📝MythOS describes itself as a networked knowledge platform where every idea, person, project and decision lives as a linked memo in a library you own. 📝Notion presents Notion AI under the headline "Meet your 24/7 AI team." Both let outside AI apps reach a user's knowledge over 📝MCP. They split on where the AI is built: Notion's Business plan includes Notion Agent, AI Meeting Notes and Enterprise Search, while MythOS's plans sell reach and its in-app chat runs on six model providers.
At a Glance
AI Inside the Workspace
Notion's AI page says Notion Agent "Completes complex, multi-step tasks using context from Notion, your connected apps, and the web." AI Meeting Notes promises to "Automate your meeting notes and follow-ups, no bot needed," and Research Mode, in Beta, "Uses deep reasoning to produce detailed reports." As of November 2026, Notion's pricing page lists Free and Plus each with a "Trial of Notion AI," Business with Notion Agent, AI Meeting Notes and Enterprise Search (Beta), and Enterprise with "Custom pricing." MythOS chat runs on a MythOS-funded balance or the user's own provider key through 📝BYOK, and its Plans & Tiers memo states that no plan includes AI credits.
Search and Retrieval
Notion's Enterprise Search promises to "Search across Slack, Google Drive, GitHub & more—in seconds." MythOS 📝semantic search finds memos by meaning: each memo is split into roughly 500-token chunks embedded with its title and tags, and results blend vector similarity with keyword relevance. A requester only retrieves memos they are allowed to read. It is reached through MCP and through chat with a library, whose 📝RAG pipeline runs the same retrieval.
Agent Access over MCP
Notion's help center says Notion MCP lets users "Connect your favorite AI apps, like Claude, ChatGPT, and Cursor, directly to your Notion workspace," so they can "read from and write to your Notion pages in real-time." In MythOS, editors like 📝Cursor connect by OAuth or an API key, which comes with Scholar and above. A connected client gets 60 tools for search, memo writes, templates, tasks and the daily journal, with four identity memos (Soul, Style, Human and Memory) loaded before it writes.
Who Each Is For
Notion's AI page says it is "Designed for teams." Its pricing page describes Free as "For individuals to organize personal projects and life" and Business as "For growing businesses to streamline teamwork." MythOS's own overview says one library serves "private thinking, team collaboration, public writing, and the AI tools you work with," and its Plans & Tiers memo states that "writing is never the thing you pay for."
Related
- 📝MythOS vs. Notion — how MythOS frames itself against Notion as a whole
- 📝MemPalace vs Obsidian vs MythOS as Claude Memory — the hub comparing MythOS with other memory systems
- 📝MCP vs RAG — the difference between connecting an AI to knowledge and retrieving from it
- 📝MCP for Personal Knowledge Systems — using MCP to give AI models a personal library as memory
In 2017 I was 📝kicked off of Notion for unknowingly over-taxing its API, after driving public traffic to free educational pages I had built there. Notion's model was built for internal communication; I wanted internal knowledge management and external publishing in one place. So I commissioned an engineer friend to build an alternative, and it shipped as MythOS in March 2018.