Apps tagged with 'second-brain'

All apps in Apps tagged with 'second-brain' category. Use the filters below to narrow down your search. 
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  1. OwnSpace icon
     3 likes

    Private, local-first knowledge storage for notes, documents, and projects. Offline access, Markdown support, fast search, and PARA organization method included.

    Cost / License

    • Free
    • Proprietary

    Application type

    Platforms

    • Online
    OwnSpace screenshot 1
    OwnSpace screenshot 1
    OwnSpace screenshot 2
    14 alternatives
  2. DANO icon
     1 like

    DANO is not another productivity app. It’s a digital mirror of your life — a single, connected space where everything you track lives together and nothing stays isolated.

    Cost / License

    • Free
    • Open Source (MIT)

    Platforms

    • Mac
    • Windows
    • Linux
    7 alternatives
  3. zk icon
     1 like

    zk is a plain text note-taking assistant meant for use alongside a separate text editor program.

    Cost / License

    Platforms

    • Mac
    • Linux
    zk screenshot 1
    27 alternatives
  4. Dim0 icon
     2 likes

    An open-source AI canvas where you think and research visually - notes, diagrams, code, and an AI agent that builds directly on the board.

    Cost / License

    • Freemium
    • Open Source (MIT)

    Platforms

    • Online
    A Dim0 rich-text note explaining attention mechanisms, 
showing the scaled dot-product attention formula with 
math notation, numbered computation steps, and sections 
on Self-Attention vs Cross-Attention. ML mindmap visible 
in the background.
    Dim0's landing page hero section showing the tagline 
"Your canvas thinks back." with the subtitle "Research 
visually. Think spatially. Build with AI." and the 
handwritten line "Your thoughts deserve more than a chat 
window." Below is the AI agent input bar with an example 
prompt "Why do we dream, i..." powered by Claude Sonnet 4.5.
    A Dim0 canvas titled "Machine Learning Mindmap" showing 
an AI-generated mind map with a central node explaining 
Machine Learning, connected to five color-coded nodes: 
Key Concepts, Supervised Learning, Unsupervised Learning, 
Reinforcement Learning, and Common Applications. The agent 
panel shows 11 steps completed.
    +2
    A four-node horizontal flow diagram on a Dim0 canvas 
explaining DeepSeek's Visual Primitives: The Core Idea 
(green) ? The Old Way with Text CoT and its problems 
(pink) ? The New Way with direct spatial markers (orange) 
? Results showing smaller models matching GPT-5.4 and 
Claude Sonnet 4.6 (light orange).
    8 alternatives
  5. Harbor is a private, cross-platform second brain for everything you want to keep for life: notes, scanned mail and documents, PDFs, receipts, web clips, photos, and meeting recordings.

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Mac
    • Windows
    • Android
    • iPhone
    • iPad
    • Online
    Harbor Notes screenshot 1
    Harbor Notes screenshot 1
    Harbor Notes screenshot 2
    +1
    Harbor Notes screenshot 3
    9 alternatives
  6. BuddyPro icon
     Like

    BuddyPro is a platform where experts and coaches can build their own white-labelled relationship-based AI coach from their know-how and sell it to their audience as a $1-2K / year digital product. AI digital twins built on BuddyPro maintain up to 60% daily and 80% weekly active...

    Cost / License

    • Paid
    • Proprietary

    Platforms

    • Online
    • Software as a Service (SaaS)
    AI digital twin from know-how
    5 alternatives
  7. All-in-one life organizer combining journal, planner, notes, habits, and goals in one interconnected system. Mobile-first, offline-first, with optional E2E encryption.

    Cost / License

    • Freemium
    • Proprietary

    Platforms

    • Mac
    • Android
    • iPhone
    • Android Tablet
    • iPad
    • Online
    Journal it! screenshot 1
    Journal it! screenshot 1
    Journal it! screenshot 2
    +15
    Journal it! screenshot 3
    54 alternatives
  8. Brainfo icon
     Like

    Brainfo is an all-in-one, AI-native second brain that brings Notes, Docs, Bookmarks, Databases, Tasks, and Goals together with a built-in multi-model AI Chat Hub — so you can capture, organize, write, plan, and execute in one place instead of juggling a notes app, a docs editor...

    Cost / License

    • Freemium
    • Proprietary

    Platforms

    • Online
    • Software as a Service (SaaS)
    Brainfo screenshot 1
    Brainfo screenshot 1
    Brainfo screenshot 2
    +8
    Brainfo screenshot 3
    5 alternatives
  9. Hjarni icon
     Like

    The knowledge base for ChatGPT and Claude. Save notes once, connect via MCP, stop re-explaining context every conversation.

    Cost / License

    • Freemium
    • Proprietary

    Application type

    Platforms

    • Online
    • Software as a Service (SaaS)
    Hjarni screenshot 1
    Hjarni screenshot 1
    Hjarni screenshot 2
    +4
    Hjarni screenshot 3
    16 alternatives