Question: I need a solution that allows my team to collaborate on documentation with version control and access restrictions.

For a service that lets your team collaborate on documentation with version control and access controls, GitBook is a top contender. It's designed to bridge the gap between documentation and coding, with features like branch-based workflows, access controls and collaboration tools. It also supports Docs-as-Code editing and management within GitHub or GitLab repositories. With several pricing tiers, including a free option for solo developers, GitBook can accommodate teams of varying sizes and complexity.

Another strong contender is Document360, an AI-powered knowledge base tool geared for technical writers, product owners and customer support teams. It offers features like a knowledge base portal, advanced editor and category manager, along with powerful search and rich analytics. Document360's customizable knowledge base site and automated API documentation generation can help you automate your documentation workflow and increase productivity.

If you want a service that also integrates with other team collaboration tools, check out Docuo. It can be used to create modern documentation sites through Docs-as-Code workflows and integrates with GitHub repositories. Docuo's main features include Git-based version control, multi-instance hosting and SEO metadata, so it's well-suited for developer-focused documentation needs.