Y Combinator (YC)

Activity from announced rounds

Activity in this selectionOct 16, 2026 · Jul 19, 2026
Rounds participated in
50
Confirmed lead rounds
3
18 roles undisclosed
New companies
49
First participation on record · 1 follow-on
Funding in participating rounds
$2.4B
44 disclosed · full round size, not this investor’s share

By stage

Seed20
Series A13
Pre-seed6
Series B4
Series C+4
1 more
Undisclosed3

By primary sector

Developer tools9
Enterprise software7
AI6
Fintech6
Biotech4
9 more
Healthtech4
Robotics3
Business services2
Defense tech2
Proptech2
Space tech2
Climate tech1
Ecommerce1
Mobility1

By country

United States43
United Kingdom2
1
Canada1
Germany1
2 more
Poland1
Sweden1

Rounds

50 in this selection
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
flowscope

flowscope automates enterprise work by connecting business processes and using AI to reduce repetitive operational tasks.

$3.8MSeed
Participant
WonderTx

AI models designed to discover oral medicines for diseases currently treated with injectable drugs.

$125KSeed
Participant
Hubble Network

Hubble Network connects ordinary Bluetooth devices to satellites, extending asset tracking beyond the reach of cellular networks.

$200MSeries C
Participant
Numeral

AI-powered software that automates sales tax and VAT compliance for global businesses.

$100MSeries C
Participant
Confido

Confido connects accounting, finance, sales and operations data so consumer brands can manage deductions, trade spending and supply plans together.

$55MSeries B
Participant
StarSling

Fast GitHub Actions runners paired with AI agents that optimize continuous integration workflows.

UndisclosedPre-Seed
Participant
CatchBack Cards

CatchBack turns physical trading cards into a digital mystery-pack marketplace. Customers can open packs, see transparent odds and use trading and instant buyback features that make collectible pricing and resale more accessible.

$7.8MSeed
Participant
Robocurve

Independent benchmarks that test how well AI models control real robots.

$10MSeed
Participant
TesterArmy

AI agents that automate software testing and help teams improve application quality.

€1MPre-Seed
Lead
Metal

An AI fundraising workspace that helps founders identify investors, research firms and manage venture rounds.

$4.5MSeed
Lead
Kalinda

Kalinda uses AI to help plaintiff-side class action and mass tort firms review case information and qualify potential claims.

$500KPre-Seed
Participant
Huscarl

An AI actuarial platform that helps companies model and manage risks retained through their own insurance captives.

$5.6MSeed
Participant
Metriport

Open-source healthcare data infrastructure unifying patient records for clinicians

$26MSeries A
Role not disclosed
Arintra

AI platform automating medical coding and revenue assurance for health systems

$25MSeries B
Role not disclosed
Multiplier

Builds AI agent harnesses for asset managers' proprietary research and data

$6MSeed
Role not disclosed
MorphoAI

Foundation models for understanding, designing and controlling hardware and physical systems.

UndisclosedPre-Seed
Participant
Kita

AI software that extracts and verifies financial documents to help lenders assess borrowers.

$4.5MSeed
Participant
Apollo Atomics

Apollo Atomics develops compact pressurized-water reactors designed for factory manufacturing.

$31MSeed
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
Hypercubic

AI agents that map, document and modernize legacy COBOL applications.

$5.3MSeed
Participant
StableBrowse

A machine-native browser engine that turns websites into structured workflows AI agents can execute.

$125KSeed
Participant
Gamgee

Gamgee develops personalized mRNA vaccines for dogs with cancer, designed from the genetic profile of each dog’s tumor.

$4MSeed
Participant