Discover Open Source Alternatives

Find free and open source alternatives to popular software

77 tools

n8n

n8n

182,354TypeScriptNOASSERTION

Fair-code workflow automation platform with native AI capabilities. Combine visual building with custom code, self-host or cloud, 400+ integrations.

Open Core
dify

dify

135,655TypeScriptNOASSERTION

Production-ready platform for agentic workflow development.

Open Core
excalidraw

excalidraw

120,220TypeScriptMIT

Virtual whiteboard for sketching hand-drawn like diagrams

Freemium
supabase

supabase

100,179TypeScriptApache-2.0

The Postgres development platform. Supabase gives you a dedicated Postgres database to build your web, mobile, and AI applications.

Freemium
immich

immich

96,245TypeScriptAGPL-3.0

High performance self-hosted photo and video management solution.

Free
uptime-kuma

uptime-kuma

84,813JavaScriptMIT

A fancy self-hosted monitoring tool

Free
syncthing

syncthing

81,378GoMPL-2.0

Open Source Continuous File Synchronization

Free
hoppscotch

hoppscotch

78,780TypeScriptMIT

Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia

Freemium
grafana

grafana

72,956TypeScriptAGPL-3.0

The open and composable observability and data visualization platform. Visualize metrics, logs, and traces from multiple sources like Prometheus, Loki, Elasticsearch, InfluxDB, Postgres and many more.

Open Core
strapi

strapi

71,765TypeScriptNOASSERTION

🚀 Strapi is the leading open-source headless CMS. It’s 100% JavaScript/TypeScript, fully customizable, and developer-first.

Open Core
AppFlowy

AppFlowy

68,947DartAGPL-3.0

Bring projects, wikis, and teams together with AI. AppFlowy is the AI collaborative workspace where you achieve more without losing control of your data. The leading open source Notion alternative.

Open CoreJapanese UI
AFFiNE

AFFiNE

66,921TypeScriptNOASSERTION

There can be more than Notion and Miro. AFFiNE(pronounced [ə‘fain]) is a next-gen knowledge base that brings planning, sorting and creating all together. Privacy first, open-source, customizable and ready to use.

FreemiumJapanese UI
nocodb

nocodb

62,609TypeScriptNOASSERTION

🔥 🔥 🔥 A Free & Self-hostable Airtable Alternative

Open Core
minio

minio

60,609GoAGPL-3.0

MinIO is a high-performance, S3 compatible object store, open sourced under GNU AGPLv3 license.

Open Core
vaultwarden

vaultwarden

57,863RustAGPL-3.0

Unofficial Bitwarden compatible server written in Rust, formerly known as bitwarden_rs

Free
pocketbase

pocketbase

57,332GoMIT

Open Source realtime backend in 1 file

Free
appwrite

appwrite

55,515TypeScriptBSD-3-Clause

Appwrite® - complete cloud infrastructure for your web, mobile and AI apps. Including Auth, Databases, Storage, Functions, Messaging, Hosting, Realtime and more

Freemium
gitea

gitea

54,712GoMIT

Git with a cup of tea! Painless self-hosted all-in-one software development service, including Git hosting, code review, team collaboration, package registry and CI/CD

Open Core
coolify

coolify

52,549PHPApache-2.0

An open-source, self-hostable PaaS alternative to Vercel, Heroku & Netlify that lets you easily deploy static sites, databases, full-stack applications and 280+ one-click services on your own servers.

Open Core
Ghost

Ghost

52,344JavaScriptMIT

Independent technology for modern publishing, memberships, subscriptions and newsletters.

Open Core
plane

plane

47,274TypeScriptAGPL-3.0

🔥🔥🔥 Open-source Jira, Linear, Monday, and ClickUp alternative. Plane is a modern project management platform to manage tasks, sprints, docs, and triage.

Open Core
tldraw

tldraw

46,180TypeScriptNOASSERTION

very good whiteboard infinite canvas SDK

Free
penpot

penpot

45,178ClojureMPL-2.0

Penpot: The open-source design tool for design and code collaboration

Freemium
Rocket.Chat

Rocket.Chat

45,077TypeScriptNOASSERTION

The Secure CommsOS™ for mission-critical operations

Open CoreJapanese UI
twenty

twenty

43,547TypeScriptNOASSERTION

Building a modern alternative to Salesforce, powered by the community.

Open Core
bruno

bruno

42,531JavaScriptMIT

Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)

Free
logseq

logseq

41,832ClojureAGPL-3.0

A privacy-first, open-source platform for knowledge management and collaboration. Download link: http://github.com/logseq/logseq/releases. roadmap: https://discuss.logseq.com/t/logseq-product-roadmap/34267

Freemium
cal.com

cal.com

40,958TypeScriptNOASSERTION

Scheduling infrastructure for absolutely everyone.

Open Core
outline

outline

37,936TypeScriptNOASSERTION

The fastest knowledge base for growing teams. Beautiful, realtime collaborative, feature packed, and markdown compatible.

Open CoreJapanese UI
portainer

portainer

37,049TypeScriptZlib

Making Docker and Kubernetes management easy.

Open Core
mattermost

mattermost

36,060TypeScriptNOASSERTION

Mattermost is an open source platform for secure collaboration across the entire software development lifecycle..

Open CoreJapanese UI
umami

umami

35,977TypeScriptMIT

Umami is a modern, privacy-focused analytics platform. An open-source alternative to Google Analytics, Mixpanel and Amplitude.

Freemium
Trilium

Trilium

35,296TypeScriptAGPL-3.0

Build your personal knowledge base with Trilium Notes

Free
directus

directus

34,635TypeScriptNOASSERTION

The flexible backend for all your projects 🐰 Turn your DB into a headless CMS, admin panels, or apps with a custom UI, instant APIs, auth & more.

Open Core
server

server

34,520PHPAGPL-3.0

☁️ Nextcloud server, a safe home for all your data

Open Core
erpnext

erpnext

32,655PythonGPL-3.0

Free and Open Source Enterprise Resource Planning (ERP)

Open Core
posthog

posthog

32,361PythonNOASSERTION

🦔 PostHog is an all-in-one developer platform for building successful products. We offer product analytics, web analytics, session replay, error tracking, feature flags, experimentation, surveys, data warehouse, a CDP, and an AI product assistant to help debug your code, ship features faster, and keep all your usage and customer data in one stack.

Open Core
dokku

dokku

31,927ShellMIT

A docker-powered PaaS that helps you build and manage the lifecycle of applications

Free
jitsi-meet

jitsi-meet

28,931TypeScriptApache-2.0

Jitsi Meet - Secure, Simple and Scalable Video Conferences that you use as a standalone app or embed in your web application.

Free
chatwoot

chatwoot

28,198RubyNOASSERTION

Open-source live-chat, email support, omni-channel desk. An alternative to Intercom, Zendesk, Salesforce Service Cloud etc. 🔥💬

Open Core
wiki

wiki

28,119VueAGPL-3.0

Wiki.js | A modern and powerful wiki app built on Node.js

FreeJapanese UI
label-studio

label-studio

26,927TypeScriptApache-2.0

Label Studio is a multi-type data labeling and annotation tool with standardized output format

Open Core
signoz

signoz

26,392TypeScriptNOASSERTION

SigNoz is an open-source observability platform native to OpenTelemetry with logs, traces and metrics in a single application. An open-source alternative to DataDog, NewRelic, etc. 🔥 🖥. 👉 Open source Application Performance Monitoring (APM) & Observability tool

Open Core
infisical

infisical

25,686TypeScriptNOASSERTION

Infisical is the open-source platform for secrets, certificates, and privileged access management.

Open Core
zulip

zulip

24,984PythonApache-2.0

Zulip server and web application. Open-source team chat that helps teams stay productive and focused.

Open CoreJapanese UI
analytics

analytics

24,526ElixirAGPL-3.0

Simple, open source, lightweight and privacy-friendly web analytics alternative to Google Analytics.

Open Core
gitlabhq

gitlabhq

24,290RubyNOASSERTION

GitLab CE Mirror | Please open new issues in our issue tracker on GitLab.com

Open Core
activepieces

activepieces

21,542TypeScriptNOASSERTION

AI Agents & MCPs & AI Workflow Automation • (~400 MCP servers for AI agents) • AI Automation / AI Agent with MCPs • AI Workflows & AI Agents • MCPs for AI Agents

Open Core
matomo

matomo

21,406PHPGPL-3.0

Empowering People Ethically 🚀 — Matomo is hiring! Join us → https://matomo.org/jobs Matomo is the leading open-source alternative to Google Analytics, giving you complete control and built-in privacy. Easily collect, visualise, and analyse data from websites & apps. Star us on GitHub ⭐️ – Pull Requests welcome!

Open Core
wekan

wekan

20,893JavaScriptMIT

The Open Source kanban, built with Meteor. GitHub issues/PRs are only for FLOSS Developers, not for support, support is at https://wekan.fi/commercial-support/ . New English strings for new features at imports/i18n/data/en.i18n.json . Non-English translations at https://app.transifex.com/wekan/wekan only.

Free
listmonk

listmonk

19,430GoAGPL-3.0

High performance, self-hosted, newsletter and mailing list manager with a modern dashboard. Single binary app.

Free
BookStack

BookStack

18,568PHPMIT

A platform to create documentation/wiki content built with PHP & Laravel

Free
livekit

livekit

17,961GoApache-2.0

End-to-end realtime stack for connecting humans and AI

Open Core
caprover

caprover

14,955TypeScriptNOASSERTION

Scalable PaaS (automated Docker+nginx) - aka Heroku on Steroids

Free
openproject

openproject

14,755RubyGPL-3.0

OpenProject is the leading open source project management software.

Open Core
seafile

seafile

14,530CNOASSERTION

Beyond file syncing and sharing, a new way to organize your files with extensible file properties and flexible views

Open Core
element-web

element-web

12,941TypeScriptAGPL-3.0

A glossy Matrix collaboration client for the web.

FreeJapanese UI
clients

clients

12,536TypeScriptNOASSERTION

Bitwarden client apps (web, browser extension, desktop, and cli).

Open Core
darktable

darktable

12,203CGPL-3.0

darktable is an open source photography workflow application and raw developer

FreeJapanese UI
formbricks

formbricks

12,025TypeScriptNOASSERTION

Open Source Qualtrics Alternative

Open Core
planka

planka

11,783JavaScriptNOASSERTION

PLANKA is the Kanban-style project mastering tool for everyone

Free
keystone

keystone

9,858TypeScriptMIT

The superpowered headless CMS for Node.js — built with GraphQL and React

Free
typebot.io

typebot.io

9,823TypeScriptNOASSERTION

💬 Typebot is a powerful chatbot builder that you can self-host.

Open Core
krita

krita

9,545C++GPL-3.0

Krita is a free and open source cross-platform application that offers an end-to-end solution for creating digital art files from scratch built on the KDE and Qt frameworks.

FreeJapanese UI
mautic

mautic

9,386PHPNOASSERTION

Mautic: Open Source Marketing Automation Software.

Open Core
nhost

nhost

9,123TypeScriptMIT

The Open Source Firebase Alternative with GraphQL.

Freemium
bigbluebutton

bigbluebutton

9,070JavaScriptLGPL-3.0

A complete web conferencing system for virtual classes and more!

Free
core

core

8,759PHPAGPL-3.0

:cloud: ownCloud web server core (Files, DAV, etc.)

Open Core
heyform

heyform

8,666TypeScriptAGPL-3.0

Open-Source Form Builder

Open Core
hedgedoc

hedgedoc

7,065TypeScriptAGPL-3.0

HedgeDoc - Ideas grow better together

Free
gimp

gimp

6,069CNOASSERTION

Read-only mirror of https://gitlab.gnome.org/GNOME/gimp

FreeJapanese UI
zammad

zammad

5,500RubyAGPL-3.0

Zammad is a web based open source helpdesk/customer support system.

Open Core
rallly

rallly

5,034TypeScriptAGPL-3.0

Rallly is an open-source scheduling and collaboration tool designed to make organizing events and meetings easier.

Freemium
baserow

baserow

4,551PythonNOASSERTION

Build databases, automations, apps & agents with AI — no code. Open source platform available on cloud and self-hosted. GDPR, HIPAA, SOC 2 compliant. Best Airtable alternative.

Open Core
freescout

freescout

4,172PHPAGPL-3.0

FreeScout — Free self-hosted help desk & shared mailbox (Zendesk / Help Scout alternative)

Free
discussions

discussions

2,345

Repository for miscellaneous repository management and discussions: https://github.com/revoltchat/revolt/discussions

Free
taiga

taiga

554PythonMPL-2.0

Taiga is a free and open-source project management for cross-functional agile teams.

Freemium

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FAQ

What is open source software (OSS)?
Software whose source code is publicly available for anyone to use, modify, and redistribute. Linux, Firefox, and WordPress are well-known examples.
What are the benefits of using OSS over commercial software?
OSS is free to use, fully customizable, and avoids vendor lock-in. With public source code, security is transparent and auditable.
Is OSS secure?
Many OSS projects are actively audited by large communities. Vulnerabilities (CVEs) are addressed quickly, and enterprise support is available from companies like Red Hat and Canonical.
What are the main OSS license types?
MIT (most permissive), Apache-2.0 (with patent protection), GPL (derivatives must be open), and AGPL (network use also requires disclosure) are the most common licenses.
What is self-hosting?
Running software on your own servers. It ensures data sovereignty and privacy. Many OSS projects offer easy self-hosting via Docker.
What are the listing criteria for this site?
Projects must be publicly available on GitHub, actively maintained, and serve as practical alternatives to commercial SaaS products.