Tana is a next-generation knowledge and task tool built around supertags — typed objects with structured properties that turn an outliner into a semantic database. Launched in 2023, Tana attracted a devoted power-user community who saw it as the most intellectually rigorous approach to task and knowledge management. Tasks in Tana are first-class objects with due dates, assignees, projects, and custom fields — all queryable with Tana's powerful search and filter system. Its AI commands are integrated at the node level, enabling AI-powered task generation anywhere in the workspace.

Reference:

Tana on Wikipedia

https://tana.inc