Y Combinator Portfolio

YC-Backed Companies

5,949 Y Combinator portfolio companies tracked in the Altss database. For each company, Altss surfaces which family offices have co-invested alongside YC.

Summer 2025

(31 companies)
Skope logo
S25

Skope

AI Agents for Law Firms.

Slashy logo
S25

Slashy

Cursor for Email

Socratix AI logo
S25

Socratix AI

AI coworkers for fraud and risk teams.

Solva logo
S25

Solva

Automates insurance claims and stops incorrect payouts

Spotlight Realty logo
S25

Spotlight Realty

AI powered brokerage reducing residential rental commissions in NYC…

Stellon Labs logo
S25

Stellon Labs

Building tiny frontier AI models that run on edge devices

Stockline logo
S25

Stockline

AI-native ERP for food wholesalers

Stormy AI logo
S25

Stormy AI

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

Synthetic Society logo
S25

Synthetic Society

Synthetic Users to Simulate Real Users

TectoAI logo
S25

TectoAI

A Platform for AI Governance

Tesora logo
S25

Tesora

Frontier AI for Actuaries

The Prompting Company logo
S25

The Prompting Company

We help products get mentioned in ChatGPT.

Theora logo
S25

Theora

OpenEvidence for Pharmaceutical Evidence

Topological logo
S25

Topological

Physics-based foundation models for CAD optimization.

Trace logo
S25

Trace

Context-aware orchestration between humans and AI.

TraceRoot.AI logo
S25

TraceRoot.AI

Open source self-healing layer for AI agents

Uplift AI logo
S25

Uplift AI

Foundational Voice Models for regional languages

Veritus logo
S25

Veritus

AI agents for the consumer lending industry

Verne Robotics logo
S25

Verne Robotics

AI models that teach robots new skills in hours

VibeFlow logo
S25

VibeFlow

Lovable, n8n and a database all in one platform

Vulcan Technologies logo
S25

Vulcan Technologies

AI for every law, regulation, and court case

technology · United States

Wafer logo
S25

Wafer

AI that makes AI fast

Wayline logo
S25

Wayline

AI voice for property managers

Wedge logo
S25

Wedge

Palantir for Healthcare AI Agents

b12 Labs logo
S25

b12 Labs

Chemical Copilot for Pharma and Biotech

bitrig logo
S25

bitrig

Vibe code, test, and deploy Swift apps. All from your iPhone.

burnt logo
S25

burnt

Agentic Operating System for Food Supply Chain

cocreate logo
S25

cocreate

video production software

gitdot logo
S25

gitdot

A better GItHub

stagewise logo
S25

stagewise

The Open Source Agentic IDE

truthsystems logo
S25

truthsystems

Automatically blocking risky behavior with real-time governance agents

Summer 2024

(169 companies)
&AI logo
S24

&AI

Collaborative workspace for patent litigators

1849 bio logo
S24

1849 bio

Engineering microbes for miners to unlock billions in trapped metal

ACX logo
S24

ACX

Next-generation biocides for sustainable agriculture at scale

Abel Police logo
S24

Abel Police

Automating police paperwork

Affil.ai logo
S24

Affil.ai

AI Affiliate Network For Financial Companies

Aluna logo
S24

Aluna

Data for biomedical AI

AminoAnalytica logo
S24

AminoAnalytica

The AI-Native Operating System for Protein Engineering

Anara logo
S24

Anara

AI for researchers

Anglera logo
S24

Anglera

AI-Powered Product Data Enrichment

Anthrogen logo
S24

Anthrogen

We're training the next generation of protein foundation models.

Apten logo
S24

Apten

Omnichannel AI agents that engage leads across SMS, voice, and email

Ares Industries logo
S24

Ares Industries

Building low-cost cruise missiles

Argil logo
S24

Argil

The video generation engine for the creator economy

Arva AI logo
S24

Arva AI

AI Agents to scale AML, KYB and KYC operations

Assembly HOA logo
S24

Assembly HOA

AI-native HOA Management Company

AutoPallet Robotics logo
S24

AutoPallet Robotics

We make robots that move boxes in warehouses

Autumn Labs logo
S24

Autumn Labs

Datadog for industrial robots

Azalea Robotics Corporation logo
S24

Azalea Robotics Corporation

Automating airport baggage handling with robots.

Baseline AI logo
S24

Baseline AI

AI document creation and data management for clinical trials

healthcare · United States

Bayesline logo
S24

Bayesline

Highly customizable and blazingly fast analytics for asset managers.

financial services

BeeBettor logo
S24

BeeBettor

Robinhood for sports prediction markets

Benchify logo
S24

Benchify

Executable healthcare contracts

Biocartesian logo
S24

Biocartesian

Converting biology into digital molecular maps

Bits to Atoms logo
S24

Bits to Atoms

Match job seekers to roles at deep technology startups.

Blaze logo
S24

Blaze

Global Venmo for cross border payments

Brighterway logo
S24

Brighterway

Streamlining the medical record review process in workers comp

BrowserOS logo
S24

BrowserOS

The Open Source Agentic Browser

Bucket Robotics logo
S24

Bucket Robotics

Defect detection for manufacturing built from CAD and synthetic data.

Callback logo
S24

Callback

Effortless AI automation for business operations

Capitol AI logo
S24

Capitol AI

Capitol: the sovereign operating system for intelligence.

technology · United States

Cartage logo
S24

Cartage

Autonomous freight coordination

industrials · United States

Central logo
S24

Central

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

fintech · United States

Cerulion logo
S24

Cerulion

Open source operating system for robots

Cheers logo
S24

Cheers

Win local search on ChatGPT & other LLMs

ClaimSorted logo
S24

ClaimSorted

Making it easy for insurance companies to process claims

business productivity software · United States

Clearly AI logo
S24

Clearly AI

Automate security and privacy reviews

Cloudglue logo
S24

Cloudglue

The video context layer for AI.

CodeViz logo
S24

CodeViz

One living model of your software architecture

Codes Health logo
S24

Codes Health

Medical Record Retrieval with Zero Human Error

Comfy Deploy logo
S24

Comfy Deploy

ComfyUI for everyone on your team

Conductor logo
S24

Conductor

Run a team of coding agents on your Mac

Conductor Quantum logo
S24

Conductor Quantum

AI software for operating quantum computers

Conveo logo
S24

Conveo

Confident decisions in days with AI-led interviews.

Corgi Insurance logo
S24

Corgi Insurance

Corgi is building an AI financial infrastructure company

fintech · United States

Coval logo
S24

Coval

Simulation & Evaluation that scales voice and chat AI agents

CreativeMode logo
S24

CreativeMode

Lovable for Minecraft mods

Dataleap logo
S24

Dataleap

AI Employees for the Enterprise

David AI logo
S24

David AI

Data for audio AI

Dayflow logo
S24

Dayflow

Generate a detailed log of everything you've worked on, automatically.

Decisional AI logo
S24

Decisional AI

AI Coworkers for Business Automation

DeepSim, Inc. logo
S24

DeepSim, Inc.

An AI physics simulator for AI chip design

Dench.com logo
S24

Dench.com

Open Source AI CRM built on top of OpenClaw

DigitalCarbon logo
S24

DigitalCarbon

Transform Images And Videos Into Immersive 3D With AI

Dimely logo
S24

Dimely

AI-Powered Spreadsheet for Billing Automation

Diode Computers, Inc. logo
S24

Diode Computers, Inc.

Automate circuit board design using AI

Distro logo
S24

Distro

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

technology · United States

Dodo logo
S24

Dodo

AI agents that handle communications for clinics

Domu Technology Inc. logo
S24

Domu Technology Inc.

AI Agents for collections

Doublezero logo
S24

Doublezero

Platform to build, use, and monetize fully autonomous agents

DreamRP logo
S24

DreamRP

Tech and platforms for human creators and the entertainment industry

Drillbit logo
S24

Drillbit

Automating Office Work for Residential Contractors.

Educato logo
S24

Educato

Worldwide exam-prep platform

Elayne logo
S24

Elayne

Estate settlement, from verified discovery to distribution

technology · United States

Elevate logo
S24

Elevate

Automated AI data integrations for roll-ups

Ember Robotics logo
S24

Ember Robotics

Datadog for robots

Emergent logo
S24

Emergent

AI app builder that turns your ideas into monetizable software.

blockchain technology · United States

Entangl logo
S24

Entangl

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

Entropy logo
S24

Entropy

Autonomous intake and RCM for specialty clinics.

Evolvere BioSciences logo
S24

Evolvere BioSciences

Making Next-Generation Antibiotics that Outpace Bacterial Evolution

FINNY AI logo
S24

FINNY AI

The organic growth engine for financial advisors

Fazeshift logo
S24

Fazeshift

AI agent for Accounts Receivable

fintech · United States

Ficra logo
S24

Ficra

Real time, source of truth for every product screen and user flow

Finosu logo
S24

Finosu

AI Native Consumer Loan Servicer

FirstWork logo
S24

FirstWork

Rippling for seasonal workers

enterprise applications · United States

Flyflow logo
S24

Flyflow

The easiest way to find high-quality sales leads

Formula Insight logo
S24

Formula Insight

Help Institutional Investors manage, track & query their Excel models

Freestyle logo
S24

Freestyle

We run and deploy code your AI wrote

Fuse logo
S24

Fuse

AI helpers for patient intake and benefits checks

Gauge logo
S24

Gauge

Your marketing agent for organic, paid, and AI search.

Glasskube logo
S24

Glasskube

Software Distribution Platform for On-Prem, Kubernetes, Docker & BYOC

Guardian RF logo
S24

Guardian RF

Drone detection for US defense and national security

Hamming AI logo
S24

Hamming AI

Complete QA platform for voice agents

technology · United States

Handled logo
S24

Handled

Automating post-order operations for e-commerce brands and 3PLs

Haystack logo
S24

Haystack

The agent-native control layer for code changes

Helium logo
S24

Helium

Self Improving Software

Henry logo
S24

Henry

Automating Deal Decks for Commercial Real Estate Brokers

education · Argentina

HeroUI logo
S24

HeroUI

The UI framework for AI agents and developers to build beautiful apps.

Hestus, Inc. logo
S24

Hestus, Inc.

An AI-powered CAD software

Hey Revia logo
S24

Hey Revia

Voice AI to automate complex phone calls for healthcare providers

Hyrex logo
S24

Hyrex

The COLD Task Framework

Intryc logo
S24

Intryc

Intryc uses AI to automate quality assurance for customer support

Invaria logo
S24

Invaria

The next generation logging and observability platform

Ionworks logo
S24

Ionworks

Simulation software used by leading battery and automotive companies

Kastle logo
S24

Kastle

AI agents for mortgage servicing

Keet logo
S24

Keet

Authentication for AI Agents

Kenley logo
S24

Kenley

AI Agents for Advisory & Financial Services.

Kontigo logo
S24

Kontigo

USDC-Smart Neobank for Latinos.

Kopra Bio logo
S24

Kopra Bio

Genetically engineered viruses that teach your immune system to kill…

Kura AI logo
S24

Kura AI

New State of the Art for Browser Agents

Laminar logo
S24

Laminar

Understand why your AI agent breaks. Iterate fast to fix it.

LedgerUp logo
S24

LedgerUp

AI agents that handles complex billing and revenue

Lighthouz AI logo
S24

Lighthouz AI

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

Ligo Biosciences logo
S24

Ligo Biosciences

Enzyme design models.

Lilac Labs logo
S24

Lilac Labs

We automate the person taking orders at drive-thrus with a voice AI

Lore logo
S24

Lore

Transform your iMessage conversations into shareable stories

Lucible logo
S24

Lucible

Combined checking and investment account

Mage Legal logo
S24

Mage Legal

Automatic AI Legal Diligence

MagiCode logo
S24

MagiCode

A Reliable AI Frontend Engineer

Maitai logo
S24

Maitai

Reliable, self-improving enterprise AI

Manaflow logo
S24

Manaflow

Building the open-source terminal for coding agents

Mem0 logo
S24

Mem0

The Memory layer for AI Agents

business/productivity software · United States

Merlin AI logo
S24

Merlin AI

AI powered ERP for Construction

technology · United States

Mica AI logo
S24

Mica AI

Replace the humans fixing bad data

Midship logo
S24

Midship

AI for SOX testing

Mineflow logo
S24

Mineflow

Mineflow predicts the shape and location of mineral deposits

MinusX logo
S24

MinusX

Open source agentic BI for founders

Miru logo
S24

Miru

Config Management for Robotics

Mito Health logo
S24

Mito Health

Bloodwork and personalized insights to help you live longer

healthcare · Singapore

Modus logo
S24

Modus

Unlock revenue per employee with AI-powered headcount management

Moreta logo
S24

Moreta

Payments made easy for international travelers.

NetworkOcean logo
S24

NetworkOcean

We build and operate underwater data centers.

Odo logo
S24

Odo

Your email assistant because you deserve a better morning

Offstream logo
S24

Offstream

Vanta for carbon compliance

Ontra Mobility logo
S24

Ontra Mobility

Platform for cities to optimize transit

Opslane logo
S24

Opslane

Deploy to Kubernetes in minutes

Orca Launcher logo
S24

Orca Launcher

A launcher that turns Minecraft into a game platform like Roblox

OrgOrg logo
S24

OrgOrg

Organizational productivity suite for companies

Outerport logo
S24

Outerport

AI engineering scientists - search PLMs, read drawings, run simulation

Overeasy logo
S24

Overeasy

Overlap logo
S24

Overlap

Multimodal AI agents for video

Oway logo
S24

Oway

AI Infrastructure for America’s Empty Truck Space

Paasa logo
S24

Paasa

Invest in Global Equities from India

Palmier logo
S24

Palmier

Cinematic AI Marketing Videos

Panora logo
S24

Panora

Turning messy inboxes into ERP-Ready Data

Parahelp logo
S24

Parahelp

The AI agent that resolves complex support tickets, effortlessly

Parley logo
S24

Parley

Automating flat-fee legal work, starting with work visas + green cards

Patched logo
S24

Patched

Reliable AI for Regulated Ops

PathPilot logo
S24

PathPilot

AI Agents for Lending Operations

Pax logo
S24

Pax

AI Broker for Tariff Refunds

Pharos logo
S24

Pharos

Helping hospitals identify and prevent avoidable harm using AI

Phonely logo
S24

Phonely

AI call centers

Pinnacle logo
S24

Pinnacle

API & SDK for RCS (the next-generation of texting)

Pipeshift logo
S24

Pipeshift

Inference for real-time agents

technology · United States

Planbase logo
S24

Planbase

AI workforce management for healthcare

Plume logo
S24

Plume

Renewable infrastructure deployment at scale.

Poka Labs logo
S24

Poka Labs

Helping industrial manufacturers win deals fast, at the right price.

Polymet logo
S24

Polymet

AI Product Designer

Praxos logo
S24

Praxos

Your personal AI companion

Pre logo
S24

Pre

The AI accountability agent for startup founders

Presti AI logo
S24

Presti AI

Helping furniture companies create product visuals with AI

ProhostAI logo
S24

ProhostAI

AI Property Manager for Airbnb & Short-Term Rental Hosts

Promi logo
S24

Promi

Optimizing ecommerce pricing with dynamic, personalized discounts

Propaya logo
S24

Propaya

AI commercial lease abstractions and review

Proxis logo
S24

Proxis

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

Pulse logo
S24

Pulse

Production-grade unstructured document extraction

Quetzal logo
S24

Quetzal

Simple, LLM-first translation and internationalization for software

Random Labs logo
S24

Random Labs

Random labs is building long running autonomous coding agents.

Rastro logo
S24

Rastro

The fastest way to launch product catalogs.

ReactWise logo
S24

ReactWise

AI Co-Pilot for Chemical Process Optimization

Redouble AI logo
S24

Redouble AI

Java-native multi-agentic AI operating system for enterprise

Refactor logo
S24

Refactor

Deploying secure and reliable AI agents across healthcare, retail,…

Remade logo
S24

Remade

AI-native canvas for creative workflows.

RentFlow logo
S24

RentFlow

The AI infrastructure for cash-flow-aligned business rent

Rescript logo
S24

Rescript

AI Regulatory Analyst for Enterprises

RetroFix logo
S24

RetroFix

Automate any workflow using plain english

Rewbi logo
S24

Rewbi

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

RiskAngle logo
S24

RiskAngle

AI medical summaries in minutes

Roger logo
S24

Roger

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

Rowboat Labs logo
S24

Rowboat Labs

Open-source AI coworker with memory

Page 16 of 30

Which family offices back YC companies?

Altss tracks family office deal activity across the YC portfolio. Request access to see investor-level data, round participation, and LP mandates.

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