Y Combinator (YC)

Activity from announced rounds

Activity in this selectionAI

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
107
Confirmed lead rounds
2
90 roles undisclosed
New companies
107
First participation on record · 0 follow-on
Funding in participating rounds
$6.3B
104 disclosed · full round size, not this investor’s share

By stage

Series A35
Seed29
Series B18
Series C+15
Undisclosed7
1 more
Pre-seed3

By primary sector

AI31
Fintech18
Healthtech16
Enterprise software13
Developer tools11
12 more
Cybersecurity3
Proptech3
Ecommerce2
Logistics2
Biotech1
Climate tech1
Defense tech1
Edtech1
Hardware1
Mobility1
Robotics1
Space tech1

By country

United States88
France4
Germany4
Sweden4
Belgium2
3 more
India2
United Kingdom2
1

Rounds

107 in this selection
Hadrius

Hadrius provides an AI-native compliance infrastructure for financial services firms

$27MSeed+Series A
Role not disclosed
Ollama

Ollama provides tools for developers to use open AI models.

$65MSeries B
Role not disclosed
Finto

Builds AI agents for autonomous accounting tasks

$3.4MSeed
Role not disclosed
Fleek

Develops AI infrastructure for secondhand clothing industry

$25MSeries B
Role not disclosed
Agave

Automates accounting and back-office work for construction contractors using AI

$15MSeries A
Role not disclosed
Sazabi

AI-native observability platform for fast-moving engineering teams

$8MSeed
Role not disclosed
Coval

Provides evaluation platform for voice AI quality

$28MSeries A
Role not disclosed
Taktile

Enables financial institutions to automate and optimize decisions with AI

$110MSeries C
Participant
JustAI

Automates personalization, experimentation, and decisioning for enterprise marketing teams at scale

$17MSeries A
Role not disclosed
Prosper AI

Automates the patient journey from scheduling and insurance to billing and collections

$30MSeries A
Role not disclosed
Flagright

AI operating system for financial crime compliance unifying transaction monitoring, screening, case management, and governance

$12.5MSeries A
Role not disclosed
Bland

Provides voice AI for complex, high-stakes conversations

$50MSeries C
Role not disclosed
F2

An AI workflow platform for institutional credit screening, underwriting and portfolio monitoring.

$14MSeed+
Role not disclosed
Stepful

Offers accelerated, affordable training for healthcare careers

$55MSeries C
Role not disclosed
Supabase

Provides an open source Postgres platform with databases, authentication, storage and application backend services.

$500MSeries F
Role not disclosed
Upstream

Upstream is a collaborative inbox where people and AI agents organize messages and coordinate work across shared email conversations.

$3MPre-Seed
Role not disclosed
Triomics

Building AI infrastructure to turn complex cancer records into structured intelligence

$22MSeries B
Role not disclosed
Lucis

Lucis offers preventive-health analysis using more than 110 blood biomarkers and personalized AI-generated insights.

$20MSeries A
Role not disclosed
Blank Bio

Trains RNA foundation models on tumor transcriptomes to improve patient-level prediction in oncology

$7.2MSeed
Role not disclosed
Stilta

Automates research and analytical work behind intellectual property cases

$10.5MSeed
Role not disclosed
Nourish

Provides AI-native metabolic health care with dietitians and virtual medical services

$100MSeries C
Role not disclosed
Status AI

Builds a gamified social simulation platform where users roleplay characters inside AI-generated social worlds

$17MSeries A
Role not disclosed
Flick

AI-native filmmaking platform giving creators cinematic control to direct AI-generated films

$6MSeed
Role not disclosed
Greenboard

Provides AI-native platform for securities compliance in financial institutions

$20MUndisclosed
Role not disclosed
Fazeshift

Deploys AI agents to automate accounts receivable workflows for finance teams

$17MSeries A
Role not disclosed
Moritz

Combines AI with lawyers to deliver commercial legal services with same-day turnaround

$9MPre-Seed
Role not disclosed
Corvera

Provides agentic supply chain management platform for CPG brands

£3MSeed
Role not disclosed
Hightouch

Provides data and AI for marketing

$150MSeries D
Role not disclosed
Astor

Provides AI-powered investment guidance and advisory services

$5MSeed
Role not disclosed