Each page states when the other product is the better fit, and when a shared document layer for people and agents matters more. The comparisons below cover Notion, Obsidian, Outline, GitBook, AFFiNE, Google Docs, Confluence, and HackMD.
Choose Notion for the broadest mature workspace of databases, templates, automations, and integrations. Choose Doco when open-source self-hosting and version-protected block edits by external agents matter more than an all-in-one workspace.
Choose Obsidian for a private local Markdown vault, linked thinking, and a large plugin ecosystem. Choose Doco when multiple people and agents must share one live, permissioned document state and perform version-protected block writes.
Choose Outline for a polished, mature team wiki with strong administration and integrations. Choose Doco when MIT licensing and an agent-facing block contract with stable IDs, If-Match, atomic batches, and Markdown round-trip are decisive.
Choose GitBook for polished public product documentation, Git Sync, built-in AI discovery, and a read-only MCP endpoint for every published site. Choose Doco when humans and external agents must co-edit internal documents through protected write APIs.
Choose AFFiNE for a local-first workspace that combines documents, databases, and a visual canvas. Choose Doco for a simpler MIT-licensed document system whose defining feature is safe, version-protected editing by external agents.
Choose Google Docs for familiar office collaboration, suggestions, comments, and Workspace governance. Choose Doco when MIT self-hosting, stable block IDs, and a Markdown-first CLI/REST/MCP contract matter. Google also offers first-party MCP and revision-checked agent writes.
Choose Confluence for a mature enterprise wiki with spaces, permissions, and Jira integration. Choose Doco for an agent-native shared docs workspace with stable block IDs and a Markdown-first CLI/REST/MCP contract. Confluence already offers official read/write access through Atlassian’s cloud-hosted Rovo MCP Server.
Choose HackMD for real-time collaborative Markdown, team workspaces, and publishing notes as web pages, slide decks, or books. Choose Doco for agent-native shared documents with stable block IDs and protected structured edits. HackMD also offers an official hosted MCP server with OAuth sign-in.