Founded — 2021
100 startups founded in 2021
Every startup in our index founded in 2021. Browse founders, investors, location, and product details.
- Anthropic
AI safety company building reliable, interpretable AI
- Modal
Run code in the cloud without managing infra
- Neon
Serverless Postgres with branching for developers
- Inngest
Durable background jobs and workflows in your code
- Zed
A high-performance, multiplayer code editor
- Cal.com
Open-source scheduling for everyone
- Beehiiv
The newsletter platform built for growth
- Captions
AI-powered video creation for social media
- Lemon Squeezy
Sell software, subscriptions, and digital downloads
- Jasper
AI for marketing teams that demand results
- Novu
Open-source notification infrastructure for developers
- Rogo
Generative AI for investment banking
- Codeium
AI code assistant and Windsurf IDE
- Highlight
Open source full-stack monitoring and error tracking
- Xata
Serverless database platform built on Postgres
- ElectricSQL
Local-first sync engine for Postgres applications
- Qdrant
High-performance vector search engine
- Socket
Supply chain security for open source dependencies
- Statsig
Feature flags and product experimentation platform
- Evidence
Open source business intelligence with Markdown and SQL
- Lago
Open source billing and metering for usage-based pricing
- Recall AI
Universal API to capture data from any meeting
- Jam
One-click bug reports that developers actually love
- Imbue
Building AI agents that can reason and code
- Coactive AI
AI platform for searching and understanding visual data
- Cleanlab
AI data quality platform for trustworthy training data
- Zuplo
Programmable API gateway for developer teams
- SST
Infrastructure framework for full-stack serverless apps
- Encore
Developer-first backend framework with built-in infra
- Wasp
Open source full-stack web framework for React and Node
- Grafbase
GraphQL platform with edge caching and federation
- Typebot
Open source chatbot builder with powerful logic
- ToolJet
Open source low-code platform for internal tools
- Luma AI
Photorealistic 3D capture and AI video generation
- Humanloop
Prompt management and LLM evaluation platform
- Predibase
Fine-tune and serve LLMs at scale
- Hume AI
Empathic voice AI that understands human expression
- Cerbos
Open-source authorisation layer for any stack
- Permit.io
Full-stack permissions and access control
- Better Stack
Uptime monitoring, logs, and incident management
- SigNoz
Open-source observability — logs, metrics, traces
- Knock
Flexible notification infrastructure for developers
- NocoDB
Open-source Airtable alternative on your database
- Tauri
Build smaller, faster, more secure desktop apps
- WunderGraph
API integration platform and GraphQL federation
- Folk
The CRM for all your relationships
- Clay
Data enrichment and outreach automation
- Instantly
Cold email platform with unlimited sending accounts
- Reflect
Networked note-taking app for fast thinkers
- Tana
All-in-one knowledge management for power users
- AFFiNE
Open-source Notion and Miro alternative
- Stigg
Product-led billing infrastructure
- Orb
Usage-based billing infrastructure for SaaS
- Slope
B2B buy-now-pay-later payments
- Escape
API security testing and DAST for developers
- Triple Whale
Ecommerce analytics and attribution platform
- Lightdash
Open-source BI on top of dbt
- Remotion
Create videos programmatically with React
- Character.AI
Chat with AI characters that feel human
- Midjourney
The world's leading AI image generation model
- Speak
AI-powered language learning through real conversation
- NewLimit
Reversing biological aging with epigenetics
- Cradle
Engineer better proteins with AI, 10x faster
- Colossal Biosciences
Bringing extinct species back to life
- Elicit
AI research assistant for scientific literature
- Halcyon
The only platform purpose-built to defeat ransomware
- Leland
Get coaching from experts who've been where you want to go
- Pallet
AI workers that handle freight operations end-to-end
- Freq
Tax-aware investing that maximizes after-tax returns
- Fun
Global stablecoin payments for modern fintechs
- Wander
Luxury smart home rentals with hotel-level service
- Palmstreet
Buy rare plants live from expert sellers
- Ghost
B2B marketplace for brands to offload surplus inventory
- Amie
The joyful productivity app
- Row Zero
The fastest spreadsheet in the browser
- Column
A nationally chartered bank built for developers
- Meow
High-yield treasury management for startups
- SurrealDB
The ultimate multi-model database
- RisingWave
Streaming SQL for real-time analytics
- ClickHouse
The fastest OLAP database in the world
- BoxyHQ
Enterprise SSO and directory sync in minutes
- OpenReplay
Open source session replay and debugging suite
- Coolify
Self-host Heroku and Netlify on your own server
- Woodpecker CI
Simple yet powerful CI/CD engine with great extensibility
- Bytebase
Database DevOps and CI/CD for teams
- tldraw
A tiny little drawing app and SDK
- AppFlowy
Open source Notion alternative
- Notesnook
End-to-end encrypted notes app
- Memos
Lightweight, self-hosted memo hub
- Uptime Kuma
Self-hosted monitoring tool like UptimeRobot
- Maybe Finance
Open source personal finance and wealth management
- OpenBB
Open source investment research terminal
- Paperless-ngx
Document management that feels magical
- Mathesar
Database UI as intuitive as a spreadsheet
- OpenMetadata
Open standard for metadata and data discovery
- Steampipe
SQL for cloud APIs and infrastructure
- Rallly
Open source scheduling and meeting polls
- NetBird
Zero-trust networking built on WireGuard
- Firezone
Open source WireGuard-based VPN and access gateway
- Headscale
Open source self-hosted Tailscale control server