The YC company directory.

3,760 active Y Combinator companies. Browse by batch, click into any company to read the one-liner, founders, and quick facts. Seoable was built for founders who run companies like these.

RemadeSummer 2024

AI-native canvas for creative workflows.

RemoSummer 2024

AI for compliance teams at banks

renderletWinter 2024

Build interactive applications that run anywhere

RentFlowSummer 2024

The first 'Buy Now Pay Later' solution for Rents

RepromptWinter 2024

AI Agents for Location

RetailReadyWinter 2024

An AI-powered supply chain compliance engine

ReticularFall 2024

Interpretable AI for drug discovery

RetrofitWinter 2025

A vintage marketplace curated by AI

RetroFixSummer 2024

Automate any workflow using plain english

Revise RoboticsWinter 2025

Automating refurbishment of $1T in consumer electronics

RevylFall 2024

Proactive observability

RewbiSummer 2024

Rewbi uses AI to increase grid-connected battery storage revenue 2x

RigManicSummer 2024

Humanoid robots that do your chores

RimbaSpring 2025

AI to replace manual work in environmental compliance reporting

RiskCubeFall 2024

AI insurance agency.

Riveter AIFall 2024

Thousands of AI search agents running in parallel

RivieraWinter 2025

AI Employees for Hotels

RogerSummer 2024

Roger is an AI SDR that automates outbound sales and follows up 24/7.

Roundabout TechnologiesFall 2024

Software for AI-powered traffic lights

RowBoat LabsSummer 2024

Open-source AI-assisted agent builder

RunLocal AISummer 2024

The On-Device AI Development Platform

RyseWinter 2024

The secondary market for real estate leases

RyvnFall 2024

Easy and secure customer cloud deployments

SagalandWinter 2024

Open-Ended AI Game Platform

SaldorSummer 2024

Hands-free email

SalesPatriotWinter 2025

We help defense firms win more contracts with the Pentagon

SAMMY LabsWinter 2025

Live, AI-powered graph of every possible click path in your software

Sandra AIFall 2024

Building AI employees for car dealers, starting with AI receptionists

Saphira AISummer 2024

Vanta for Hardware

ScapeSummer 2024

AI-native CRM that captures all your conversations

ScoutWinter 2025

AI-powered student information system for K-12 schools

Seals AISummer 2024

AI Employees for Wholesalers & Distributors

SenseiSummer 2024

Robotic Training Data at Scale

Sepal AISummer 2024

Data Development for Advanced AI

SilurianSummer 2024

Foundation models to simulate Earth, starting with weather.

SimCare AISummer 2024

Conversations with AI patients to scale healthcare training.

Simple AISummer 2024

AI phone agents for enterprise

SimplexSummer 2024

Production-grade web agents.

SnowpilotSummer 2024

The connected spreadsheet that destroys data silos

SoffSummer 2024

Supply Chain OS for manufacturing companies.

Solum HealthSummer 2022

AI Automation for Therapy Practices

SorcererSummer 2024

Building a nervous system for the atmosphere

SpeckWinter 2024

Ambient Agent for Your Computer

SphinxFall 2024

AI Compliance Analysts for Banks & Fintechs

Splash Inc.Winter 2025

Autonomous patrol-boats for National Security

SplendorWinter 2022

We make dealing with insurance less annoying.

SpongecakeSummer 2024

Helping developers build computer use agents

SpottWinter 2025

AI-native ATS/CRM for recruiting firms

SpurSummer 2024

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

SRE.aiFall 2024

AI DevOps Agents

Stack AuthSummer 2024

The open-source Auth0 alternative

stagewiseSummer 2025

The frontend coding agent for real codebases.

StampWinter 2025

The AI Native Email Client

StarcloudSummer 2024

Data centers in space

StardriftSummer 2024

Your AI Travel Agent

SteinmetzWinter 2025

Hardware for Electric Vehicles.

StempadSummer 2024

Notion for science

Sterling Labs, IncSummer 2024

Currently in stealth - previously FocusBuddy

StewdioFall 2024

All-in-one AI creative platform

Stormy AISummer 2025

Al platform that makes social marketing as easy as running a Google…