Question: I'm looking for a document sharing platform that provides granular access controls and in-depth analytics.

If you're looking for a document collaboration tool with fine-grained access controls and in-depth analytics, Papermark is a good option. It's a secure and customizable way to share documents with real-time analytics. Pricing starts at free and goes up to €149, depending on your needs for advanced access controls, AI-powered chat and self-hosting.

Box is another powerful option, with advanced security controls, intelligent threat detection and full information governance. It's designed for secure collaboration, with native e-signatures and AI-powered insights to help teams get more done. It's good for businesses of all sizes, and a good option for marketing, sales, HR, finance and engineering teams.

For real-time collaboration and advanced document tracking, Bit.ai is also worth a look. It's got AI-powered collaboration, interactive living documents and powerful tracking abilities. It's designed for multiple users and guests, with a variety of sharing options including trackable links and password protection.

If you need a service you can count on to be secure, Dropbox offers protected file storage with version history, password protection and real-time document analytics. It also offers PDF editing, video tools for feedback and automated workflows with eSignature templates. Pricing starts at $9.99 per month, so it's a relatively affordable option for collaboration and data protection.