Mantle

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About Mantle

Mantle is a self-hosted memory system designed to provide AI assistants with persistent, structured knowledge that persists across sessions. It continuously ingests data from emails, files, notes, conversations, contacts, calendars, and other sources to build a unified memory that the user owns and controls. The system operates in the background, processing information without requiring explicit user prompts, and can surface relevant insights or send automated briefings. It supports personal use cases such as managing emails, tracking receipts, and generating morning briefings, as well as professional scenarios like monitoring shared mailboxes and retrieving specific clauses or quotes. Mantle is built with a layered memory architecture that includes persona, recent turns, digests, profile facts, content index, and a content store, enabling lossless recall and structured knowledge representation. The system emphasizes safety by treating ingested data as read-only content, preventing autonomous agents from executing malicious instructions.

Key features

  • Multi-source data ingestion (email, files, notes, conversations, contacts, calendar)
  • Layered memory system (persona, recent turns, digests, profile facts, content index, content store)
  • Background processing and autonomous operation
  • Team access via tokens with audited interactions
  • MCP and API support for integration with AI assistants
  • Agent Studio for building and editing agent graphs
  • Mini-app creation for team sharing
  • Durable backend for uninterrupted task execution

Use cases

  • Personal knowledge management with automated briefings
  • Team collaboration with shared memory access
  • Specialized departmental memory systems for legal or engineering teams

Pros

  • Self-hosted and open-source
  • Continuous background ingestion and processing
  • Structured memory with lossless recall
  • Supports multiple data sources (emails, files, notes, etc.)
  • Team access via tokens without requiring accounts

Cons

  • Requires self-hosting on user hardware
  • No explicit mention of mobile app availability
  • Limited to systems where MCP is supported

Frequently asked questions about Mantle

What is Mantle and what does it do?

Mantle is a self-hosted memory system that builds a unified, structured knowledge base from emails, files, notes, conversations, contacts, calendars, and other sources. It operates in the background, processing information continuously to provide persistent, lossless recall for AI assistants without requiring explicit user prompts.

Who is Mantle designed for?

Mantle is designed for both personal and professional use. Individuals can use it to manage emails, track receipts, and receive automated briefings, while teams can deploy it to monitor shared mailboxes, retrieve specific information, or delegate queries across specialized departments.

How does Mantle ensure data safety and privacy?

Mantle treats all ingested data as read-only content, preventing autonomous agents from executing malicious instructions. It runs on user-owned hardware, giving users full control over their data and access permissions.

Can Mantle integrate with other tools or platforms?

Yes, Mantle supports integrations with email platforms like Microsoft 365, file systems such as SharePoint, and communication tools like Telegram. It also offers an MCP interface with 149 tools for search, graph, pages, tables, files, email, and tool authoring.

How does Mantle handle memory and recall?

Mantle uses a layered memory architecture that includes persona, recent turns, digests, profile facts, content index, and a content store. This structure enables lossless recall and structured knowledge representation, allowing AI assistants to retrieve precise information efficiently.

What is the MCP interface in Mantle?

The MCP interface in Mantle allows AI assistants to interact with the memory system using 149 tools for tasks like search, graph operations, and file management. It also includes a built-in API console for exploring and executing calls, enabling seamless integration with other systems.

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