Y Combinator (YC)

Activity from announced rounds

Activity in this selectionUnited States

Y Combinator funds early-stage startups through a three-month accelerator in San Francisco, with four batches a year and a standard $500,000 investment for accepted companies.

The investment consists of $125,000 for 7% of the company and $375,000 on an uncapped SAFE with a most-favoured-nation provision. The second SAFE adds to YC’s ownership when it converts, so the full $500,000 is not exchanged for a fixed 7% stake.

During the batch, founders work with YC partners in individual and group office hours, build toward Demo Day and use the alumni community for feedback, hiring and introductions. Companies can apply before launch; YC also accepts businesses that already have users and revenue.

Sources
Rounds participated in
128
Confirmed lead rounds
3
85 roles undisclosed
New companies
126
First participation on record · 2 follow-on
Funding in participating rounds
$7.4B
121 disclosed · full round size, not this investor’s share

By stage

Series A40
Seed36
Series C+19
Series B18
Undisclosed9
1 more
Pre-seed6

By primary sector

AI26
Fintech24
Healthtech15
Developer tools14
Enterprise software14
13 more
Biotech5
Space tech5
Proptech4
Robotics4
Cybersecurity3
Defense tech3
Business services2
Ecommerce2
Logistics2
Mobility2
Climate tech1
Edtech1
Hardware1

By country

United States128

Rounds

128 in this selection
Starcloud

Builds orbital data centers running AI GPU compute in space

$170MSeries A
Role not disclosed
Conntour

Provides AI-powered video surveillance platform for security personnel

$7MSeed
Role not disclosed
Glimpse

Provides AI-powered platform to automate financial deduction processes for retailers

$35MSeries A
Role not disclosed
Lucid Bots

Lucid Bots develops autonomous exterior-cleaning robots and software for professional cleaning businesses.

$20MSeries B
Role not disclosed
Mandel AI

Develops AI supply chain coordinator to automate supplier communication and procurement

$3.9MSeed
Role not disclosed
Conduit

Provides AI-powered dock and yard management systems to automate warehouse shipping and receiving

$6MSeed
Role not disclosed
Spade

Data and AI platform transforming how financial institutions use transaction data

$40MSeries B
Role not disclosed
Laminar

Open-source observability platform for tracing and debugging long-running AI agents

$3MSeed
Role not disclosed
Understood Care

Combines human advocates and AI-powered automation to deliver personalized patient advocacy at scale

$8.4MPre-Seed+Seed
Role not disclosed
Gumloop

Provides AI-powered automation tools for non-technical employees to build and deploy autonomous agents

$50MSeries B
Role not disclosed
Replit

Provides AI-powered development platform for software creation and deployment

$400MSeries D
Role not disclosed
Juicebox

Develops AI recruiting software for finding and contacting candidates before they apply.

$80MSeries B
Role not disclosed
Escape

Develops AI agents to automate security testing and remediation across the development lifecycle

$18MSeries A
Role not disclosed
Science Corporation

Develops brain-computer interface retinal implants to restore vision in patients with retinal diseases

$230MSeries C
Role not disclosed
14.ai

14.ai built a managed AI customer-service business; its founding team now operates GloGlo, focused on type 1 diabetes.

$3MSeed
Role not disclosed
Trace

Builds workflow orchestration systems to provide context for AI agents in enterprises

$3MSeed
Role not disclosed
Dots

Provides a payouts API for marketplaces to pay workers and creators across payment rails globally

$8.9MSeries A
Role not disclosed
Encord

Provides AI-native data infrastructure for physical AI systems

$60MSeries C
Role not disclosed
Harper

AI-native commercial insurance brokerage matching small businesses with carriers for coverage

$46.8MSeed+Series A
Role not disclosed
Letter AI

Provides AI-native revenue enablement platform for go-to-market teams

$40MSeries B
Role not disclosed
Onshore

Builds AI-powered platform to help businesses claim and defend tax incentives like R&D credits with automation and expert review

$31MSeries B
Role not disclosed
Sphinx

Builds browser-native compliance agents for financial institutions

$7.1MSeed
Role not disclosed
Bretton AI

Provides AI agents for financial crime operations in regulated financial institutions

$75MSeries B
Role not disclosed
Simple AI

Builds voice AI agents to automate inbound phone calls for sales and support

$14MSeed
Role not disclosed
Pasito

Builds AI-native workspace for group health life and retirement benefits operations

$21MSeries A
Role not disclosed
Poetiq

Develops AI meta-system to enhance LLMs for problem-solving

$45.8MSeed
Role not disclosed
BoldVoice

Provides AI-powered voice coaching for non-native English speakers

$21MSeries A
Role not disclosed
Emobi

Emobi provides EV charging connectivity across networks.

$3.4MSeed
Role not disclosed
Concourse

Builds AI agents for corporate finance teams to automate manual operations

$12MSeries A
Role not disclosed
Mine

Provides AI-powered personal finance tools for young adults

$14MSeries A
Role not disclosed