Cohorts of 2021
Companies whose accelerator cohort started in 2021. 1,685 companies.
| Company | Cluster | Program | Status | Last signal |
|---|---|---|---|---|
| Replo Sell anything | B2B SaaSAI-powered commerce GTM platform | Y CombinatorS21 | Active | checked 2026-08-23 |
| Repool Modernizing hedge fund back office software and services. | B2B SaaShedge fund back office software | Y CombinatorS21 | Active | checked 2026-08-23 |
| REPROSENT Activating an overlooked force in medicine - the patient. | Healthcare and biopatient engagement and data capture | Y CombinatorS21 | Active | checked 2026-08-23 |
| Revery AIAI Tiktok for fashion - where designers show their work + build traction | Consumercreator economy fashion platform | Y CombinatorS21 | Inactive | checked 2026-08-17 |
| Revolve Surgical Surgical robotics for every operating room | Robotics and physical worldSurgical robotics for abdominal procedures | Y CombinatorS21 | Active | checked 2026-08-23 |
| RGI LabsAI Robust & recursively self-improving general intelligence | Vertical AI agentsAI coding accuracy for healthcare risk adjustment | Y CombinatorS21 | Active | checked 2026-08-23 |
| Rinse We're building the One Medical for dental | Healthcare and bioDirect-to-consumer dental care | Y CombinatorS21 | Active | checked 2026-08-23 |
| Rivia.AI Interactive Product Demos | B2B SaaSInteractive product demo platform | Y CombinatorS21 | Active | checked 2026-08-23 |
| RMFG Advanced Contract MFG for fast moving hardware companies | Robotics and physical worldAI-powered precision contract manufacturing | Y CombinatorS21 | Active | checked 2026-08-23 |
| RootlyAI AI-native on-call and incident response carefully crafted to help… | B2B SaaSAI-native incident management platform | Y CombinatorS21 | Active | checked 2026-08-23 |
| Ruta Health Async personalized and actionable health education by real doctors | Healthcare and bioPersonalized health education platform | Y CombinatorS21 | Inactive | checked 2026-08-17 |
| Ruth Health Telehealth hub for pregnant people 🧡 | Healthcare and biopostpartum pelvic floor telehealth | Y CombinatorS21 | Inactive | checked 2026-08-17 |
| SafeBeat Guiding cardiac therapeutics - all from your phone | Healthcare and biocardiac therapeutics mobile platform | Y CombinatorS21 | Active | checked 2026-08-23 |
| Safer Management Student Attendance tracking for Public Schools | B2B SaaSattendance tracking for schools | Y CombinatorS21 | Site unreachable | checked 2026-08-17 |
| SalaryBook Mobile first solution for Payroll, employee & expense management | B2B SaaSPayroll and HR management for Indian SMEs | Y CombinatorS21 | Active | checked 2026-08-23 |
| SalaryBox Gusto for India | B2B SaaSPayroll software for Indian SMBs | Y CombinatorS21 | Active | checked 2026-08-23 |
| Satsuma Reliable blockchain indexing & querying for web3 engineering teams. | Developer toolsblockchain data indexing API | Y CombinatorS21 | Acquired | checked 2026-08-17 |
| Scispot The Best Data Infrastructure for Biotechs | Data for AIBiotech data infrastructure and workflows | Y CombinatorS21 | Active, new domain | 2026-08-23 |
| Scratch Data Analytics for builders. Record and query billions of datapoints with… | Developer toolsAnalytics database infrastructure for developers | Y CombinatorS21 | Inactive | checked 2026-08-17 |
| SecodaAI Secoda is the AI layer for your Analytics | Data for AIAI-powered data discovery and governance | Y CombinatorS21 | Active | checked 2026-08-23 |
| SenpAI.GGAI Personal gaming coach for PC gamers globally | ConsumerAI gaming coach for PC gamers | Y CombinatorS21 | Inactive | checked 2026-08-17 |
| Sensible Biotechnologies Unlocking the next generation of mRNA medicines | Healthcare and biomRNA manufacturing biotechnology | Y CombinatorS21 | Active | checked 2026-08-23 |
| SentiyenAI Conversational AI assistants using your knowledge | Horizontal AI assistantsconversational AI for customer engagement | Y CombinatorS21 | Inactive | checked 2026-08-17 |
| SequinAI Sequin is building AI Voice Agents to automate collections calls for… | Vertical AI agentsAI voice agents for collections | Y CombinatorS21 | Active | checked 2026-08-23 |
| SFA Therapeutics Regulating the immune system to block cancer & autoimmune diseases | Healthcare and bioimmunoregulation therapeutics for autoimmune and cancer | Y CombinatorS21 | Active | checked 2026-08-24 |
| ShapeAI Get data insights without writing SQL | Developer toolsAI-powered analytics query tool | Y CombinatorS21 | Active | 2026-08-19 |
| Shimmer 1:1 ADHD coaching, 5-10X More affordable than alternatives | Healthcare and bioADHD coaching and executive function support | Y CombinatorS21 | Active | checked 2026-08-23 |
| ShipBlu Amazon Level Logistics for eCommerce Companies in MENA. | Commerce and marketplacesLogistics infrastructure for eCommerce MENA | Y CombinatorS21 | Active | checked 2026-08-23 |
| Siglo Home Internet for urban Latin America | Consumerwireless ISP for Latin America | Y CombinatorS21 | Active | checked 2026-08-23 |
| SigmaOS The new home for your internet 🏡 | Developer toolsAI-powered productivity browser | Y CombinatorS21 | Active | checked 2026-08-23 |
| Sirka Noom for Southeast Asia | Healthcare and biochronic disease prevention through nutrition | Y CombinatorS21 | Active, new domain | 2026-08-23 |
| Sitenna Compound B2B SaaS for modern infrastructure to deploy and manage sites | B2B SaaSInfrastructure site management software | Y CombinatorS21 | Active | checked 2026-08-23 |
| Slash Banking, corporate cards, stablecoin payments – available globally. | FintechBusiness banking and payments | Y CombinatorS21 | Active | checked 2026-08-23 |
| SleekAI Browser automation for businesses. | Vertical AI agentsAI agents for ecommerce automation | Y CombinatorS21 | Acquired | checked 2026-08-23 |
| Slope The B2B Payments Platform | FintechB2B payments reconciliation | Y CombinatorS21 | Active | checked 2026-08-23 |
| SnapCalorieAI Single photo nutrition tracking. | ConsumerAI nutrition tracking app | Y CombinatorS21 | Active | checked 2026-08-23 |
| SocoAI Visual AI shopping | ConsumerVisual AI shopping assistant | Y CombinatorS21 | Active | checked 2026-08-17 |
| SolarMente Home electrification at $0 upfront cost | Climate and energyresidential solar financing | Y CombinatorS21 | Inactive | checked 2026-08-17 |
| Spark StudioAI The most magical personal Voice-Led AI English Learning Buddy for Kids | ConsumerAI English learning for kids | Y CombinatorS21 | Active | checked 2026-08-23 |
| Spoken Never overpay online | Commerce and marketplacesprice comparison marketplace | Y CombinatorS21 | Inactive | checked 2026-08-17 |
| Sproutfi Latin Americas' first investing social network. Learn. Share. Invest. | FintechSocial investing platform for Latin America | Y CombinatorS21 | Acquired | - |
| Squire.aiAI Never code alone. | Developer toolsAI code review and PR automation | Y CombinatorS21 | Inactive | checked 2026-08-23 |
| StardexAI AI native ATS + CRM for executive search firms | Vertical AI agentsAI recruiting and executive search | Y CombinatorS21 | Active | checked 2026-08-23 |
| Stepful Online Training for Healthcare Jobs | Healthcare and bioHealthcare workforce training platform | Y CombinatorS21 | Active | checked 2026-08-23 |
| Stipop Monetization platform for character creators | Consumercreator monetization platform | Y CombinatorS21 | Active | checked 2026-08-23 |
| Storylane Build Interactive Product Demo in 10 mins for SaaS companies | B2B SaaSInteractive demo platform for SaaS | Y CombinatorS21 | Site unreachable | checked 2026-08-23 |
| Stownest Flexible On-Demand Storage Space for Household, SMEs & Travellers. | Consumeron-demand self-storage marketplace | Y CombinatorS21 | Active | checked 2026-08-23 |
| StrideQAI Automated phone ordering system for restaurants | Vertical AI agentsAI phone ordering for restaurants | Y CombinatorS21 | Active | checked 2026-08-23 |
| Strive Math Online Coding School for Kids 8-16 | Consumeronline education platform for kids | Y CombinatorS21 | Active | checked 2026-08-23 |
| StudyStream 24/7 video platform & online community for students to study together | Consumerstudent study community platform | Y CombinatorS21 | Active | checked 2026-08-23 |
| Styched Affordable D2C youth fashion brand | ConsumerD2C youth fashion retail | SOSVSOSV Orbit Startups - MOX 12 | Active | checked 2026-08-23 |
| Sully.aiAI Autonomous team of AI agents that runs the entire hospital operations | Vertical AI agentsHospital operations autonomous agents | Y CombinatorS21 | Active | checked 2026-08-23 |
| Superwall Subscription infrastructure & paywall experimentation for mobile apps | Commerce and marketplacessubscription infrastructure and paywall management | Y CombinatorS21 | Active | checked 2026-08-23 |
| Suplias We enable FMCG distributors in Africa buy inventory on credit | FintechFMCG supply chain financing | Y CombinatorS21 | Active | checked 2026-08-23 |
| Swipe Super AI Accountant for SMBs | FintechAI billing and payments for SMBs | Y CombinatorS21 | Active | checked 2026-08-23 |
| Synder Easy accounting for e-commerce | B2B SaaSAccounting automation for e-commerce | Y CombinatorS21 | Active | checked 2026-08-23 |
| Tablevibe Direct Ordering Software for Restaurants | Commerce and marketplacesDirect ordering for restaurants | Y CombinatorS21 | Acquired | checked 2026-08-23 |
| TAG TAG is the First Digital Bank (Chime/Revolut/N26) for Pakistan | Fintechdigital banking for emerging markets | Y CombinatorS21 | Active | checked 2026-08-23 |
| Talentdrop Your personal hiring page. | B2B SaaSPersonal hiring pages and referral networks | Y CombinatorS21 | Inactive | checked 2026-08-17 |
| Talus Bio Discovering drugs that target the DNA regulome | Healthcare and bioDNA regulome drug discovery | Y CombinatorS21 | Active | checked 2026-08-23 |
| Tarsal Data pipeline for your security data lake. | Security and complianceSecurity data pipeline infrastructure | Y CombinatorS21 | Acquired | 2026-08-23 |
| TavusAI Building the human layer of AI | Agent infrastructureHuman avatar and conversational AI infrastructure | Y CombinatorS21 | Active | checked 2026-08-23 |
| TelivyAI Automate your cyber security risk assessments | Security and complianceAI cyber risk assessment platform | Y CombinatorS21 | Acquired | 2026-08-23 |
| Telmai Automated data observability and quality for Data Lake | Data for AIdata quality and observability platform | Y CombinatorS21 | Active | checked 2026-08-23 |
| TenyksAI The World's Most Versatile Video Answering Engine | Vertical AI agentsvisual intelligence platform for operations | Y CombinatorS21 | Active | checked 2026-08-23 |
| TesaraktAI Reinventing Brain Care Through AI | Healthcare and bioAI-powered brain care platform | SOSVSOSV IndieBio NY 04 | Active | checked 2026-08-23 |
| testRigor Executable specifications in English for test automation | Developer toolstest automation in English | Y CombinatorS21 | Active | checked 2026-08-23 |
| The BreakawayAI The personal coach and companion for cyclists. | ConsumerAI fitness coaching for cyclists | Y CombinatorS21 | Site unreachable | checked 2026-08-17 |
| Therify Inclusive mental healthcare for companies | Healthcare and biomental health benefits for employees | Y CombinatorS21 | Active | checked 2026-08-23 |
| TippingPoint Biosciences First ever therapeutics for cancers driven by aberrant chromatin networks | Healthcare and bioCancer therapeutics via chromatin networks | SOSVSOSV IndieBio SF 14 | Active | 2026-04-01 |
| Tiriel AIAI The AI workforce for freight dispatch | Vertical AI agentsAI freight dispatch workforce | Y CombinatorS21 | Active | checked 2026-08-23 |
| Titipku Super Hyperlocal Marketplace for SMEs in Indonesia | Commerce and marketplaceshyperlocal grocery marketplace for SMEs | Y CombinatorS21 | Active | checked 2026-08-23 |
| Toku Account Receivables Platform for Latin American Enterprises | Fintechaccounts receivable automation | Y CombinatorS21 | Active | checked 2026-08-23 |
| TransAstra Corporation Orbital logistics: Unleashing space industry, from Earth to asteroids | Defense and spaceorbital logistics and propulsion | Y CombinatorS21 | Active | checked 2026-08-23 |
| Treepz Car lending platform in West Africa | Fintechcar lending West Africa | SOSVSOSV Orbit Startups - MOX 12 | Active | checked 2026-08-23 |
| trii One stop investment solution for retail investors in Latam | Fintechretail investment platform for Latam | Y CombinatorS21 | Active | checked 2026-08-23 |
| Truss Banking for construction | FintechConstruction banking and payments | Y CombinatorS21 | Active | checked 2026-08-23 |
| Tuli Health Transforming pharmacies in the UK into diagnostic centers | Healthcare and biopharmacy diagnostic fulfillment software | Y CombinatorS21 | Active | checked 2026-08-23 |
| Turion Space Moving Things Around in Space, Imaging Space Objects When We're Not | Defense and spacespace domain awareness and orbital services | Y CombinatorS21 | Active | checked 2026-08-23 |
| Union54 Developers of ChitChat, an integrated messaging and payments wallet… | Fintechmessaging-integrated payments wallet Africa | Y CombinatorS21 | Active | checked 2026-08-23 |
| V-Flow Medical Transforming the lives of millions of women suffering from chronic… | Healthcare and bioMedical devices for chronic pelvic pain | Y CombinatorS21 | Inactive | checked 2026-08-17 |
| VarosAI AI Business Analysts to gather requirements and optimize processes | Vertical AI agentsAI business analysts for process discovery | Y CombinatorS21 | Active | checked 2026-08-23 |
| VedaBio CRISPR powered Diagnostics with results in minutes. | Healthcare and bioCRISPR-based rapid diagnostics | Y CombinatorS21 | Active | checked 2026-08-23 |
| Verano Health Nonprofit telehealth coaches for underserved Americans on Medicaid | Healthcare and bioMedicaid telehealth coaching for chronic disease | Y CombinatorS21 | Acquired | checked 2026-08-17 |
| Verde Digital lending platform for Brazilian farmers | FintechAgricultural lending for SMB farmers | Y CombinatorS21 | Inactive | checked 2026-08-17 |
| VerihubsAI AI-powered Deepfake Detection | Security and complianceAI deepfake detection and face verification | Y CombinatorS21 | Active | checked 2026-08-23 |
| VIA Fuels A shortcut to jet fuel -- scalable today. | Climate and energysustainable aviation fuel production | SOSVSOSV IndieBio SF 14 | Active | checked 2026-08-23 |
| ViAn Therapeutics Topical antiangiogenic peptide for retinal vascular diseases | Healthcare and bioRetinal vascular disease therapeutics | SOSVSOSV IndieBio SF 14 | Active | checked 2026-08-23 |
| Vibe Kanban Plan and review AI generated code | Developer toolsAI code review and planning | Y CombinatorS21 | Active | checked 2026-08-23 |
| Vinco Retaining employees in LatAm via education | B2B SaaSEmployee education and retention SaaS | Y CombinatorS21 | Active | checked 2026-08-23 |
| VogentAI Build Voice AI Agents | Agent infrastructureVoice agent orchestration platform | Y CombinatorS21 | Acquired | checked 2026-08-23 |
| Wabi We are Shopify for the $15B creator economy in LATAM | Commerce and marketplacesCreator economy marketplace platform | Y CombinatorS21 | Inactive | checked 2026-08-17 |
| WarpBuild Accelerate software development with WarpBuild's 10x faster CI infra. | Developer toolsCI/CD infrastructure acceleration | Y CombinatorS21 | Active | checked 2026-08-23 |
| Warpfy Building Shein of Home: tech-driven, design-mfr Home Lifestyle Brand | Commerce and marketplaceshome goods direct-to-consumer marketplace | Y CombinatorS21 | Active | checked 2026-08-23 |
| Warrant Authorization and access control as a service. | Developer toolsauthorization infrastructure platform | Y CombinatorS21 | Acquired | checked 2026-08-23 |
| Waterplan Water risk mitigation for industrial sites | Climate and energyWater risk assessment for industry | Y CombinatorS21 | Active | checked 2026-08-23 |
| Whalesync Manage your website from your favorite tools like Airtable and Notion | B2B SaaSWebsite data syncing and automation | Y CombinatorS21 | Active | checked 2026-08-23 |
| Whaly Whaly is building a self-service analytics platform | Data for AIself-service analytics platform | Y CombinatorS21 | Active | checked 2026-08-23 |
| WiJungle Unified cybersecurity solutions for businesses | Security and complianceunified cybersecurity platform | SOSVSOSV Orbit Startups - MOX 12 | Active | checked 2026-08-23 |
| WritesonicAI Track & Boost Your Brand’s Visibility in AI Search | B2B SaaSAI search visibility and optimization platform | Y CombinatorS21 | Active | checked 2026-08-23 |