Y Combinator (YC)

Activity from announced rounds

Activity in this selectionSeries A

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
52
Confirmed lead rounds
0
33 roles undisclosed
New companies
52
First participation on record · 0 follow-on
Funding in participating rounds
$1.5B
51 disclosed · full round size, not this investor’s share

By stage

Series A52

By primary sector

Fintech11
AI8
Enterprise software7
Healthtech6
Developer tools4
11 more
Proptech3
Biotech2
Mobility2
Space tech2
Cybersecurity1
Defense tech1
Ecommerce1
Edtech1
Hardware1
Logistics1
Robotics1

By country

United States40
2
Belgium2
France2
Brazil1
5 more
Canada1
Germany1
Saudi Arabia1
Switzerland1
United Kingdom1

Rounds

52 in this selection
Clueso

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

$10MSeries A
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
Spott

Spott provides recruitment agencies with an applicant-tracking and customer-relationship system for candidate search, outreach and hiring workflows.

$21MSeries A
Participant
Raindrop

A monitoring and reliability platform that detects failures in production AI agents, investigates their causes and helps developers prevent repeats.

UndisclosedSeries A
Participant
Kastle

AI agents for banks and lenders that automate routine lending and loan-servicing work across existing systems.

$24MSeries A
Participant
Blee

Blee gives legal, compliance and marketing teams an AI-assisted system to review promotional content against their rules before publication and monitor websites, social media and partner channels afterward.

$20MSeries A
Participant
Sirdab

Sirdab connects businesses with warehouse and transport capacity across Saudi Arabia and the GCC, while helping providers and shippers coordinate inventory, orders and service quality.

$10MSeries A
Participant
Wafer

Wafer runs AI inference infrastructure that adapts a model-serving stack to each customer's workload. It benchmarks and tunes models, engines, kernels and available hardware together, then keeps optimizing live serving for latency, reliability and cost as traffic changes.

$40MSeries A
Participant
Conveo

An AI-led consumer research platform that conducts video interviews and turns responses into searchable insight for product, marketing and strategy teams.

$50MSeries A
Participant
Metriport

Open-source healthcare data infrastructure unifying patient records for clinicians

$26MSeries A
Role not disclosed
Pluggy

Pluggy provides banking-data and payment APIs that help software companies embed financial services into their products.

$3.5MSeries A
Participant
Adaptyv Bio

Adaptyv Bio runs automated laboratory experiments that help protein designers test their sequences and use measured results to improve the next design.

$40MSeries A
Participant
Thunder Compute

Thunder Compute virtualizes GPUs so multiple workloads can share capacity and data centers can use existing hardware more efficiently.

$13MSeries A
Participant
Axle

AI-native clearinghouse automating insurance verification and policy workflows

$17.5MSeries A
Role not disclosed
Naïve

Naïve provides the accounts, tools and runtime infrastructure that AI agents need to operate business workflows.

$28.5MSeries A
Participant
Andromeda Surgical

Andromeda Surgical develops autonomous surgical robots combining anatomical mapping and surgeon oversight, initially for prostate enucleation.

$15MSeries A
Participant
Terminal

Provider of unified telematics integration technology transforming operations across insurance, fleet management and logistics companies

$20MSeries A
Role not disclosed
Henry AI

AI platform automating back-office knowledge work for commercial real estate teams

$16.5MSeries A
Role not disclosed
Healia

Healia is a healthcare benefits platform built for dual-income families.

$14MSeries A
Role not disclosed
Singularity

Building a safer world by deploying low-cost air defense systems at scale

$80MSeries A
Role not disclosed
Agave

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

$15MSeries A
Role not disclosed
Coval

Provides evaluation platform for voice AI quality

$28MSeries A
Role not disclosed
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
Lucis

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

$20MSeries A
Role not disclosed