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.
Winter 2023
(91 companies)
Propexo
Plaid for Commercial Real Estate

Pylon
The only customer support platform built for B2B.
financial services · United States

RUUF
Managed marketplace for solar in Latam

Radical
Building persistent, high-performance infrastructure in the sky

Rainmaker
DeFi for Everyone

Rally Tax
AI-native tax platform to save $1T+ for Americans

Reflex
The operating system for building mission-critical enterprise apps.
enterprise applications · United States

Relace
Models and infra for coding agents

Repacket
Employee security done for you.

Resend
Email for developers
enterprise applications · United States

Retape
AI workers for debt settlement

Rivet
Open-Source alternative to Durable Objects

Rollstack
Automate data-driven slide decks and documents with AI
technology · United States

Rubber Ducky Labs
AI Powered Product Discovery

Rubbrband
The creative agency

Ruby Card
Neobank for e-commerce businesses

Sage AI
Your self-generating, self-maintaining code knowledge base.

Salient
AI Servicing for Auto Lenders

Sameday
The leading AI workforce for the trades.

Sanvivo
Shopify for pharmacies in Europe

Scanbase
The API for Diagnostic Test Analysis (COVID-19, FLU, RSV, STD,…

Second
AI-Native Enterprise Codebase Maintenance

SensorSurf
Resolve PR check failures instantly with AI

Serial
Root cause manufacturing issues in seconds

Shekel Mobility
B2B marketplace for Auto Dealers in Africa
fintech · Nigeria

Sherloq
One place for all your queries, directly on your SQL editor

ShortLoop
Phone AI that Captures Every Dealership Revenue Opportunity

Shortbread
Read romance comics.

Sirdab
Cloud warehousing & supply chain platform in MENA

Skyhook
PaaS-like experience with the power of Kubernetes, on your cloud

Social Radar
Social Radar is the best way to search for posts, people, and…

Sorted
Instant SaaS management

SpecCheck
Unifying how the optical industry does business.

Speedy Labs
Maximize profits with AI-powered rebate management.

StackAI
The Enterprise AI Transformation Platform

Storyboarder
Tool and platform to create and sell webcomics
multimedia and design software · United States

Stralis Aircraft
Emission free hydrogen electric aircraft

Struct
Multi-lingual AI Voice Agents

Suger
Salesforce for Cloud marketplaces on AWS, Azure, GCP
technology · United States

SuperAPI
Programmable API gateway that makes APIs cacheable

SuperKalam
AI-Powered Super Mentor for Test Prep
education · India

Syncly
Social listening for the video era

TableFlow
AI Teammates for Data Tasks

Tagsafe

Tennr
Fast, Transparent Patient Experiences

Texel.ai
Run AI pipelines 10x faster

Theya
The world's simplest Bitcoin self-custody solution

Thread
Lifeline for your business

Traceloop
Know what your LLM is doing — and why it’s failing

Trackstar
Plaid for supply chain logistics

Trigger.dev
Build and deploy fully‑managed AI agents and workflows
technology

Trigo
Rent verification API for landlords and lenders

Truewind
AI-Powered Accounting
fintech · United States

Turntable
AI-native operating system for analytics teams

Type
The AI-first document editor.

Unify
AI teammates for real estate

Univerbal
Language learning with a conversational AI Tutor

Unstatiq
Single source of truth for your clinic's finances and supply chain.

Untether Labs
Scheduling software for digital health clinics to do more with less.

Upfront
A personal assistant for every homeowner

Vaero
AI for Human Writing

Variance
AI Agents for Fraud Review and Investigations

Vector
Advertising for the new internet

Vellum
technology · United States

Velos
Platform to automate manual back-office work

Vendah
Vendah is building a Faire-style marketplace for LATAM’s +50M…

Vendora
All-in-One Software for the $1T Grocery Industry

Verata
Network Intelligence for Investors

Versive
AI-first user research platform

Versori
Agentic integrations & automations for enterprise
technology · United Kingdom

Viddy
A new way to create landing pages that is video-native.

Vitalize
Transforming how health systems optimize labor

Vocode
Open source Voice AI

Vooma
Automation platform for logistics

Wallbit
Neobank for global remote workers

Warp
AI-native Employee Management Platform for High-Growth Companies
technology · United States

Waza
B2B payments platform for emerging markets.
fintech · Nigeria

Wild Moose
Automating root cause analysis with generative AI

Yuma AI
The AI Support Agent for Ecommerce

ZeroDev
Account abstraction wallets as a service

co.dev
Turn your ideas into full-stack apps

coil inc.
ai

compliant-llm
Detect every data leak into third-party GenAI tools

highlight.io
The open source, fullstack monitoring platform: stop guessing why…

inBuild
Workflow Automation for Construction Finance

infra.new
AI Agent for Cloud Infrastructure

moonrepo
Open source build tool for monorepos and large codebases

nunu.ai
Building the first multimodal agents to play and test games.
technology · United States

rex.fit
Automating nutrition tracking.

rift
B2B lead routing made simple

zudo.work
AI Workers for Warranty
Winter 2022
(109 companies)
AYC Fund
AI-native crypto hedge fund

Actipulse Neuroscience
Bringing non-invasive brain stimulation from the hospital to the home

Agave
AI Financial Operations for Construction

Agency
Agency replaces traditional security and compliance headcount with AI.

AgentRouter
API Router for AI Agents

Agentnoon
Org design and workforce planning platform to drive org transformation

AiSupervision
The operating system for factory production lines

AirMyne
Building systems to remove carbon dioxide from air at industrial scale
energy · United States

Airwork
On-demand labour that's actually good

Aklimate
Software for enterprises to track and reduce supply chain emissions

Alfie
Democratizing access to precision weight loss medications

Alga Biosciences
We stop cows from burping methane.

Alima
Fresh procurement made easy

Alixia
Targeting the Tumor Ecosystem to address cancer drug resistance.

Amal Invest
Investing app for Muslims

Andi
AI Search for the Next Generation

Andson Biotech
Empowering Mass Spec for Biotech and Beyond

Anfin
A multi-asset trading platform dedicated to retail investors
fintech · Vietnam

Anja Health
Cord Blood Banking Reimagined

Ankr Health
Virtualizing brick-mortar infrastructures of clinics w/ generative AI

AntWalk
An employee up-skilling platform for fast growing companies

Apollo
Payments & Loyalty Infrastructure

Arc
Banking & Funding for Startups
industrials · United Kingdom

Argo
A social streaming platform powered by creators and fans

Argument Computer Corporation
Accelerate verifiable computing

Arintra
Medical coding automation
healthcare · United States

Armilla AI
AI/LLM Assessment & Warranty Solutions

Arpari
Multibank treasury management

Aspora
Single account to manage money across the world

AstroForge
We Mine Asteroids

Atlas
Modern customer support platform replacement for Intercom and Zendesk

Attack Capital
Access the start-up asset class with vetted private companies

Attain
One-Stop Shop for Convenience Store Inventory

AvairSense
We go all out to Build the Smartest AI-Enabled Cameras!

Avocademy
We teach UX/UI design and then help people get great jobs.

Axis
Knowledge base for corporate affairs teams

Axross Pte Ltd
AI-driven HVAC control system for improved energy performance

BBy
BBy powders breast milk that's immunologically active & lasts 6 months

Bakool
Group buying for Fresh in Indonesia's tier 2 cities

Beam
AI-Native Cloud Platform

Bemlo
AI-native scheduling and workforce management platform for healthcare

Benson
Easily invest like the rich

Better Opinions
Prediction market of India
consumer internet · India

Beyond Aero
First electric business aircraft designed for hydrogen propulsion

BharatX
Enable Buy-Now-Pay-Later in a White-Labelled Manner
fintech · India

Bifrost
Wills and Estate Management for Crypto

Blaze
Marketing automation for the modern world

Blink
Build fully functional apps with AI.

Blitzllama
A platform to collect and analyze in-product user feedback

Boardcave
Building the world’s largest online surf gear store.

Bobidi
Restaurant Loyalty Using Quiz

BotCity
Observability and Governance for AI-Generated Python scripts.

Botin
Investment super app for Latin America

Boya
Corporate Expense cards and Spend management for businesses in Africa

Bracket
Two-way syncs between business tools and your database

Brainboard
Visually design and manage cloud infrastructures.

Broccoli AI
AI-native operating system for home service businesses

Brown Foods
Making 'REAL' Cow and Human Milk!

Bunkyr
Zero-Knowledge security without seed phrases or backup codes

CUTR
The marketplace for wood manufacturing

Carbon Crusher
We make carbon negative roads
construction and engineering · Norway

Cardda
All-in-one spend management for businesses in Latam

Cash Flow Portal
Investment management platform for real estate

Cashmere
Crypto wallet for web3 startups

Castia
Built Rewards for Latam. Pay Rent and get benefits.

Castled.io
Customer Engagement software on top of BigQuery/Snowflake

Cellbyte
AI Agents for Pharma Drug Launches

Cerebrium
Serverless Infrastructure Platform for AI

Cherry Recommends
Promotion management platform

Cinapse
The Operating System of Hollywood

Cinder
Infrastructure to protect companies from AI abuse

Circular
Subscription consumer electronics for Asia
consumer · Singapore

Clupp
Innovative insurance solutions for underserved markets.

Codec
Turn everyday videos into movies.

Cofactr
Cloud pre-factory logistics and procurement for electronics
technology · United States

CoffeeAI
Instant, hyper-personalized, AI-powered outreach messages

Cogram
The AI Platform for Architects, Builders, and Engineers

Complete
The complete way to do compensation

Complif
Compliance tools for financial companies in LatAm KYC & AML

Compra Rápida
One-click checkout and AI sales assistant for LatAm.

Convoy
Webhooks Gateway for outgoing and incoming webhooks.

Corveus Medical
Catheter-based solution to treat chronic heart failure.

Cotera
The fastest way to build an AI agent

Courtyard.io
Courtyard turns shopping into entertainment with instant liquidity
nft · United States

Cozmo AI
Multimodal AI Employees That See, Speak, Think and Do for Enterprises

Craniometrix
Using AI to help dementia patients age at home

CrediBook
Faire for Indonesia

Creizer
Clear.co for LATAM. Revenue based financing for online sellers.

Criya
AI that builds GTM assets in seconds

Curacel
AI-Powered Infrastructure for Insurance & Healthcare
fintech · Nigeria

Cypher
Crypto Neo-Bank (WhatsApp moment for bank accounts)

Darsel
Chatbot teaching K12 math in developing countries

Dart
The only truly AI-native project management tool

Dealls – Jobs & Mentoring
Indonesia's #1 ATS & Job Portal to match top talents & companies

Decent
Cross-chain routing + trading APIs. One-click transactions with any…
financial services · United States

Demo Gorilla
Make all your live SaaS demos impactful: close more ARR faster

DimOrder
Toast for Southeast Asia

Dioptra
Automated contract review with AI

Dojah Inc
Prevent Fraud and Onboard Users Faster
technology · Nigeria

Drivingforce
Rippling for trucking

Duplo
Venmo for B2B in Africa

Durioo
Streaming Platform for Muslim Children
media · Malaysia

Dynamo AI
Compliant-Ready AI for the Enterprise

Eazipay Inc.
Eazipay powers effortless payroll and financial access in Africa.

Elementary
Open-source data observability for data teams

Elevate (formerly Bloom)
US based USD accounts for non-US residents

Elphinstone, Inc.
Robo-advisory platform for Pakistan

Emigre
Banking in India for Indian expats (NRIs)

Emobi
A single point integration for secure and automated EV charging.
energy · United States
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.