Agenda vs Outline

Agenda is a date-focused note-taking application for macOS, iOS, and iPadOS developed by Momenta B.V. It organizes notes along a timeline linked to calendar events, combining note-taking with scheduling and task management. The app syncs via iCloud or Dropbox and supports rich text, attachments, tags, and collaboration.

Outline is Open-source team wiki and knowledge base with markdown editing, nested documents, and Slack integration.. It is available under a freemium model. This tool falls under the note taking category.