Proton Workspace is an unconventional pick for a team collaboration guide, but it earns its place for a specific buyer: the small business that needs foundational digital infrastructure: email, file storage, docs, video calls— and wants it locked down from the start.

What sets Proton apart from every other tool on this list is its encryption architecture. Unlike Google Workspace or Microsoft 365, where the provider can technically access your data, Proton uses zero-knowledge encryption; meaning the company itself cannot read your emails, files, or documents. For HR teams handling sensitive employee data, legal documents, or compensation details, that’s a meaningful differentiator, not just a marketing claim. The platform is ISO 27001 certified and SOC 2 Type II audited, which simplifies compliance with HIPAA, GDPR, and CCPA.

We explored the Workspace Standard plan, which covers Mail, Calendar, Drive (with Docs and Sheets), Meet, VPN, and Pass at $12.99/user/month. Compared to piecing together a Google Workspace subscription, a standalone VPN, and a team password manager, the bundled cost comes out lower. Proton has also never raised prices on existing customers; a rarity in SaaS.

That said, feedback from business users we consulted consistently flags the same limitation: integrations. One cybersecurity consultant who ran their company on Proton for over a year noted that calendars won’t sync with tools like Teams or Salesforce, and that non-technical employees struggled with the workarounds. If your team lives in a SaaS stack— CRM, project management, shared calendars across platforms— Proton might create friction. Docs and Sheets, while functional for basic use, also lack the depth of Google’s equivalents. Other reviewers echo this: they praise the encryption and reliability but note the ecosystem is still maturing.

Proton Workspace works best for small, privacy-conscious teams. Think legal practices, healthcare consultancies, financial advisors, nonprofits, or early-stage startups where email, file sharing, and video calls cover 90% of collaboration needs.