Discover Open Source Alternatives

Find free and open source alternatives to popular software

123 tools

n8n

n8n

203,518TypeScriptNOASSERTION

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

Open Core
ollama

ollama

180,272GoMIT

Get up and running with Kimi-K2.6, GLM-5.2, MiniMax, DeepSeek, gpt-oss, Qwen, Gemma and other models.

Free
dify

dify

154,600TypeScriptNOASSERTION

Build Agentic workflows, RAG pipelines, with rich AI model and tool support on one collaborative workspace. Deploy on cloud, VPC, or self-hosted, so teams move from prototype to production without rebuilding the stack.

Open Core
open-webui

open-webui

151,096PythonNOASSERTION

User-friendly AI Interface (Supports Ollama, OpenAI API, ...)

Free
excalidraw

excalidraw

131,238TypeScriptMIT

Virtual whiteboard for sketching hand-drawn like diagrams

Freemium
immich

immich

113,511TypeScriptAGPL-3.0

High performance self-hosted photo and video management solution.

Free
supabase

supabase

108,897TypeScriptApache-2.0

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

Freemium
Stirling-PDF

Stirling-PDF

91,373JavaNOASSERTION

#1 PDF Application on GitHub that lets you edit PDFs on any device anywhere

Free
uptime-kuma

uptime-kuma

91,037JavaScriptMIT

A fancy self-hosted monitoring tool

Free
syncthing

syncthing

88,329GoMPL-2.0

Open Source Continuous File Synchronization

Free
hoppscotch

hoppscotch

80,220TypeScriptMIT

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

Freemium
grafana

grafana

76,627TypeScriptAGPL-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
AppFlowy

AppFlowy

76,337DartAGPL-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 Core
superset

superset

74,663PythonApache-2.0

Apache Superset is a Data Visualization and Data Exploration Platform

Free
strapi

strapi

73,078TypeScriptNOASSERTION

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

Open Core
AFFiNE

AFFiNE

72,227TypeScriptNOASSERTION

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.

Freemium
vaultwarden

vaultwarden

66,922RustAGPL-3.0

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

Free
prometheus

prometheus

65,967GoApache-2.0

The Prometheus monitoring system and time series database.

Free
anything-llm

anything-llm

65,681JavaScriptMIT

Stop renting your intelligence. Own it with AnythingLLM. Everything you need for a powerful local-first agent experience

Open Core
nocodb

nocodb

64,859TypeScriptNOASSERTION

🔥 🔥 🔥 A Free & Self-hostable Airtable Alternative

Open Core
coolify

coolify

61,475PHPApache-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
pocketbase

pocketbase

60,959GoMIT

Open Source realtime backend in 1 file

Free
penpot

penpot

59,653ClojureMPL-2.0

Penpot: The open-source design platform for Product teams that need scalable collaboration.

Freemium
meilisearch

meilisearch

59,193RustNOASSERTION

A lightning-fast search engine API bringing AI-powered hybrid search to your sites and applications.

Open Core
plane

plane

58,956TypeScriptAGPL-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
gitea

gitea

57,846GoMIT

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
appwrite

appwrite

57,301TypeScriptBSD-3-Clause

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

Freemium
jellyfin

jellyfin

56,578C#GPL-2.0

The Free Software Media System - Server Backend & API

Free
twenty

twenty

56,342TypeScriptNOASSERTION

The open alternative to Salesforce, designed for AI.

Open Core
joplin

joplin

56,256TypeScriptNOASSERTION

Joplin - the privacy-focused note taking app with sync capabilities for Windows, macOS, Linux, Android and iOS.

Free
Ghost

Ghost

55,182JavaScriptMIT

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

Open Core
odoo

odoo

54,187PythonNOASSERTION

Odoo. Open Source Apps To Grow Your Business.

Open Core
mastodon

mastodon

50,273RubyAGPL-3.0

Your self-hosted, globally interconnected microblogging community

Free
tldraw

tldraw

50,164TypeScriptNOASSERTION

Build infinite canvas apps in React with the tldraw SDK. World's best, top-most agent recommended #1 five star SDK.

Free
metabase

metabase

49,104ClojureNOASSERTION

The easy-to-use open source Business Intelligence and Embedded Analytics tool that lets everyone work with data :bar_chart:

Open Core
cal.diy

cal.diy

48,196TypeScriptMIT

Scheduling infrastructure for absolutely everyone.

Open Core
bruno

bruno

46,781JavaScriptMIT

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

Free
siyuan

siyuan

46,193TypeScriptAGPL-3.0

An open-source, privacy-first, self-hosted knowledge workspace where humans and AI agents work together 开源、隐私优先、自托管的知识工作空间,让人与智能体在此协作

Freemium
Rocket.Chat

Rocket.Chat

46,089TypeScriptNOASSERTION

The Secure CommsOS™ for mission-critical operations

Open Core
paperless-ngx

paperless-ngx

44,888PythonGPL-3.0

A community-supported supercharged document management system: scan, index and archive all your documents

Free
logseq

logseq

44,796ClojureAGPL-3.0

A privacy-first, open-source platform for knowledge management and collaboration. Download link: http://github.com/logseq/logseq/releases. roadmap: https://logseq.io/p/NX4mc_ggEV

Freemium
ToolJet

ToolJet

40,850JavaScriptAGPL-3.0

Open-source foundation of ToolJet AI - the enterprise app generation platform for internal tools, dashboards, business applications, workflows and AI agents. Build visually, from a prompt, or from Claude Code, Codex and Cursor over MCP 🚀

Open Core
appsmith

appsmith

40,824TypeScriptApache-2.0

Platform to build admin panels, internal tools, and dashboards. Integrates with 25+ databases and any API.

Open Core
outline

outline

40,472TypeScriptNOASSERTION

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

Open Core
posthog

posthog

39,610PythonNOASSERTION

:hedgehog: PostHog is the leading platform for building self-driving products. Our developer tools – AI observability, analytics, session replay, flags, experiments, error tracking, logs, and more – capture all the context agents need to diagnose problems, uncover opportunities, and ship fixes. Steer it all from Slack, web, desktop, or the MCP.

Open Core
mattermost

mattermost

38,996TypeScriptNOASSERTION

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

Open Core
erpnext

erpnext

38,940PythonGPL-3.0

Free and Open Source Enterprise Resource Planning (ERP)

Open Core
umami

umami

38,630TypeScriptMIT

Umami is a privacy-first analytics platform. Traffic, campaigns, behavior, conversions, and revenue in one place — no cookies, no surveillance, self-hosted or in the cloud.

Freemium
portainer

portainer

38,442TypeScriptZlib

Making Docker and Kubernetes management easy.

Open Core
directus

directus

37,777TypeScriptNOASSERTION

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
Trilium

Trilium

37,741TypeScriptAGPL-3.0

Build your personal knowledge base with Trilium Notes

Free
server

server

36,735PHPAGPL-3.0

☁️ Nextcloud server, a safe home for all your data

Open Core
keycloak

keycloak

36,624JavaApache-2.0

Open Source Identity and Access Management For Modern Applications and Services

Free
chatwoot

chatwoot

36,536RubyNOASSERTION

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

Open Core
refine

refine

35,635TypeScriptMIT

A React Framework for building internal tools, admin panels, dashboards & B2B apps with unmatched flexibility.

Free
dokku

dokku

32,122ShellMIT

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

Free
signoz

signoz

32,024TypeScriptNOASSERTION

SigNoz is an open-source, OpenTelemetry-native observability platform for your team and their AI agents. Get logs, metrics, and traces in one tool with features like APM, distributed tracing, log management, infra monitoring, etc. Combined with SigNoz MCP and a native AI teammate (in SigNoz Cloud) it helps you build more resilient apps.

Open Core
jitsi-meet

jitsi-meet

29,877TypeScriptApache-2.0

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

Free
harbor

harbor

29,319GoApache-2.0

An open source trusted cloud native registry project that stores, signs, and scans content.

Free
infisical

infisical

29,144TypeScriptNOASSERTION

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

Open Core
analytics

analytics

28,901ElixirAGPL-3.0

Open source, privacy-first web analytics. Lightweight, cookie-free Google Analytics alternative. Self-hosted or cloud.

Open Core
wiki

wiki

28,847VueAGPL-3.0

Wiki.js | Next Generation Open Source Wiki

Free
keepassxc

keepassxc

28,696C++NOASSERTION

KeePassXC is a cross-platform community-driven port of the Windows application “KeePass Password Safe”.

Free
budibase

budibase

28,257TypeScriptNOASSERTION

AI agents, automations and apps that run your operations. Model agnostic.

Open Core
label-studio

label-studio

28,219TypeScriptApache-2.0

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

Open Core
platform

platform

27,579TypeScriptEPL-2.0

Huly — All-in-One Project Management Platform (alternative to Linear, Jira, Slack, Notion, Motion)

Open Core
typesense

typesense

26,517C++GPL-3.0

Open Source alternative to Algolia + Pinecone and an Easier-to-Use alternative to ElasticSearch ⚡ 🔍 ✨ Fast, typo tolerant, in-memory fuzzy Search Engine for building delightful search experiences

Open Core
focalboard

focalboard

26,447TypeScriptNOASSERTION

Focalboard is an open source, self-hosted alternative to Trello, Notion, and Asana.

Free
zulip

zulip

25,852PythonApache-2.0

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

Open Core
authentik

authentik

25,381PythonNOASSERTION

The authentication glue you need.

Open Core
gitlabhq

gitlabhq

24,552RubyNOASSERTION

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

Open Core
activepieces

activepieces

24,295TypeScriptNOASSERTION

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
nocobase

nocobase

24,055TypeScriptNOASSERTION

NocoBase is an open-source AI + no-code platform for building business systems fast. Instead of generating everything from scratch, AI works on top of production-proven infrastructure and a WYSIWYG no-code interface, so you get both speed and reliability.

Open Core
listmonk

listmonk

23,283GoAGPL-3.0

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

Free
matomo

matomo

21,842PHPGPL-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

21,072JavaScriptMIT

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/ . PR source translation to imports/i18n/data/en.i18n.json, other translations at https://app.transifex.com/wekan/wekan

Free
livekit

livekit

20,738GoApache-2.0

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

Open Core
BookStack

BookStack

19,025PHPMIT

NOW MANAGED ON CODEBERG

Free
openproject

openproject

16,032RubyGPL-3.0

OpenProject is the leading open source project management software for product, project and portfolio management. A powerful Jira alternative with agile planning, issue tracking, roadmaps, Gantt charts, time tracking, collaboration features, and more. Available on premises or in the cloud. ⭐ Star us on GitHub

Open Core
FreshRSS

FreshRSS

15,932PHPAGPL-3.0

A free, self-hostable news aggregator…

Free
answer

answer

15,664GoApache-2.0

A Q&A platform software for teams at any scales. Whether it's a community forum, help center, or knowledge management platform, you can always count on Apache Answer.

Free
PeerTube

PeerTube

15,314TypeScriptAGPL-3.0

ActivityPub-federated video streaming platform using P2P directly in your web browser

Free
seafile

seafile

15,216CNOASSERTION

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

Open Core
caprover

caprover

15,155TypeScriptNOASSERTION

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

Free
duplicati

duplicati

14,970C#NOASSERTION

Store securely encrypted backups in the cloud!

Free
documenso

documenso

14,907TypeScriptAGPL-3.0

The Open Source DocuSign Alternative.

Open Core
crowdsec

crowdsec

14,771GoMIT

CrowdSec - the open-source and participative security solution offering crowdsourced protection against malicious IPs and access to the most advanced real-world CTI.

Open Core
coder

coder

14,381GoAGPL-3.0

Secure environments for developers and their agents

Open Core
clients

clients

13,751TypeScriptNOASSERTION

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

Open Core
element-web

element-web

13,434TypeScriptAGPL-3.0

A glossy Matrix collaboration client for the web.

Free
darktable

darktable

13,025CGPL-3.0

darktable is an open source photography workflow application and raw developer

Free
formbricks

formbricks

12,894TypeScriptNOASSERTION

Open Source Qualtrics Alternative

Open Core
planka

planka

12,513JavaScriptNOASSERTION

PLANKA is the Kanban-style project mastering tool for everyone

Free
mautic

mautic

10,447PHPNOASSERTION

Mautic: Open Source Marketing Automation Software.

Open Core
krita

krita

10,319C++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.

Free
typebot.io

typebot.io

10,313TypeScriptNOASSERTION

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

Open Core
akaunting

akaunting

10,109PHPNOASSERTION

Online Accounting Software

Open Core
invoiceninja

invoiceninja

10,059PHPNOASSERTION

A source-available invoice, quote, project and time-tracking app built with Laravel

Open Core
keystone

keystone

9,969TypeScriptMIT

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

Free
kanboard

kanboard

9,853PHPMIT

Kanban project management software

Free
v2

v2

9,659GoApache-2.0

Minimalist and opinionated feed reader

Free
nhost

nhost

9,287TypeScriptMIT

The Open Source Firebase Alternative with GraphQL.

Freemium
bigbluebutton

bigbluebutton

9,211JavaScriptLGPL-3.0

A complete web conferencing system for virtual classes and more!

Free
heyform

heyform

8,965TypeScriptAGPL-3.0

Open-Source Form Builder

Open Core
core

core

8,828PHPAGPL-3.0

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

Open Core
hedgedoc

hedgedoc

7,399TypeScriptAGPL-3.0

HedgeDoc - Ideas grow better together

Free
app

app

6,621TypeScriptAGPL-3.0

Think fearlessly with end-to-end encrypted notes and files. For issues, visit https://standardnotes.com/forum or https://standardnotes.com/help.

Open Core
gimp

gimp

6,396CNOASSERTION

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

Free
zabbix

zabbix

6,343Go TemplateAGPL-3.0

Real-time monitoring of IT components and services, such as networks, servers, VMs, applications and the cloud.

Open Core
passbolt_api

passbolt_api

6,108PHPAGPL-3.0

Passbolt Community Edition (CE) API. The JSON API for the open source password manager for teams!

Open Core
zammad

zammad

5,892RubyAGPL-3.0

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

Open Core
baserow

baserow

5,827PythonNOASSERTION

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
kdenlive

kdenlive

5,616C++GPL-3.0

Free and open source video editor, based on MLT Framework and KDE Frameworks

Free
vikunja

vikunja

5,297GoAGPL-3.0

The task manager you actually own.

Free
writefreely

writefreely

5,248GoAGPL-3.0

A clean, Markdown-based publishing platform made for writers. Write together and build a community.

Free
rallly

rallly

5,246TypeScriptAGPL-3.0

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

Freemium
freescout

freescout

4,524PHPAGPL-3.0

FreeScout — Free self-hosted omnichannel AI-powered helpdesk & shared mailbox

Free
inkscape

inkscape

3,870

Project Website: https://inkscape.org - Code Repository: https://gitlab.com/inkscape/inkscape - Draw freely. 🖌

Free
discussions

discussions

2,321

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

Free
bugsink

bugsink

2,056PythonNOASSERTION

Self-hosted Error Tracking

Open Core
Implem.Pleasanter

Implem.Pleasanter

677C#AGPL-3.0

Pleasanter is a no-code/low-code development platform that runs on .NET. You can quickly create business applications with simple operations.

Open Core
taiga

taiga

568PythonMPL-2.0

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

Freemium
exment

exment

280PHPGPL-3.0

Exment is open source software for managing information assets on the Web. / Exmentは、情報資産をWeb上で管理するための、オープンソースソフトウェアです。

Free

Browse by Category

Project Management
Project management tools supporting both agile and waterfall methodologies with task tracking, sprint planning, backlog management, and Gantt charts. Self-hosted alternatives to Jira and Linear for engineering teams.
Communication
Communication platforms integrating team chat, messaging, and video calls. Self-hosted alternatives to Slack and Discord that provide full message control and privacy through on-premises deployment.
CRM & Sales
CRM platforms for customer relationship management, sales pipelines, lead tracking, and deal management. Alternatives to Salesforce enabling small and mid-size businesses to manage sales with modern UIs at lower cost.
Design
Design tools for UI design, prototyping, diagramming, and whiteboarding. Alternatives to Figma with SVG-native output and self-hosting to avoid vendor lock-in on design data.
Analytics
Analytics tools for web traffic analysis, product analytics, and user behavior tracking. Alternatives to Google Analytics achieving GDPR compliance without cookies while ensuring complete data ownership.
Cloud Storage
Storage platforms for file sync, sharing, backup, and photo management. Self-hosted alternatives to Dropbox and Google Drive for managing storage capacity and ensuring data privacy on your own infrastructure.
CMS & Blogging
Content management, blogging, and headless CMS platforms. Alternatives to WordPress featuring API-driven modern content management, as well as publishing platforms with built-in newsletter and subscription billing capabilities.
Database
Backend platforms, no-code databases, and Backend as a Service (BaaS). Alternatives to Firebase and Airtable with PostgreSQL-based relational databases and no-code UIs on top of existing databases.
Developer Tools
Developer tools for Git repository management, API testing, secret management, and data labeling. Self-hosted alternatives to GitHub and Postman for managing source code and credentials on your own infrastructure.
Automation
iPaaS platforms for workflow automation, API integration, and AI agent building. Alternatives to Zapier with no per-task pricing for business process automation, including tools supporting AI and LLM workflow integration.
Email Marketing
Platforms for email marketing, newsletter delivery, and marketing automation. Self-hosted alternatives to Mailchimp enabling fixed-cost email delivery regardless of subscriber count.
Video Conferencing
Platforms for video conferencing, online education, and real-time communication. Alternatives to Zoom with self-hosted call data privacy, education-specialized features, and developer SDKs for embedding video capabilities.
Knowledge Base
Knowledge sharing platforms including wikis, document management, and note-taking apps. Alternatives to Notion and Confluence with Markdown-based fast editors and Git-integrated version control.
Photo Editing
Creative tools for image editing, RAW processing, and digital painting. Alternatives to Adobe Photoshop with professional-quality layer editing, filters, color management, and scripting capabilities.
Hosting & Deployment
Application deployment, container management, and PaaS platforms. Self-hosted alternatives to Vercel and Heroku providing git push deployment, one-click app launching, and automatic SSL on your own VPS infrastructure.
AI & LLM
Tools for running large language models locally, AI chat interfaces, and AI workflow construction. Alternatives to ChatGPT for operating AI capabilities on your own infrastructure while ensuring data privacy.
Low-Code
No-code and low-code platforms for application building, internal tool development, and business system development. Alternatives to Retool and kintone for building business applications with drag-and-drop and GUI interfaces.
Accounting & Invoicing
Business tools for accounting, invoicing, expense management, and ERP. Alternatives to freee and QuickBooks for managing financial data on self-hosted open source accounting platforms.
Media Management
Platforms for video streaming, media servers, and content delivery. Alternatives to Plex and YouTube for managing and streaming video and music libraries on your own server.
Social & Community
Decentralized social networks and community platforms. Alternatives to Twitter/X and Reddit for building communities with data sovereignty through federation technology.
Document Management
Document management systems for digitization, classification, and search. Self-hosted tools for digitizing paper documents with OCR-powered full-text search.
Video Editing
Creative tools for video editing, color grading, and effects processing. Alternatives to Adobe Premiere for professional video production at no cost.

Browse by SaaS Alternative

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.