Category — Open Source

97 Open Source startups worth watching

A curated index of open source companies — from bootstrapped indie hackers to venture-backed category-defining startups. Updated weekly.

SurrealDB
The ultimate multi-model database
EdgeDB
A next-generation relational database
TimescaleDB
Time-series SQL built on Postgres
LanceDB
Multimodal vector database for AI
MinIO
High-performance S3-compatible object storage
RisingWave
Streaming SQL for real-time analytics
ClickHouse
The fastest OLAP database in the world
CockroachDB
Distributed SQL that survives anything
Zitadel
Identity infrastructure for your next project
Authentik
Open source identity provider that just works
Ory
Cloud native identity and access management
BoxyHQ
Enterprise SSO and directory sync in minutes
SuperTokens
Open source authentication that is 10x easier
Strapi
The leading open-source headless CMS
Keystatic
Git-based CMS for your code editor and GitHub
TinaCMS
Visual editing for your Git-backed website
KeystoneJS
The superpowered Node.js headless CMS
Plausible Analytics
Privacy-first Google Analytics alternative
Umami
Simple, fast, privacy-focused web analytics
OpenReplay
Open source session replay and debugging suite
HyperDX
Open source observability platform
OpenPanel
Open source analytics for product and marketing teams
Listmonk
Self-hosted newsletter and mailing list manager
Dittofeed
Open source customer engagement platform
Mattermost
Open source Slack alternative for developers
Zulip
Organized team chat that does not interrupt you
Coolify
Self-host Heroku and Netlify on your own server
Portainer
Container management made simple
Traefik
The cloud-native application proxy
Gitea
Painless self-hosted all-in-one software development
Woodpecker CI
Simple yet powerful CI/CD engine with great extensibility
Garden
Dev environments and CI/CD for Kubernetes teams
DevPod
Open source dev containers on any infrastructure
GrowthBook
Open source feature flagging and A/B testing
Flagsmith
Feature flags and remote config for any platform
Flipt
Enterprise-ready, open source feature management
Unleash
The enterprise open source feature management solution
Medusa
Building blocks for digital commerce
Saleor
Open source GraphQL-first e-commerce platform
Vendure
A headless GraphQL e-commerce framework
Nuclei
Fast and customizable vulnerability scanner
Trivy
All-in-one open source security scanner
Caido
A lightweight web security auditing toolkit
Bytebase
Database DevOps and CI/CD for teams
Open WebUI
ChatGPT-style UI for any LLM
LobeChat
Modern open source ChatGPT UI framework
LiteLLM
Call 100+ LLMs with one interface
OpenLIT
Open source LLM observability and evaluation
Opik
Open source LLM evaluation and tracing
DeepEval
The open source LLM evaluation framework
Flowise
Drag-and-drop UI to build LLM flows
Langflow
Visual framework for building multi-agent AI apps
Continue
Open source AI code assistant for any LLM
Bruno
Open source IDE for exploring APIs
Hasura
Instant GraphQL and REST APIs on your data
Excalidraw
Virtual whiteboard for sketching hand-drawn diagrams
tldraw
A tiny little drawing app and SDK
Mermaid Chart
Diagrams and charts as code
AppFlowy
Open source Notion alternative
Outline
Fast, collaborative, wiki-style knowledge base
Logseq
Networked notes and knowledge graph
Notesnook
End-to-end encrypted notes app
Memos
Lightweight, self-hosted memo hub
Uptime Kuma
Self-hosted monitoring tool like UptimeRobot
GlitchTip
Open source error tracking
OneUptime
Open source observability and on-call platform
OpenObserve
Open source observability with 140x lower storage costs
Maybe Finance
Open source personal finance and wealth management
Actual Budget
Local-first personal budgeting app
OpenBB
Open source investment research terminal
Immich
Self-hosted Google Photos replacement
PhotoPrism
AI-powered photo manager with private cloud
Paperless-ngx
Document management that feels magical
Stirling PDF
Self-hosted PDF manipulation toolkit
Mathesar
Database UI as intuitive as a spreadsheet
OpenMetadata
Open standard for metadata and data discovery
Steampipe
SQL for cloud APIs and infrastructure
Monica
Personal CRM to remember your relationships
Rallly
Open source scheduling and meeting polls
Huly
All-in-one project management platform
Leantime
Open source project management for non-project managers
Taiga
Free open source agile project management tool
Grist
Modern relational spreadsheet with database power
NetBird
Zero-trust networking built on WireGuard
Firezone
Open source WireGuard-based VPN and access gateway
Headscale
Open source self-hosted Tailscale control server
Pangolin
Self-hosted tunneled reverse proxy with auth
Plandex
Open source AI coding agent for large projects
Screenpipe
Open source AI-powered screen and audio recorder
Composio
Integration platform for AI agents
SuperAgent
Open source AI agent platform
Postal
Full-featured open source mail delivery server
Stalwart
Secure and modern open source mail server
Mautic
Open source marketing automation platform
Vikunja
The open source to-do app
Docmost
Open source Confluence and Notion alternative
Grafana
The open observability platform