Cohorts of 2021

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

CompanyClusterProgramStatusLast signal
noHQ

International contractor and multi country payroll

FintechInternational payroll and entity setupY CombinatorW21Inactivechecked 2026-08-17
Nourish

Telehealth dietitians covered by insurance

Healthcare and bioTelehealth nutrition managementY CombinatorW21Activechecked 2026-08-23
Noya

Radically reducing capital costs and build time for direct air capture

Climate and energydirect air capture equipment retrofitY CombinatorW21Inactivechecked 2026-08-17
Nuntius Therapeutics

Cell-specific genetic medicines

Healthcare and bioCell-specific gene therapyY CombinatorW21Activechecked 2026-08-23
Observa

Catch accidental database exposures before the bad guys

Security and compliancedatabase exposure detectionY CombinatorW21Inactivechecked 2026-08-17
OctiFi

Buy Now Pay Later for Southeast Asia

FintechBuy now pay later for Southeast AsiaY CombinatorW21Acquiredchecked 2026-08-24
OlaClick

Restaurant Solution (E-commerce via WhatsApp + POS + CRM/Marketing)

Commerce and marketplacesrestaurant e-commerce and POSY CombinatorW21Activechecked 2026-08-23
OllamaAI

Get up and running with large language models.

AI infra and computeLocal LLM inference runtimeY CombinatorW21Activechecked 2026-08-23
Ontop

Simplifying hiring and payments for the global workforce

FintechGlobal payroll and worker financial accountsY CombinatorW21Activechecked 2026-08-23
OpenCodeAI

The open source AI coding agent

Developer toolsOpen source AI coding agentY CombinatorW21Activechecked 2026-08-23
Orbillion BioAI

Tasty and scalable cultivated meat at price parity

Robotics and physical worldcultivated meat bioprocessY CombinatorW21Acquiredchecked 2026-08-17
Outfit

DIY renovations in a box. Materials, tools, and instructions delivered

ConsumerDIY home renovation kitsY CombinatorW21Inactive2026-08-23
Pagaloop

Pay, Get Paid and Extend Cash Flow using your Credit Card as…

FintechCredit card payment financing for SMBsY CombinatorW21Activechecked 2026-08-23
Pangea.app

Hire Fractional Marketing + Design Talent

B2B SaaSFractional talent marketplace for marketing and designY CombinatorW21Activechecked 2026-08-23
ParsagonAI

AI to track and analyze public policy

B2B SaaSAI policy monitoring and analysis platformY CombinatorW21Activechecked 2026-08-23
Partnered

The network where sales teams connect to share customer introductions.

B2B SaaSSales network for introductionsY CombinatorW21Acquired2026-08-23
Pensil

New-Age White Label Community Platform SDKs and APIs for Games,…

B2B SaaSwhite label community platform SDKs for gamingY CombinatorW21Inactive2026-08-23
peopleCQ

Employer backed payroll advances for employees in Egypt

Fintechpayroll advances for emerging marketsY CombinatorW21Activechecked 2026-08-23
Per DiemAI

The AI operating system for restaurants

Vertical AI agentsAI operating system for restaurantsY CombinatorW21Activechecked 2026-08-23
Pesto-Y CombinatorW21Activechecked 2026-08-17
Phoenix

Canada's digital health clinic for men

Healthcare and biodigital telehealth platform for menY CombinatorW21Active2026-08-20
Pibit.aiAI

The fastest path from submission to better decisions.

Vertical AI agentsAI underwriting agents for insuranceY CombinatorW21Activechecked 2026-08-23
PingPong

Video messaging app for remote teams.

Horizontal AI assistantsasync video collaboration platformY CombinatorW21Acquiredchecked 2026-08-17
PipeBio

PipeBio is a SaaS bioinformatics platform to develop antibody drugs.

Healthcare and bioBioinformatics for antibody drug developmentY CombinatorW21Acquired2026-08-23
Platypus

The Distributed Data Operating System

B2B SaaSworkflow automation and data integrationY CombinatorW21Inactive2026-08-23
Playmaker

Community for fantasy sports players

Consumerfantasy sports community platformY CombinatorW21Inactivechecked 2026-08-17
Poliglota

The online language school for Latam, with groups led by an instructor

Consumeronline language learning platformY CombinatorW21Activechecked 2026-08-23
Popl

Your AI GTM platform for In-Person Events

B2B SaaSAI-powered event management and lead captureY CombinatorW21Activechecked 2026-08-23
PowerRouter

PowerRouter helps sales teams with lead routing in Salesforce

B2B SaaSLead routing automation for SalesforceY CombinatorW21Activechecked 2026-08-23
Pragmatic Leaders (Ankai Inc)

AI-powered Corporate Training: Faster, Smarter, and More Effective

B2B SaaSAI-powered corporate training platformY CombinatorW21Active-
Preki

Shopify for LatAm

Commerce and marketplacesE-commerce platform for LatAm SMBsY CombinatorW21Acquiredchecked 2026-08-17
Prendea

Live afterschool classes for Spanish-speaking kids ages 4 to 15.

Consumerlive afterschool classes for kidsY CombinatorW21Inactivechecked 2026-08-17
Prequel

Helping B2B co's sync data to their customers

Data for AIdata pipelines and warehousing syncY CombinatorW21Activechecked 2026-08-23
Procoto

Self-service RFP management

Commerce and marketplacesprocurement and vendor managementY CombinatorW21Acquiredchecked 2026-08-23
Promoted.aiAI

Dramatically better search and ads for marketplaces

Commerce and marketplacesAI-powered marketplace search and rankingY CombinatorW21Acquiredchecked 2026-08-17
Prospa

Banking for businesses

FintechSMB business bankingY CombinatorW21Activechecked 2026-08-23
Pry Financials

Finance for Founders (now at prune.com)

B2B SaaSFinancial planning for startupsY CombinatorW21Acquired2026-08-23
Purpose Finance

Accelerating the shift to a more transparent economy

ConsumerESG shopping and rewards appY CombinatorW21Inactivechecked 2026-08-24
Pyroscope

Open source continuous profiling software to debug performance issues

Developer toolsContinuous profiling and debuggingY CombinatorW21Acquired2026-08-23
Quadrant EyeAI

Breaking new ground in online eyecare.

Healthcare and bioAI-powered remote eye examsY CombinatorW21Inactivechecked 2026-08-17
Quadrant HealthAI

Analyzing EHR and messaging data to predict disease before it occurs.

Healthcare and bioPredictive disease analytics from EHR dataY CombinatorW21Activechecked 2026-08-23
Queenly

Leading marketplace for formalwear

Commerce and marketplacesFormalwear marketplaceY CombinatorW21Inactive2026-08-23
Quicknode

Tools & infra to build and scale high-quality blockchain applications.

Developer toolsBlockchain API infrastructureY CombinatorW21Activechecked 2026-08-23
QuotaBook

Equity management platform for startups and investors.

Fintechequity management platform for startupsY CombinatorW21Activechecked 2026-08-23
R2

Embedded lending infrastructure

Fintechembedded lending for SMBsY CombinatorW21Acquiredchecked 2026-08-23
Reclaim Protocol

Education, Employment, Loyalty verification. Global & Compliant.

Security and complianceIdentity verification and complianceY CombinatorW21Activechecked 2026-08-23
Recover

Government-funded online addiction treatment

Healthcare and biotelemedicine addiction treatmentY CombinatorW21Activechecked 2026-08-24
Redcliffe Lifetech

Redcliffe Labs is India's Largest Omni-channel Diagnostics platform

Healthcare and biodiagnostic testing platformY CombinatorW21Activechecked 2026-08-17
REGENT

All-electric seagliders for fast, affordable regional transportation

Robotics and physical worldElectric seaglider aircraftY CombinatorW21Activechecked 2026-08-23
Rejoy HealthAI

AI workers that book, scribe, code, interpret, and answer clinicians

Vertical AI agentsAI clinical operations and documentationY CombinatorW21Activechecked 2026-08-23
Remora

Carbon capture for vehicles

Climate and energycarbon capture from vehicle exhaustY CombinatorW21Activechecked 2026-08-23
Reshape Biotech

Robots that automate the everyday tasks of microbiologists.

Robotics and physical worldLab automation robots for microbiologyY CombinatorW21Activechecked 2026-08-23
Resquared

Marketing automation platform for selling to local businesses.

B2B SaaSMarketing automation for local businessesY CombinatorW21Activechecked 2026-08-23
Rethoric

LinkedIn content consultancy and scheduling platform for busy founders

B2B SaaSLinkedIn content and scheduling platformY CombinatorW21Activechecked 2026-08-23
Rinsed

Software to run car washes moving to a monthly subscription model

B2B SaaSCar wash management softwareY CombinatorW21Activechecked 2026-08-23
RocketSDRAI

AI Native Sales Outreach Platform

Vertical AI agentsAI-powered sales outreach automationY CombinatorW21Activechecked 2026-08-23
ROGER

The Best Way to Sign Contracts Since Handshakes. Roger that.

B2B SaaSeSignature and contract managementY CombinatorW21Activechecked 2026-08-23
Roin Technologies

Building robots to automate commercial concrete construction.

Robotics and physical worldConcrete construction automation robotsY CombinatorW21Acquiredchecked 2026-08-17
RoutineAI

AI-native all-in-one workspace for startups

B2B SaaSAI-native workspace aggregationY CombinatorW21Activechecked 2026-08-23
Rulebricks

Add powerful decision-making capabilities to any automated workflow.

Developer toolsWorkflow logic and decision-making platformY CombinatorW21Activechecked 2026-08-23
Runway

Easier and more reliable mobile app releases for teams.

Developer toolsMobile app release managementY CombinatorW21Activechecked 2026-08-23
SBX RoboticsAI

Synthetic data for better vision.

Data for AIsynthetic data for robot visionY CombinatorW21Inactivechecked 2026-08-17
Seer

Sell beyond the store.

B2B SaaSretail sales enablement platformY CombinatorW21Activechecked 2026-08-23
Segments.ai

Build better computer vision models by building better datasets

Data for AIMulti-sensor data labeling platformY CombinatorW21Acquiredchecked 2026-08-23
Sendbox

Fulfillment by Amazon for African merchants

Commerce and marketplacesAfrican e-commerce fulfillmentY CombinatorW21Activechecked 2026-08-23
Serna Bio

Genetic Medicine with Small Molecules

Healthcare and bioSmall molecule RNA therapeuticsY CombinatorW21Activechecked 2026-08-23
Shepherd

Modernizing commercial insurance

FintechCommercial insurance platformY CombinatorW21Activechecked 2026-08-23
SigNoz

Open source alternative to DataDog

Developer toolsOpen source observability and APM platformY CombinatorW21Activechecked 2026-08-23
SimplifyAI

Helping a billion people build their dream career

Vertical AI agentsAI career agent for job seekersY CombinatorW21Activechecked 2026-08-23
Sivo

Debt as a service for companies to lend money to their users at scale.

Fintechembedded lending infrastructureY CombinatorW21Activechecked 2026-08-23
SlashAuth

The solution for fine-grained access control in web3

Security and complianceweb3 access control infrastructureY CombinatorW21Inactivechecked 2026-08-24
Smartcuts

Chrome extension to turn clicks & keystrokes into no-code automations

Developer toolsbrowser automation and no-code workflowsY CombinatorW21Activechecked 2026-08-23
Solo

We help people resolve debt.

Fintechdebt resolution and legal documentsY CombinatorW21Activechecked 2026-08-23
Somos

Internet for the urban developing world.

Otherwireless infrastructure for emerging marketsY CombinatorW21Active, new domain2026-08-23
SorabanAI

AI tax workflow platform for accounting firms

Vertical AI agentsAI tax workflow for accounting firmsY CombinatorW21Activechecked 2026-08-23
Spline

Design and collaborate in multiple dimensions.

Developer tools3D design and collaboration platformY CombinatorW21Activechecked 2026-08-23
SpoknAI

AI-powered video platform for Internal Comms and HR teams

B2B SaaSEmployee video creation for internal commsY CombinatorW21Active, new domain2026-08-23
SpruceID

SpruceID lets users control their data across the web.

Security and compliancedecentralized identity infrastructureY CombinatorW21Activechecked 2026-08-23
StacksiAI

Automated Answers to Security Questionnaires

Security and complianceSecurity questionnaire automationY CombinatorW21Acquiredchecked 2026-08-17
Stayflexi

Operating System for Hotels and Vacation Rentals

B2B SaaSHotel and vacation rental operations managementY CombinatorW21Activechecked 2026-08-23
Stoke Space

Seamless mobility to, through, and from space. It starts with 100%…

Defense and spacereusable rocket launch vehicleY CombinatorW21Activechecked 2026-08-23
Striga

Compliant Crypto and Banking Infrastructure

FintechCrypto banking and compliance infrastructureY CombinatorW21Acquiredchecked 2026-08-23
SupadockAI

AI workers for logistics operations

Vertical AI agentsAI workers for logistics complianceY CombinatorW21Activechecked 2026-08-23
Svix

Enterprise ready webhooks service, open-source and in the cloud

Developer toolsWebhook delivery infrastructureY CombinatorW21Activechecked 2026-08-23
Swadesi Way

Healthy organic food that creates a positive impact

Consumerorganic food marketplaceY CombinatorW21Activechecked 2026-08-23
SwiftSku

Management and analytics software for convenience stores

B2B SaaSStore management and analytics for convenience storesY CombinatorW21Activechecked 2026-08-23
TaloflowAI

Better, faster tech vendor research

Developer toolsAI-powered tech vendor research and selectionY CombinatorW21Activechecked 2026-08-23
TaoFi

The financial layer for decentralized AI

FintechDeFi infrastructure for AIY CombinatorW21Acquiredchecked 2026-08-17
Taste

Online marketplace for dinners shipped from great restaurants

Commerce and marketplacesrestaurant marketplace deliveryY CombinatorW21Inactivechecked 2026-08-17
TechBiz

MIS on mobile for SMB's in India

B2B SaaSMobile MIS for Indian SMBsY CombinatorW21Acquiredchecked 2026-08-17
Terapify

Online therapy platform for the Spanish-speaking market

Healthcare and bioTelehealth therapy platformY CombinatorW21Activechecked 2026-08-23
Terra API

API for developers and AIs to access health data

Data for AIhealth data integration APIY CombinatorW21Activechecked 2026-08-23
Text Blaze

Slash commands anywhere

B2B SaaStext automation and templatingY CombinatorW21Activechecked 2026-08-23
The Third Place

Subscriptions for neighborhood businesses

B2B SaaSsubscription management for local businessesY CombinatorW21Activechecked 2026-08-23
Tilt

Bringing the joy of cycling to millions of Indians

Consumerbike sharing marketplaceY CombinatorW21Activechecked 2026-08-23
Tint

Makes it easy for tech platforms to embed insurance into products

Fintechembedded insurance platformY CombinatorW21Activechecked 2026-08-23
Topkey

Topkey | Financial Automation for Vacation & Short-Term Rental Managers

B2B SaaSExpense management for hospitalityY CombinatorW21Activechecked 2026-08-23
Topline Pro

Generative AI powered Shopify for home service professionals

B2B SaaSWebsite and booking platform for home servicesY CombinatorW21Activechecked 2026-08-23
TractianAI

Physical AI for asset-heavy industries

Robotics and physical worldPredictive maintenance for manufacturing assetsY CombinatorW21Activechecked 2026-08-23
Treinta

Software and AI tools for SMBs in the US and Latin America

B2B SaaSFinancial and inventory management for SMBsY CombinatorW21Activechecked 2026-08-23