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.
Pro Rata 2026
(157 companies)
Bloom
The brand layer for agents
healthcare · Belgium
Callab AI
AI voice agents for legacy telephony systems.
CentralComs
Property Management AI Agents that automate leasing and maintenance.
CharacterQuilt
AI infrastructure for marketers. Ship campaigns in your tools in an…
Chert
iMessage infrastructure for trusted communication at scale
Chronicle Labs
Staging Environments for Enterprise AI Agents
Cignara
AI agents for sales & customer support at large Fortune 500 companies
Clara
AI primary care doctor
Clawvisor
The Authorization Layer for AI Agents
Cohesion
Your public equities agentic teammate
Complir
Vanta for physical products
Datost
AI data analyst in Slack. Democratize data.
Dayjob
AI Agents for Industrial Logistics
Deep Interactions
Collaborative AI app builder for teams
Dispatch
Satellites for manufacturing in space
Drafted
Design your home instantly with AI
Drip
The operating system for enterprise deal execution
Eden Robotics
Autonomous services for humanity.
Elyra
AI Reservation System for Restaurants
Enjamb Labs
Full stack AI Agents accelerating Biopharma R&D
Expanse
Unlock wasted GPU capacity.
FinalDose
Programmable DNA drug destroying all cancers, unlocking 80% of targets
Foaster
The AI-native consulting firm for AI transformation.
Foresight
On-demand consumer insights
Framewise Health
AI-native patient engagement
Fuchsia
Hardware compliance done on your timeline
General Aviation
Fix ATC by connecting aircraft to the internet
General Instinct
Deploy AI into any edge device, fully offline, maximum performance.
Gigacatalyst
Customize your software to every user with AI
Gojiberry AI
AI GTM agents for lean sales teams
GovGuard
AI Infrastructure for Government Agencies
Gravy
AI Agent for your personal finances.
HEVN, inc
The automated USD account for global internet companies
Harbor
AI-native CRO for clinical trial operations
Hedge
AI-Native specialty insurance company
Hessian
We forward deploy with AI agents to automate business operations
Hexa
The OS for Manufacturers and Distributors
HeyClicky
An AI buddy that lives on your Mac.
Hub.xyz
The API for real-world training data.
Humwork
Connect AI agents to human experts in 30 seconds
Huscarl
Actuarial intelligence for corporate risk managers
Hyper
The Self-Driving Company Brain
Imperfect
AI coach for athletes with real lives and epic goals
InLoop Robotics
Staff your warehouse with robotic employees today
Incandor
Behavioral intelligence infrastructure for anti-fraud
Indexable
sandbox infrastructure for AI agents
Infera
Control lab instruments with natural language.
InsForge
The agent-native cloud infrastructure platform
InstaAgent
Scale marketing campaigns across hundreds of personas
Intelligence Factory
Human Intelligence for Robots
Interfaze
AI model built for deterministic developer tasks
Inth
Privacy compliance, enforced in code
Juno
AI Health Assistant for Chronic Illness
KelAI
Intelligence platform for systematic market insights
Keyframe Labs
Turn agents into lifelike video calls. $0.06 a minute.
Kimpton AI
AI for portfolio managers
Kinect
Agentic Storefronts for E-Commerce Brands
Kinro
AI sales agents for insurance. Sell everywhere your buyers are.
Klaimee
Liability insurance for AI Agents. You deploy agents, we cover you.
Klarify
AI Agent for Therapists
Korso
The Intelligence Layer for Manufacturing.
KugelAudio
Kugel is an on-prem enterprise TTS supporting 25+ languages
Kuli
AI coworker for marketing teams
Lab0
Automated forward-deployed engineers (AI FDEs)
Lamina Labs
Visual infrastructure for EdTech AI applications
Lattice Health
The operating system for clinical AI in imaging
Light Anchor
AI-run consumer brands
Lightsprint
Collaborative product development platform
Limrun
Extend your cloud agent with XCode, Android and more
Lumius
Fast, smart, accessible 3D ultrasound for everyone
Madrone
Maximizing compute via hyper-efficient cooling
Manicule
AI Native Developer Relations
Maquoketa Research
The intelligence layer for one-way attack drones
Memoir
AI-Native Marketing for Developer Tools
Memory Store
Shared context for all of your team's agents.
Minicor
RPA platform for deploying AI into legacy desktop systems
Mochatrade
US stock perps for global traders
Modern
The AI-native OS for IT
Mount
The AI-Agent Insurance Carrier
Napkin Math
Building Napkin Math, hyper-personalized AI food journal
Netter
Data Science Autopilot for the real economy.
Nine Fives
Simple, Networked, Driverless, RF Test Equipment
Oddpool
Institutional data layer for prediction markets
Ontora
AI agents that interview every employee to map how work gets done.
OpenProse
A natural language agent framework: write the future into existence.
OpenWork
The open source alternative to Claude Cowork
Ornadyne
We're building robot birds for surveillance.
PLAN0 AI
AI powered construction cost estimation & analytics.
Pairio
AI-native industrial maintenance software
Panacea
AI-Native FDA Regulatory Services
Parrot
AI-native operating system for auto shops
Pavoot
AI Event Manager for Customer Events
Pentagon
A coordination layer for humans and agents.
PerfectBit
Training data for frontier AI labs
Playabl.ai
Prompt-to-play AI game builder for everyone
Pops
Create & play AI games with friends
Prism
AI-native recruiting agency
Probe
Agent-Native Incident Management
ProjectX
Infinity: the first OS where humans and agents work with no limits.
Prototyping.io
Autonomous manufacturing for mechanical parts
RASPIRE
No-code runtime app security with AI
ReasonBlocks
The runtime layer that makes AI agents cheaper and more reliable
Refortifai
AI Agents for Analog Circuit Design
Regbase
Tracking global laws, grants and consultations
RentAHuman
Marketplace for AI agents to hire humans.
Replicas
Background coding agents for engineering teams
Result
Where new internet entrepreneurs build and run their companies
Revnu
Everything but the app itself
River Markets
Prime brokerage for prediction markets
Rudus
AI Takeoffs Built for Concrete
Runtime
Sandboxed coding agents for everyone on your team.
Saffron
Helping your company find 10x engineers.
Salesgraph
the context layer for fast moving sales teams
Saudara AI
AI sourcing broker connecting brands with vetted overseas factories
Sazabi
The AI-native observability platform for fast-moving engineering teams
Scope
We make your product discoverable and usable by any AI agent
Sherpa
Turn more website visitors into customers
Sidekick
AI-powered SMS assistant for deskless workers.
Silmaril
Prompt injection defense that is self-healing
Smartbase
Automated order entry for manufacturers
Soria
AI Bloomberg Terminal built for Healthcare (and beyond)
StableBrowse
Browser Layer for AI agents
Stage
Code review platform for AI generated code
Standard Signal
Hedge fund where AI researches and executes every trade
Standout
Agentic hiring marketplace
Superlog
Observability that installs itself and fixes the bugs it finds.
Superset
The IDE for the AI Agents Era
Surtr Defense Systems
The open operating system for counter-UAS
Synphony
robots & software for farms
Taiga
Full-stack Medical Billing Services
TakeCareOS
Building infrastructure for AI-native care providers
Tasklet
The cloud agent operating system for knowledge work
Tenet Industries
Low-cost, mass-produced strike drones
TesterArmy
Test your app with AI, catch bugs before users do
The Company Company
The last agent your company will ever need.
Thomas
The first AI founder: a virtual human who runs his own companies.
Totalis
derivative layer for prediction markets
Trellis
Autonomous Agents for Short Term Rentals
Twolabs
Humanoid robots for caregiving.
Uno Wallet
The AI wallet that picks the best card at checkout.
Userlens
AI CSM that never misses churn and upsells.
ValCtrl
ValCtrl is the world model for Prediction Finance, and Kassandre…
Voquill
The AI coworker that helps pathologists work cases faster
Walter
AI Employee for Manufacturing Operations
Wato
Shared memory, tools, and workflows for agents across teams
Wealor
AI-native platform for wealth managers
WithAI
Custom command centers for hedge funds
YouArt
Patreon for AI originals
Zibra Labs
HPC for Quant Trading Firms running backtesting at scale.
Zolvo
AI that automates servicing for commercial lenders
flowscope
AI-native consulting to map and automate business processes
jo
A new personal AI that actually knows you.
matforge
AI scientists to discover semiconductor materials
primitive
Communication for agents
qomplement
The Agentic ERP for supply chain operations
smol machines
Ship software faster with portable, self contained virtual machines.
transload
Measure freight items with security cameras
Pro Rata 2025
(43 companies)
Acolite
AI Native Commercial Insurance Broker
Adentris
Real-time AI Compliance for Medical Documentation
Aegis
AI Agents to win denied health insurance claims.
Airweave
The open-source context retrieval layer for agents
technology · Netherlands
Alkali
The smarter way to estimate steel.
Almond
The most capable dual-arm robot for physical AI
Alpha Research
Open source, agentic knowledge bases for all of humanity's knowledge.
Anana
The agentic system of action for hotel groups and management companies
Aravolta
Software to monitor, control, and optimize data centers.
Atlog
Voice AI That Won't Get You Sued
Attune
Faster builds, zero effort.
Atum Works
Gigascale Nanomanufacturing
Auctor
The agentic operating system for modern system integrators.
Avallon AI
AI agents for insurance claims operations
Aviro
Environments for Long Horizon Tool Use
Beluga
Influencer marketing that converts
Besimple AI
Voice data for AI
Better Auth
The authentication framework for TypeScript
technology · Ethiopia
BitBoard
Let your agent build dashboards and reporting.
BitPatrol
AI-powered code security
Blaxel
The perpetual sandbox platform
Bloom
Build and share mobile apps in seconds
healthcare · Belgium
Bluejay
Test, monitor, and improve your voice and chat AI agents
Blueshoe
The AI platform for legal reasoning
Bond
Your AI Chief of Staff
Boost Robotics
Robots for the inspection and maintenance of data centers
Bramante
Life sciences instrument and reagent manufacturing
Cactus
All-In-One AI Growth Partner. Built for Trades.
technology · United States
Capacitive
The data gateway for agents.
Cartpole
Building reinforcement learning environments
Cascade Space
Deep space communications as a service
Casco
Autonomous security testing for web apps, APIs, cloud, and AI systems
Caucus
AI CRM for Government
Chestnut
The first AI mortgage lender
Chiron
Grammarly for Math ✏️
Chonkie
Deep research on autopilot
Claim Health
AI Revenue Platform for Post-Acute Care
Clarm
Capture inbound revenue whilst you build
Clidey
We turn your scattered data infrastructure into one platform your…
Code Four
Modernizing the police workflow.
Cohesive
The agentic CRM for blue-collar services
Combinely
AI coworker for Accountants
Cotool
AI Agents for Security Operations Teams
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.