Mem.ai
Note-taking with no folders; AI-chat over notes. Focused on connections between notes rather than hierarchy.
At a glance
- Type
- AI-first note-taking
- Tier
- T2
- Created
- 2017 (first funding Apr 2021)
- Latest release
- not applicable — not OSS
- License
- not applicable — not OSS
- GitHub
- not applicable — no GitHub repo
- Pricing
- Free + paid
- Funding
- $24M $110M val Venture · 2022-11
Taxonomy
- storage
- vector
- retrieval
- similarity
- persistence
- long-term
- update
- overwrite
- unit
- document
- governance
- user-controllable
- conflict
- none
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
Auto-organized timeline memory with proactive surfacing; clean iOS / Mac experience.
Cons
Closed system; smaller user base; product direction has shifted multiple times.
Claims & capabilities
$28.6M total funding over 2 rounds; latest $23M Series A (Nov 2022) led by OpenAI Startup Fund. Note: distinct from Mem0 (memory infrastructure for AI apps; raised $24M from YC/PeakXV/Basis Set in October 2025 — different company)
Technical surface
- API surface
- searched not found
- Backend storage
- custom
- Deployment
- Managed-only
- Embedding model
- locked
- Multi-tenancy
- hard-isolation
- MCP
- searched not found
- A2A
- searched not found
- OpenTelemetry
- searched not found
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Other personal ai / pkm / lifelogging memory in the catalog, ranked by inbound references.
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