Microsoft Purview classifies and labels content across Microsoft 365 — useful work, but it doesn't prevent Microsoft from being able to read the content. SendSafely encrypts on the sender's device with a split-key architecture, so even SendSafely can't read what you've sent. The two pair, they don't compete.
A side-by-side picture of what Microsoft Purview is built for, and where SendSafely is built differently.
Each row reflects how the two products approach the same problem. Both companies maintain their own certifications and audit programs — consult each vendor's public documentation for current capabilities.
| Feature | SendSafely | Microsoft Purview |
|---|---|---|
| End-to-end client-side encryption | Yes — OpenPGP, every file | Server-side; Microsoft holds and manages keys |
| Split-key architecture (no admin path) | Yes | Microsoft and tenant admins have access |
| External recipient experience | Link + identity verification, no account required | Azure AD federation or guest account required |
| Cross-platform reach | Outlook, Gmail, Zendesk, Salesforce, Intercom, Freshdesk, REST API | Optimized for Microsoft 365 |
| HIPAA BAA | On Business and Enterprise plans | Available within Microsoft's compliance framework |
| Audit log API | REST endpoint, JSON records, every event | Comprehensive within Microsoft 365 audit |
Comparative claims reflect publicly documented behavior of Microsoft Purview as of the page's last update. Microsoft Purview maintains its own product roadmap; consult their documentation for current capabilities.
Microsoft Purview's encryption is server-side and managed by Microsoft. SendSafely encrypts client-side with OpenPGP, and the decryption key is split — Microsoft, SendSafely, and any vendor in the path see ciphertext only.
Recipients verify identity (email, SMS, SSO) before SendSafely releases the half of the key it holds. Microsoft Purview controls access through Azure AD — that works for in-tenant users but is heavier for external recipients.
Outlook plug-in, Gmail extension, Zendesk app, Salesforce app, Intercom app, Freshdesk app — SendSafely encrypts files regardless of which surface they originate from.
Teams using Microsoft Purview for in-tenant data governance typically add SendSafely for the workflows where the file leaves Microsoft 365 entirely — outside counsel, regulated counterparties, support customers — and the encryption needs to survive on platforms Microsoft doesn't control.
Purview keeps classifying inside Microsoft 365 while SendSafely handles what leaves it — compliance file exchange outbound, and the Outlook plug-in on the desks that send it. All In Credit Union works this way under GLBA and NIST 800-53.
Every file is encrypted on the sender's device using OpenPGP. SendSafely sees ciphertext only — the decryption key is split so nobody, not even SendSafely, can read the contents on its own.
Audited annually. SendSafely maintains the certifications regulated industries require.
Real product demo, real questions, no slideware. Bring your toughest Microsoft Purview edge case and we'll walk through the SendSafely architecture against it.