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 2024
(200 companies)
Celest
The Vercel of Flutter

Centauri AI
The Modern ETL and Data Science Platform for Finance

Centralize
The relationship intelligence platform for enterprise revenue

Circleback
AI-powered meeting notes and automations
technology · United States

Clarion
The AI communication layer for healthcare

Clarum
AI agents for private market diligence, monitoring, and reporting

Cleva
USD banking platform for Africa

CloudCruise
The developer platform for fast and reliable browser agents

CoCrafter
B2B construction marketplace to match contractors and subcontractors.

CodeAnt AI
Autonomous offensive and defensive security platform

CommodityAI
The AI operating system for commodity operations

Conduit
Conversational AI agents for Customer Service.

Consul
The Stablecoin Payouts Platform

Copper Health
Modern patient engagement and remote therapeutic monitoring platform

Cora
AI Fitness Coach

CrowdVolt
The integration layer for live events infrastructure

DGI Apparel
Expedia for ordering blank apparel

Datacurve
Frontier coding data for training and evaluating LLMs

Decipher AI
QA agents that write tests 10x faster with zero maintenance

Deep24
AI coach for your entire life

Deepnight
Building The Next Generation of Night Vision Devices
technology · United States

Diana
Give Your Employee An Employee

Dime
Dime automates administrative busywork at healthcare clinics

Downlink
Make your LLMs 3x faster.

Draftaid
Go from 3D models to CAD drawings using AI

Dragoneye
Custom video detection models in less than 5 minutes

Driver
Context for Codebases

Dropback
The front office software suite for college sports

DryMerge
AI that updates your CRM for you

Duckie
Build AI Support Agents in Minutes

Ecliptor
AI and Embeddings.

EdgeTrace
Describe It. Find It. Act On It.

Eggnog
Fun with AI video

Ellipsis
AI code reviews & bug fixes
technology · United States

Elodin
Unified flight software and hardware for the mission of tomorrow
high tech · United States

Engines
Setup any repo with one command

Eris Biotech
Our drugs engage the immune system to fight tumors

Event Horizon Labs
AI-native hedge fund using agents to automate quant research—at scale

Fileforge
API For PDF Document Workflows

Firebender
Most powerful coding agent for Android engineers

Fluently
Speaking coach for non-native English professionals
technology · United Kingdom

Focal
AI video creation tool for TV shows and movies

Forge
Getting companies refunds on tariffs & duties

Forge Rewards
Starbucks app for restaurants

Fractal Labs

FurtherAI
AI Workforce for the Insurance Industry

Garage
Marketplace for America's most essential assets

GetCrux
AI Creative Strategist

Givefront
Nonprofit Financial Management

Glimmer
AI search for massive PDFs

GovernGPT
The RFP Platform Asset Managers Adopt

Granza Bio
Reprogramming Immunity for Target-Specific Medicines
healthcare · United States

Greenboard
Modern OS for the financial back office.

Greptile
AI code review agent with complete context of your codebase
developer tools · United States

Guide Labs
Interpretable AI models and agents

Gumloop
A no-code platform for creating agents and automating workflows with…
Canada

Haplotype Labs
Personalized prevention using genetics and AI

Happenstance
People search powered by AI

Hatchet
The orchestration platform for teams who ship.

Hazel
AI-enabled procurement for government

Healia
Modern health insurance for dual income families

HeartByte
GenAI Interactive story. Creator write fictions 10x faster.

InQuery
Intelligent Medical Record Reviews

Indemni
Cargo Theft and Fraud Prevention Platform

Infinity
Business banking for cross-border SMBs & Startups
fintech · India

InspectMind AI
AI agent for construction drawings review

Integuru
Generate fast, reliable APIs for any platform

Junction Bioscience
AI Hypothesis Engine for Molecular Discovery

JustAI
Agentic Marketing Platform

K-Scale Labs
Open-source humanoid robots

Kabilah
Pioneering Generative AI for Nursing

Keystroke
n8n for coding agents

Lantern
Postgres vector database extension to build AI applications

Latted
A Unified Editor For AI Video

Leaping
Automate bug resolution

Legora
The AI workspace for lawyers
enterprise saas · Sweden

LemonSlice
Give your voice agents a face
technology · United States

Lucite
Supercharging Insurance Brokers & Advisors

Lumetric
The AI Analyst For Deal Teams

Lumona
AI-enabled search engine featuring insights from social media.

Magic Hour
Platform for AI video generation.

Maia
AI relationship app that keeps couples together

Maihem
Adaptive AI welding robots for manufacturers of any scale

Mango Health
AI Therapy for OCD

Manifold Freight
Aggregating Spot Freight Opportunities for Carriers

Marblism
AI Employees who love overtime

Marr Labs
AI-voice agents that are indistinguishable from humans.

MathDash
Learning Platform for Math Competitions

Mathos
Ultimate AI Math Problem Solver to Revolutionize Personalized Learning

Meticulate
Making it easy for B2B sales teams to send stellar outbound

Metofico
No Code Data Analysis for Life Science Research

Miden
Card issuer processor and banking stack for businesses in Sub-…

Million
Tools for agent verification

Model ML
AI Workspace for Financial Services.

Momentic
The AI-native automated testing platform
technology · United States

NanoCorp
Autonomous Companies Run by AI Working While You Sleep.

Navier AI
Agent-Driven Engineering

Newton
AI-powered phone platform for dentists
healthcare · United States

NowHouse
NowHouse helps stock brokerages settle trades instantly.

Nuanced
Nuanced makes AI coding agents and tools smarter with static analysis.

Octolane AI
Self-Driving AI CRM
technology · United States

Ocular AI
Applied AI Data Research Lab Encoding Human Expertise into Machines…

OddsView
The Bloomberg Terminal of Sports Betting

OffDeal
AI-native investment bank for small businesses

Oma Care
Get paid for taking care of your parents.

OmniAI
AI Agents for Commercial Lending

OneGrep
AI Agent for DevOps Workflow Automation

Onyx
Open Source AI Chat

Open
Enterprise AI customer support

OpenFoundry
The fastest developer experience for building on open source AI.

Opencall
Practice admin run by AI

Openmart
Local business data intelligence platform

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

Paradigm
A reimagined workspace with AI at its core

Parallel
AI agents for healthcare admin
cannabis · United States

ParcelBio
Elevated mRNA for transformative medicines.

PartnerHQ
A marketplace for B2B businesses to buy warm intros.

Patchwork
Your team’s AI powered communication tool

Pazi
Platform where autonomous companies are built

Penciled
AI front office assistant for physical therapy

Piramidal
Foundation Model for the Brain

Pivot Robotics
AI for Robot Arms in Factories
enterprise · United States

PointOne
AI Time Platform for Law Firms

Polar
The smarter way to manage USD earnings globally

Polished
Generate ads. Iterate till perfect.

Powder
AI Agents for precise document analysis
fintech · United States

Precip
High precision AI weather models

Preloop
Translate your experimental scripts into production ML services

Pretzel AI
AI tooling

ProSights
ProSights is an AI-native data extraction tool for financial…

PromptArmor
LLM Security and Compliance

Quary
The first in-browser analytics engineering platform

Quivr
AI-powered auto-resolutions and reply suggestions for customer…

ROE
AI for risk and compliance

RadMate AI
Copilot for radiologists

Raindrop
Sentry for AI Agents
enterprise applications · United States

Reducto
The complete agentic document platform
technology · United States

Reform
Workflow automation. Built for logistics.

Relari
AI Agent Builder for Software 3.0

Reprompt
AI Agents for Location

Resonance
Self-improving content bank for marketing

Respan
Self-driving observability, evals, and gateway for AI agents

RetailReady
An AI-powered supply chain compliance engine
consumer · United States

Retell AI
Supercharge Your Contact Center Operations with AI Phone Agents
technology · United States

Risotto
Risotto auto-solves IT support requests using AI

Rove
Travel the world for free.

Ryse
The secondary market for real estate leases

Saga AI
Voice Agents for Healthcare Operations

Salvy
Mobile carrier for businesses in Brazil
telecom · Brazil

Sample
Flexible systems for clinical reasoning.

Scout
AI insights for consumer products

Scritch
AI operating system for veterinary care

Selera Medical
One-time, device-based treatment for heart failure

Senso
Control what AI says about you

SevnAI
AI Gaming

Shepherd
Every student's personalized learning assistant

Shiboleth
Shiboleth automates lending compliance for financial institutions…

Silogy
An AI-powered test and debug platform for chip developers

Solari AI
Gives non-technical team members agents that work right out of the box

Sonauto
Create hit songs with AI

Sonia
Validated mental health support in your pocket, anytime.

Soundry AI
Remix any song into any style

Spark
AI-powered workflows for energy infrastructure

Speck
AI Notetaker that automates all your admin work

Stacksync
Real-time and two-way sync between CRMs and Databases

StarJar
Starjar automates inbound document processing workflows for hospitals

Stitch Technologies
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Superagent
Red teaming for AI agents

SuretyNow
The Modern Surety Bond Platform

SynsoryBio
"If-then" conditional logic for protein drugs

Tamarind Bio
AI Inference Platform for Drug Discovery

Terrakotta
AI platform for phone-first sellers

Tesseral
The open source platform for managing identity in business software
enterprise infrastructure · United States

The New Money Company
Invoicing that pays you even if your buyer doesn’t

Thorntale
The world's best presentation editor, powered by AI.

TokenOwl
AI portfolio tools for the next generation of finance

Toma
AI for Underserved Industries

Toolify
Build internal tools with AI

Topo
AI Agents for outbound working by your side

Tower
M&A due diligence platform powered by AI

Tracecat
The open source AI-native security automation platform

Trellis AI
AI for streamlining healthcare paperwork

Trieve
All-in-one API for search, RAG, & recommendations
technology · United States

Triply
Operating system for travel businesses in Africa with embedded finance

TrueClaim
Transparent, AI-powered healthcare TPA.

Tuesday Lab
Delightful robots

Tusk
AI agent that generates unit and integration tests

Ubicloud
Open source alternative to AWS

Upsolve AI
Deploy trustworthy data agent that know your business

Veles
CPQ for humans and agents

Velorum Therapeutics
Breakthrough medicines unlocking the biology of heme

Verse Therapy
Connecting All Ages with Speech Language Pathologists

Vibrant Labs
RL environments for long horizon AI Agents

Vista Power
Batteries and solar for $0 upfront to help businesses save money

Voicepanel
AI agents for customer research

VoxOps AI
Voice AI for Automotive

Wavelength
Build Magical Customer Experiences

Whip
A social feed for interactive AI Creations

Wuri
App to read fiction stories as visual novels with images, videos,…

Yarn
Make sales and marketing videos with AI.
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.