams	Active	—
Caretta	Realtime AI for Sales Calls	Active	4
Carrot Labs	AI Cost Management: Track and attribute AI spend across every provider	Active	2
Cascade	Distilling Proprietary Intelligence	Active	2
CatchBack Cards	The most thrilling way to create and rip digital collectible packs	Active	7
CellType	The agentic drug company. We simulate human biology.	Active	5
Chamber	The AIOps Agent for ML Teams	Active	4
Chasi	AI Revenue Engine for the Equipment Industry	Active	2
ClaimGlide	AI automated prior-auths for private medical practices	Active	1
CodeWisp	Anyone can create real games with AI	Active	3
Cofia	AI automations that implement themselves	Active	3
Compresr	LLM context compression for better accuracy	Active	3
Condor Energy	Software for enterprise energy procurement.	Active	3
Confluence Labs	AI models that learn from experience	Active	2
Congruent	AI native radars for self-driving cars	Active	2
Constellation Space	AI operating system for mega-scale satellite networks.	Active	4
Copperlane	Agentic Mortgage Origination	Active	3
Corelayer	AI production engineer for regulated industries	Active	3
Corvera	The AI sales engine for CPG brands	Active	4
Crosslayer Labs	Protect, monitor and defend your Internet presence	Active	3
Cumulus Labs	The Fastest Multimodal Inference OS	Active	2
DAIVIN!	Tankless Dive Gear - Breath Autonomy at Sea, Land & Space	Active	1
Didit	Infrastructure for identity and fraud.	Active	16
Ditto Biosciences	Evolutionary intelligence for autoimmune disease	Active	3
Docura Health	AI-Native Med-Legal Firm	Active	3
Doomersion	Doomscroll to learn languages	Active	4
EigenPal	AI Document Workflows for Enterprises	Active	—
Emdash	Open-source Agentic Development Environment	Active	2
End Close	AI powered reconciliation for high-volume payments companies	Active	2
Envariant	Interpretability and reasoning infra for foundation models.	Active	1
Eos AI	Autonomous OS for healthcare	Active	2
Fed10	AI Agents for Government Affairs	Active	3
Fenrock AI	AI agents for banks	Active	2
Fern	RL environments for robotics companies	Active	2
Fixture	An AI-first CRM built for Startups	Active	5
Foreman	Keeping contractors on the job site, not behind a desk.	Active	2
Fort	Strength Tracking Wearable	Active	4
Forum	The first exchange to trade on attention.	Active	2
FullSeam	AI agents for corporate accounting teams	Active	3
Galactic Resource Utilization Space, Inc. (GRU Space)	Moon Hotel -> The Intergalactic Construction Company of Earth	Active	5
General Astronautics	Robotics for Space R&D	Active	2
General Legal	Elite AI law firm for high growth companies	Active	25
Grade	API for performance-based payroll	Active	2
Haladir	Operational Superintelligence for Global Logistics	Active	4
Hlabs	US-Made Parts for Robots	Active	1
Human Archive	Physical AI data lab	Active	100
IncidentFox	AI SRE agent that triages, coordinates, and fixes production incidents	Active	2
Instinct	Trade your instinct	Active	5
InventoryQuant	We automate the inventory process in insurance	Active	1
Inviscid AI	Real-time Physics Simulations for Industrial Facilities & Data Centers	Active	2
Jinba	Automate enterprise workflows through chat	Active	11
Khotan (formerly Pollinate)	FDE as a platform for rebuilding critical operations in software.	Active	2
Kita	Underwrite borrowers around the world in minutes	Active	3
Klaus AI	Fast and Safe OpenClaw on the cloud	Active	2
Lance	AI Agents That Run Hotel Operations.	Active	10
Laurence	Quantitative research for autonomous e-commerce growth	Active	2
LegalOS	The AI-Native Immigration Law Firm	Active	3
Lexius	AI for Corporate Security Cameras	Active	3
Lucent	AI that automatically improves products from user behavior	Active	2
Luel	Turning everyday words and actions into usable training data.	Active	12
Mango Medical	Foundation models for planning orthopedic surgery	Active	3
Mantis	Digital Twins of humans	Active	3
Martini	AI Video Production for Professionals	Active	2
Maven	Payments Infrastructure for Conversational Agents	Active	2
Maywood	The first finance-compliant proactive AI that runs 24/7	Active	5
Menza	The AI data analyst for consumer brands	Active	3
Milliray	Technology to detect and track small drones	Active	3
Mirabelle	Your robot chef	Active	2
MochaCare	Agentic Management Service for Care Organizations	Active	2
Moda	Harness Engineering Infrastructure that developers love.	Active	6
Moritz	Global AI-native law firm handling legal work with same-day turnaround	Active	10
MouseCat	AI to fight financial crime	Active	6
Ndea	Building AGI that can innovate.	Active	15
o11	The AI Data Warehouse For Financial Firms	Active	2
OctaPulse	CV and robotics to automate quality inspection in fish farms	Active	2
One Robot	World models for robot evals and training.	Active	2
Opalite Health	Helping Healthcare Providers Speak Any Language	Active	3
OpenSpec	Plan mode for complex features	Active	—
Origami Robotics	Manipulate Anything Robot	Active	5
Origin	AI and Data for Cancer Therapeutics	Active	4
Orthogonal	Agentic Payments for APIs	Active	2
Ossus	Intelligence for cultural institutions	Active	3
Overdrive Health	AI-Native Medical Billing Services	Active	1
Overshoot	AI Infra for real-time vision applications	Active	5
Oximy	Take command of the AI your company already runs on.	Active	8
Oxus	AI-powered automation for internal audit workflows	Active	3
Palus Finance	Your startup's financial advisor	Active	2
Panta	AI Native Commercial Insurance Brokerage	Active	3
Parameter	Security builds trust. Strengthen both, all on one platform.	Active	14
Patientdesk.ai	AI front & back office agent for dental practices	Active	5
Pax Historia	The first AI-powered worldbuilding and gameplay platform	Active	6
Payna	AI Licensing Agent for Regulated Industries	Active	2
Perfectly	The AI-native Recruiting OS	Active	4
Piris Labs	The Networking Layer of AI	Active	8
Pocket	Take Notes in the Real World	Active	15
Pollen	AI agents that automate customer success	Active	3
Polymath	Simulation environments to train & evaluate long-horizon AI agents	Active	6
Polymorph	Building secure polymorphic apps	Active	4
Prana	An AI primary care doctor in your pocket	Active	4
Protent	Real time intelligence for law enforcement & security teams.	Active	2
Proximitty	AI operating system for commercial loans	Active	2
Quotient Labs	Use Claude Code at 47% less cost in one line of installation.	Active	2
RamAIn	Automate any UI task with natural language	Active	4
Reframe	AI-native, hardware procurement marketplace	Active	1
Remix	Social media content auto-generated with your existing data	Active	—
Remy AI	Automating dexterous tasks in warehouses with AI-powered robots	Active	2
Ressl AI	Train, eval and build autonomous agents	Active	3
REV1	Claude Code for Mechanical Engineers	Active	2
Revion	Intelligence for Automotive Operations	Active	10
Rhizome AI	Agent Platform for Life Sciences	Active	1
Ritivel	AI-native platform for Life-Sciences Documentation	Active	3
Robby	AI agents that grow revenue for home services businesses	Active	3
RoboDock	Robots that run autonomous depots for autonomous fleets.	Active	4
Rubric AI	Reasoning and verification infra for AI	Active	1
Ruma Care	The operations stack for biologic infusion clinics	Active	5
RunAnywhere	Fastest inference anywhere: open models on-prem, hosted or on-device	Active	5
Salus	Guardrails to validate your agent's actions before they execute	Active	2
Samora AI	Multilingual voice agents that outperform humans	Active	8
Scheduling Wizard	Logistics infrastructure to modernize healthcare operations	Active	3
Seeing Systems	Modular AI-Commanded Drones for Defence	Active	7
Sentrial	Datadog for Agent Reliability	Active	2
Sequence Markets	Low-latency execution across crypto, prediction, and tokenized assets	Active	5
Servo7	Container unloading robots for warehouses	Active	3
Shofo	The World's Largest Video Library	Active	4
shortkit	Media infra for consumer apps	Active	2
Signals	iMessage revenue channel for DTC brands that brings customers back	Active	2
Sila	Messaging built for agents and teams	Active	2
Sitefire	Marketing suite for the agentic web	Active	2
Skillsync	Notion for AI chats	Active	2
Sparkles	Make everyone on your team an engineer	Active	1
Sponge	Financial infrastructure for the agent economy	Active	3
SpotPay	Stablecoin Global Bank Account	Active	2
Squid	AI agents for power grid planning 🦑	Active	3
Stilta	Agentic AI for intellectual property	Active	4
Strand AI	Multimodal foundation models to predict uncollected patient biology	Active	2
Synthetic Sciences	Infrastructure for Autonomous Science	Active	2
Talking Computers	Real-time interaction models for voice agents	Active	2
Tepali	AI EMR for medspas & wellness clinics	Active	2
Terminal Use	AI-native transformation for operations-heavy companies	Active	4
Terranox AI	The first AI-powered uranium discovery company	Active	2
The Token Company	Compression middleware that improves LLM outputs	Active	2
Traverse	Research lab solving non-verifiable work	Active	1
Travo	.	Active	4
Turnstone	Work with agents that already know you	Active	3
Unifold	Multi-chain deposit and payment infrastructure	Active	3
Unisson	AI agents that automate B2B software implementation	Active	2
Valence	Unified prediction markets trading platform	Active	3
Valgo	Insurance risk layer for physical AI	Active	3
Vector Legal	A premier AI-native law firm & legal operating system for Startups.	Active	7
Vela	AI Recruiting Coordinator for Executive Search	Active	2
Velum Labs	The OS for data quality across any stack	Active	2
Ventura	AI Workforce for Distributors and Manufacturers	Active	2
Verdex	AI Verification for Insurance	Active	2
Veriad	AI operating system for advertising	Active	2
Visibl Semiconductors	Custom silicon for power electronics	Active	3
Voltair	Autonomous Drones for Earth Observation	Active	5
Voxel Energy	Energy independent data centers with solar and repurposed batteries.	Active	3
VOYGR	Real-world place intelligence for AI apps and agents	Active	—
Wayco	AI operator for medlegal cases	Active	5
Wideframe	AI coworker for video editors to ship more video faster	Active	2
Zatanna	Turning all software into agent-first APIs	Active	2
ZeroSettle	Drop-in Direct Billing SDK for In-App Purchases	Active	2
Zymbly	The decision-support layer for aviation ops teams to know what to do…	Active	—
Kyten Technologies	Custom Aerospace-Grade Battery Packs	Inactive	2
Mendral	AI DevOps Engineer	Inactive	2
Q2Q	We help private equity teams find acquisition targets faster	Inactive	2

How this is measured

Measured 2026-09-26 from Y Combinator's company directory. Team size is the number YC lists for the company, where it lists one. Survival here means listed Active; Acquired and Public are shown separately because YC's listing does not say whether an acquisition was a good outcome.

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What happened to YC Winter 2026

Every company in Winter 2026

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