Question: I need a solution that enables multiple users to work on documents together with version history and inline comments.

Bit.ai is a full-featured document collaboration tool with advanced styling, powerful search and document analytics. It's designed for real-time collaboration with multiple collaborators and guests, and has features like interactive living documents, AI-powered writing and inline commenting. Bit.ai also has strong tracking abilities, so it's a good option for secure, high-productivity document collaboration.

Another option is Coda, an all-purpose collaborative workspace that combines the abilities of documents, spreadsheets and apps. Coda has Writeups for collaborative decision making, Hubs for centralized information and Trackers for integrated spreadsheets. Its AI technology can provide quick answers and automate processes, and it integrates with more than 600 other tools to automate other processes. That makes it a good option for teams in many domains who want to avoid tool sprawl and get more work done.

If you're a developer, Tiptap is a headless content editor and real-time collaboration foundation. It's got features like AI-generated content, version control and a commenting system with inline and document comments. Tiptap is modular and can be used for custom content sites, collaborative platforms and more, and it can be used in the cloud or on your own premises.