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Mantle vs Mem

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors. Mem publishes a starting price ($12); Mantle does not. Both have a free tier. Both ship a public API.

MantleSelf-hosted AI assistant with persistent memory that ingests email, files, and calendars, free to run yourself.MemNotes app with an agent that files captures, tracks commitments and briefs you before meetings

Side by side

FactMantleMem
CategoryPersonal AI AssistantsNote-taking & Second Brain
Pricing modelFreeFreemium
Starts at—$12 month
Public APIYesYes
PlatformsWeb, iOS, APIWeb, macOS, Windows, iOS
CompanyCross Works Engineering (Pty) Ltd—
Last verifiedSep 1, 2026Sep 6, 2026

What our research says

Mantle

Mantle suits someone who wants an AI assistant with real memory but doesn't want their email and files sitting in someone else's cloud. Running it yourself via Docker means you're responsible for the infrastructure, and the free license has real restrictions once you'd be competing with Mantle commercially.

Pros

  • Self-hosted, so data stays on infrastructure the user controls
  • Reported running cost under $5/month with local embeddings
  • Reaches users through web, iOS, Telegram, and an API with MCP support
  • Free source-available license for non-competing use

Cons

  • Requires Docker and some technical setup, not a sign-up-and-go product
  • Free license has real limits: commercial or competing use needs a paid license
  • No evidence of a hosted/managed option for non-technical users

Mem

Mem has moved past 'self-organizing notes' into an agent that actually nags you about commitments, which is the part most note apps never deliver. The catch is the ladder: the free tier is tiny, the useful proactive behavior is fenced into a $99/month plan, and sign-in is currently Google-only.

Pros

  • Agent tracks tasks and commitments across notes, not just search
  • Native apps on web, Mac, Windows and iOS with voice capture
  • Pro at $12/month includes API and email-in access
  • Proactive tier reaches you on Slack, iMessage and WhatsApp

Cons

  • Free plan (25 notes/month) is too small to evaluate the agent seriously
  • The headline proactive features cost $99/month
  • Google-only authentication; no Android app listed

Which one fits

Choose Mantle if you need

  • Privacy-conscious users willing to self-host with Docker
  • People who want one assistant with memory across email, files, and calendar rather than separate tools

Choose Mem if you need

  • Founders and consultants juggling many threads without an assistant
  • People who capture by voice and want automatic filing
  • Users who want reminders pushed into Slack or iMessage rather than another app

More comparisons

Browse all Personal AI Assistants →