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.
Try searching by description — lightweight password manager for families or alternative to notion for self-hosted notes.
Best FOSS alternatives to popular SaaS products
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Best software by GitHub Stars
OpenClaw
MIT License
362.5k
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
185.2k
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
183.7k
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
169.7k
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
147.8k
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
138.8k
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
133.5k
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
121.7k
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
117.0k
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
hermes-agent
MIT License
111.0k
DevelopersAI & ML PractitionersGenerative AIAI Agents+2
Hermes Agent is a self-improving AI agent with a terminal UI and messaging gateway that can run across CLI and chat platforms.
Multi-User
Details
ComfyUI
GNU General Public License v3.0
109.7k
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
98.4k
DegooglersMedia HoardersPhoto GalleriesCopyleft License+2
High performance self-hosted photo and video management solution.
OfflineMulti-UserDocker
Details