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.
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Best FOSS alternatives to popular SaaS products
View all 79 alternatives →Browse by Platform
AI & LLM Tools
Browse by Topic
Best software by GitHub Stars
Uptime Kuma
92.0k
Uptime Kuma is an easy-to-use self-hosted monitoring tool for checking service and server uptime.
Status PagesFully FOSSPermissive License+3
Single ContainerFully FOSS
Lobe Chat
83.0k
LobeHub is a self-hostable AI agent platform for organizing, creating, and collaborating with multi-agent workflows.
Artificial IntelligenceAI InterfacesPermissive License+3
6 Containers
AFFiNE
73.2k
AFFiNE is an open-source, local-first workspace for writing, drawing, planning, and knowledge management, positioned as an alternative to Notion and Miro.
Note Taking AppsPermissive LicenseFOSS with Issues+4
4 ContainersFOSS with Issues
AnythingLLM
66.7k
An all-in-one AI application for chatting with documents, building AI agents, and running local or cloud LLM workflows.
Artificial IntelligenceAutomation ToolsSelf Hosting Solutions+7
Single Container
Ollama
182.0k
Ollama is a tool for running open models locally and exposing them through a REST API for apps, agents, and integrations.
Artificial IntelligenceLocal LLMsGenerative Artificial Intelligence Genai+3
Huginn
50.0k
Huginn is a self-hosted automation system for building agents that monitor online events and perform actions on your behalf.
Automation ToolsPermissive LicenseAI Agents+3
4 Containers
Langflow
155.4k
Langflow is a platform for building and deploying AI-powered agents and workflows with a visual builder, API deployment, and MCP server support.
Low Code DevelopmentAutomation ToolsModel Context Protocol+2
11 Containers
Immich
115.4k
High performance self-hosted photo and video management solution.
Photo GalleriesCopyleft LicenseMedia Management+1
4 Containers
Superset
75.0k
A modern, enterprise-ready business intelligence web application for data exploration and visualization.
Analytics ToolsPermissive LicenseDatabase Management+1
10 Containers
Memos
63.5k
Memos is an open-source, self-hosted note-taking tool for quick capture.
Note Taking AppsPermissive LicenseKnowledge Management+2
Single Container
Twenty
57.8k
An open-source CRM for managing customer data, permissions, workflows, emails, and related records.
CRM SystemsSelf Hosting SolutionsAutomation Tools+4
FOSS with Issues
SillyTavern
34.0k
SillyTavern is a locally installed interface for interacting with text generation LLMs, image generation engines, and TTS voice models.
Artificial IntelligenceAI InterfacesCopyleft License+3
Single Container