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.

OmnistrateWinter 2023

Transform any software to multi-cloud SaaS in minutes not years

Ontra MobilitySummer 2024

Platform for cities to optimize transit

OnyxWinter 2024

Open Source AI Assistant and Enterprise Search

OpenmartWinter 2024

Local business data intelligence platform

OpenPipeSummer 2023

Turn expensive prompts into cheap fine-tuned models

OpenToolsSummer 2023

The API for LLM tool use

Osium AISummer 2023

Speed up materials innovation with Artificial Intelligence

OwaySummer 2024

The First AI Infrastructure Layer for America’s Empty Truck Space

PalommaWinter 2023

AI Agents for Residential Property Managers & Real Estate Developers

PandasAIWinter 2024

PandasAI is an open-source conversational data analysis platform with…

ParadeDBSummer 2023

The transactional Elasticsearch alternative built on Postgres

ParaQuerySpring 2025

Managed GPU-accelerated Spark + SQL at 2x speed and half the cost

ParcelBioWinter 2024

Next-generation mRNA medicines

PareaSummer 2023

Test, evaluate & observe your LLM applications

Persana AIWinter 2023

Alternative to Clay | Intelligent sales agent with 75+ data sources

PhonelySummer 2024

AI call centers

phosphoWinter 2024

Give brains to robots

PierreWinter 2023

Pierre is a new, opinionated, git platform.

PincitesSummer 2023

Close deals faster with AI for contract negotiation

Pivot RoboticsWinter 2024

AI for Robot Arms in Factories

PlanbaseSummer 2024

AI workforce management for healthcare

PointhoundSummer 2023

Earn and redeem credit card points for free flights

PointOneWinter 2024

Automated time tracking and billing for law firms.

Poka LabsSummer 2024

The modern operating system for chemical manufacturing.

PowderWinter 2024

AI Agents for precise document analysis

PraxosSummer 2024

Your personal AI companion

PrecipWinter 2024

High precision AI weather models

PreloopWinter 2024

Translate your experimental scripts into production ML services

PromptWinter 2023

Advertise on Prompts.

PromptArmorWinter 2024

LLM Security and Compliance

PropRiseSummer 2023

AI Investment Analyst for Commercial Real Estate

ProSightsWinter 2024

ProSights is an AI-native workflow automation / search platform for…

ProsperSummer 2023

AI Phone Agents for Healthcare Operations

PurplePagesWinter 2024

Purple is an AI agent for online local marketplace transactions.

PythagoraWinter 2024

Worlds first all-in-one AI development platform.

Quill BillsSummer 2023

AI-Powered Medical Billing

RagasWinter 2024

Building the open source standard for evaluating LLM Applications

RaindropWinter 2024

Sentry for AI Agents

RankaiSummer 2023

Jumpstarting SEO/GEO with AI + Human Experts

Read BeanSummer 2023

Learn language with real-world content, at your level

RecipeUISummer 2023

The open source Postman alternative.

Red Barn RoboticsWinter 2025

A Roomba for weeds on a farm.

ReductoWinter 2024

The most accurate API to parse documents

ReflexWinter 2023

Web apps in pure Python. Deploy with a single command.

ReformWinter 2024

Workflow automation. Built for logistics.

RepaintSummer 2023

AI for building websites

RescriptSummer 2024

AI Regulatory Analyst for Enterprises

ResendWinter 2023

Email for developers

ResonanceWinter 2024

Self-improving content bank for marketing

RetapeWinter 2023

AI workers for debt settlement

Retell AIWinter 2024

Supercharge Your Contact Center Operations with AI Phone Agents

RevampSummer 2023

AI-Powered Customer Segmentation for eCommerce

ReviFall 2024

AI-enabled M&A deal origination

RevideoSummer 2023

Create Videos with Code

RevisionDojoFall 2024

AI tutors for students.

ReworkdSummer 2023

The simplest way to extract web data at scale

rex.fitWinter 2023

Automating nutrition tracking.

RisottoWinter 2024

Risotto auto-solves IT support requests using AI

RoameSummer 2023

Flight search engine using credit card points and miles

RocketableWinter 2025

The AI Maximalist Software Holding Company