AppFlowy

The platform's open-source architecture enables custom extensions, self-hosted deployment, and community-driven development that proprietary platforms cannot match.

The platform's building blocks documents, grids, calendars, and boards can be combined freely within a unified workspace, allowing teams to design workflows that match how they actually work rather than adapting to the constraints of a fixed feature set.

Local-first data storage ensures that the platform works reliably offline and that users maintain genuine ownership of their content without dependence on a vendor's continued operation.

AppFlowy is used by privacy-conscious individuals and organizations, development teams that want to self-host their workspace tools, and communities building on top of the platform's open-source foundation.

Its combination of feature depth, data sovereignty, and extensibility makes it a compelling choice for users who want the capability of platforms like Notion without the data and vendor lock-in concerns that come with proprietary cloud-only alternatives.