ChatGPT SearchOct 13, 2026
For real-time document collaboration with strong security, I’d start with Google Workspace for ease of collaboration and Microsoft 365 for enterprise security and administration. If your top priority is preventing even the service provider from reading your documents, a privacy-first suite such as Proton Workspace deserves a closer look.
The important distinction is that security can mean protecting accounts from hackers, controlling who can access files, meeting compliance requirements, or encrypting documents so the provider itself cannot read them. No single office suite is best at all four.
Best online office suites for security and collaboration
1. Proton Workspace
(Best for privacy)
Proton's key advantage is its zero-knowledge encryption architecture, designed to prevent the provider from reading your protected content. It offers collaborative documents, spreadsheets, email, storage, and calendars.
