Discover the best open-source software you can self-host. We track thousands of projects across GitHub and rank them by stars, activity, and community adoption. Whether you are looking for a replacement for a proprietary SaaS product or exploring new tools, you will find curated options organized by category, license, and popularity.
Best FOSS alternatives to popular SaaS products
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Best software by GitHub Stars
OpenClaw
MIT License
355.0k
Privacy AdvocatesClaws & ClankersAI Agents+2
OpenClaw is a personal AI assistant that runs on your own devices and connects to many messaging channels, voice interfaces, and a live canvas.
Package
Details
n8n
Apache License 2.0, commons-clause
183.6k
DevelopersSmall TeamsAutomation ToolsPermissive License+5
n8n is a workflow automation platform for technical teams that combines no-code workflows with code, integrations, and AI capabilities.
Open CoreOfflineMulti-User
Details
AutoGPT
MIT License
183.3k
DevelopersAI & ML PractitionersArtificial IntelligenceAutomation Tools+4
AutoGPT is a platform for creating, deploying, and managing continuous AI agents that automate complex workflows.
Open CoreMulti-UserDocker
Details
Ollama
MIT License
168.6k
DevelopersAI & ML PractitionersGenerative AIArtificial Intelligence+3
Ollama is a tool for running and managing open models locally and exposing them through a REST API.
OfflineDocker
Details
opencode
MIT License
141.7k
DevelopersVibe CodersArtificial IntelligenceAI Coding Assistant+4
An open source AI coding agent with a terminal-based interface and a desktop app beta.
Docker
Details
Dify.ai
Apache License 2.0, commons-clause
137.3k
DevelopersStartupsLow Code DevelopmentGenerative AI+6
An open-source LLM app development platform for building AI workflows, RAG pipelines, agents, and production-ready AI apps.
Open CoreMulti-UserDocker
Details
Open-WebUI
MIT License
131.3k
AI & ML PractitionersGenerative AIArtificial Intelligence+6
Open WebUI is a self-hosted AI platform for chatting with LLMs, RAG, and related tools, designed to run entirely offline.
Open CoreOfflineMulti-User
Details
Excalidraw
MIT License
120.8k
Content CreatorsDesignersSmall TeamsDiagramming ToolsKnowledge Management
An open source virtual hand-drawn style whiteboard for creating diagrams, wireframes, and sketches.
OfflineMulti-UserPackage
Details
Claude Code
proprietary
112.7k
DevelopersArtificial IntelligenceAI Coding Assistant+5
Claude Code is an agentic coding tool that runs in the terminal and helps with coding tasks, code explanation, and git workflows using natural language commands.
Binary
Details
ComfyUI
GNU General Public License v3.0
108.5k
Content CreatorsAI & ML PractitionersDesignersArtificial IntelligenceAI Media Generation+4
ComfyUI is a graph-based visual engine for designing and running advanced Stable Diffusion workflows.
Open CoreOfflineDocker
Details
Immich
GNU Affero General Public License v3.0
97.6k
DegooglersMedia HoardersPhoto GalleriesCopyleft License+2
High performance self-hosted photo and video management solution.
OfflineMulti-UserDocker
Details
NextChatAI
MIT License
87.7k
DevelopersAI & ML PractitionersSmall TeamsArtificial IntelligenceAI Interfaces+3
NextChat is a lightweight, fast AI assistant web app and desktop client with support for multiple LLM providers and self-hosted models.
Open CoreMulti-UserDocker
Details