Y Combinator (YC)

Activity from announced rounds

Activity in this selectionOct 31, 2026 · Oct 1, 2026

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
14
Confirmed lead rounds
0
All roles disclosed
New companies
13
First participation on record · 1 follow-on
Funding in participating rounds
$524.5M
13 disclosed · full round size, not this investor’s share

By stage

Series A6
Seed3
Series B2
Series C+2
Undisclosed1

By primary sector

Enterprise software3
AI2
Developer tools2
Industrial tech2
Agritech1
4 more
Biotech1
Defense tech1
Healthtech1
Mobility1

By country

United States9
United Kingdom2
1
Canada1
France1

Rounds

14 in this selection
Tractian

Industrial asset monitoring company combining sensors and AI to diagnose equipment problems and guide maintenance.

$130MSeries D
Participant
Blacksmith

Cloud infrastructure for building and testing software through continuous integration workflows.

$66MSeries C
Participant
Greptile

Greptile builds an AI code-review and validation platform that checks software changes against the context of a team’s codebase.

$50MSeries B
Participant
Molagri

Molagri develops targeted crop-protection products for growers facing pesticide resistance.

Participant
Clueso

Clueso helps business teams create and maintain product videos, training content and accompanying documentation.

$10MSeries A
Participant
HyLight

HyLight operates autonomous airships and inspection software that help energy and transport operators locate defects across their infrastructure.

€13MFunding round
Participant
Nous Research

Open-source AI models and the Hermes agent, which retains project memory and reusable skills across tasks.

$90MSeries B
Participant
Santé

Santé gives wine and spirits retailers one system for in-store sales, e-commerce, delivery orders, marketing and subscriptions.

$15MSeries A
Participant
Flai

Flai gives automotive dealerships AI tools to answer customer calls, capture leads and schedule sales and service appointments.

$27MSeries A
Participant
Vitalize

Vitalize helps hospital teams coordinate staffing and capacity as patient demand shifts.

$31MSeries A
Participant
Halluminate

Training environments and benchmarks that measure how AI agents perform financial services work.

$30MSeries A
Participant
Hop Aero

Develops autonomous hypersonic cargo rockets for military micro-payload delivery.

$11MSeed
Participant
Revnu

AI agents that run growth marketing, advertising and search optimization for software companies.

$3MSeed
Participant