Notion vs SecondBrain

Notion is a cloud workspace for organising personal projects and coordinating work. Its pages, blocks, and databases support note sharing and real-time collaboration, and offline access is available. It runs on the web, Windows, macOS, iOS, and Android, with a Chrome extension also listed. Connections include Slack, Google Drive, Figma, GitHub, Zoom, and Microsoft Teams. Notion supports semantic search, AI search or answers, and version history. The Free plan costs $0 per member per month and includes trial AI capabilities and a trial of Notion AI. Free uploads are limited to 5 MB per file, multi-member Free workspaces have a limited number of blocks, and external guests are limited to 10. Plus costs $10 per member per month, and Business costs $20 per member per month; yearly payment saves up to 20%. Paid plans list unlimited guests. Notion says data is encrypted and private, and that Notion AI does not use customer data to train models unless users opt in. Enterprise workspaces get zero data retention with LLM providers.

SecondBrain turns spoken thoughts, typed notes and content shared from other apps into organized notes, calendar events and reminders. Its AI transcribes, titles and files notes into a folder tree that builds as material is added. Mentioning a date can create an event and reminder, and the app provides a daily morning briefing. Full-text search and an interactive 3D graph help users find notes and explore connections. A shared-memory connector using MCP supports assistants including Claude, ChatGPT, Gemini, Cursor and Claude Code. The connector requires Pro, and connecting ChatGPT also requires Developer mode, which the maker says is available on Plus or above. The maker says notes and calendar events are stored in an EU-hosted Supabase PostgreSQL database with per-account Row-Level Security; voice and text go through Google Gemini's paid API tier, which it says does not train on content. The free plan has limited notes. Pro is $8.99 a month or $34.99 a year; the App Store also lists a second yearly price of 44.99 USD.