Companies250

Active100%

Acquired or public0%

Inactive0.4%

Y Combinator's directory lists 250 companies in the Summer 2026 batch: 249 Active, 0 Acquired, 0 Public and 1 Inactive. Summer 2026 is less than two years out, so its Inactive share (0.4%) 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.

What the directory lists about Summer 2026

By the industry YC files each company under: B2B 131, Industrials 57, Healthcare 22, Fintech 16, Consumer 15, Real Estate and Construction 6, Government 2, Education 1.
Where 250 of the 250 companies say they are based, by the first location each lists: San Francisco, CA, USA (180), San Francisco (21), New York City, NY, USA (11), Los Angeles, CA, USA (6), Boston, MA, USA (5), Los Angeles, CA (3), Helsinki, Finland (2), London, England, United Kingdom (2), and 19 other places.
Earlier names on the entries: 83 Sciences (earlier LabAlly); Aktoria Robotics (earlier Phi Robotics); Alkera AI (earlier Alkera AI, Inc.); Applied Electrodynamics, Inc. (earlier Applied Electrodynamics); Archal (earlier Archal Labs); Assemble (earlier Serin and Standard Interaction); Async (earlier Skope); Atlas Discovery (earlier Rhizome Bio); Atlia (earlier Odyssey); Audun (earlier Solvva); Autoresearch, Inc. (earlier hiloop); Avoca Systems (earlier Avoca); Axelrod (earlier Axelrod Labs Inc and Axelrod Labs); Baud (earlier Neuralyze, Cerelyze, Zener, Front, SuperCraft, Ponder and Baud Labs); Bear (earlier Last Accounting Company); and 97 more.
Status changes seen since tracking began on September 26, 2026: Mentlio, Active to Inactive (seen November 7, 2026).

Every company in Summer 2026

Company	What they do	Status	Team
6thSense	Nervous System for Physical AI	Active	4
83 Sciences	AI-native materials discovery powered by unpublished experimental data	Active	3
Aerogen Systems	Modernizing Chip Manufacturing Infrastructure	Active	4
Agency Tool Company	Reliable infrastructure to build, deploy and manage real-world robots.	Active	3
Agent FM	Self-optimizing inference cloud for faster, cheaper AI	Active	2
Agentcard	let agents buy anything online	Active	4
Agnost AI	We find where AI agents fail, then train better models to run them.	Active	2
Akon Labs	Databricks for Enterprise Codebases	Active	2
Aktoria Robotics	Human as API for robots	Active	2
Alkera AI	Reliable and safe data engineering and data science agents	Active	3
Allia Health	AI-Native Medical Group for Mental Health	Active	3
Alloovium	The company brain for construction companies	Active	5
Almanac	Organizing company knowledge	Active	3
Amorphic Labs	OpenRouter for Agent Tools	Active	2
Applied Electrodynamics, Inc.	A new kind of camera that can see through walls.	Active	5
Arbital	The social trading app for stocks, memes, and perps	Active	3
Archal	API sandboxes, built for AI agents	Active	2
Assemble	Autonomous IT Delivery	Active	4
Async	AI agents that run businesses	Active	2
Atlas Discovery	AI-native pharma company	Active	3
Atlia	The AI-native property management company for short-term rentals	Active	2
Atomarine	Floating nuclear powered data centers at sea.	Active	2
Audora	Audiobooks where every character has their own voice.	Active	1
Audun	AI-native debt collection company	Active	5
Autoresearch, Inc.	Autoresearch as a service: we solve your hardest measurable problems	Active	3
Avoca Systems	The AI operating system for radiology networks	Active	6
Axelrod	Hotels that run themselves	Active	2
Baud	AI chips for ultra-fast training and inference	Active	4
Bear	AI-native accounting firm.	Active	3
Belvedir	Autonomous AI Model Training	Active	2
Bernard	AI employees that run home appliance repair companies	Active	9
Billow AI Labs	AI-native Accounting Firm that's killing Deloitte	Active	—
Bizmark	OpenClaw for manufacturers	Active	2
Bloomy	AI-native learning for every school	Active	1
Buildbox	Benchmarks and RL environments for electrical engineering	Active	2
Callbook AI	AI collections agency for late stage portfolios	Active	7
Capto	Build something the government wants	Active	2
Care GP	AI agents to run primary healthcare operations	Active	10
CarSignal	The AI Operating System for Auto Shops.	Active	2
Caution	Hosting platform for software you can't afford to have hacked	Active	5
Cerenovus	AI-Driven Value Creation and Margin Expansion for Private Equity	Active	5
Chromie	Build something the government wants	Active	2
Click	Managed Agents API	Active	1
COACH	The AI Coach for in person sales reps.	Active	4
CoArena	The biggest crowdsourced benchmark for Computer-Use	Active	2
Codag	The AI gateway for cheaper, faster, permissioned agents.	Active	1
Computable	Derivatives Exchange for Compute	Active	2
Conifer	Intelligent decisions for critical AI operations	Active	4
Context.dev	Web data API for agents	Active	6
Control Seat	AI that runs factories.	Active	2
Cosmic Robotics	Autonomous construction on Earth and beyond	Active	8
Cova	Financial infrastructure for family caregiving	Active	2
CueBench	RL post-training for science reasoning and performance engineering	Active	3
Daqstra	AI-native test infrastructure layer for hardware companies	Active	3
Datoric	The training data R&D engine for physical AI	Active	2
Dawn Industries	Automatic Diagnosis & Fix for Industrial Automation Cells	Active	2
Decawork	Training company-specific models that approve AI actions.	Active	2
DeepReach Inc.	Network for Physical AI Data Business	Active	6
Definite	Connect operational data with finance to optimize how your business…	Active	3
Denta	Fortune 500 Dental Benefits	Active	1
Derya	AI Brokers for Industrial Trade	Active	2
Dialogus	voice AI agents that learn how your company actually works	Active	3
Dipole Labs	AI-controlled optical switching for AI clusters	Active	—
Dock	AI agents that run your business.	Active	2
Donkey	The AI-native trading company: factory prices, delivered, one number	Active	5
Dream	Using VLMs to Catch Damage	Active	2
Earendil Robotics	Drone swarm defence at a small-unit level	Active	7
Edgerun	Military exoskeletons	Active	12
EdotEnv	Building quant finance environments and services	Active	2
Edviro	AI That Operates Energy Infrastructure	Active	2
Egoist Machines	Your personal context, securely portable across every AI app.	Active	2
Ekho Labs	World Model for Freight	Active	—
Ekpa	Building Autonomous Research Agents for Trading	Active	2
Elite	Healthcare AI	Active	2
Enact	Real-world RL environments for robotics models	Active	2
Erinys	We help lawyers start and scale AI-native law firms.	Active	3
Ethos Space Resources	We make silicon on the Moon, to power everything in space.	Active	2
Evergrove	Instant healthcare for all, starting with work comp	Active	2
Executor	The open source tool gateway	Active	1
Exosat	Building a neutral, sovereign alternative to Starlink	Active	3
Experiential Labs	Open source AI gateway that turns your traffic into better models	Active	2
Fabraix	The world's frontier hacker of AI agents.	Active	2
Familiar	Real-Time AI Dubbing. Neolab for World Translation.	Active	8
Financial Datasets	Connect your agents to the stock market	Active	1
Floracene	Vibecode + deploy HIPAA-compliant internal tools, no eng team needed	Active	2
Florin	Florin is an AI-native insurance company that runs autonomously	Active	3
FlowManual	AI for Construction's Back Office	Active	2
Frontier Computing	Frontier grows scalable biological brains as an ML training substrate	Active	3
Gamgee	Curing cancer. Starting with dogs.	Active	2
General Context Labs	Building Products and Datasets for Frontier Models	Active	4
GitCafe	The Git forge for the next hundred billion commits	Active	2
Glen	Institutional Learning Layer for Every Agent in Your Company	Active	1
Graphify Labs	On-device Knowledge Graph engine for Enterprise Software	Active	1
Greypoint Industries	Building drone swarms that hunt hidden enemies.	Active	4
Grip	Robots for waste manipulation	Active	4
Grocalo	AI brain for creators that runs their social content	Active	2
GUILD	Making Defense Manufacturing Faster and Cheaper	Active	2
Gutgutgoose	We sequence your gut and build the probiotics it’s missing	Active	7
hardware intelligence	AI tools for the chips your AI runs on	Active	2
Hebbian Robotics	Foundational infrastructure for Physical AI	Active	2
HERA	We make sure every factory in the world builds without mistakes.	Active	2
hiloop	Autoresearch as a service: we solve your hardest measurable problems	Active	2
Hilstart	Autonomous Hardware Testing	Active	—
Hop Aero	Rocket cargo delivery to contested environments	Active	6
Hoplite	Effortlessly deploy cloud software factories.	Active	2
Hubble	AI-native retrieval engine for medical records	Active	2
HyperProbe	AI engineer that debugs and fixes production incidents in realtime	Active	8
Illume Labs	24/7 Personal Health & Longevity Companion	Active	3
IMPACT Drones	Air Defense as a Service for Civilian Infrastructure.	Active	2
Induction Labs	Building intellectually curious AI	Active	2
Inkbox	The identity and communication layer for AI agents	Active	3
Instaplay	Building Products and Datasets for Frontier Models	Active	4
Insurf	The AI-Native Decision Layer for Health Insurance	Active	3
Isengard Industries Inc	Mass-produced AI strike systems and Counter-UAS	Active	30
isoquant	Self-optimizing inference cloud for faster, cheaper AI	Active	2
Jcode	High performance coding agents	Active	1
Kara	Making Diamond Semiconductors	Active	2
Kebra	AI For The Skilled Workforce	Active	2
Lamb Labs	Lightning fast chips with hardcoded AI models	Active	—
Last Accounting Company	AI-native accounting firm.	Active	4
LATO	Predict how market participants behave	Active	2
LemonLime	Fully automated GTM for small business	Active	5
Levocred AI	AI Workforce for lenders	Active	2
Libra Robotics	The robot workforce for infrastructure of the AI era	Active	2
Litmus	Evals for humans	Active	4
Locke	The first AI government affairs firm.	Active	4
Luca IQ	API-first tax engine for CPA firms and developers	Active	5
Lumeria	Oura Ring for Skin	Active	3
Lyon	Foundation models on enterprise transaction data.	Active	2
machine0	AWS for Agents	Active	1
Magma	Monetize your agent's traces.	Active	1
Maingen	Simulating Agents Running Industrial Companies	Active	2
Manifold	Drop-in robotic labor that works on Day 1	Active	2
Marble	The autonomous back-of-house for restaurants.	Active	3
Marengo	AI-Native Engineering Firm designing Data Centers	Active	2
Marker	Platform + FDEs that rebuild enterprises agent-first	Active	3
Markov	Expert computer-use data for frontier AI labs	Active	2
Mass Magnetics	USA-made magnetics for robotics and defense.	Active	3
Meteoric	Drones that clear clouds over solar farms and weaken hurricanes	Active	2
Mireye	Search Engine for the Physical World	Active	2
Mochi	Watch and create anime	Active	5
MOCHI.TV	Watch and create anime	Active	3
Molagri	Resistance free pesticides.	Active	4
Moonshot	agents for the rest of us	Active	3
Mosaic	Defining the frontier of multiplayer AI.	Active	2
Most Robotic	Research lab building the most robotic household in the world	Active	2
Moving Atoms	Scan to 3D Model	Active	2
MusicArena	The crowdsourced benchmark for AI-generated music and music production	Active	—
Nebula Security	Autonomous AI defense system for cyber attack	Active	4
NebuSec	Autonomous AI defense system for cyber attack	Active	4
Neuromorphic	Building robots to automate wetlabs	Active	3
Neuron Industries	Industrial Controllers built for AI	Active	2
Nex	Grok bot for GTM & Revenue teams	Active	5
Nori	The most capable American-made humanoid robot for $1,688	Active	5
Olam Labs	Crafting simulations for frontier lab model training	Active	2
Omanta	A research lab for one	Active	6
OneCLI	AI teammates for your business-critical work.	Active	—
OneTriangle	Prefill optimizations for the fastest inference	Active	4
Ooak Data	We turn company data into training data	Active	5
OpenRelay	Distributed, hardware-agnostic AI inference	Active	2
OpenTag	Model Agnostic AI coworker in Slack	Active	3
OpenTrade	agents for the rest of us	Active	3
OpenVector	AI that turns any camera to an autonomous worker with real-time vision	Active	4
Operon	Agentic data layer for manufacturing & process industries.	Active	—
Orchestra	Self-optimizing neocloud that cuts LLM costs by 100x	Active	2
OS3	Affordable, intelligent humanoid robots built to deploy at scale	Active	2
Osmaura	AI-native client care for corporate law firms	Active	2
Osseus	Data research lab for aligned health and biological AI	Active	2
Pacific	Robotic factories to mass produce data centers	Active	6
Palette	The Media Engine of the AI Era	Active	2
Palisade	AI-native sales agents that run marketplaces	Active	1
Palisade	AI that finds and fixes OS-level vulnerabilities across device fleets	Active	1
Pango	Agentic OS for e-commerce operations	Active	5
Parasma	Replacing GPUs with human brain cells	Active	2
Peer	AI-native freight brokerage	Active	2
Pennant	The World Model for Corporate Governance	Active	2
Perceptron ML	We make law firms AI-native.	Active	2
Petrarch	Advancing model capabilities for critical infrastructure	Active	3
Pluto	LinkedIn for agents	Active	5
PokerClubHub	Host a Poker Club and Make Money	Active	—
Poth Labs	The customer brain that connects data to explain customer behavior	Active	2
Praxis Robotics	Turns real businesses into robotics data vendors	Active	3
Prescience, Inc.	Superintelligent health insurance that keeps employees healthy	Active	5
PRINCEPS	AI-native insurance company for the compute economy	Active	2
Prized	A cloud devbox that feels local	Active	3
Prodigy Research	Training the world's best AI model for quantitative finance.	Active	2
Proprio Robotics	Robots to maintain and assemble data centers	Active	1
ProvenMetal	AI-native electronics manufacturing for the American industrial base	Active	4
Qlo	Legora for commercial insurance carriers	Active	2
Radley	The AI-native radiology practice	Active	2
Rapidfolio	AI-native back-office for banks and fintechs	Active	—
Rasyn	Making chemicals 100,000x faster	Active	3
Rational	First Zero-human Accounting Firm	Active	2
RealPact	AI-native OS for Real Estate Brokerages	Active	2
rekursiv.ai	Scale AI scientists whose own breakthroughs accelerate the next.	Active	5
Rex	AI operations partner for enterprise order-to-cash	Active	2
Riften	Earned intelligence. An independent AI research lab.	Active	5
Rindler	The IDE for Tokenmaxxers	Active	2
Rise Reforming	We turn waste gases into supply-secure chemicals	Active	5
Risklytics	AI-Native Insurance for Frontier Tech	Active	2
Robocurve	Evals for robots	Active	3
RonanRx Inc.	Full Stack Pharmaceutical Company for Personalized Peptides and GLP-1s	Active	5
Salem Robotics Inc	Deploying robots to replace workers in hazardous spaces	Active	2
screenpipe	Turn your company's computer work into AI agents.	Active	2
Shielded	We help Fortune 500 companies hedge their supply chain risk	Active	—
Shiraz AI	Robots that learn on the job	Active	2
Sidekick	AI agent that manages manufacturing operations over text	Active	1
Skymerse	Autopilot for Flight Operations	Active	—
Snowstone	AI-Driven Value Creation and Margin Expansion for Private Equity	Active	—
SpaceFlow Technologies, Inc.	AI-native procurement services for the physical economy	Active	4
Spectre Intelligence	We are a multi-strategy trading firm that trains AI traders.	Active	2
Speko	OpenRouter for Voice AI: one API, every call on the best speech model	Active	4
Standard Machines	Teaching AI to Design Chips	Active	—
Stoa	The market behind AI hardware.	Active	3
Stratum Industries	Healthcare AI	Active	2
Studio	Accurately simulate market response at scale	Active	2
SubVysion	Autonomous rovers to make the ‘Google Maps’ of underground utilities	Active	2
Sunflower	We are building an AI-native telemedicine clinic for addiction. 🌻	Active	15
Synapse Semiconductor	New semiconductors that merge compute and vision	Active	2
TareBio	Vaccines for any cancer or infection in weeks.	Active	1
Tarifflo Inc.	Supply chain compliance and cost savings	Active	5
tash	The S&P of Trading Cards	Active	4
Tenor	Infrastructure for building and scaling AI-native businesses.	Active	3
Tensr	Robotic factories that build robots	Active	7
Tokenless	We find flaws in RL environments and evals and help you fix them.	Active	3
Torus	Superintelligence for Infrastructure	Active	8
Touchmark	Market for future inference capacity	Active	2
Touchy	We find flaws in RL environments and evals and help you fix them.	Active	3
TovenAI	AI agents for compliance at institutional trading firms	Active	2
Traceforce	CrowdStrike for AI Agents	Active	2
Tracer	Combining open-source AI models for better answers at lower cost	Active	1
Trident	Autonomous offensive security agents. The best defense is offense	Active	4
Trope	AI FDE that deploys custom AI agents into ERPs	Active	2
TryNearby	Local creators for local businesses	Active	5
Tsenta	AI career agent that finds matching jobs & applies on your behalf	Active	2
Ultrasonium	Metal manufacturing, faster, cheaper, and more versatile.	Active	5
Understudy Labs	Self-optimizing neocloud that cuts LLM costs by 100x	Active	2
Vendo	Legora for AEC (Architecture, Engineering, & Construction) firms	Active	2
Verdant	AI Agents to Make Local Gov Efficient	Active	2
Verdict Machine	AI cybersecurity for financial institutions' digital assets	Active	4
Vernius Systems, Inc.	Mass-deployable radars for air defense	Active	3
Vestris	AI native platform for real estate closings	Active	2
Waddle Labs	LLMs that control robots	Active	2
Waybill	Agentic procurement & inventory for deep tech teams.	Active	3
Whitespace	AI Operating System for Wholesale Distribution	Active	2
Wondering	Duolingo for learning anything	Active	2
WonderTx	Extrapolative AI to unlock First-in-Class drugs	Active	3
Zaplar	Agentic Hotel Operating System	Active	7
Zomma	The AI BPO for financial servies, run by computer-use agents	Active	5
Mentlio	Engineering Intelligence and Token Optimization for the AI-Coding Era	Inactive	—

How this is measured

Measured 2026-11-10 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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Every company in Summer 2026

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