Y Combinator B2B SaaS companies
Software sold to businesses. The most crowded category, which makes it the best place to study how successful applications carve a niche inside an obvious market.
1203 companies matched in the directory.
Showing the first 200 of 1203. Search the full directory to filter further.
- RoteYC Winter 2027· San Francisco, CA, USA· 0 people
AI-native insurance department for auto body shops
- AsyncYC Summer 2026· New York City, NY, USA· 2 people
AI agents that run small businesses
- OS3YC Summer 2026· San Francisco, CA, USA· 2 people
Affordable, intelligent humanoid robots built to deploy at scale
- Agentic FabriqYC Winter 2026· San Francisco, CA, USA· 2 people
The control plane for AI agents.
- CaptainYC Winter 2026· San Francisco, CA, USA· 2 people
Self-tuning search for products and files
- CorveraYC Winter 2026· San Francisco, CA, USA· 4 people
The AI sales agent for CPG brands
- Prescience, Inc.YC Summer 2026· San Francisco, CA, USA· 5 people
Superintelligent health insurance that keeps employees healthy
- 10x ScienceYC Winter 2026· San Francisco, CA, USA· 5 people
The AI-native platform for next-generation protein characterization.
- SalusYC Winter 2026· San Francisco, CA, USA· 2 people
Guardrails to validate your agent's actions before they execute
- Q2QYC Winter 2026· San Francisco, CA, USA· 2 people
We help private equity teams find acquisition targets faster
- UnissonYC Winter 2026· San Francisco, CA, USA· 2 people
AI agents that automate B2B software implementation
- Ressl AIYC Winter 2026· Bengaluru, KA, India· 3 people
Train, eval and build autonomous agents
- SupersetYC Spring 2026· San Francisco, CA, USA· 4 people
Building self-improving software
- o11YC Winter 2026· New York City, NY, USA· 2 people
AI account managers for consumer/self-serve apps
- CorelayerYC Winter 2026· San Francisco, CA, USA· 3 people
AI production engineer for regulated industries
- DreamYC Summer 2026· San Francisco, CA, USA· 2 people
Using VLMs to Catch Damage
- VeriadYC Winter 2026· London, England, United Kingdom· 2 people
AI operating system for advertising
- Poth LabsYC Summer 2026· San Francisco, CA, USA· 2 people
The customer brain that connects data to explain customer behavior
- TensorTestYC Winter 2026· San Francisco, CA, USA· 3 people
Evals, RL environments and training data for creative tasks
- Carrot LabsYC Winter 2026· San Francisco, CA, USA· 2 people
AI Cost Management: Track and attribute AI spend across every provider
- DatabuddyYC Fall 2026· San Francisco, CA, USA· 1 people
AI Data Analyst for fast-growing teams
- HedgeYC Spring 2026· San Francisco, CA, USA· 2 people
AI-Native insurance company
- MarkerYC Summer 2026· San Francisco, CA, USA· 3 people
Platform + FDEs that rebuild enterprises agent-first
- GodHandsYC Fall 2026· San Francisco, CA, USA· 2 people
Your company’s operating model, learned from the work.
- HEVN, incYC Spring 2026· San Francisco, CA, USA· 8 people
Cross-border payments for exporters of physical goods.
- DreachYC Spring 2026· San Francisco, CA, USA· 2 people
staffing firms with dreach grow revenue faster.
- KimptonYC Spring 2026· New York City, NY, USA· 5 people
Live Evaluation Arenas for Financial Work
- Lab0YC Spring 2026· San Francisco, CA, USA· 7 people
AI FDEs to make your B2B SaaS Go Live in Days, not Months
- Gojiberry AIYC Spring 2026· Paris, Île-de-France, France· 7 people
AI Go-To-Market agents for B2B teams
- Keyframe LabsYC Spring 2026· Los Angeles, CA, USA· 2 people
Bring AI to life with the world's best interactive avatars
- SidekickYC Summer 2026· San Francisco, CA, USA· 1 people
AI agent that manages manufacturing operations over text
- InferaYC Spring 2026· San Francisco, CA, USA· 2 people
Control lab instruments with natural language.
- AlchemizeYC Spring 2026· San Francisco, CA, USA· 2 people
Building AI Native Customs Brokerages
- CharacterQuiltYC Spring 2026· San Francisco, CA, USA· 4 people
Computer use agents to deploy enterprise marketing campaigns
- ExpanseYC Spring 2026· London, England, United Kingdom· 4 people
Unlock wasted GPU capacity.
- RevnuYC Spring 2026· Manchester, England, United Kingdom· 3 people
Your AI growth hire.
- Enjamb LabsYC Spring 2026· San Francisco, CA, USA· 2 people
The AI Workforce for Biopharma
- Amorphic LabsYC Summer 2026· San Francisco, CA, USA· 2 people
OpenRouter for Agent Tools
- GitCafeYC Summer 2026· San Francisco, CA, USA· 1 people
The Git forge for the next hundred billion commits
- KebraYC Summer 2026· San Francisco, CA, USA· 2 people
AI For The Skilled Workforce
- HERAYC Summer 2026· San Francisco, CA, USA· 2 people
We make sure every factory in the world builds without mistakes.
- Perceptron MLYC Summer 2026· San Francisco, CA, USA· 2 people
We make law firms AI-native.
- TropeYC Summer 2026· San Francisco, CA, USA· 2 people
AI FDE that deploys custom AI agents into ERPs
- KaraYC Summer 2026· San Francisco, CA, USA· 2 people
Making Diamond Semiconductors
- NebuSecYC Summer 2026· San Francisco, CA, USA· 4 people
Autonomous AI defense system for cyber attack
- ZommaYC Summer 2026· San Francisco, CA, USA· 5 people
The AI BPO for financial servies, run by computer-use agents
- RexYC Summer 2026· San Francisco, CA, USA· 2 people
AI-native BPO for enterprise order-to-cash
- MaingenYC Summer 2026· San Francisco, CA, USA· 2 people
Simulating Agents Running Industrial Companies
- StudioYC Summer 2026· San Francisco, CA, USA· 2 people
Accurately simulate market response at scale
- DialogusYC Summer 2026· San Francisco, CA, USA· 3 people
The AI-native contact center
- COACHYC Summer 2026· San Francisco, CA, USA· 4 people
The AI Coach for in person sales reps.
- GlenYC Summer 2026· San Francisco, CA, USA· 1 people
Institutional Learning Layer for Every Agent in Your Company
- Context.devYC Summer 2026· San Francisco, CA, USA· 6 people
We give AI agents realtime web context via API
- ZaplarYC Summer 2026· Stockholm, Stockholm County, Sweden· 3 people
Agentic Hotel Operating System
- screenpipeYC Summer 2026· San Francisco, CA, USA· 2 people
Turn your company's computer work into AI agents.
- Tarifflo Inc.YC Summer 2026· Salt Lake City, UT, USA· 5 people
Supply chain compliance and cost savings
- Aerogen SystemsYC Summer 2026· Ann Arbor, MI, USA· 4 people
Modernizing Chip Manufacturing Infrastructure
- WhitespaceYC Summer 2026· San Francisco, CA, USA· 2 people
AI Operating System for Wholesale Distribution
- Akon LabsYC Summer 2026· San Francisco, CA, USA· 2 people
Databricks for Enterprise Codebases
- RationalYC Summer 2026· San Francisco, CA, USA· 2 people
First Zero-human Accounting Firm
- TenorYC Summer 2026· San Francisco, CA, USA· 3 people
Infrastructure for building and scaling AI-native businesses.
- RisklyticsYC Summer 2026· San Francisco, CA, USA· 2 people
AI-Native Insurance for Frontier Tech
- LATOYC Summer 2026· San Francisco, CA, USA· 2 people
Predict how market participants behave
- NeuromorphicYC Summer 2026· San Francisco, CA, USA· 3 people
Building robots to automate wetlabs
- Luca IQYC Summer 2026· San Francisco, CA, USA· 5 people
API-first tax engine for CPA firms and developers
- RadleyYC Summer 2026· San Francisco, CA, USA· 2 people
The AI-native radiology practice
- Levocred AIYC Summer 2026· San Francisco, CA, USA· 2 people
The Bloomberg of Loans
- CarSignalYC Summer 2026· San Francisco, CA, USA· 2 people
The AI Operating System for Auto Shops.
- DecaworkYC Summer 2026· San Francisco, CA, USA· 2 people
Training company-specific models that approve AI actions.
- TokenlessYC Summer 2026· San Francisco, CA, USA· 3 people
We find flaws in RL environments and evals and help you fix them.
- Lamb LabsYC Summer 2026· San Francisco, CA, USA· 0 people
Lightning fast chips with hardcoded AI models
- PalisadeYC Summer 2026· San Francisco, CA, USA· 1 people
AI that finds and fixes OS-level vulnerabilities across device fleets
- HubbleYC Summer 2026· Seattle, WA, USA· 2 people
AI-native retrieval engine for medical records
- DockYC Summer 2026· San Francisco, CA, USA· 2 people
Multiplayer workspace for agents and humans
- PetrarchYC Summer 2026· San Francisco, CA, USA· 3 people
Internal industrial company data for frontier labs
- OneCLIYC Summer 2026· San Francisco, CA, USA· 0 people
The open source AI teammates for your company.
- OsseusYC Summer 2026· Remote· 2 people
The frontier data platform for aligned health and biological AI
- Billow AI LabsYC Summer 2026· San Francisco, CA, USA· 0 people
AI-native Accounting Firm that's killing Deloitte
- UFO.aiYC Fall 2026· San Francisco, CA, USA· 2 people
Next-generation agent operating system
- NeomatterYC Fall 2026· San Francisco, CA, USA· 2 people
AI that works for in-house legal teams
- EdviroYC Summer 2026· San Francisco, CA, USA· 2 people
AI That Operates Energy Infrastructure
- ConiferYC Summer 2026· San Francisco, CA, USA· 4 people
Least cost routing system to reduce 70%+ token spend
- OpenTagYC Summer 2026· San Francisco, CA, USA· 3 people
Model Agnostic AI coworker in Slack
- SaccadeYC Fall 2026· San Francisco, CA, USA· 2 people
World's Earliest Test for Alzheimer's Biomarkers
- Agent 37YC Fall 2026· New York City, NY, USA· 0 people
Persistent sandboxes for agents like hermes, openclaw, claude code
- SigmaYC Fall 2026· San Francisco, CA, USA· 2 people
Lakehouse-as-a-Service (LaaS)
- FaradayYC Fall 2026· San Francisco, CA, USA· 2 people
Agents running industrial enterprises from back office to shop floor
- Applied KineticsYC Fall 2026· San Francisco, CA, USA· 2 people
AI for the industries that power America.
- ForwardYC Fall 2026· San Francisco, CA, USA· 4 people
Unifying Global Private Credit
- MirrorsYC Fall 2026· San Francisco, CA, USA· 2 people
Give AI agents the right instructions at the right moment
- BryelYC Fall 2026· San Francisco, CA, USA· 2 people
Building in-house, frontier AI labs for companies
- Workers IOYC Fall 2026· San Francisco, CA, USA· 2 people
Simulation Environments for Verifying Mission Critical Software
- RysticYC Fall 2026· San Francisco, CA, USA· 2 people
API simulators for testing and training agents locally
- VoreliosYC Fall 2026· San Francisco, CA, USA· 2 people
A foundation model for engineering physics
- CoveraYC Fall 2026· San Francisco, CA, USA· 2 people
AI-native OS for insurance brokers
- PreloadYC Fall 2026· San Francisco, CA, USA· 3 people
Motor cortex for physical AI
- PapayaYC Fall 2026· San Francisco, CA, USA· 3 people
Continuous optimization for AI agents
- TilionYC Fall 2026· San Francisco, CA, USA· 4 people
Super fast, unblockable browser infra for agents
- DecentYC Fall 2026· San Francisco, CA, USA· 2 people
Your health plan should get better year-round. Not just once a year.
- LarkYC Fall 2026· San Francisco, CA, USA· 2 people
Lark - AI agents that automate workflows for wholesale distributors
- SintropixYC Fall 2026· Santiago, Santiago Metropolitan Region, Chile· 2 people
Autonomous accounting platform for global companies
- DeepMarkYC Fall 2026· San Francisco, CA, USA· 5 people
A live watermark inside AI voice that survives phone calls
- Boxes.devYC Fall 2026· San Francisco, CA, USA· 2 people
Cloud development environments for AI coding
- MSPilotYC Fall 2025· San Francisco, CA, USA· 3 people
Turn AI adoption into a recurring revenue line.
- StormyYC Summer 2025· San Francisco, CA, USA· 5 people
Stormy runs the office so your crew can run the work.
- QuantstructYC Winter 2025· San Francisco, CA, USA· 2 people
AI documentation engineer – test & autoimprove stale product docs
- OutshipYC Winter 2025· San Francisco, CA, USA· 3 people
Hire amazing engineers by seeing how they use AI
- VetnioYC Winter 2025· Stockholm, Stockholm County, Sweden· 6 people
AI Copilot that automates admin work for veterinary professionals
- Leaping AIYC Winter 2025· San Francisco, CA, USA· 13 people
AI voice and texting agents
- Excellence LearningYC Winter 2025· San Francisco, CA, USA· 4 people
AI tutor starting with maths and science
- PraximYC Winter 2025· San Francisco, CA, USA· 2 people
The agentic AI Word editor
- .WaveYC Winter 2025· Paris, Île-de-France, France· 2 people
Continuous inference for streaming AI models
- PromptlessYC Winter 2025· San Francisco, CA, USA· 5 people
An AI teammate that automatically updates your customer-facing docs
- TravaYC Winter 2025· San Francisco, CA, USA· 1 people
AI agents for global trade compliance
- Elip AIYC Winter 2025· San Francisco, CA, USA· 4 people
Cooking something sweet and salty!
- Caseflood.aiYC Winter 2025· Miami, FL, USA· 2 people
How elite law firms do intake
- WeaveYC Winter 2025· San Francisco, CA, USA· 16 people
AI to understand and then route engineering work
- SalesPatriotYC Winter 2025· San Francisco, CA, USA· 15 people
Supply chain superintelligence for distribution and procurement
- Cuckoo LabsYC Winter 2025· Seoul, Seoul, South Korea· 2 people
Real-time AI translator for global sales and marketing
- HUDYC Winter 2025· San Francisco, CA, USA· 24 people
Platform and marketplace for RL environments and AI data
- GaleYC Winter 2025· San Francisco, CA, USA· 3 people
Fast and Data-Driven Immigration Platform
- AsteroidYC Winter 2025· San Francisco, CA, USA· 6 people
The integration layer for healthcare: EHRs, payer portals & more
- CenoteYC Winter 2025· San Francisco, CA, USA· 2 people
AI agents for conversational commerce
- LopusYC Winter 2025· San Francisco, CA, USA· 2 people
Headless Data Team
- G LNKYC Winter 2025· New York City, NY, USA· 2 people
Simplifying Collaboration for Healthcare Organizations & Professionals
- TrataYC Winter 2025· New York City, NY, USA· 6 people
AI-powered research desk for hedge funds
- BystreetYC Winter 2025· San Francisco, CA, USA· 4 people
Connect with hotel owners around the world.
- RivieraYC Winter 2025· San Francisco, CA, USA· 2 people
AI Employees for Hotels
- NitrodeYC Winter 2025· San Francisco, CA, USA· 8 people
Frontier AI research to advance game development
- CalltreeYC Winter 2025· San Francisco, CA, USA· 14 people
Enterprise-grade AI support reps for call centers
- OutlitYC Winter 2025· San Francisco, CA, USA· 3 people
Protect and Grow Long-tail Revenue
- Sennu AIYC Winter 2025· San Francisco, CA, USA· 2 people
We turn traditional companies into AI companies
- InfiniteYC Winter 2025· San Francisco, CA, USA· 4 people
Global B2B Stablecoin Processor
- OpenIntakeYC Winter 2025· New York City, NY, USA· 2 people
The AI Front Door For Law Firms
- Artificial SocietiesYC Winter 2025· London, England, United Kingdom· 18 people
Foundational model of human societies for consequential decisions
- AfterQueryYC Winter 2025· San Francisco, CA, USA· 30 people
Applied research lab curating data solutions for foundation model…
- CorsairYC Winter 2025· New York City, NY, USA· 2 people
OpenRouter for Integrations
- SpottYC Winter 2025· Leuven, Flanders, Belgium· 50 people
AI-native ATS/CRM for recruiting firms
- BluebookYC Winter 2025· Stockholm, Stockholm County, Sweden· 4 people
AI for accounting
- ErgoYC Winter 2025· San Francisco, CA, USA· 9 people
Ergo is the context layer that helps revenue teams close more deals.
- MonteYC Summer 2025· San Francisco, CA, USA· 3 people
Continual Learning for Agents
- FrekilYC Spring 2025· San Francisco, CA, USA· 2 people
RWE Generation in minutes
- BitBoardYC Spring 2025· San Francisco, CA, USA· 2 people
Let your agent build dashboards and reporting.
- stratifyYC Spring 2025· San Francisco, CA, USA· 2 people
AI agents that help you understand your customers' needs
- FreesoloYC Spring 2025· San Francisco, CA, USA· 4 people
Product Native Models
- SixtyfourYC Spring 2025· San Francisco, CA, USA· 12 people
Intelligence Infrastructure on People and Entities
- PhotoniumYC Spring 2025· New York City, NY, USA· 5 people
AI-Powered Optical Consulting & Software
- ClideyYC Spring 2025· San Francisco, CA, USA· 5 people
Turn scattered data into one platform for decision-making
- HABITYC Spring 2025· San Francisco, CA, USA
Accelerating world models.
- MorphikYC Spring 2025· San Francisco, CA, USA· 2 people
AI workers for Skilled Nursing and Senior Living Operations
- throxyYC Spring 2025· London, England, United Kingdom· 55 people
Vertical AI agents running B2B outbound on autopilot, with human SDRs
- AnanaYC Spring 2025· New York City, NY, USA· 2 people
AI Workspace for Hospitality Commercial Teams
- IRBCYC Spring 2025· New York City, NY, USA· 3 people
AI-native financial institution for global businesses + agents.
- ThetaYC Spring 2025· San Francisco, CA, USA· 7 people
Specialized AI for Every Job
- QualGentYC Spring 2025· San Francisco, CA, USA· 10 people
AI Mobile App Quality Assurance Tester
- AlkaliYC Spring 2025· Houston, TX, USA· 2 people
The smarter way to estimate steel.
- VesenceYC Spring 2025· San Francisco, CA, USA· 10 people
AI for High-Stakes Work
- Eloquent AIYC Spring 2025· San Francisco, CA, USA· 5 people
The AI Operator for Financial Services
- ProboYC Spring 2025· San Francisco, CA, USA· 6 people
We help you get compliant while you focus on your business.
- AdentrisYC Spring 2025· San Francisco, CA, USA· 5 people
Real-time AI Compliance & Revenue Integrity for Medical Providers
- PelicaYC Spring 2025· San Francisco, CA, USA· 5 people
AI agents for risk-bearing healthcare organizations
- LumariYC Spring 2025· San Francisco, CA, USA· 5 people
AI Digital Workers for Supply Chain
- CactusYC Spring 2025· San Francisco, CA, USA· 2 people
All-In-One AI Growth Partner. Built for Trades.
- StarSlingYC Spring 2025· San Francisco, CA, USA· 3 people
Self-Driving CI: fast AI-native GitHub Actions runners
- BlueshoeYC Spring 2025· Boston, MA, USA· 2 people
The AI-Native Consumer + Plaintiff Law Firm
- BondYC Spring 2025· San Francisco, CA, USA· 3 people
Your AI Chief of Staff
- DocketYC Spring 2025· San Francisco, CA, USA· 2 people
AI agents for web testing
- CohesiveYC Spring 2025· New York City, NY, USA· 2 people
The agentic CRM for blue-collar services
- GETASAPYC Summer 2025· San Francisco, CA, USA· 30 people
AI-Native Fresh Produce Logistics
- CloseraYC Summer 2025· New York City, NY, USA· 2 people
AI Shopping Agent for Your Ecommerce Store
- truthsystemsYC Summer 2025· San Francisco, CA, USA· 6 people
Automatically blocking risky behavior with real-time governance agents
- LanesurfYC Summer 2025· San Francisco, CA, USA· 11 people
Book any load in 10 minutes
- argsYC Summer 2025· New York City, NY, USA· 2 people
A better GItHub
- Liva AIYC Summer 2025· San Francisco, CA, USA· 6 people
Building socially intelligent AI
- LarkYC Summer 2025· San Francisco, CA, USA· 5 people
The E2E testing layer for AI-driven development
- MonarchaYC Summer 2025· San Francisco, CA, USA· 2 people
Turn maps into data
- OnDeck AIYC Summer 2025· Vancouver, BC, Canada· 7 people
Analyze any footage, without training a model
- FrizzleYC Summer 2025· New York City, NY, USA· 2 people
AI Grading for Teachers
- ProliferateYC Summer 2025· San Francisco, CA, USA
Do your life's work with agents
- StocklineYC Summer 2025· Paris, Île-de-France, France· 2 people
AI-native ERP for food wholesalers
- PanoptiveYC Summer 2025· San Francisco, CA, USA· 2 people
The continuous oversight engine for clinical trials
- TraceYC Summer 2025· London, England, United Kingdom· 3 people
Context-aware orchestration between humans and AI.
- EmbedderYC Summer 2025· San Francisco, CA, USA· 6 people
Hardware-Aware AI for Embedded Software
- GhostEyeYC Summer 2025· New York City, NY, USA· 6 people
Your always-on red team.
- VibeFlowYC Summer 2025· San Francisco, CA, USA· 3 people
AI content manager that grows your company's online presence
- Physical TuringYC Summer 2025· New York City, NY, USA· 2 people
Next generation robot deployer
- ManufactYC Summer 2025· ZH, Switzerland· 5 people
Cloud infrastructure for MCP servers and Claude / ChatGPT plugins.
- MotivesYC Summer 2025· London, England, United Kingdom
Consumer focus groups run by AI
- FintoYC Summer 2025· Munich, BY, Germany· 10 people
AI accounting for enterprise finance teams
- ProcIndexYC Summer 2025· San Francisco, CA, USA· 4 people
AI-powered accounting automation for construction and manufacturing
- AutosanaYC Summer 2025· San Francisco, CA, USA· 5 people
AI agents for E2E testing across mobile & web
- F4 IndustriesYC Summer 2025· San Francisco, CA, USA· 5 people
The GD&T Analysis Platform for Engineering Drawings
- SigmanticAIYC Summer 2025· San Francisco, CA, USA· 2 people
The Cursor for Chip Design - Delivering Silicon-Ready Chip Designs…
- PallyYC Summer 2025· San Francisco, CA, USA· 2 people
Your personal AI Assistant
- Certus AIYC Summer 2025· San Francisco, CA, USA· 8 people
Replacing the restaurant phone line with Voice AI
- ReacherYC Summer 2025· San Francisco, CA, USA· 10 people
We automate creator marketing for the world's largest brands
- CLODOYC Summer 2025· San Francisco, CA, USA· 2 people
Planet-scale people discovery.
- RowFlowYC Summer 2025· New York City, NY, USA· 2 people
Replacing forms with AI conversations
- MunifyYC Summer 2025· Orlando, FL, USA· 4 people
The Cross-Border Neobank for the Middle East
- LapisYC Fall 2025· San Francisco, CA, USA· 5 people
AI that creates and runs ads, end-end