YC B2B
1,135 Y Combinator companies tagged B2B, most in S21 (102).
Companies per batch
Companies
240 of 240 companies
RoteW27 · AIAI-native insurance department for auto body shops
Agent 37F26 · AIPersistent sandboxes for agents like hermes, openclaw, claude code
Applied KineticsF26 · AIAI for the industries that power America.
BryelF26 · AIDevin for AI Research Engineering
DecentF26 · AIContinuous optimization for employer health plans.
DeepMarkF26 · AIA live watermark inside AI voice that survives phone calls
FaradayF26 · AIIndustrial aOS between humans, agents, and robots
ForwardF26 · AIUnifying Global Private Credit
LarkF26 · AILark - Specialized agents for wholesale distributors
LightfieldF26 · AIAI that works for in-house legal teams
MirrorsF26 · AIFix your AI agent's errors at runtime, so they never happen twice
PapayaF26 · AIContinuous optimization for AI agentsSigmaF26 · AILakehouse-as-a-Service (LaaS) for pre and post-acquisition
SintropixF26 · AIAutonomous accounting platform for global companies
TilionF26 · AISuper fast, unblockable browser infra for agents
VoreliosF26 · AIA Foundation Model for Industrial Physics Simulation
Workers IOF26 · AISimulation Environments for Verifying Mission Critical Software
Aerogen SystemsS26 · OtherModernizing Chip Manufacturing Infrastructure
Akon LabsS26 · AIDatabricks for Enterprise Codebases
Amorphic LabsS26 · AIOpenRouter for Agent Tools
AsyncS26 · AIAI agents that run small businesses
Billow AI LabsS26 · AIAI-native Accounting Firm that's killing Deloitte
CarSignalS26 · AIThe AI Operating System for Auto Shops.
COACHS26 · AIThe AI Coach for in person sales reps.
ConiferS26 · AILeast cost routing system to reduce 70%+ token spend
Context.devS26 · AIWe give AI agents realtime web context via API
DecaworkS26 · AITraining company-specific models that approve AI actions.
DialogusS26 · AIThe AI-native contact center
DockS26 · AIMultiplayer workspace for agents and humans
DreamS26 · AIUsing VLMs to Catch Damage
EdviroS26 · AIAI That Operates Energy Infrastructure
FamiliarS26 · AIMovies in Every Language. Better than Humans.
GitCafeS26 · AIThe Git forge for the next hundred billion commits
GlenS26 · AIInstitutional Learning Layer for Every Agent in Your Company
HERAS26 · OtherWe make sure every factory in the world builds without mistakes.
HubbleS26 · AIAI-native retrieval engine for medical records
KaraS26 · OtherMaking Diamond Semiconductors
KebraS26 · AIAI For The Skilled Workforce
Lamb LabsS26 · AILightning fast chips with hardcoded AI models
LATOS26 · AIPredict how market participants behave
Levocred AIS26 · AIThe Bloomberg of Loans
Luca IQS26 · AIAPI-first tax engine for CPA firms and developers
MaingenS26 · AISimulating Agents Running Industrial Companies
MarkerS26 · AIPlatform + FDEs that rebuild enterprises agent-first
NebuSecS26 · AIAutonomous AI defense system for cyber attack
NeuromorphicS26 · AIBuilding robots to automate wetlabs
OneCLIS26 · AIThe open source AI teammates for your company.
OpenTagS26 · AIModel Agnostic AI coworker in Slack
OS3S26 · AIAffordable, intelligent humanoid robots built to deploy at scale
OsseusS26 · AIThe frontier data platform for aligned health and biological AI
PalisadeS26 · AIAI that finds and fixes OS-level vulnerabilities across device fleets
Perceptron MLS26 · AIWe make law firms AI-native.
PetrarchS26 · DataInternal industrial company data for frontier labs
Poth LabsS26 · AIThe customer brain that connects data to explain customer behavior
Prescience, Inc.S26 · AISuperintelligent health insurance that keeps employees healthy
RadleyS26 · AIThe AI-native radiology practice
RationalS26 · AIFirst Zero-human Accounting Firm
RexS26 · AIAI-native BPO for enterprise order-to-cash
RisklyticsS26 · AIAI-Native Insurance for Frontier Tech
screenpipeS26 · AITurn your company's computer work into AI agents.
SidekickS26 · AIAI agent that manages manufacturing operations over text
StudioS26 · AIAccurately simulate market response at scale
Tarifflo Inc.S26 · AISupply chain compliance and cost savings
TenorS26 · AIInfrastructure for building and scaling AI-native service businesses.
TropeS26 · AIAI FDE that deploys custom AI agents into ERPs
VendoS26 · AILet your users build their own features on top of your product
WhitespaceS26 · AIAI Operating System for Wholesale Distribution
ZaplarS26 · AIAgentic Hotel Operating System
ZommaS26 · AIThe AI BPO for financial servies, run by computer-use agents
DreachX26 · Developer toolsstaffing firms with dreach grow revenue faster.
Enjamb LabsX26 · AIThe AI Workforce for Biopharma
ExpanseX26 · AIUnlock wasted GPU capacity.
HedgeX26 · AIAI-Native insurance company
InferaX26 · AIControl lab instruments with natural language.
Keyframe LabsX26 · AIBring AI to life with the world's best interactive avatars
KimptonX26 · AILive Evaluation Arenas for Financial Work
KorsoX26 · AIThe last assistant you'll need
Lab0X26 · AIAI FDEs to make your B2B SaaS Go Live in Days, not Months
RevnuX26 · AIThe growth infrastructure for the autonomous business
SupersetX26 · AIBuilding self-improving software
10x ScienceW26 · AIThe AI-native platform for next-generation protein characterization.
Agentic FabriqW26 · AIThe control plane for AI agents.
CaptainW26 · AISelf-tuning file search for AI agents
Carrot LabsW26 · AIAI Cost Management: Track and attribute AI spend across every provider
CorelayerW26 · AIAI production engineer for regulated industries
CorveraW26 · AIThe AI sales engine for CPG brands
o11W26 · AIThe AI Data Warehouse For Financial Firms
Q2QW26 · InactiveWe help private equity teams find acquisition targets faster
Ressl AIW26 · AITrain, eval and build autonomous agents
SalusW26 · AIGuardrails to validate your agent's actions before they execute
VeriadW26 · AIAI operating system for advertising
AlderF25 · AIAI employees for finance, starting with accounts receivable.
AmikaF25 · AIInfra to build your own software factory
Automax.aiF25 · AIAI native real-estate appraisal firm
BlumaF25 · AICanva for short-form video ads
Bolna AIF25 · AIVoice AI to enable India's next billion
Boom AIF25 · AIAI agents that recover lost revenue through real conversations.
BraviF25 · AIAI operating system for home improvement manufacturers
CoastsF25 · InactiveLocalhost service isolation and orchestration for git worktrees
ComplyDoF25 · AIGlobal Compliance for Enterprises
dari.devF25 · AIThe Routing Layer for AI Agents
EverestF25 · Other
HelonicF25 · AIAutomatic Construction Drawing Clash Detection
Imagine AIF25 · AIWe reverse engineer B2B growth, starting with LinkedIn.
itemF25 · AIThe AI-Native CRM that works for you
LapisF25 · AIAI that creates and runs ads, end-end
LeadbayF25 · AIQualified leads for agentic workflows.
LexiF25 · AIAI Operating System for Legal Teams
LogicalF25 · AIA proactive desktop copilot. Clippy, but actually good.
LogosGuardF25 · AIThe sensitive data redaction layer for AI
MinroF25 · Developer toolsIdentify churn risk and stay close to users at scale
MSPilotF25 · AITurn AI adoption into a recurring revenue line.
OpenrollF25 · AIThe AI workforce for People and Finance teams
Patent WatchF25 · AIAI for detecting patent infringements
RedaptoF25 · AIIntelligence that moves the world
RovrF25 · InactiveAI FDE Engine that runs your engineering workflows
ScoopF25 · AIAutomating regulatory submissions for life sciences
SorenF25 · AIThe AI workforce for business operations.
Specific LabsF25 · AIReal World Environments and Data for AI
SylvianF25 · InactiveSpecialized AI Agents.
The Context CompanyF25 · AIFind what's losing you customers and money in your AI agent and fix it
TreliumF25 · AIThe Agent to Build Your Agents
Unsiloed AIF25 · AIAPI for parsing multimodal unstructured data
UplaneF25 · AIReplace marketing agencies with AI
ZavoF25 · AIUnlocking the world’s most valuable data for frontier AI.
argsS25 · Developer toolsA better GItHub
AutosanaS25 · AIAI agents for E2E testing across mobile & web
Certus AIS25 · AIReplacing the restaurant phone line with Voice AI
CLODOS25 · AIPlanet-scale people discovery.
CloseraS25 · AIAI Shopping Agent for Your Ecommerce Store
EmbedderS25 · AIThe Enterprise AI Platform for Embedded Software
F4 IndustriesS25 · AIThe GD&T Analysis Platform for Engineering Drawings
FintoS25 · AIAI accounting for enterprise finance teams
FrizzleS25 · AIAI Grading for Teachers
GETASAPS25 · AIAI-Native Fresh Produce Logistics
GhostEyeS25 · AIYour always-on red team.
LanesurfS25 · AIBook any load in 10 minutes
LarkS25 · AIThe E2E testing layer for AI-driven development
Liva AIS25 · AIBuilding socially intelligent AI
ManufactS25 · AICloud infrastructure for MCP servers and Claude / ChatGPT plugins.
MonarchaS25 · AITurn maps into data
MonteS25 · AIContinual Learning for Agents
MotivesS25 · AIConsumer focus groups run by AI
MunifyS25 · OtherThe Cross-Border Neobank for the Middle East
OnDeck AIS25 · AIAnalyze any footage, without training a model
PallyS25 · AIYour personal AI Assistant
PanoptiveS25 · AIThe continuous oversight engine for clinical trials
Physical TuringS25 · AIEvaluating humanoids in the real world
ProcIndexS25 · AIAI-powered accounting automation for construction and manufacturing
ProliferateS25 · AIDo your life's work with agents
ReacherS25 · AIWe automate creator marketing for the world's largest brands
RowFlowS25 · AIReplacing forms with AI conversations
SigmanticAIS25 · AIThe Cursor for Chip Design - Delivering Silicon-Ready Chip Designs…
StocklineS25 · AIAI-native ERP for food wholesalers
StormyS25 · AIStormy runs the office so your crew can run the work.
TraceS25 · AIContext-aware orchestration between humans and AI.
truthsystemsS25 · AIAutomatically blocking risky behavior with real-time governance agents
VibeFlowS25 · AIAI content manager that grows your company's online presence
AdentrisX25 · AIReal-time AI Compliance & Revenue Integrity for Medical Providers
AlkaliX25 · AIThe smarter way to estimate steel.
AnanaX25 · AIAI Workspace for Hospitality Commercial Teams
BitBoardX25 · AILet your agent build dashboards and reporting.
BlueshoeX25 · AIThe AI-Native Consumer + Plaintiff Law Firm
BondX25 · AIYour AI Chief of Staff
CactusX25 · AIAll-In-One AI Growth Partner. Built for Trades.
ClideyX25 · AITurn scattered data into one platform for decision-making
CohesiveX25 · AIThe agentic CRM for blue-collar services
DocketX25 · AIAI agents for web testing
Eloquent AIX25 · AIThe AI Operator for Financial Services
FreesoloX25 · AIProduct Native Models
FrekilX25 · AIRWE Generation in minutes
HABITX25 · AIAccelerating world models.
IRBCX25 · AIAI-native financial institution for global businesses + agents.
LumariX25 · AIAI Digital Workers for Supply Chain
MorphikX25 · AIAI workers for Skilled Nursing and Senior Living Operations
PelicaX25 · AIAI agents for risk-bearing healthcare organizations
PhotoniumX25 · AIAI-Powered Optical Consulting & Software
ProboX25 · OtherWe help you get compliant while you focus on your business.
QualGentX25 · AIAI Mobile App Quality Assurance Tester
SixtyfourX25 · AIIntelligence Infrastructure on People and Entities
StarSlingX25 · AISelf-Driving CI: fast AI-native GitHub Actions runners
stratifyX25 · AIAI agents that help you understand your customers' needs
ThetaX25 · AISpecialized AI for Every Job
throxyX25 · AIVertical AI agents running B2B outbound on autopilot, with human SDRs
VesenceX25 · AIAI for High-Stakes Work
.WaveW25 · AIContinuous inference for streaming AI models
AfterQueryW25 · AIApplied research lab curating data solutions for foundation model…
Artificial SocietiesW25 · AIFoundational model of human societies for consequential decisions
AsteroidW25 · AIThe integration layer for healthcare: EHRs, payer portals & more
BluebookW25 · AIAI for accounting
BystreetW25 · OtherYour partner for hotel ownership data.
CalltreeW25 · AIEnterprise-grade AI support reps for call centers
Caseflood.aiW25 · AIHow elite law firms do intake
CenoteW25 · AIAI agents for conversational commerce
CorsairW25 · AIOpenRouter for Integrations
Cuckoo LabsW25 · AIReal-time AI translator for global sales and marketing
Elip AIW25 · AICooking something sweet and salty!
ErgoW25 · AIAI agents and unified data layer for revenue teams
G LNKW25 · AISimplifying Collaboration for Healthcare Organizations & Professionals
GaleW25 · AIFast and Data-Driven Immigration Platform
InfiniteW25 · Developer toolsGlobal B2B Stablecoin Processor
Leaping AIW25 · AIAI voice and texting agents
LopusW25 · AIHeadless Data Team
NitrodeW25 · AIFrontier AI research to advance game development
OpenIntakeW25 · AIThe AI Front Door For Law Firms
OutlitW25 · AIProtect and Grow Long-tail Revenue
OutshipW25 · AIHire amazing engineers by seeing how they use AI
PraximW25 · AIThe agentic AI Word editor
PromptlessW25 · AIAn AI teammate that automatically updates your customer-facing docs
QuantstructW25 · AIAI documentation engineer – test & autoimprove stale product docs
RivieraW25 · AIAI Employees for Hotels
SalesPatriotW25 · AIAI powered operating system for distributors and OEMs
Sennu AIW25 · AIWe turn traditional companies into AI companies
SpottW25 · AIAI-native ATS/CRM for recruiting firms
TrataW25 · AIAI-powered research desk for hedge funds
TravaW25 · AIAI agents for global trade compliance
VetnioW25 · AIAI Copilot that automates admin work for veterinary professionals
WeaveW25 · AIAI to understand and then route engineering work
ArchiLabsF24 · AIAI Data Center Design
AutoComputerF24 · AIDesktop RPA with AI computer use
CekuraF24 · AIVoice AI and Chat AI agents: Testing and Observability
CTGTF24 · AIThe deterministic layer for frontier intelligence
DexterF24 · AISpend Intelligence for Complex Enterprises
GaliniF24 · AICompliance guardrails-as-a-service for AI applications
Gecko SecurityF24 · AIThe AI Security Engineer to Find and Fix Vulnerabilities
LaminarF24 · AIEnterprise systems delivery without the turbulence.
Lingo.devF24 · AIThe Localization Engineering Platform
LuthorF24 · AIReal-time governance for enterprise communications
OpenbenchmarksF24 · AIWe help humans & agents pick tools via Independent Benchmarks
Relvy AIF24 · AIAI powered debugging notebooks for incident response
RevylF24 · AIThe Mobile Development Platform
RiveterF24 · AITurn the web into structured data
StructF24 · AIStruct keeps prod running
SymphonyF24 · AIVoice AI sims for next-gen employee training
TinyF24 · AIA new kind of ERP system for factories
VespperF24 · AIThe best DOCX MCP for agents to edit microsoft word documents
&AIS24 · AICollaborative workspace for patent litigators
Affil.aiS24 · AIAI Affiliate Network For Financial Companies
AnaraS24 · AIAI for researchers
AngleraS24 · AIAI-Powered Product Data EnrichmentNot affiliated with Y Combinator. From YC's public directory. Logos via logo.dev; trademarks belong to their owners.