Proton is a privacy-led suite. Microsoft 365 is an enterprise operating system with email attached.
The decision is whether desktop Office, identity, Teams, SharePoint and compliance depth justify the complexity and data footprint.
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Choose Proton: the team is relatively simple and privacy-led consolidation matters more than enterprise breadth.
Choose Microsoft 365: Office, Entra, Teams, SharePoint, device management or compliance are operational requirements.
| Area | Proton | Microsoft 365 |
|---|---|---|
| Model | Smaller encrypted suite. | Broad productivity, identity and governance platform. |
| Documents | Private web tools. | Deep desktop and web Office compatibility. |
| Administration | Less sprawling. | Powerful, granular and capable of becoming a profession. |
| Privacy | Provider-access minimisation is central. | Strong controls, different privacy architecture. |
Do not confuse encryption with operation
Microsoft can be operated securely. Proton can be operated badly. Neither fixes shared passwords, unmanaged devices or a domain account owned by a departed contractor.
Last reviewed 19 July 2026. Verify current plans, limits and migration terms directly with the provider.
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