Tana
Tana is an AI knowledge graph and structured outliner best suited to builders, researchers, operators, and heavy note-takers who want flexible node-based thinking instead of plain linear notes. Its strongest differentiators are supertags, graph-native organization, desktop use, and emerging local MCP workflows, but the learning curve is real and today's official web presence is split between the meeting-focused tana.inc front door and the original Tana Outliner product surface.