Notion

Notion is a connected workspace that combines documents, wikis, databases, project management, and AI assistance in a single platform. It provides flexible building blocks that teams can assemble into custom workflows for any use case.

Core features include a rich document editor with slash commands, relational databases with multiple views (table, board, calendar, gallery, list), templates for common workflows, and Notion AI for writing assistance, summarization, and Q&A across workspace content.

Notion differentiates itself with its composable block-based architecture that lets users build anything from simple notes to complex project management systems without rigid structures. The wiki and documentation capabilities make it popular as a company knowledge base.

Available on web, desktop, and mobile, Notion serves individuals on the free tier through enterprise teams with SSO, audit logs, and advanced permissions.