Cohorts of 2021

Companies whose accelerator cohort started in 2021. 1,685 companies.

CompanyClusterProgramStatusLast signal
Replo

Sell anything

B2B SaaSAI-powered commerce GTM platformY CombinatorS21Activechecked 2026-08-23
Repool

Modernizing hedge fund back office software and services.

B2B SaaShedge fund back office softwareY CombinatorS21Activechecked 2026-08-23
REPROSENT

Activating an overlooked force in medicine - the patient.

Healthcare and biopatient engagement and data captureY CombinatorS21Activechecked 2026-08-23
Revery AIAI

Tiktok for fashion - where designers show their work + build traction

Consumercreator economy fashion platformY CombinatorS21Inactivechecked 2026-08-17
Revolve Surgical

Surgical robotics for every operating room

Robotics and physical worldSurgical robotics for abdominal proceduresY CombinatorS21Activechecked 2026-08-23
RGI LabsAI

Robust & recursively self-improving general intelligence

Vertical AI agentsAI coding accuracy for healthcare risk adjustmentY CombinatorS21Activechecked 2026-08-23
Rinse

We're building the One Medical for dental

Healthcare and bioDirect-to-consumer dental careY CombinatorS21Activechecked 2026-08-23
Rivia.AI

Interactive Product Demos

B2B SaaSInteractive product demo platformY CombinatorS21Activechecked 2026-08-23
RMFG

Advanced Contract MFG for fast moving hardware companies

Robotics and physical worldAI-powered precision contract manufacturingY CombinatorS21Activechecked 2026-08-23
RootlyAI

AI-native on-call and incident response carefully crafted to help…

B2B SaaSAI-native incident management platformY CombinatorS21Activechecked 2026-08-23
Ruta Health

Async personalized and actionable health education by real doctors

Healthcare and bioPersonalized health education platformY CombinatorS21Inactivechecked 2026-08-17
Ruth Health

Telehealth hub for pregnant people 🧡

Healthcare and biopostpartum pelvic floor telehealthY CombinatorS21Inactivechecked 2026-08-17
SafeBeat

Guiding cardiac therapeutics - all from your phone

Healthcare and biocardiac therapeutics mobile platformY CombinatorS21Activechecked 2026-08-23
Safer Management

Student Attendance tracking for Public Schools

B2B SaaSattendance tracking for schoolsY CombinatorS21Site unreachablechecked 2026-08-17
SalaryBook

Mobile first solution for Payroll, employee & expense management

B2B SaaSPayroll and HR management for Indian SMEsY CombinatorS21Activechecked 2026-08-23
SalaryBox

Gusto for India

B2B SaaSPayroll software for Indian SMBsY CombinatorS21Activechecked 2026-08-23
Satsuma

Reliable blockchain indexing & querying for web3 engineering teams.

Developer toolsblockchain data indexing APIY CombinatorS21Acquiredchecked 2026-08-17
Scispot

The Best Data Infrastructure for Biotechs

Data for AIBiotech data infrastructure and workflowsY CombinatorS21Active, new domain2026-08-23
Scratch Data

Analytics for builders. Record and query billions of datapoints with…

Developer toolsAnalytics database infrastructure for developersY CombinatorS21Inactivechecked 2026-08-17
SecodaAI

Secoda is the AI layer for your Analytics

Data for AIAI-powered data discovery and governanceY CombinatorS21Activechecked 2026-08-23
SenpAI.GGAI

Personal gaming coach for PC gamers globally

ConsumerAI gaming coach for PC gamersY CombinatorS21Inactivechecked 2026-08-17
Sensible Biotechnologies

Unlocking the next generation of mRNA medicines

Healthcare and biomRNA manufacturing biotechnologyY CombinatorS21Activechecked 2026-08-23
SentiyenAI

Conversational AI assistants using your knowledge

Horizontal AI assistantsconversational AI for customer engagementY CombinatorS21Inactivechecked 2026-08-17
SequinAI

Sequin is building AI Voice Agents to automate collections calls for…

Vertical AI agentsAI voice agents for collectionsY CombinatorS21Activechecked 2026-08-23
SFA Therapeutics

Regulating the immune system to block cancer & autoimmune diseases

Healthcare and bioimmunoregulation therapeutics for autoimmune and cancerY CombinatorS21Activechecked 2026-08-24
ShapeAI

Get data insights without writing SQL

Developer toolsAI-powered analytics query toolY CombinatorS21Active2026-08-19
Shimmer

1:1 ADHD coaching, 5-10X More affordable than alternatives

Healthcare and bioADHD coaching and executive function supportY CombinatorS21Activechecked 2026-08-23
ShipBlu

Amazon Level Logistics for eCommerce Companies in MENA.

Commerce and marketplacesLogistics infrastructure for eCommerce MENAY CombinatorS21Activechecked 2026-08-23
Siglo

Home Internet for urban Latin America

Consumerwireless ISP for Latin AmericaY CombinatorS21Activechecked 2026-08-23
SigmaOS

The new home for your internet 🏡

Developer toolsAI-powered productivity browserY CombinatorS21Activechecked 2026-08-23
Sirka

Noom for Southeast Asia

Healthcare and biochronic disease prevention through nutritionY CombinatorS21Active, new domain2026-08-23
Sitenna

Compound B2B SaaS for modern infrastructure to deploy and manage sites

B2B SaaSInfrastructure site management softwareY CombinatorS21Activechecked 2026-08-23
Slash

Banking, corporate cards, stablecoin payments – available globally.

FintechBusiness banking and paymentsY CombinatorS21Activechecked 2026-08-23
SleekAI

Browser automation for businesses.

Vertical AI agentsAI agents for ecommerce automationY CombinatorS21Acquiredchecked 2026-08-23
Slope

The B2B Payments Platform

FintechB2B payments reconciliationY CombinatorS21Activechecked 2026-08-23
SnapCalorieAI

Single photo nutrition tracking.

ConsumerAI nutrition tracking appY CombinatorS21Activechecked 2026-08-23
SocoAI

Visual AI shopping

ConsumerVisual AI shopping assistantY CombinatorS21Activechecked 2026-08-17
SolarMente

Home electrification at $0 upfront cost

Climate and energyresidential solar financingY CombinatorS21Inactivechecked 2026-08-17
Spark StudioAI

The most magical personal Voice-Led AI English Learning Buddy for Kids

ConsumerAI English learning for kidsY CombinatorS21Activechecked 2026-08-23
Spoken

Never overpay online

Commerce and marketplacesprice comparison marketplaceY CombinatorS21Inactivechecked 2026-08-17
Sproutfi

Latin Americas' first investing social network. Learn. Share. Invest.

FintechSocial investing platform for Latin AmericaY CombinatorS21Acquired-
Squire.aiAI

Never code alone.

Developer toolsAI code review and PR automationY CombinatorS21Inactivechecked 2026-08-23
StardexAI

AI native ATS + CRM for executive search firms

Vertical AI agentsAI recruiting and executive searchY CombinatorS21Activechecked 2026-08-23
Stepful

Online Training for Healthcare Jobs

Healthcare and bioHealthcare workforce training platformY CombinatorS21Activechecked 2026-08-23
Stipop

Monetization platform for character creators

Consumercreator monetization platformY CombinatorS21Activechecked 2026-08-23
Storylane

Build Interactive Product Demo in 10 mins for SaaS companies

B2B SaaSInteractive demo platform for SaaSY CombinatorS21Site unreachablechecked 2026-08-23
Stownest

Flexible On-Demand Storage Space for Household, SMEs & Travellers.

Consumeron-demand self-storage marketplaceY CombinatorS21Activechecked 2026-08-23
StrideQAI

Automated phone ordering system for restaurants

Vertical AI agentsAI phone ordering for restaurantsY CombinatorS21Activechecked 2026-08-23
Strive Math

Online Coding School for Kids 8-16

Consumeronline education platform for kidsY CombinatorS21Activechecked 2026-08-23
StudyStream

24/7 video platform & online community for students to study together

Consumerstudent study community platformY CombinatorS21Activechecked 2026-08-23
Styched

Affordable D2C youth fashion brand

ConsumerD2C youth fashion retailSOSVSOSV Orbit Startups - MOX 12Activechecked 2026-08-23
Sully.aiAI

Autonomous team of AI agents that runs the entire hospital operations

Vertical AI agentsHospital operations autonomous agentsY CombinatorS21Activechecked 2026-08-23
Superwall

Subscription infrastructure & paywall experimentation for mobile apps

Commerce and marketplacessubscription infrastructure and paywall managementY CombinatorS21Activechecked 2026-08-23
Suplias

We enable FMCG distributors in Africa buy inventory on credit

FintechFMCG supply chain financingY CombinatorS21Activechecked 2026-08-23
Swipe

Super AI Accountant for SMBs

FintechAI billing and payments for SMBsY CombinatorS21Activechecked 2026-08-23
Synder

Easy accounting for e-commerce

B2B SaaSAccounting automation for e-commerceY CombinatorS21Activechecked 2026-08-23
Tablevibe

Direct Ordering Software for Restaurants

Commerce and marketplacesDirect ordering for restaurantsY CombinatorS21Acquiredchecked 2026-08-23
TAG

TAG is the First Digital Bank (Chime/Revolut/N26) for Pakistan

Fintechdigital banking for emerging marketsY CombinatorS21Activechecked 2026-08-23
Talentdrop

Your personal hiring page.

B2B SaaSPersonal hiring pages and referral networksY CombinatorS21Inactivechecked 2026-08-17
Talus Bio

Discovering drugs that target the DNA regulome

Healthcare and bioDNA regulome drug discoveryY CombinatorS21Activechecked 2026-08-23
Tarsal

Data pipeline for your security data lake.

Security and complianceSecurity data pipeline infrastructureY CombinatorS21Acquired2026-08-23
TavusAI

Building the human layer of AI

Agent infrastructureHuman avatar and conversational AI infrastructureY CombinatorS21Activechecked 2026-08-23
TelivyAI

Automate your cyber security risk assessments

Security and complianceAI cyber risk assessment platformY CombinatorS21Acquired2026-08-23
Telmai

Automated data observability and quality for Data Lake

Data for AIdata quality and observability platformY CombinatorS21Activechecked 2026-08-23
TenyksAI

The World's Most Versatile Video Answering Engine

Vertical AI agentsvisual intelligence platform for operationsY CombinatorS21Activechecked 2026-08-23
TesaraktAI

Reinventing Brain Care Through AI

Healthcare and bioAI-powered brain care platformSOSVSOSV IndieBio NY 04Activechecked 2026-08-23
testRigor

Executable specifications in English for test automation

Developer toolstest automation in EnglishY CombinatorS21Activechecked 2026-08-23
The BreakawayAI

The personal coach and companion for cyclists.

ConsumerAI fitness coaching for cyclistsY CombinatorS21Site unreachablechecked 2026-08-17
Therify

Inclusive mental healthcare for companies

Healthcare and biomental health benefits for employeesY CombinatorS21Activechecked 2026-08-23
TippingPoint Biosciences

First ever therapeutics for cancers driven by aberrant chromatin networks

Healthcare and bioCancer therapeutics via chromatin networksSOSVSOSV IndieBio SF 14Active2026-04-01
Tiriel AIAI

The AI workforce for freight dispatch

Vertical AI agentsAI freight dispatch workforceY CombinatorS21Activechecked 2026-08-23
Titipku

Super Hyperlocal Marketplace for SMEs in Indonesia

Commerce and marketplaceshyperlocal grocery marketplace for SMEsY CombinatorS21Activechecked 2026-08-23
Toku

Account Receivables Platform for Latin American Enterprises

Fintechaccounts receivable automationY CombinatorS21Activechecked 2026-08-23
TransAstra Corporation

Orbital logistics: Unleashing space industry, from Earth to asteroids

Defense and spaceorbital logistics and propulsionY CombinatorS21Activechecked 2026-08-23
Treepz

Car lending platform in West Africa

Fintechcar lending West AfricaSOSVSOSV Orbit Startups - MOX 12Activechecked 2026-08-23
trii

One stop investment solution for retail investors in Latam

Fintechretail investment platform for LatamY CombinatorS21Activechecked 2026-08-23
Truss

Banking for construction

FintechConstruction banking and paymentsY CombinatorS21Activechecked 2026-08-23
Tuli Health

Transforming pharmacies in the UK into diagnostic centers

Healthcare and biopharmacy diagnostic fulfillment softwareY CombinatorS21Activechecked 2026-08-23
Turion Space

Moving Things Around in Space, Imaging Space Objects When We're Not

Defense and spacespace domain awareness and orbital servicesY CombinatorS21Activechecked 2026-08-23
Union54

Developers of ChitChat, an integrated messaging and payments wallet…

Fintechmessaging-integrated payments wallet AfricaY CombinatorS21Activechecked 2026-08-23
V-Flow Medical

Transforming the lives of millions of women suffering from chronic…

Healthcare and bioMedical devices for chronic pelvic painY CombinatorS21Inactivechecked 2026-08-17
VarosAI

AI Business Analysts to gather requirements and optimize processes

Vertical AI agentsAI business analysts for process discoveryY CombinatorS21Activechecked 2026-08-23
VedaBio

CRISPR powered Diagnostics with results in minutes.

Healthcare and bioCRISPR-based rapid diagnosticsY CombinatorS21Activechecked 2026-08-23
Verano Health

Nonprofit telehealth coaches for underserved Americans on Medicaid

Healthcare and bioMedicaid telehealth coaching for chronic diseaseY CombinatorS21Acquiredchecked 2026-08-17
Verde

Digital lending platform for Brazilian farmers

FintechAgricultural lending for SMB farmersY CombinatorS21Inactivechecked 2026-08-17
VerihubsAI

AI-powered Deepfake Detection

Security and complianceAI deepfake detection and face verificationY CombinatorS21Activechecked 2026-08-23
VIA Fuels

A shortcut to jet fuel -- scalable today.

Climate and energysustainable aviation fuel productionSOSVSOSV IndieBio SF 14Activechecked 2026-08-23
ViAn Therapeutics

Topical antiangiogenic peptide for retinal vascular diseases

Healthcare and bioRetinal vascular disease therapeuticsSOSVSOSV IndieBio SF 14Activechecked 2026-08-23
Vibe Kanban

Plan and review AI generated code

Developer toolsAI code review and planningY CombinatorS21Activechecked 2026-08-23
Vinco

Retaining employees in LatAm via education

B2B SaaSEmployee education and retention SaaSY CombinatorS21Activechecked 2026-08-23
VogentAI

Build Voice AI Agents

Agent infrastructureVoice agent orchestration platformY CombinatorS21Acquiredchecked 2026-08-23
Wabi

We are Shopify for the $15B creator economy in LATAM

Commerce and marketplacesCreator economy marketplace platformY CombinatorS21Inactivechecked 2026-08-17
WarpBuild

Accelerate software development with WarpBuild's 10x faster CI infra.

Developer toolsCI/CD infrastructure accelerationY CombinatorS21Activechecked 2026-08-23
Warpfy

Building Shein of Home: tech-driven, design-mfr Home Lifestyle Brand

Commerce and marketplaceshome goods direct-to-consumer marketplaceY CombinatorS21Activechecked 2026-08-23
Warrant

Authorization and access control as a service.

Developer toolsauthorization infrastructure platformY CombinatorS21Acquiredchecked 2026-08-23
Waterplan

Water risk mitigation for industrial sites

Climate and energyWater risk assessment for industryY CombinatorS21Activechecked 2026-08-23
Whalesync

Manage your website from your favorite tools like Airtable and Notion

B2B SaaSWebsite data syncing and automationY CombinatorS21Activechecked 2026-08-23
Whaly

Whaly is building a self-service analytics platform

Data for AIself-service analytics platformY CombinatorS21Activechecked 2026-08-23
WiJungle

Unified cybersecurity solutions for businesses

Security and complianceunified cybersecurity platformSOSVSOSV Orbit Startups - MOX 12Activechecked 2026-08-23
WritesonicAI

Track & Boost Your Brand’s Visibility in AI Search

B2B SaaSAI search visibility and optimization platformY CombinatorS21Activechecked 2026-08-23