Tana
Outliner + structured-data hybrid (Roam/Logseq + Notion-database influences). "Supertags" turn freeform nodes into queryable databases; Tana AI invokes on any node to summarise, generate action items, or extract structured fields (e.g. Meeting node with attendees + decisions + follow-ups).
At a glance
- Type
- Supertag-based PKM with AI
- Tier
- T2
- Created
- 2024-05
- Latest release
- not applicable — not OSS
- License
- not applicable — not OSS
- GitHub
- not applicable — no GitHub repo
- Pricing
- Free + paid
- Funding
- $40M total Series B · 2025-02
Taxonomy
- storage
- relational
- retrieval
- graph-traversal
- persistence
- long-term
- update
- overwrite
- unit
- fact
- governance
- user-controllable
- conflict
- overwrite
When to use
Optimised for: personal-knowledge-management UX + AI-augmented note-taking
Anti-fit: not for enterprise / programmatic use; not for compliance-regulated workloads
Pros & cons
Pros
Supertag + node graph model gives Tana a structurally richer memory substrate than flat-file notes.
Cons
Steep learning curve; smaller user base than Notion / Obsidian; closed system.
Claims & capabilities
Released end-September 2022 (vs Logseq/Obsidian who preceded by 2+ years); rapid PKM-community adoption with vocal advocate base + steady migration from Notion / Roam / Logseq / Obsidian; supernode-based outliner with first-class AI integration; primarily desktop / web
Technical surface
- API surface
- REST (input API)
- Backend storage
- custom
- Deployment
- Managed-only
- Embedding model
- locked
- Multi-tenancy
- hard-isolation
- MCP
- searched not found
- A2A
- searched not found
- OpenTelemetry
- no — consumer product
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Other personal ai / pkm / lifelogging memory in the catalog, ranked by inbound references.
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