Alternatives

Products that do what Second Brain OS does

Your private Second Brain — offline

1. 1
   SECOND BRAIN 2.0▲111

   Get organized, get productive with Second Brain 2.0

   2023

2. 2
   Notion Second Brain▲405

   Organize your entire life with Notion

   2023

3. 3
   Second Brain for Mac and Windows▲247

   Your AI memory, everywhere you work

   Jul 2026 · thesecondbrain.dev

4. 4
   Findr: remember everything▲435

   Unlock infinite digital memory with your (AI) second brain

   2024

5. 5
   Second Brain▲302

   AI visual board and knowledge base

   2025

6. 6
   MindPal▲336

   Dump all your files and chat with them, a real second brain

   2023

7. 7
   TwinMind: AI Second Brain for Mobile▲228

   Remember meetings, lectures, or your entire life for free

   2025

8. 8
   Second Brain for AI▲286

   Persistent memory for Claude, ChatGPT & Cursor. Free.

   May 2026 · github.com

9. 9
   Brainio▲190

   Note taking and mind mapping combined in one app

   2020

10. 10IB
    I built my own second brain software tool▲41

    2021 · joeldare.com

11. 11
    Second Mind▲103

    Organize your work & life and make progress on your goals

    2023

12. 12
    Twos▲619

    Notes, tasks, reminders, events & lists in one simple place

    2023

13. 13
    OwnMind▲3

    Your private, on-device second brain for Mac

    May 2026 · apps.apple.com

14. 14
    Second Brain by Hexact▲9

    Your local AI knowledge base

    Apr 2026 · brain.hexact.io

15. 15
    Supreme Second Brain▲77

    Taking notes was never easier than now

    2022

16. 16
    WeDo▲116

    Planner, tasks & habits.

    2016

17. 17
    Mindly ▲177

    Capture anything in seconds with automatic organization

    2025

18. 18
    myReach▲285

    Your second brain, powered by AI – ChatGPT for your things

    2023

19. 19
    Workflowy 2.0▲176

    Organize your brain

    2018

20. 20
    Productive Compass▲224

    The game-changing second brain & productivity Notion system

    2023

21. 21
    Dump Memory▲128

    We fix your memory

    Jul 2026 · dumpmemory.com

22. 22
    Smart Notes by MindPal▲146

    The working memory for your AI second brain

    2023

23. 23
    The Ultimate Digital Brain▲121

    The ultimate productivity system for digital entrepreneurs

    2023

24. 24
    Solopreneur Second Brain▲66

    A smarter way to organize your business

    2024

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