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.

Winter 2024

(200 companies)
Celest logo
W24

Celest

The Vercel of Flutter

Centauri AI logo
W24

Centauri AI

The Modern ETL and Data Science Platform for Finance

Centralize logo
W24

Centralize

The relationship intelligence platform for enterprise revenue

Circleback logo
W24

Circleback

AI-powered meeting notes and automations

technology · United States

Clarion logo
W24

Clarion

The AI communication layer for healthcare

Clarum logo
W24

Clarum

AI agents for private market diligence, monitoring, and reporting

Cleva logo
W24

Cleva

USD banking platform for Africa

CloudCruise logo
W24

CloudCruise

The developer platform for fast and reliable browser agents

CoCrafter logo
W24

CoCrafter

B2B construction marketplace to match contractors and subcontractors.

CodeAnt AI logo
W24

CodeAnt AI

Autonomous offensive and defensive security platform

CommodityAI logo
W24

CommodityAI

The AI operating system for commodity operations

Conduit logo
W24

Conduit

Conversational AI agents for Customer Service.

Consul logo
W24

Consul

The Stablecoin Payouts Platform

Copper Health logo
W24

Copper Health

Modern patient engagement and remote therapeutic monitoring platform

Cora logo
W24

Cora

AI Fitness Coach

CrowdVolt logo
W24

CrowdVolt

The integration layer for live events infrastructure

DGI Apparel logo
W24

DGI Apparel

Expedia for ordering blank apparel

Datacurve logo
W24

Datacurve

Frontier coding data for training and evaluating LLMs

Decipher AI logo
W24

Decipher AI

QA agents that write tests 10x faster with zero maintenance

Deep24 logo
W24

Deep24

AI coach for your entire life

Deepnight logo
W24

Deepnight

Building The Next Generation of Night Vision Devices

technology · United States

Diana logo
W24

Diana

Give Your Employee An Employee

Dime logo
W24

Dime

Dime automates administrative busywork at healthcare clinics

Downlink logo
W24

Downlink

Make your LLMs 3x faster.

Draftaid logo
W24

Draftaid

Go from 3D models to CAD drawings using AI

Dragoneye logo
W24

Dragoneye

Custom video detection models in less than 5 minutes

Driver logo
W24

Driver

Context for Codebases

Dropback logo
W24

Dropback

The front office software suite for college sports

DryMerge logo
W24

DryMerge

AI that updates your CRM for you

Duckie logo
W24

Duckie

Build AI Support Agents in Minutes

Ecliptor logo
W24

Ecliptor

AI and Embeddings.

EdgeTrace logo
W24

EdgeTrace

Describe It. Find It. Act On It.

Eggnog logo
W24

Eggnog

Fun with AI video

Ellipsis logo
W24

Ellipsis

AI code reviews & bug fixes

technology · United States

Elodin logo
W24

Elodin

Unified flight software and hardware for the mission of tomorrow

high tech · United States

Engines logo
W24

Engines

Setup any repo with one command

Eris Biotech logo
W24

Eris Biotech

Our drugs engage the immune system to fight tumors

Event Horizon Labs logo
W24

Event Horizon Labs

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

Fileforge logo
W24

Fileforge

API For PDF Document Workflows

Firebender logo
W24

Firebender

Most powerful coding agent for Android engineers

Fluently logo
W24

Fluently

Speaking coach for non-native English professionals

technology · United Kingdom

Focal logo
W24

Focal

AI video creation tool for TV shows and movies

Forge logo
W24

Forge

Getting companies refunds on tariffs & duties

Forge Rewards logo
W24

Forge Rewards

Starbucks app for restaurants

Fractal Labs logo
W24

Fractal Labs

FurtherAI logo
W24

FurtherAI

AI Workforce for the Insurance Industry

Garage logo
W24

Garage

Marketplace for America's most essential assets

GetCrux logo
W24

GetCrux

AI Creative Strategist

Givefront logo
W24

Givefront

Nonprofit Financial Management

Glimmer logo
W24

Glimmer

AI search for massive PDFs

GovernGPT logo
W24

GovernGPT

The RFP Platform Asset Managers Adopt

Granza Bio logo
W24

Granza Bio

Reprogramming Immunity for Target-Specific Medicines

healthcare · United States

Greenboard logo
W24

Greenboard

Modern OS for the financial back office.

Greptile logo
W24

Greptile

AI code review agent with complete context of your codebase

developer tools · United States

Guide Labs logo
W24

Guide Labs

Interpretable AI models and agents

Gumloop logo
W24

Gumloop

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

Canada

Haplotype Labs logo
W24

Haplotype Labs

Personalized prevention using genetics and AI

Happenstance logo
W24

Happenstance

People search powered by AI

Hatchet logo
W24

Hatchet

The orchestration platform for teams who ship.

Hazel logo
W24

Hazel

AI-enabled procurement for government

Healia logo
W24

Healia

Modern health insurance for dual income families

HeartByte logo
W24

HeartByte

GenAI Interactive story. Creator write fictions 10x faster.

InQuery logo
W24

InQuery

Intelligent Medical Record Reviews

Indemni logo
W24

Indemni

Cargo Theft and Fraud Prevention Platform

Infinity logo
W24

Infinity

Business banking for cross-border SMBs & Startups

fintech · India

InspectMind AI logo
W24

InspectMind AI

AI agent for construction drawings review

Integuru logo
W24

Integuru

Generate fast, reliable APIs for any platform

Junction Bioscience logo
W24

Junction Bioscience

AI Hypothesis Engine for Molecular Discovery

JustAI logo
W24

JustAI

Agentic Marketing Platform

K-Scale Labs logo
W24

K-Scale Labs

Open-source humanoid robots

Kabilah logo
W24

Kabilah

Pioneering Generative AI for Nursing

Keystroke logo
W24

Keystroke

n8n for coding agents

Lantern logo
W24

Lantern

Postgres vector database extension to build AI applications

Latted logo
W24

Latted

A Unified Editor For AI Video

Leaping logo
W24

Leaping

Automate bug resolution

Legora logo
W24

Legora

The AI workspace for lawyers

enterprise saas · Sweden

LemonSlice logo
W24

LemonSlice

Give your voice agents a face

technology · United States

Lucite logo
W24

Lucite

Supercharging Insurance Brokers & Advisors

Lumetric logo
W24

Lumetric

The AI Analyst For Deal Teams

Lumona logo
W24

Lumona

AI-enabled search engine featuring insights from social media.

Magic Hour logo
W24

Magic Hour

Platform for AI video generation.

Maia logo
W24

Maia

AI relationship app that keeps couples together

Maihem logo
W24

Maihem

Adaptive AI welding robots for manufacturers of any scale

Mango Health logo
W24

Mango Health

AI Therapy for OCD

Manifold Freight logo
W24

Manifold Freight

Aggregating Spot Freight Opportunities for Carriers

Marblism logo
W24

Marblism

AI Employees who love overtime

Marr Labs logo
W24

Marr Labs

AI-voice agents that are indistinguishable from humans.

MathDash logo
W24

MathDash

Learning Platform for Math Competitions

Mathos logo
W24

Mathos

Ultimate AI Math Problem Solver to Revolutionize Personalized Learning

Meticulate logo
W24

Meticulate

Making it easy for B2B sales teams to send stellar outbound

Metofico logo
W24

Metofico

No Code Data Analysis for Life Science Research

Miden logo
W24

Miden

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

Million logo
W24

Million

Tools for agent verification

Model ML logo
W24

Model ML

AI Workspace for Financial Services.

Momentic logo
W24

Momentic

The AI-native automated testing platform

technology · United States

NanoCorp logo
W24

NanoCorp

Autonomous Companies Run by AI Working While You Sleep.

Navier AI logo
W24

Navier AI

Agent-Driven Engineering

Newton logo
W24

Newton

AI-powered phone platform for dentists

healthcare · United States

NowHouse logo
W24

NowHouse

NowHouse helps stock brokerages settle trades instantly.

Nuanced logo
W24

Nuanced

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

Octolane AI logo
W24

Octolane AI

Self-Driving AI CRM

technology · United States

Ocular AI logo
W24

Ocular AI

Applied AI Data Research Lab Encoding Human Expertise into Machines…

OddsView logo
W24

OddsView

The Bloomberg Terminal of Sports Betting

OffDeal logo
W24

OffDeal

AI-native investment bank for small businesses

Oma Care logo
W24

Oma Care

Get paid for taking care of your parents.

OmniAI logo
W24

OmniAI

AI Agents for Commercial Lending

OneGrep logo
W24

OneGrep

AI Agent for DevOps Workflow Automation

Onyx logo
W24

Onyx

Open Source AI Chat

Open logo
W24

Open

Enterprise AI customer support

OpenFoundry logo
W24

OpenFoundry

The fastest developer experience for building on open source AI.

Opencall logo
W24

Opencall

Practice admin run by AI

Openmart logo
W24

Openmart

Local business data intelligence platform

PandasAI logo
W24

PandasAI

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

Paradigm logo
W24

Paradigm

A reimagined workspace with AI at its core

Parallel logo
W24

Parallel

AI agents for healthcare admin

cannabis · United States

ParcelBio logo
W24

ParcelBio

Elevated mRNA for transformative medicines.

PartnerHQ logo
W24

PartnerHQ

A marketplace for B2B businesses to buy warm intros.

Patchwork logo
W24

Patchwork

Your team’s AI powered communication tool

Pazi logo
W24

Pazi

Platform where autonomous companies are built

Penciled logo
W24

Penciled

AI front office assistant for physical therapy

Piramidal logo
W24

Piramidal

Foundation Model for the Brain

Pivot Robotics logo
W24

Pivot Robotics

AI for Robot Arms in Factories

enterprise · United States

PointOne logo
W24

PointOne

AI Time Platform for Law Firms

Polar logo
W24

Polar

The smarter way to manage USD earnings globally

Polished logo
W24

Polished

Generate ads. Iterate till perfect.

Powder logo
W24

Powder

AI Agents for precise document analysis

fintech · United States

Precip logo
W24

Precip

High precision AI weather models

Preloop logo
W24

Preloop

Translate your experimental scripts into production ML services

Pretzel AI logo
W24

Pretzel AI

AI tooling

ProSights logo
W24

ProSights

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

PromptArmor logo
W24

PromptArmor

LLM Security and Compliance

Quary logo
W24

Quary

The first in-browser analytics engineering platform

Quivr logo
W24

Quivr

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

ROE logo
W24

ROE

AI for risk and compliance

RadMate AI logo
W24

RadMate AI

Copilot for radiologists

Raindrop logo
W24

Raindrop

Sentry for AI Agents

enterprise applications · United States

Reducto logo
W24

Reducto

The complete agentic document platform

technology · United States

Reform logo
W24

Reform

Workflow automation. Built for logistics.

Relari logo
W24

Relari

AI Agent Builder for Software 3.0

Reprompt logo
W24

Reprompt

AI Agents for Location

Resonance logo
W24

Resonance

Self-improving content bank for marketing

Respan logo
W24

Respan

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

RetailReady logo
W24

RetailReady

An AI-powered supply chain compliance engine

consumer · United States

Retell AI logo
W24

Retell AI

Supercharge Your Contact Center Operations with AI Phone Agents

technology · United States

Risotto logo
W24

Risotto

Risotto auto-solves IT support requests using AI

Rove logo
W24

Rove

Travel the world for free.

Ryse logo
W24

Ryse

The secondary market for real estate leases

Saga AI logo
W24

Saga AI

Voice Agents for Healthcare Operations

Salvy logo
W24

Salvy

Mobile carrier for businesses in Brazil

telecom · Brazil

Sample logo
W24

Sample

Flexible systems for clinical reasoning.

Scout logo
W24

Scout

AI insights for consumer products

Scritch logo
W24

Scritch

AI operating system for veterinary care

Selera Medical logo
W24

Selera Medical

One-time, device-based treatment for heart failure

Senso logo
W24

Senso

Control what AI says about you

SevnAI logo
W24

SevnAI

AI Gaming

Shepherd logo
W24

Shepherd

Every student's personalized learning assistant

Shiboleth logo
W24

Shiboleth

Shiboleth automates lending compliance for financial institutions…

Silogy logo
W24

Silogy

An AI-powered test and debug platform for chip developers

Solari AI logo
W24

Solari AI

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

Sonauto logo
W24

Sonauto

Create hit songs with AI

Sonia logo
W24

Sonia

Validated mental health support in your pocket, anytime.

Soundry AI logo
W24

Soundry AI

Remix any song into any style

Spark logo
W24

Spark

AI-powered workflows for energy infrastructure

Speck logo
W24

Speck

AI Notetaker that automates all your admin work

Stacksync logo
W24

Stacksync

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

StarJar logo
W24

StarJar

Starjar automates inbound document processing workflows for hospitals

Stitch Technologies logo
W24

Stitch Technologies

-

Superagent logo
W24

Superagent

Red teaming for AI agents

SuretyNow logo
W24

SuretyNow

The Modern Surety Bond Platform

SynsoryBio logo
W24

SynsoryBio

"If-then" conditional logic for protein drugs

Tamarind Bio logo
W24

Tamarind Bio

AI Inference Platform for Drug Discovery

Terrakotta logo
W24

Terrakotta

AI platform for phone-first sellers

Tesseral logo
W24

Tesseral

The open source platform for managing identity in business software

enterprise infrastructure · United States

The New Money Company logo
W24

The New Money Company

Invoicing that pays you even if your buyer doesn’t

Thorntale logo
W24

Thorntale

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

TokenOwl logo
W24

TokenOwl

AI portfolio tools for the next generation of finance

Toma logo
W24

Toma

AI for Underserved Industries

Toolify logo
W24

Toolify

Build internal tools with AI

Topo logo
W24

Topo

AI Agents for outbound working by your side

Tower logo
W24

Tower

M&A due diligence platform powered by AI

Tracecat logo
W24

Tracecat

The open source AI-native security automation platform

Trellis AI logo
W24

Trellis AI

AI for streamlining healthcare paperwork

Trieve logo
W24

Trieve

All-in-one API for search, RAG, & recommendations

technology · United States

Triply logo
W24

Triply

Operating system for travel businesses in Africa with embedded finance

TrueClaim logo
W24

TrueClaim

Transparent, AI-powered healthcare TPA.

Tuesday Lab logo
W24

Tuesday Lab

Delightful robots

Tusk logo
W24

Tusk

AI agent that generates unit and integration tests

Ubicloud logo
W24

Ubicloud

Open source alternative to AWS

Upsolve AI logo
W24

Upsolve AI

Deploy trustworthy data agent that know your business

Veles logo
W24

Veles

CPQ for humans and agents

Velorum Therapeutics logo
W24

Velorum Therapeutics

Breakthrough medicines unlocking the biology of heme

Verse Therapy logo
W24

Verse Therapy

Connecting All Ages with Speech Language Pathologists

Vibrant Labs logo
W24

Vibrant Labs

RL environments for long horizon AI Agents

Vista Power logo
W24

Vista Power

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

Voicepanel logo
W24

Voicepanel

AI agents for customer research

VoxOps AI logo
W24

VoxOps AI

Voice AI for Automotive

Wavelength logo
W24

Wavelength

Build Magical Customer Experiences

Whip logo
W24

Whip

A social feed for interactive AI Creations

Wuri logo
W24

Wuri

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

Yarn logo
W24

Yarn

Make sales and marketing videos with AI.

Page 3 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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