YC 331 startups

YC Summer 2021

Every company from Y Combinator's Summer 2021 batch.

Last updated

2026-09-02

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Exa

Web search rebuilt for LLMs

Developer ToolsSearchAI

Online Training for Healthcare Jobs

Carbon markets platform and solutions

Carbon Capture and RemovalB2BClimate

Abhi is Pakistan's 1st financial wellness platform focusing on…

Automate finance operations with Python and AI

Artificial IntelligenceSaaSFinance

We're building fully automated labs for protein engineering

AI-powered Drug DiscoverySynthetic Biology

The AI career platform for healthcare workers

Artificial IntelligenceMarketplaceSaaS

Automation for dental clinics and insurance companies.

Artificial IntelligenceHealthcareHealth Insurance

Global platform for employee engagement with rewards&flexible benefits

SaaSHuman ResourcesB2B

Compound compliance: the central hub for meeting SEC obligations

Affogato AI — Your Agent for instant TikToks, Reels, and ads.

Artificial IntelligenceGenerative AIAI

Feel close, even when apart. One meaningful conversation at a time.

Podium for local businesses in Latam

Build factory ready tech packs in minutes.

The medical record & infrastructure stack for digital health companies

One source of truth for financial data.

Aleph Solutions (Alephee)

We help automotive aftermarket brands to supply and sell parts online

MarketplaceB2BE-commerce

Building Job driven Virtual Tech University for India 🇮🇳

EducationIncome Share AgreementseLearning

We help high-growth startups go viral on autopilot

Offers insurance to customers in a convenient & transparent way

One API to get clean data from any website for your AI agents at scale

Artificial IntelligenceDeveloper ToolsAPI

Portable cryoablation to prevent cervical cancer

HardwareHealth TechMedical Devices

Marketplace to buy managed vacation homes through fractional ownership

MarketplaceTravelProptech

Blood Test for Early Detection of Ovarian Cancer

HealthcareDiagnosticsWomen's Health

AppX helps social media creators launch their own mobile apps.

The AI-Native Turnkey Alternative Investment Platform (TAIP)

FintechFinanceInvesting

TURN STATIC DOCS INTO INSTANT ANSWERS

Build frictionless signup flows in minutes

Developer ToolsSaaSB2B

The global financial platform for affluent consumers in the Americas.

Modern Checkout Platform for D2C brands in Southeast Asia

The complete production quality platform. AI-powered E2E testing,…

Developer ToolsSaaSOpen Source

Build and share apps with friends

Artificial IntelligenceConsumerNo-code

One-hour antibiotic sensitivity testing

MicrofluidicsMedical Devices

Operating system for restaurants, focusing on Southeast Asia

Apps to control technology addictions/ helping startups hire engineers

Google-level engineering productivity suite

Developer ToolsSaaSB2B

Get matched with top 1% of talents in 24h

MarketplaceB2BRecruiting

Grow Your Wealth With Baraka

Smart micro financing for everyone

Machine LearningLending

Workflows for repetitive customer-facing tasks

One chat app to rule them all

Connect LinkedIn to your CRM to automate and track LinkedIn outreach.

Remote labor for restaurants

Artificial IntelligenceFood Service Robots & MachinesSaaS

Accounts receivable automation to help companies get paid faster

We make bacteria and plants that clean up pollution.

BiotechSustainability

Speech and accent coaching app for non-native English speakers

EducationSpeech Recognition

The platform for buying, selling and managing residential construction

FintechMarketplaceProptech

No-code scoring engine identifying your most engaged upsell opps

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1 of 4 similar companies is hiring right now · most common: Engineering

Elphinstone, Inc.

Robo-advisory platform for Pakistan

The AI Platform for Medical Education

Artificial IntelligenceEducationHealthcare

We give AI agents realtime web context.

The API to search, scrape, and interact with the web at scale. 🔥

Developer ToolsOpen SourceAI

Open Jobs 14

Team 35

Founded 2022

YC S21 startupsAll cohort members Startups in San Francisco2567 indexed Dev Tools startupsFull category listing "SaaS" startups1005 indexed

YC Summer 2021

Five standout startups, five open roles, every Monday

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