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 2024

(79 companies)
RunLocal AI logo
S24

RunLocal AI

The first AI agent for optimizing ML model inference on edge hardware

Sage Care logo
S24

Sage Care

Automating home care agency operations with AI

Saldor logo
S24

Saldor

Software Factories

Saphira AI logo
S24

Saphira AI

The Enablement Layer for Physical AI

Saturn logo
S24

Saturn

Compliance and back office workflows for Wealth Managers.

Scape logo
S24

Scape

AI-native CRM that captures all your conversations

SchemeFlow logo
S24

SchemeFlow

AI Report Generation for Engineering & Environmental Review

Seals AI logo
S24

Seals AI

AI Employees for Wholesalers & Distributors

Sensei logo
S24

Sensei

Robotic Training Data at Scale

Sepal AI logo
S24

Sepal AI

Data Development for Advanced AI

Sharpe logo
S24

Sharpe

Agents for quantitative research and financial data science.

Silurian logo
S24

Silurian

Foundation models to simulate Earth, starting with weather.

SimCare logo
S24

SimCare

AI avatars to scale healthcare training.

Simple AI logo
S24

Simple AI

AI voice that sells

technology · United States

Simplex logo
S24

Simplex

AI agents to enroll providers with payors

Soff logo
S24

Soff

AI Agents for Distributors

Sonatoria logo
S24

Sonatoria

Helping Startups Grow Organically

Sorcerer logo
S24

Sorcerer

Building a nervous system for the atmosphere

Spaceium Inc logo
S24

Spaceium Inc

In-Space Refueling

industrials · United States

Spherecast logo
S24

Spherecast

AI Supply Chain Manager for CPG

Spur logo
S24

Spur

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

Stack Auth logo
S24

Stack Auth

The open-source Auth0 alternative

Starcloud logo
S24

Starcloud

Data centers in space

Stardrift logo
S24

Stardrift

AI travel planner

Stempad logo
S24

Stempad

Notion for science

Sterling Labs, Inc logo
S24

Sterling Labs, Inc

AI For Court Reporting

Storia AI logo
S24

Storia AI

Open source AI copilot that knows your company's code and its context

Substrate logo
S24

Substrate

Artificial Intelligence for your medical billing team

Superunit logo
S24

Superunit

Faster, more profitable background checks with AI

SureBright logo
S24

SureBright

Apple Care-like warranty program for every retailer

Synnax logo
S24

Synnax

Unified Hardware Control and Data Processing Software

Syntra logo
S24

Syntra

Medical chart intelligence

Tabula logo
S24

Tabula

Autonomous Accounting Software

Tandem logo
S24

Tandem

AI-native office leasing broker

technology

TaxGPT logo
S24

TaxGPT

AI tax assistant for professionals and businesses

United States

Terra logo
S24

Terra

Design and sell products in minutes

hardware · United States

The Forecasting Company logo
S24

The Forecasting Company

Foundation models for time series

technology · United Kingdom

The Synthesis Company logo
S24

The Synthesis Company

100x faster scientific evidence synthesis

Theseus logo
S24

Theseus

GPS Denied Navigation for Drones

Thunder Compute logo
S24

Thunder Compute

The world's cheapest GPU cloud

Thyme logo
S24

Thyme

The OS for financial advisors

Tivara logo
S24

Tivara

The AI workforce for medical groups

TradeFlow logo
S24

TradeFlow

AI-powered settlement for financial securities

Typa logo
S24

Typa

The content engine that wins attention and drives growth.

Ultra logo
S24

Ultra

Practical, general-purpose robots for repetitive industrial tasks

Unbound logo
S24

Unbound

Use AI tools without fear of data leakage

technology · United States

Undermind logo
S24

Undermind

An AI agent for scientific research

Understood Care logo
S24

Understood Care

Healthcare personal assistants for Medicare patients.

Unsloth AI logo
S24

Unsloth AI

Open-Source Reinforcement Learning (RL) & Fine-tuning for LLMs.

technology · United States

Usul logo
S24

Usul

AI Platform for Winning Defense & Government Contracts

Vendra logo
S24

Vendra

Custom Parts, Manufactured in America 🇺🇸

Vera Health logo
S24

Vera Health

AI-powered clinical decision support for healthcare providers

Vibe logo
S24

Vibe

Making everyone a software engineer

VideoGen logo
S24

VideoGen

AI that can create and edit professional videos

Village Labs logo
S24

Village Labs

Helping America's businesses become employee owned

Void logo
S24

Void

The open source Cursor alternative

Voker logo
S24

Voker

The Agent Analytics Platform

Weave Robotics logo
S24

Weave Robotics

Personal robots for the home--that ship in 2025

Weel logo
S24

Weel

GPS & dashcam smartphone app

Wordware logo
S24

Wordware

AI agents you can rely on

technology · United States

XTraffic logo
S24

XTraffic

Technology for cities to automate and manage their traffic lights.

Zeit AI logo
S24

Zeit AI

From data to enterprise insights in just a few words.

ZeroPath logo
S24

ZeroPath

Automatically find and fix your software vulnerabilities

Zettascale logo
S24

Zettascale

Energy efficient chips for AI

Zoa Research logo
S24

Zoa Research

Powerful quantitative forecasting models

Zuni logo
S24

Zuni

AI Assistant that works alongside you in your Chrome browser

autarc logo
S24

autarc

autarc is the agentic OS for energy installers.

bluedoor logo
S24

bluedoor

Professional-grade stock research in your terminal.

camfer logo
S24

camfer

Building the world’s first AI mechanical engineer.

d_model logo
S24

d_model

Look inside the model

deepsilicon logo
S24

deepsilicon

Software and hardware to run neural networks faster and cheaper

et al. logo
S24

et al.

Feed of insights extracted from your go-to sources using LLMs.

expand.ai logo
S24

expand.ai

Turn any website into an API.

ideate.xyz logo
S24

ideate.xyz

ideate.xyz is an AI-powered 3D art suite on the web

mdhub logo
S24

mdhub

AI-native operating system for behavioral health clinics.

omnidock logo
S24

omnidock

OS for global e-commerce expansion of brands & manufacturers

pap! logo
S24

pap!

Agents that earn consumers dollars when they shop, travel, and live.

winfunc logo
S24

winfunc

ai-native security engineering for mission critical codebases

Ångström AI logo
S24

Ångström AI

Gen AI molecular simulations that reproduce wetlab results

Summer 2023

(121 companies)
AIVideo.com logo
S23

AIVideo.com

Superhuman video production as a service

Accend logo
S23

Accend

AI agents for commercial underwriting at banks and fintechs

Affinity logo
S23

Affinity

A compliance training platform built for regulated industries.

AgentCollect logo
S23

AgentCollect

B2B debt collection powered by AI agents

Agentive logo
S23

Agentive

AI Workspace for Audit & Advisory Firms

Aglide logo
S23

Aglide

Connect every disconnected app to your SSO.

technology · United States

AiSDR logo
S23

AiSDR

AI sales prospecting. Replace your SDR with AiSDR

technology · United States

Airgoods logo
S23

Airgoods

Wholesale marketplace for food & beverage

Alguna logo
S23

Alguna

AI-Native CPQ & Billing for Modern Pricing Models

Andromeda Surgical logo
S23

Andromeda Surgical

Autonomous surgical robots

Apoxy logo
S23

Apoxy

Simpler and cheaper multi-cloud and cross-platform deployments.

Arcimus logo
S23

Arcimus

A stream of engineering candidates who ship.

Artie logo
S23

Artie

Software that streams data from databases to warehouses in real-time

enterprise

Atla logo
S23

Atla

The improvement engine for AI agents

technology · United Kingdom

Automorphic logo
S23

Automorphic

Infuse knowledge into language models with just 10 samples

Autotab logo
S23

Autotab

AI agents reliable enough to do real work

Baserun logo
S23

Baserun

Observability and evaluation platform for LLM apps.

Baud Labs logo
S23

Baud Labs

something new

Bland AI logo
S23

Bland AI

The enterprise platform for AI phone calls

business/productivity software · United States

Bolto logo
S23

Bolto

AI Powered All-In-One Payroll, HR + Recruiting

Branch AI logo
S23

Branch AI

AI Overview Search, as a Service

Bretton AI logo
S23

Bretton AI

AI agents for financial compliance (AML, KYC and Sanctions)

fintech · United States

Briefer logo
S23

Briefer

The collaborative data platform.

Bronco AI logo
S23

Bronco AI

AI for ASIC Design Verification

CORE logo
S23

CORE

Your AI butler that understands you really well and proactively acts…

Cair Health logo
S23

Cair Health

AI Agents for Healthcare RCM

CambioML logo
S23

CambioML

AI Teammate to Enable Every Knowledge Worker to Be a Top Performer

Campfire logo
S23

Campfire

The AI Native ERP for the fastest growing companies.

fintech · United States

CandorIQ logo
S23

CandorIQ

Headcount & Compensation Management

Capi Money logo
S23

Capi Money

Helping businesses in emerging markets make pay their international…

fintech · Nigeria

Cardinal Gray logo
S23

Cardinal Gray

Automating lenders' interactions with the DMV

CareOasis logo
S23

CareOasis

Get Paid for Family Caregiving

Cargo logo
S23

Cargo

Build your GTM workforce

Casca logo
S23

Casca

Make Banking Magical

Catamaran logo
S23

Catamaran

The AI-powered risk decision platform

Cedalio logo
S23

Cedalio

AI agents that automate AP, procurement, and finance

technology · Argentina

Cedana logo
S23

Cedana

Fast, reliable, reproducible AI with GPU live migration

Cembla logo
S23

Cembla

AI for legal & government

Cercli logo
S23

Cercli

AI powered HR and Recruitment for people teams

fintech · United Arab Emirates

Certainly Health logo
S23

Certainly Health

Marketplace to book doctors and avoid surprise bills

healthcare · United States

Chatter logo
S23

Chatter

Dead simple LLM testing and iteration

CheqUPI logo
S23

CheqUPI

India's first UPI wallet for foreign nationals and NRIs

Chow Central Inc logo
S23

Chow Central Inc

Asset Light Chipotle for Africa

Clearest Health logo
S23

Clearest Health

Rebuilding trust in American health insurance.

Coba logo
S23

Coba

Dual Currency Accounts For LatAm

CodeStory logo
S23

CodeStory

Aide is an AI-native , privacy-first IDE built on top of VSCode

Cognitio Labs logo
S23

Cognitio Labs

Automating FDA-grade Traceability Requirements with Sensors and AI.

Constructable logo
S23

Constructable

Building the next Procore

Continue logo
S23

Continue

Quality control for your software factory

Contour logo
S23

Contour

AI voice agents for healthcare operational calls

Converge logo
S23

Converge

All-in-one marketing measurement for B2C

Corgea logo
S23

Corgea

Corgea finds, and fixes insecure code and packages autonomously.

CraftOS logo
S23

CraftOS

Inventory Management and POS for the Wine industry

Craftwork logo
S23

Craftwork

Digital-native home painting franchise

services · United States

DataShare logo
S23

DataShare

Embed charts, dashboards and exports in your app

Deasy Labs logo
S23

Deasy Labs

Metadata for GenAI workflows

Decoda Health logo
S23

Decoda Health

The all-in-one EMR built for med spas and elective care

Diligent logo
S23

Diligent

AI agents for fintech risk and compliance operations

Dioxus Labs logo
S23

Dioxus Labs

Web, Desktop, and Mobile apps with one codebase in Rust

DisputeNinja logo
S23

DisputeNinja

Automate your chargebacks with AI agents

Docsum logo
S23

Docsum

AI contract repository

Eden Care logo
S23

Eden Care

Claims infrastructure for African health insurance

Electric Air logo
S23

Electric Air

Tech-enabled heat pump contractor that cuts costs by 60%

Elyos AI logo
S23

Elyos AI

AI Customer Service Agents for trades and field services

Elythea logo
S23

Elythea

ML to predict and prevent pregnancy complications

Empirical Health logo
S23

Empirical Health

Don't die of heart disease. Empirical is the first AI-native heart…

Envelope logo
S23

Envelope

Banking with built-in budgeting

Epsilla logo
S23

Epsilla

All-in-one platform to create AI agents with your private knowledge

Every logo
S23

Every

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

media · United States

Feanix Biotechnologies logo
S23

Feanix Biotechnologies

Farm Genetics Made Easy - Using DNA and Software

Fiber AI logo
S23

Fiber AI

The freshest data APIs for AI sales, recruiting, & growth products

FleetWorks logo
S23

FleetWorks

AI enabled marketplace matching trucks with jobs

business/productivity software · United States

Flex logo
S23

Flex

Stripe for HSA/FSA payments

Flint logo
S23

Flint

Personalized learning built for schools

FlowiseAI logo
S23

FlowiseAI

Open source GenAI development platform

Fortuna Health logo
S23

Fortuna Health

TurboTax for Medicaid

healthcare · United States

Foundation logo
S23

Foundation

Shopify for Homebuilders

Fragment logo
S23

Fragment

Turn manual operations into scalable processes

Giga logo
S23

Giga

AI Support Agent for Enterprises.

Glade logo
S23

Glade

Build games at the speed of thought

Gleam logo
S23

Gleam

Automating Data Entry for Clinical Trials

Glide logo
S23

Glide

Crypto Deposits, Wallet Funding, and Pay-with-crypto Infra

GreenTally logo
S23

GreenTally

Affordable carbon tracking solution for all businesses

Guac logo
S23

Guac

AI-powered forecasting & replenishment for grocery

HappyRobot logo
S23

HappyRobot

Intelligence that runs your operations.

technology · United States

Health Harbor logo
S23

Health Harbor

Using generative AI to call insurance for healthcare clinics

Healthtech 1 logo
S23

Healthtech 1

Automating repetitive processes in healthcare

Hegel AI logo
S23

Hegel AI

Open source tools for developing generative AI applications

Hiro logo
S23

Hiro

Your first security hire

HockeyStack logo
S23

HockeyStack

The operating system for inbound B2B revenue

enterprise applications · United States

HyLight logo
S23

HyLight

Small unmanned hydrogen airships for long range monitoring

industrials · France

Hyperbound logo
S23

Hyperbound

Revenue Activation Platform

Inari logo
S23

Inari

Your junior AI product manager

Inconvo logo
S23

Inconvo

Build chat-with-data agents for customer-facing applications

Inlet logo
S23

Inlet

AI timekeeping for legal professionals.

Inventive AI logo
S23

Inventive AI

AI Agents For RFP and Questionnaire Response Automation

Khoj logo
S23

Khoj

AI for humans

Kino AI logo
S23

Kino AI

Kino is an AI media manager and video editor for humans and agents.

Kips Health logo
S23

Kips Health

The only patient engagement software that pays you.

Kite logo
S23

Kite

Screen recorder for stunning product demo videos

Kobalt Labs logo
S23

Kobalt Labs

AI-powered risk and compliance for financial institutions

technology · United States

Langdock logo
S23

Langdock

The all-in-one AI platform for companies.

technology

Leafpress logo
S23

Leafpress

AI Energy Management

Letter AI logo
S23

Letter AI

Empowering B2B sellers with AI-powered training, coaching, and content

technology · United States

Letterbook logo
S23

Letterbook

AI-native customer support platform

Lifelike logo
S23

Lifelike

LifestyleRx logo
S23

LifestyleRx

Virtual Care for Type 2 Diabetes Reversal

Linc. logo
S23

Linc.

AI Copilot for Shippers, Carriers and Brokers

Line.Build logo
S23

Line.Build

Incentives and financing for energy efficiency upgrades

Lio (formerly askLio) logo
S23

Lio (formerly askLio)

The World's First Multi-Agent System for Procurement

Lysto logo
S23

Lysto

Revenue intelligence platforms for startups

MICSI logo
S23

MICSI

Higher resolution MRI with faster scan times.

Magic Loops logo
S23

Magic Loops

Program computers with natural language

Mandel AI logo
S23

Mandel AI

AI Supply Chain Coordinator

MantleBio logo
S23

MantleBio

Transform scientific data into discoveries

healthcare · United States

Margin logo
S23

Margin

POS & operating system that makes liquor stores more money

Maven Bio logo
S23

Maven Bio

The AI Platform for Life Sciences Intelligence

MediSearch logo
S23

MediSearch

Search engine for trustworthy medical information.

Metalware logo
S23

Metalware

Firmware cybersecurity

Metoro logo
S23

Metoro

AI SRE For Teams on Kubernetes

Midrender logo
S23

Midrender

Turn product features into launch videos

Page 17 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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