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
AI Agents for Law Firms.

Slashy
Cursor for Email

Socratix AI
AI coworkers for fraud and risk teams.

Solva
Automates insurance claims and stops incorrect payouts

Spotlight Realty
AI powered brokerage reducing residential rental commissions in NYC…

Stellon Labs
Building tiny frontier AI models that run on edge devices

Stockline
AI-native ERP for food wholesalers

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

Synthetic Society
Synthetic Users to Simulate Real Users

TectoAI
A Platform for AI Governance

Tesora
Frontier AI for Actuaries

The Prompting Company
We help products get mentioned in ChatGPT.

Theora
OpenEvidence for Pharmaceutical Evidence

Topological
Physics-based foundation models for CAD optimization.

Trace
Context-aware orchestration between humans and AI.

TraceRoot.AI
Open source self-healing layer for AI agents

Uplift AI
Foundational Voice Models for regional languages

Veritus
AI agents for the consumer lending industry

Verne Robotics
AI models that teach robots new skills in hours

VibeFlow
Lovable, n8n and a database all in one platform

Vulcan Technologies
AI for every law, regulation, and court case
technology · United States

Wafer
AI that makes AI fast

Wayline
AI voice for property managers

Wedge
Palantir for Healthcare AI Agents

b12 Labs
Chemical Copilot for Pharma and Biotech

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

burnt
Agentic Operating System for Food Supply Chain

cocreate
video production software

gitdot
A better GItHub

stagewise
The Open Source Agentic IDE

truthsystems
Automatically blocking risky behavior with real-time governance agents
Summer 2024
(169 companies)
&AI
Collaborative workspace for patent litigators

1849 bio
Engineering microbes for miners to unlock billions in trapped metal

ACX
Next-generation biocides for sustainable agriculture at scale

Abel Police
Automating police paperwork

Affil.ai
AI Affiliate Network For Financial Companies

Aluna
Data for biomedical AI

AminoAnalytica
The AI-Native Operating System for Protein Engineering

Anara
AI for researchers

Anglera
AI-Powered Product Data Enrichment

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

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

Ares Industries
Building low-cost cruise missiles

Argil
The video generation engine for the creator economy

Arva AI
AI Agents to scale AML, KYB and KYC operations

Assembly HOA
AI-native HOA Management Company

AutoPallet Robotics
We make robots that move boxes in warehouses

Autumn Labs
Datadog for industrial robots

Azalea Robotics Corporation
Automating airport baggage handling with robots.

Baseline AI
AI document creation and data management for clinical trials
healthcare · United States

Bayesline
Highly customizable and blazingly fast analytics for asset managers.
financial services

BeeBettor
Robinhood for sports prediction markets

Benchify
Executable healthcare contracts

Biocartesian
Converting biology into digital molecular maps

Bits to Atoms
Match job seekers to roles at deep technology startups.

Blaze
Global Venmo for cross border payments

Brighterway
Streamlining the medical record review process in workers comp

BrowserOS
The Open Source Agentic Browser

Bucket Robotics
Defect detection for manufacturing built from CAD and synthetic data.

Callback
Effortless AI automation for business operations

Capitol AI
Capitol: the sovereign operating system for intelligence.
technology · United States

Cartage
Autonomous freight coordination
industrials · United States

Central
Payroll, benefits, state compliance & other bullsh*t for startups
fintech · United States

Cerulion
Open source operating system for robots

Cheers
Win local search on ChatGPT & other LLMs

ClaimSorted
Making it easy for insurance companies to process claims
business productivity software · United States

Clearly AI
Automate security and privacy reviews

Cloudglue
The video context layer for AI.

CodeViz
One living model of your software architecture

Codes Health
Medical Record Retrieval with Zero Human Error

Comfy Deploy
ComfyUI for everyone on your team

Conductor
Run a team of coding agents on your Mac

Conductor Quantum
AI software for operating quantum computers

Conveo
Confident decisions in days with AI-led interviews.

Corgi Insurance
Corgi is building an AI financial infrastructure company
fintech · United States

Coval
Simulation & Evaluation that scales voice and chat AI agents

CreativeMode
Lovable for Minecraft mods

Dataleap
AI Employees for the Enterprise

David AI
Data for audio AI

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

Decisional AI
AI Coworkers for Business Automation

DeepSim, Inc.
An AI physics simulator for AI chip design

Dench.com
Open Source AI CRM built on top of OpenClaw

DigitalCarbon
Transform Images And Videos Into Immersive 3D With AI

Dimely
AI-Powered Spreadsheet for Billing Automation

Diode Computers, Inc.
Automate circuit board design using AI

Distro
The AI co-pilot for sales reps at industrial wholesale distributors.
technology · United States

Dodo
AI agents that handle communications for clinics

Domu Technology Inc.
AI Agents for collections

Doublezero
Platform to build, use, and monetize fully autonomous agents

DreamRP
Tech and platforms for human creators and the entertainment industry

Drillbit
Automating Office Work for Residential Contractors.

Educato
Worldwide exam-prep platform

Elayne
Estate settlement, from verified discovery to distribution
technology · United States

Elevate
Automated AI data integrations for roll-ups

Ember Robotics
Datadog for robots

Emergent
AI app builder that turns your ideas into monetizable software.
blockchain technology · United States

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

Entropy
Autonomous intake and RCM for specialty clinics.

Evolvere BioSciences
Making Next-Generation Antibiotics that Outpace Bacterial Evolution

FINNY AI
The organic growth engine for financial advisors

Fazeshift
AI agent for Accounts Receivable
fintech · United States

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

Finosu
AI Native Consumer Loan Servicer

FirstWork
Rippling for seasonal workers
enterprise applications · United States

Flyflow
The easiest way to find high-quality sales leads

Formula Insight
Help Institutional Investors manage, track & query their Excel models

Freestyle
We run and deploy code your AI wrote

Fuse
AI helpers for patient intake and benefits checks

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

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

Guardian RF
Drone detection for US defense and national security

Hamming AI
Complete QA platform for voice agents
technology · United States

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

Haystack
The agent-native control layer for code changes

Helium
Self Improving Software

Henry
Automating Deal Decks for Commercial Real Estate Brokers
education · Argentina

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

Hestus, Inc.
An AI-powered CAD software

Hey Revia
Voice AI to automate complex phone calls for healthcare providers

Hyrex
The COLD Task Framework

Intryc
Intryc uses AI to automate quality assurance for customer support

Invaria
The next generation logging and observability platform

Ionworks
Simulation software used by leading battery and automotive companies

Kastle
AI agents for mortgage servicing

Keet
Authentication for AI Agents

Kenley
AI Agents for Advisory & Financial Services.

Kontigo
USDC-Smart Neobank for Latinos.

Kopra Bio
Genetically engineered viruses that teach your immune system to kill…

Kura AI
New State of the Art for Browser Agents

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

LedgerUp
AI agents that handles complex billing and revenue

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

Ligo Biosciences
Enzyme design models.

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

Lore
Transform your iMessage conversations into shareable stories

Lucible
Combined checking and investment account

Mage Legal
Automatic AI Legal Diligence

MagiCode
A Reliable AI Frontend Engineer

Maitai
Reliable, self-improving enterprise AI

Manaflow
Building the open-source terminal for coding agents

Mem0
The Memory layer for AI Agents
business/productivity software · United States

Merlin AI
AI powered ERP for Construction
technology · United States

Mica AI
Replace the humans fixing bad data

Midship
AI for SOX testing

Mineflow
Mineflow predicts the shape and location of mineral deposits

MinusX
Open source agentic BI for founders

Miru
Config Management for Robotics

Mito Health
Bloodwork and personalized insights to help you live longer
healthcare · Singapore

Modus
Unlock revenue per employee with AI-powered headcount management

Moreta
Payments made easy for international travelers.

NetworkOcean
We build and operate underwater data centers.

Odo
Your email assistant because you deserve a better morning

Offstream
Vanta for carbon compliance

Ontra Mobility
Platform for cities to optimize transit

Opslane
Deploy to Kubernetes in minutes

Orca Launcher
A launcher that turns Minecraft into a game platform like Roblox

OrgOrg
Organizational productivity suite for companies

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

Overeasy

Overlap
Multimodal AI agents for video

Oway
AI Infrastructure for America’s Empty Truck Space

Paasa
Invest in Global Equities from India

Palmier
Cinematic AI Marketing Videos

Panora
Turning messy inboxes into ERP-Ready Data

Parahelp
The AI agent that resolves complex support tickets, effortlessly

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

Patched
Reliable AI for Regulated Ops

PathPilot
AI Agents for Lending Operations

Pax
AI Broker for Tariff Refunds

Pharos
Helping hospitals identify and prevent avoidable harm using AI

Phonely
AI call centers

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

Pipeshift
Inference for real-time agents
technology · United States

Planbase
AI workforce management for healthcare

Plume
Renewable infrastructure deployment at scale.

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

Polymet
AI Product Designer

Praxos
Your personal AI companion

Pre
The AI accountability agent for startup founders

Presti AI
Helping furniture companies create product visuals with AI

ProhostAI
AI Property Manager for Airbnb & Short-Term Rental Hosts

Promi
Optimizing ecommerce pricing with dynamic, personalized discounts

Propaya
AI commercial lease abstractions and review

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

Pulse
Production-grade unstructured document extraction

Quetzal
Simple, LLM-first translation and internationalization for software

Random Labs
Random labs is building long running autonomous coding agents.

Rastro
The fastest way to launch product catalogs.

ReactWise
AI Co-Pilot for Chemical Process Optimization

Redouble AI
Java-native multi-agentic AI operating system for enterprise

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

Remade
AI-native canvas for creative workflows.

RentFlow
The AI infrastructure for cash-flow-aligned business rent

Rescript
AI Regulatory Analyst for Enterprises

RetroFix
Automate any workflow using plain english

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

RiskAngle
AI medical summaries in minutes

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

Rowboat Labs
Open-source AI coworker with memory
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.