The Complete Tana Guide — How AI Outline Notes Replace Notion and Roam

Reviewed and verified by FeiYueh · Last verified 2026-07-15

The most fundamental difference between Tana and Notion, Roam Research is that it upgrades the humble "tag" into a portable, structured field-carrying data type

The most fundamental difference between Tana and Notion, Roam Research is that it upgrades the humble "tag" into a portable, structured field-carrying data type (the Supertag), turning a freely written outline node into a queryable database record the very second it's tagged. This solves the dilemma of Notion ("you must build a table before you can enter data") and Roam ("bidirectional links but no field structure")—you write your outline as usual, and the structure grows on its own. Supertag: The Core Mechanism Behind Tana Replacing Notion and Roam The design principle of the Supertag comes from the "class" concept in object-oriented programming. In Tana, once any outline node is tagged with #meeting , it automatically inherits the fields that tag defines in advance—date, attendees, action items—and immediately appears in every aggregated view of all #meeting entries. You don't need to first open a Database, set up Properties, and then add rows one by one like in Notion. The difference from Roam Research is equally clear. Roam builds a relational web between notes using [[bidirectional links]] , but the links themselves carry no fields and cannot directly produce a structured query like "all projects with status In Progress." A Tana node is both an outline item and a database record, possessing Roam's connectedness and Notion's structure at the same time. In practice, this changes the order of input. Traditional tools follow "decide the structure first, then fill in the content"; Tana follows "jot down the content quickly first, then grant it structure with tags afterward," which is closer to the rhythm of how the human brain captures ideas on the fly. Market Positioning and Scale Gap Among the Three Tools Notion is the largest and most mature general-purpose workspace of the three. As of 2024, "Notion surpassed 100 million users at a valuation of US$10 billion" (Source: TechCrunch) , and has accumulated over 4 million paying customers. Its strengths are its templa

Reviewed and verified by FeiYueh · Last verified 2026-07-15. Independently maintained — not AI-generated boilerplate.