1. Notion AI
AI trial / $20 Business
by Notion
A shared workspace for notes, wikis, databases, projects, search, writing assistance, and meeting notes. Free and Plus include a limited AI trial; full Notion AI is available on Business and Enterprise plans.
Best for: Teams, wiki + notes + projects in one
Source-verified: pricing · AI documentation
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2. Obsidian
Free / Sync from $4
by Obsidian
A local-file Markdown note app with backlinks, graph views, and a community plugin ecosystem. The core app is free. Obsidian Sync starts at $4 per user/month billed annually or $5 billed monthly. AI features come from third-party plugins, so their data handling must be checked separately.
Best for: Privacy, Markdown, local storage, power users
Source-verified: pricing and privacy · Sync
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3. Mem
Free / Pro $12
by Mem Labs
An AI-native workspace that connects notes, meetings, ideas, and saved context. The limited Free tier includes 25 notes and 25 chat messages per month; Pro is $12/month. The separate Proactive Agent plan is $99/month after a seven-day trial.
Best for: Auto-organization, personal knowledge management
Source-verified: pricing, encryption, and export
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4. Reflect
$10/mo annual
by Reflect Notes
A networked note app with end-to-end encrypted note contents, backlinks, calendar integrations, voice transcription, outlines, and action-item extraction. The public plan is $10/month billed annually with a 14-day trial.
Best for: Daily journaling, encrypted notes, minimalism
Source-verified: product, encryption, and pricing
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5. Apple Notes + Apple Intelligence
Included on supported devices
by Apple
Apple Notes can record audio, show transcripts, and summarize recordings with Apple Intelligence on supported hardware. Many requests can run on device; more complex requests may use Private Cloud Compute, where relevant request data is processed without being retained or made accessible to Apple.
Best for: Eligible Apple users who want OS-integrated notes and recording summaries
Source-verified: Notes features · AI privacy
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6. Google NotebookLM
Standard access · limits apply
by Google
A source-grounded research notebook for PDFs, websites, YouTube, audio, Google files, and other supported sources. Standard access includes inline citations and usage limits, including 100 notebooks, 50 sources per notebook, 50 chats/day, and three audio generations/day at the checked date.
Best for: Research, studying, source-grounded answers
Source-verified: features · limits
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7. Capacities
Free / Pro $11.99 monthly
by Capacities
Object-based note-taking built around typed entities, properties, relationships, and backlinks. Basic is free. Pro includes the opt-in AI assistant and costs $11.99 monthly or $9.99/month billed annually; BYOK is also supported.
Best for: Structured thinkers, relationship mapping, PKM
Source-verified: pricing · AI privacy
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8. Logseq
Free / OSS
by Logseq
An open-source knowledge-management platform with block references and graph workflows. In 2026 Logseq split the file-based Markdown product into Logseq OG while the database product became the main development path. The database version is beta, with mobile and real-time collaboration paths still carrying alpha-stage boundaries.
Best for: Open-source users who can choose deliberately between the OG file path and the newer database path
Source-verified: 2026 product split · official repository
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