AppFlowy

AppFlowy gives you the building blocks of a Notion workspace (docs, wikis, databases, kanban boards, task lists) on infrastructure you control. You can self-host the full stack on your own server, work entirely offline, or use AppFlowy’s hosted cloud. The app runs on macOS, Windows, Linux, iOS, and Android, built on Flutter and Rust.

The AI layer is more configurable than most tools in this category. You can wire it up to cloud models like GPT-5, Gemini 2.5 Pro, and Claude 3.7 Sonnet, or run local AI models such as Mistral 7B and Llama 3 entirely on your own hardware. The Vault Workspace option ensures no AI query data leaves your machine.

Self-hosting uses Docker and is documented step by step, but there is a constraint worth knowing: the self-hosted free tier caps real-time collaboration at two workspace members. For solo use or a pair of collaborators it is fine, but teams beyond that need a paid per-seat plan.

With over 71,000 GitHub stars and continued active development, AppFlowy has strong community backing. Third-party integrations are thinner than Notion’s, and the mobile apps trail the desktop in polish. For a small team that wants a flexible knowledge base and project tracker without a permanent SaaS dependency, it is one of the more complete self-hosted options around.