Mem.ai
AI-powered note-taking tool that automatically organizes your notes, surfaces relevant information, and helps you write — a second brain that actually works.
Overview
Mem.ai takes the "second brain" concept and adds genuine AI intelligence to it. Instead of forcing you to build elaborate folder hierarchies or tag systems, Mem automatically organizes your notes using AI, surfacing related content when you need it and keeping everything searchable through natural language queries.
The core idea is frictionless capture — dump notes, meeting summaries, ideas, and snippets into Mem and let the AI handle the organization. Its smart search goes beyond keyword matching, understanding the meaning behind your queries to find relevant notes even when the exact words don't match. The built-in AI writing assistant can draft content, summarize notes, and generate action items from your existing knowledge base.
Mem is built for knowledge workers, founders, and researchers who accumulate large volumes of unstructured notes and need a tool that grows smarter as they use it. It's less of a traditional note-taking app and more of an intelligent knowledge layer that sits on top of your thinking.
Key features
Smart Search
Semantic search across all your notes using natural language. Finds relevant content based on meaning, not just keywords — ask questions like 'what did I write about onboarding?' and get precise results.
Auto-Organization
AI-driven organization that automatically tags, links, and surfaces related notes without manual folder structures or tagging systems. Your knowledge base organizes itself over time.
AI Writing
Built-in AI assistant that drafts content, summarizes notes, extracts action items, and generates new material grounded in your existing knowledge base.
Pricing
Free tier: Basic note-taking with limited AI features
| Plan | Price | What's included |
|---|---|---|
| Free | Free | Basic note-taking, limited AI queries, core search |
| Pro | $14.99/mo | Unlimited AI queries, advanced search, priority support |
| Business | Custom | Team collaboration, admin controls, SSO, shared knowledge base |
Basic note-taking, limited AI queries, core search
Unlimited AI queries, advanced search, priority support
Team collaboration, admin controls, SSO, shared knowledge base
Pros & cons
Pros
- ✓Genuinely useful auto-organization removes the burden of manual filing and tagging
- ✓Semantic search finds relevant notes even when you can't remember exact keywords
- ✓Frictionless capture — just write, and the AI handles the rest
- ✓Gets smarter and more useful as your note volume grows
Cons
- ×Less structured than Notion — power users who want databases and views may feel limited
- ×Free tier AI usage is quite restricted, pushing you toward Pro quickly
- ×No offline mode — requires internet connection for core AI features
- ×Smaller ecosystem and fewer integrations compared to established note apps