Six months of YC, measured
Every company in the Y Combinator directory as it stood on 2026-02-28, compared against the live directory on 2026-08-20. This is what actually happened to a cohort of 5,737 startups over half a year.
662
added to the directory
64
acquired
57
marked inactive
555
repositioned their pitch
210
delisted
Outcomes by cluster
Of the classified companies present in February, how many were acquired, went inactive, or rewrote their pitch. Clusters with at least 20 companies.
| Cluster | In February | Acquired | Inactive | Rewrote pitch |
|---|---|---|---|---|
| Consumer | 787 | 1 | 4 | 35 (4%) |
| B2B SaaS | 756 | 10 | 9 | 68 (9%) |
| Vertical AI agents | 710 | 14 | 7 | 188 (26%) |
| Fintech | 596 | 8 | 6 | 45 (8%) |
| Developer tools | 476 | 5 | 5 | 47 (10%) |
| Healthcare and bio | 445 | 4 | 5 | 37 (8%) |
| Commerce and marketplaces | 419 | 4 | 5 | 22 (5%) |
| Robotics and physical world | 253 | 2 | 3 | 32 (13%) |
| Agent infrastructure | 244 | 7 | 2 | 99 (41%) |
| Security and compliance | 171 | - | 2 | 23 (13%) |
| Data for AI | 167 | 1 | 2 | 23 (14%) |
| Horizontal AI assistants | 129 | 3 | 3 | 29 (22%) |
| Climate and energy | 118 | - | 2 | 4 (3%) |
| AI infra and compute | 117 | 3 | 2 | 24 (21%) |
| Defense and space | 63 | - | - | 9 (14%) |
| Other | 44 | 1 | - | 1 (2%) |
Repositioning
Active companies whose public one-liner changed beyond a copy edit, ranked by how little the old and new wording overlap. A rewrite is a signal, not proof, of a pivot - but the sharpest ones usually are.
F25 · Data for AI
AI Co-Scientist that automates ML experimentation and analysis.
Expert STEM reasoning data for frontier AI labs.
F25 · Agent infrastructure
The world's first human superintelligence community
Training Data for Recursive Self-Improvement
S24 · Horizontal AI assistants
The world's first vibe working platform
AI Employees for the Enterprise
W25 · Developer tools
AI platform enabling anyone to build and scale software businesses
Claude Code plugin that reduces token consumption and cost by 50%
S14 · Vertical AI agents
AI-powered sales solution based on your best customers
The AI Command Center for outbound and ABM
F24 · Agent infrastructure
The first AI-native document editor for long-form content
The best DOCX MCP for agents to edit microsoft word documents
S24 · Developer tools
Deploy to Kubernetes in minutes
Verify AI-generated code before you ship it
W23 · Vertical AI agents
AI to auto-analyze all your customer communications
Social listening for the video era
S23 · Healthcare and bio
Predictive analytics and automation for medical claims
AI Agents for Healthcare RCM
S23 · Developer tools
Developer toolkit for building collaborative apps.
The open-source document editor for humans and AI agents.
X25 · Developer tools
Cursor for DevOps
Self-Driving CI: fast AI-native GitHub Actions runners
W23 · Robotics and physical world
AI "co-scientists" for battery design & manufacturing
Ohm helps engineering teams accelerate hardware development & testing.
S24 · Consumer
Bloodwork and personalized insights to help you live longer
At-cost lab testing marketplace that profits when you test less
W26 · Agent infrastructure
Automating RL environment generation
Simulation environments to train & evaluate long-horizon AI agents
W26 · Agent infrastructure
Super fast computer-use agents to build AI employees.
Automate any UI task with natural language
S24 · Vertical AI agents
Turn diagrams, technical documents, and CAD into structured data
EDA for Industrial Control Systems
S24 · Vertical AI agents
Model-agnostic AI for enterprises: governed, embedded, decision-grade.
Capitol: the sovereign operating system for intelligence.
S24 · Vertical AI agents
AI Workforce that does it all
Workspace for your AI Agents, Build any Workflow.
S24 · Horizontal AI assistants
AI Assistant that works alongside you in your Chrome browser
AI agents for high-value professional work
S24 · Vertical AI agents
AI Copilot for SMEs & their accountants in Europe
Autonomous Accounting Software
S24 · Fintech
AI copilot for growing, organizing, and transferring family estates
Estate settlement, from verified discovery to distribution
S24 · Vertical AI agents
Global Venmo for cross border payments
Agentic Finance for your Life and Business
W26 · Vertical AI agents
Shortening hardware design cycles by automating post-CAD work
Claude Code for Mechanical Engineers
S23 · Healthcare and bio
AI-generated binders for targeted drug delivery
Deliver genes to any cell with AI
S23 · Fintech
AI agents for financial compliance (AML, KYC and Sanctions)
AI-native operations for the banks
S24 · Agent infrastructure
Scale human-in-the-loop for AI workflows in regulated industries
Java-native multi-agentic AI operating system for enterprise
W24 · Horizontal AI assistants
Character AI + Roblox :persistent, sapient AI characters in 3D worlds
AI applied research lab building synthetic sapience; human-like AI
W17 · Commerce and marketplaces
Connects workplaces with professionals nearby.
Every shift, Covered.
W18 · Commerce and marketplaces
OpenSea is theOpenSea is the best place to trade everything onchain —…
This isn't just a marketplace; we're shaping the future of digital…
W26 · Agent infrastructure
Production Monitoring for AI Products
Datadog for Agent Reliability
Acquired
Status moved to acquired since February (64 companies).
- Remedy · Vertical AI agentsF25
- Metis · Agent infrastructureS25
- Nexa Labs · Robotics and physical worldS25
- Opennote · Horizontal AI assistantsS25
- Galen AI · Vertical AI agentsX25
- TensorPool · AI infra and computeW25
- ZeroEntropy · AI infra and computeW25
- Central · Vertical AI agentsS24
- Midship · Vertical AI agentsS24
- Browser Buddy · ConsumerW24
- Lumetric · Vertical AI agentsW24
- Sample · Healthcare and bioW24
- Speck · Horizontal AI assistantsW24
- Tusk · Developer toolsW24
- CheqUPI · FintechS23
- Continue · Developer toolsS23
- Dioxus Labs · Developer toolsS23
- Fragment · B2B SaaSS23
- Glide · FintechS23
- Mocha · Developer toolsS23
- Cobblestone · B2B SaaSW23
- Fintool · Horizontal AI assistantsW23
- Helicone · Developer toolsW23
- Mulligan · Vertical AI agentsW23
- No Cap · Vertical AI agentsW23
Went inactive
Active in February, marked inactive today (57 companies).
- Kyten Technologies · Robotics and physical worldW26
- Dome · Commerce and marketplacesF25
- Rovr · Developer toolsF25
- Percival · Data for AIX25
- Altrina · Vertical AI agentsW25
- Baseline AI · Vertical AI agentsS24
- Lilac Labs · Vertical AI agentsS24
- Pre · Horizontal AI assistantsS24
- Aedilic · Security and complianceW24
- Glimmer · Data for AIW24
- K-Scale Labs · Robotics and physical worldW24
- Tesseral · Agent infrastructureW24
- Thorntale · Horizontal AI assistantsW24
- Atla · Agent infrastructureS23
- Leafpress · Climate and energyS23
- Synch · B2B SaaSS23
- Fetchr · ConsumerW23
- Gluetrail · Developer toolsW23
- Homeflow · B2B SaaSW23
- Peeba · Commerce and marketplacesW23
- rift · B2B SaaSW23
- Turntable · Developer toolsW23
- Almond · Healthcare and bioS22
- Alima · Commerce and marketplacesW22
- Livedocs · B2B SaaSW22
Added since February, by batch
New entries in the directory - the newest batches filling up, plus late additions to older ones.
Recently raised
Funding rounds extracted from news feeds. A batch tag means the company is in the radar directory - graduation happening in real time.
series-a · Other · 2026-04-01
seed · Healthcare and bio · 2026-04-01
unknown · Other · 2026-03-31
series-c · Fintech · 2026-03-31
series-a · Healthcare and bio · 2026-03-31
series-a · Climate and energy · 2026-08-18
unknown · AI infra and compute · 2026-08-18
unknown · Robotics and physical world · 2026-08-17
unknown · Defense and space · 2026-08-17
unknown · B2B SaaS · 2026-08-17
Survival by accelerator
Share of companies whose website still answers. Only YC publishes company statuses; a dead site is the one survival signal measured identically across every program. "Alive" includes sites behind bot walls.
| Program | Sites alive | Alive | Checked | 3y+ cohorts alive |
|---|---|---|---|---|
| Y Combinator | 86.3% | 5,303 | 6,145 | 81.8% |
| Plug and Play | 79.5% | 4,298 | 5,407 | - |
| Techstars | 84.5% | 3,710 | 4,391 | 82.9% |
| 500 Global | 83.4% | 1,833 | 2,197 | 82.7% |
| SOSV | 82.2% | 644 | 783 | - |
| a16z speedrun | 95.3% | 221 | 232 | - |
Sweep covers companies with a known domain; unreachable can mean slow hosting, so treat shares as an upper bound on mortality, not an exact one. The 3y+ column keeps only cohorts old enough to have had time to die.
snapshot: accelerator export 2026-02-28 · live: YC public directory, synced daily · site liveness swept in-house