Companies funded by Y Combinator

RS

Resend

Email for developers

FL

Fly.io

Run full stack apps close to your users.

AS

Ashby

All-in-one recruiting platform that empowers hiring excellence in…

RC

Raycast

Speed up non-coding tasks for engineering teams

MT

Modern Treasury

Payment operations tools for money movement.

IN

Increase

API-first banking for ambitious technology companies.

SS

Substack

A place for independent writing.

PH

PostHog

The single platform to analyze, test, observe, and deploy new features

NU

Nourish

Telehealth dietitians covered by insurance

8S

Eight Sleep

The sleep fitness company.

DP

Doppler

Secure secrets. Prevent breaches. Keep teams moving.

IF

Infisical

Unified platform for secrets, certs, and privileged access management

RT

Retool

Build internal tools fast.

TR

Trigger.dev

Build and deploy fully‑managed AI agents and workflows

TL

Tella

The all-in-one screen recorder.

MI

Mintlify

The intelligent knowledge platform

RM

ReadMe

Beautiful, personalized, interactive developer hubs

OS

OpenSea

This isn't just a marketplace; we're shaping the future of digital…

SZ

SigNoz

Open source alternative to DataDog

LF

Langfuse

Open source LLM engineering platform

AS

AssemblyAI

The best way to build Voice AI apps

DG

Deepgram

Building foundational AI for speech transcription and understanding.

FH

Fathom

The most flexible AI meeting notetaker ever built.

MX

Mixpanel

Mixpanel is event analytics for builders that need answers.

HT

Hightouch

The leading Composable CDP and AI Decisioning platform

AB

Airbyte

Context layer for production-grade AI agents

CD

ClassDojo

Communication app for K-8 teachers, kids, and families

PV

Pave

Plan, communicate, and benchmark your compensation in real-time.

VC

Vouch

Insurance and risk management tools for startups and growth-stage…

KR

Karat

Better financial services for creators

BC

Beacons

An AI-powered, all-in-one business platform for content creators

AP

Apollo.io

Apollo is the foundation of your entire go-to-market strategy.

MU

Mutiny

Your AI agent for creating anything customer-facing, in minutes.

JR

Jasper

Jasper is a leader in creating content using Artificial Intelligence

TV

Tavus

Building the human layer of AI

PR

PhotoRoom

Power commerce photography with generative AI

VY

Vidyard

Video for business.

G1

Go1

A learning platform that enables you to train your staff or customers.

AS

Aspire

All-in-one Finance OS for businesses

CO

Confido

AI infrastructure for CPG brands.

CO

Conveo

Confident decisions in days with AI-led interviews.

WA

Wafer

AI that makes AI fast.

NA

Naïve

Autonomous companies.

HE

Henry

The AI deal platform for commercial real estate brokers.

TE

telli

AI phone calls that convert.

MU

Multiplier

AI for asset managers.

DP

Depot

Software delivery built for machine scale.

LP

Loops

Email sending for software companies

JV

Jeeves

International banking infrastructure for global startups.

CW

Chatwoot

The modern, open source, self-hosted AI customer support platform

AQ

AfterQuery

Applied research lab curating data solutions for foundation model…

HC

Helicone

LLM Observability for Developers

EX

Exa AI

Web search rebuilt for LLMs

FC

Firecrawl

The web data API for searching and scraping. 🔥

VL

Vellum AI

LLM product development and evaluation platform

IN

Instant

The best backend for AI-coded apps

NG

Nango

A single API for all your integrations

EV

Evidence

Business intelligence as code

LG

Lago

The AI Native Billing Platform

RA

Recall AI

The API to get recordings, transcripts, and metadata from meetings

AP

Activepieces

Open-source, AI-first and no-code business automation tool

TR

Trim

A foundation model for physics.

MF

Maritime Fusion

Fusion reactors for ships

BY

Bystreet

Connect with hoteliers around the world.

PH

Paratus Health

healthcare AI

RO

Roark

Test, monitor, and improve your voice agents

SP

Spott

AI-native ATS/CRM for recruiting firms

RS

Reditus Space

Reusable Satellites

MI

Misprint

Misprint is building Robinhood for Pokemon cards

ML

Miyagi Labs

AI tutors for exam prep

OU

Outlit

Protect and Grow Long-tail Revenue

NI

Nitrode

Frontier AI research to advance game development

PR

Promptless

An AI teammate that automatically updates your customer-facing docs

BU

Bud

Agent with a computer

OU

Outship

Hire amazing engineers by seeing how they use AI

AR

Artifact

An Collaborative, AI-native IDE for Hardware Engineers

BU

Browser Use

Agents that use the browser.

ER

Ergo

AI agents and unified data layer for revenue teams

CO

CopyCat

AI for Commercial Insurance Agencies

WO

Woz

Claude Code plugin that reduces token consumption and cost by 50%

LA

Lopus AI

Headless Data Team

10

10x

AI Sales Teams for Dental Practices

TA

Toothy AI

AI for insurance verification & billing at dental clinics

CO

Conntour

AI to monitor thousands of security cameras.

VH

Vocality Health

Voice AI for medical language translation

AL

Alice.tech

AI-driven exam prep

FA

Fazeshift

AI agent for Accounts Receivable

CE

Central

Payroll, benefits, state compliance & other bullsh*t for startups

OU

Outerport

EDA for Industrial Control Systems

MA

Mica AI

Replace the humans fixing bad data

CA

Capitol AI

Capitol: the sovereign operating system for intelligence.

RA

Rastro

The fastest way to launch product catalogs.

DA

Dataleap

AI Employees for the Enterprise

HA

Haystack

Replay real customer journeys against every change before you ship

WI

Winfunc

ai-native security engineering for mission critical codebases

FA

FINNY AI

The organic growth engine for financial advisors

LA

Lighthouz AI

Freight bill audits, AP, AR automation for freight brokers with…

PR

Proxis

The platform for enterprise AI agent automations, starting with email.

RE

RetroFix

Automate any workflow using plain english

MD

mdhub

AI-native operating system for behavioral health clinics.

CH

Cheers

Win local search on ChatGPT & other LLMs

SI

SimCare

AI avatars to scale healthcare training.

AA

Arva AI

AI for critical banking operations

AF

Affil.ai

AI Affiliate Network For Financial Companies

OW

Oway

The coordination OS for the physical economy.

OL

Orca Launcher

Orca lets you build, discover, and play Minecraft games with friends.

TF

The Forecasting Company

Foundation models for time series

ZA

Zeit AI

The autonomous data engineer for the mid-market

DI

Distro

The AI co-pilot for sales reps at industrial wholesale distributors.

BI

Biocartesian

Converting biology into digital molecular maps

AN

Anthrogen

We work on generalizable tools for the next era of biotech.

AR

Azalea Robotics

Automating airport baggage handling with robots.

EN

Entangl

Find & resolve issues in data center engineering & operations using AI

HE

HeartByte

GenAI Interactive story. Creator write fictions 10x faster.

HA

Hazel

AI-enabled procurement for government

EL

Ellipsis

Cloud platform for coding agents

IN

InQuery

Intelligent Medical Record Reviews

ZA

Zaymo

Interactive email builder for ecommerce brands

RF

Roboflow

🖼️ Give your software the sense of sight.

AL

AnythingLLM

Building the definitive all-in-one on-device AI productivity tool

BM

Beam

AI-Native Cloud Platform

TW

Twenty

Open Source CRM

RQ

Requestly

Open-Source Postman alternative

OL

Ollama

Get up and running with large language models.

TL

Traceloop

Know what your LLM is doing — and why it’s failing

HL

Humanloop

Humanloop is the LLM evals platform for enterprises.

VA

Vapi

Voice AI for developers.

RA

Retell AI

Supercharge Your Contact Center Operations with AI Phone Agents

IC

Infracost

Shift FinOps Left: Proactively Find & Fix Cloud Cost Issues

CO

Courier

The fastest way for developers to build notifications for their app.

BN

Bun

Bun is an incredibly fast all-in-one JavaScript toolkit

PC

Payload CMS

Developer-First Headless CMS and Application Framework

QB

QuestDB

High-performance time series database

SL

Slope

The B2B Payments Platform

TP

Teleport

The Infrastructure Identity Company

ES

Escape

Offensive security for the teams that are 100x outnumbered

DV

Dover

Your startup's all-in-one recruiting solution

LD

Lightdash

The open source Looker alternative

MX

Mux

Video infrastructure for developers

GR

Greptile

AI code review agent with complete context of your codebase

CD

Conductor

Run a team of coding agents on your Mac

MV

Moonvalley

Building the next generation AI creative studio

MT

Mastra

The Javascript framework for building AI agents, from the Gatsby devs

BK

Blacksmith

The fastest way to run your GitHub Actions

GG

Gigs

The OS for Embedded Telecom

EN

Enode

Energy Orchestration Platform

UP

Upflow

Cash collection technology for B2B businesses

PD

PeerDB

Fast, native ETL for Postgres 🐘 🚀

FR

Front

Customer communications hub for building strong relationships

NM

Numeral

The AI-native sales tax solution.

LC

LanceDB

Open-source, serverless vectordb for production-scale generative AI

ST

SuperTokens

Open source alternative to Auth0 / AWS Cognito / Firebase Auth

OR

OpenReplay

Open-source, self-hosted, session replay tool for developers.

HD

HyperDX

Open-source, dev-friendly observability.

MM

Mattermost

Secure Collaboration for Technical Teams

GB

GrowthBook

Open source feature flagging and A/B testing

LL

LiteLLM

Call every LLM API like it's OpenAI [100+ LLMs]

FW

Flowise

Open source GenAI development platform

FZ

Firezone

Easiest way to set up Zero Trust Access for your team

SC

Screenpipe

Turn your company's computer work into AI agents.

SA

SuperAgent

Security for AI-native developers

ST

Starcloud

Data centers in space

MI

MindFort

Autonomous Security Agents

FL

FlutterFlow

Application Development Platform (Native Mobile + Web Apps)

HY

Hyperbound

Revenue Activation Platform

LE

Legora

The AI workspace for lawyers

TA

Tasklet

Agents that own the work

GL

Glide

Glide turns spreadsheets into beautiful, intelligent apps.

SL

Slash

Banking, corporate cards, stablecoin payments – available globally.

SO

Solidroad

AI agents for CX teams, starting with training and QA.

AU

Auctor

The agentic operating system for modern system integrators.

AC

Atlas Card

Modern spend management & concierge.

AR

ARQ

The global financial platform for affluent consumers in the Americas.

SP

SpruceID

SpruceID lets users control their data across the web.

W(

Warp (HR)

AI-native Employee Management Platform for High-Growth Companies

SP

Spade

Spade is the data and AI platform for modern finance.

FI

Finch

Finch is the Employment Data Platform

FR

Fractional

The place where motivated investors and entrepreneurs co-own together.

WA

Warmly

[Acquired by HubSpot in 2026] Autonomous sales platform to auto-email…

NA

Navattic

Interactive product demos

PA

PartnerStack

PartnerStack is a full stack solution for partnerships.

AN

Anima

The next generation care enablement platform

RO

Rootly

AI-native on-call and incident response carefully crafted to help…

PA

Paragon

The embedded integration platform for SaaS apps.

RE

Reworkd

The simplest way to extract web data at scale

ZE

Zeal

Modern payroll for modern work

CO

Cortex

Cortex is the Internal Developer Portal eliminating “developer tax”…

GC

Gym Class

Connecting the world by simulating it

NO

Nomba

Banking and payments for businesses in Africa

NS

nsave

Trusted $€£ accounts abroad for people from unstable economies.

PU

Pulse

Production-grade unstructured document extraction

ME

Method

Financial connectivity API for consumer liabilities

EV

Every

Banking + Payroll/Benefits + Bookkeeping + Tax in one place

CI

Cinder

Infrastructure to protect companies from AI abuse

SL

Slite

The self-maintaining knowledge base

RA

Rally

Agentic User Research Infrastructure

SP

Spur

Spur is your AI QA Engineer. Test your websites with natural language.

RU

Rutter

The Unified API for Business Financial Data

DE

Deepnote

A better data science notebook.

AT

AtoB

Modernizing global transportation payments.

VO

Voiceops

We help B2C companies learn from every customer interaction

JU

Julius

Build and analyze things with AI

NO

Nowadays

AI-native platform for corporate meetings and events

PY

Pylon

The Agentic Support Platform purpose-built for B2B.

MI

Middesk

We make it easier for B2B companies to transact with one another

IN

Invert

Data analytics software for biomanufacturing.

FI

Female Invest

The world's largest financial education and community app for women

TD

Two Dots

AI fraud prevention and underwriting agent

CA

Camber

Admin automation for healthcare

IN

Interfere

Give engineering, product, and design teams insight into unseen issues

IN

Inkeep

Build AI Agent teammates and automations in code or no-code

FA

Farel

Next-gen airline OS

ST

StackAI

The Enterprise AI Transformation Platform

MA

MarqVision

IP operating software for brands and content companies

AL

Aleph

One source of truth for financial data.

AI

Atomic Industries

Software orchestrated mass production of plastics

ST

Stable

A virtual address + mailbox for business

TE

Tennr

Fast, Transparent Patient Experiences

PR

Promise

Better payment systems for governments and the communities they serve.

IN

Inversion

Turning space into a transportation layer for Earth

OS

Osmind

Platform for breakthrough mental health research and treatment

ST

Stoke

Seamless mobility to, through, and from space. It starts with 100%…

DA

David AI

Data for audio AI

DA

Datacurve

Frontier coding data for training and evaluating LLMs

AN

Anara

AI for researchers

VT

Vulcan Technologies

Secure frontier AI for government & adjacent knowledge work

CR

Credal

The Control Plane for Enterprise Agents

ZE

ZeroEntropy

Artificial Specialized Intelligence

RE

Reducto

The complete agentic document platform

OS

Osmosis

Reinforcement Learning (RL) for AI Agents

SP

Spline

Design and collaborate in multiple dimensions.

FU

FurtherAI

AI Workforce for the Insurance Industry

AL

Alex

Alex is the AI recruiter for hiring great people.

VE

Vesence

AI for High-Stakes Work

RE

Relace

Models and infra for coding agents

EK

Ekho

Shopify for vehicles

F(

Flint (K12)

Personalized learning built for schools

CO

Cocoon

Bring your most important groups closer together

QU

Quo

The all-in-one business phone for teams.

MP

Magic Patterns

Go from idea to production with AI.

LA

Langdock

The all-in-one AI platform for companies.

SH

Shinkei

Robots for longer-lasting, better-tasting fish at scale.

SA

SafetyKit

AI agents for risk, compliance, and safety

TO

Toma

AI for Underserved Industries

TA

Tailor

Headless ERP for retail operations

RO

Rove

Travel the world for free.

MO

Momentic

The agentic quality platform for web and mobile

LE

LemFi

Fair, simple and accessible financial services

RE

Response

Organizing the world's inventory.

JU

Junction

API for at-home health data

PE

PermitFlow

Construction's AI Platform

HA

HappyRobot

Intelligence that runs your operations.

VE

Verse

AI-enabled ordering for medical equipment & supplies

SI

Solve Intelligence

AI patent drafting, prosecution, litigation and more for legal teams.

PA

Parahelp

Build an AI support agent that securely uses all your tools

AU

autone

Inventory management SaaS for Retail & Consumer brands

SU

Suger

Salesforce for Cloud marketplaces on AWS, Azure, GCP

SH

Shaped

The real-time retrieval engine for search, feeds, and agents.

AL

Array Labs

We're building satellites to create a real-time 3D map of the world.

AU

Autonomous

Superintelligent financial advisor

OV

Overlap

Multimodal AI agents for video

IT

Item

The AI-Native CRM that works for you

22

222

the AI social facilitator for offline human to human interactions

AC

Activeloop

Database for AI

AV

Aqua Voice

Frontier Voice Input - write 4x faster than typing.

AR

Artisan

AI employees that take on real work, starting with sales

AS

Assembly

Create remarkable client experiences

BA

Basedash

The AI-native business intelligence platform

BI

Bird

The world’s largest omnichannel communications platform

SH

Shepherd

Modernizing commercial insurance

CA

Campfire

The AI Native ERP for the fastest growing companies.

CA

Cambio

AI-native commercial real estate operations

CP

Common Paper

The SAFE for commercial contracts

DL

Dedalus Labs

Compute substrate for AI agents

D(

Ditto (Words)

Manage the words across your team’s product from design to production.

DR

Draftwise

Contract and negotiation AI built for lawyers

DR

Driver

Context for Codebases

FO

Formance

Open Source Infrastructure for the Financial Internet

WI

Willow

The voice interface replacing your keyboard

BA

Bretton AI

AI-native operations for the banks

LI

Lio

The World's First Multi-Agent System for Procurement

PU

Pulley

Pulley helps founders and finance teams manage their equity and cap…

GU

Gumloop

The multiplayer AI agent builder. Let anyone build, IT controls access

KE

Kernel

Crazy fast, open source infra for AI agents to use the Internet

LH

Latent Health

Medical language models to automate healthcare operations

PA

Paradigm

A reimagined workspace with AI at its core