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Microsoft Loop vs Outline: catalog facts
Microsoft Loop	Outline
Freemium Available to get started with a Microsoft account, with paid Microsoft 365 plans adding…	Freemium Hosted plans are paid. Self-hosting is possible under the source-available Business Source…
Web	Web, Self-hosted
Live components that sync across Microsoft 365 apps Page templates and a quick insert menu	Fast collaborative editor with slash commands and nested collections
Tied to Microsoft accounts and the Microsoft 365 ecosystem Copilot features depend on Microsoft 365 plans	Source-available under the Business Source License, not open source The hosted plan is paid and self-hosting needs Postgres, Redis and object storage
Web application	Self-hosted, Web application, Hosted service
Closed source	Closed source
License not stated	License not stated
Account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.