Memos is a lightweight, open-source note-taking and knowledge management platform designed for users who want full control over their data.

It is self-hosted, meaning users run it on their own infrastructure, avoiding reliance on third-party cloud services and ensuring privacy by default.

The platform focuses on fast, frictionless note capture using plain text and Markdown, allowing users to quickly write and organize ideas without complex workflows. Notes are stored locally in a database chosen by the user, and the system supports tagging, attachments, and flexible visibility settings for sharing content.

Memos is built with a high-performance Go backend and a modern React frontend, enabling a responsive and efficient experience even on minimal hardware. It also includes APIs for integration, making it suitable for developers and teams who want to extend or embed it into their workflows.

Positioned as a privacy-first alternative to cloud-based note apps, Memos is widely used for personal knowledge bases, journaling, and lightweight team collaboration without subscription costs or vendor lock-in.

Key features include:

• Self-hosted architecture with full data ownership
• Markdown-native note creation with instant saving
• Tag-based organization and search
• API support for integrations and automation
• Lightweight, high-performance design
• Flexible visibility and sharing options

Common use cases include:

• Personal note-taking and journaling
• Building a private knowledge base
• Managing tasks or quick ideas
• Creating team wikis
• Running a self-hosted alternative to tools like Notion or Evernote