Beyond Encryption Mailock for M365 is a commercial email encryption tool by Beyond Encryption. PreVeil Email is a commercial email encryption tool by PreVeil. Compare features, ratings, integrations, and community reviews side by side to find the best email encryption fit for your security stack.
CST VerdictBased on our analysis of NIST CSF 2.0 coverage, core features, integrations, company size fit, here is our conclusion:
SMB and mid-market teams standardized on Microsoft 365 should pick Beyond Encryption Mailock for M365 if message revocation is non-negotiable; the ability to recall emails even after a recipient opens them covers the mistake you'll inevitably make sending sensitive data to the wrong person. AES-256 encryption with SMS and Q&A recipient verification handles NIST PR.AA without requiring users to manage separate identity infrastructure. Skip this if your organization needs DLP that catches data before it leaves the network or if you're already enforcing encryption at the gateway level; Mailock layers on top of M365 rather than replacing email security controls.
Compliance officers and security teams in defense contracting, aerospace, and healthcare managing ITAR or CMMC-regulated data need PreVeil Email because it encrypts sensitive messages end-to-end without requiring email infrastructure replacement or asking users to abandon Gmail and Outlook. The tool holds FedRAMP authorization and FIPS 140-3 validation while letting subcontractors access encrypted content for free, eliminating the licensing friction that kills adoption on classified programs. Skip this if your organization needs data loss prevention rules, content inspection, or the ability to revoke sent messages; PreVeil's zero-knowledge architecture means PreVeil itself cannot intercept or unsend encrypted traffic.
AES-256 encrypted email add-on for M365 with auth & revocation.
E2E encrypted email for regulated industries handling CUI and ITAR data.
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Common questions about comparing Beyond Encryption Mailock for M365 vs PreVeil Email for your email encryption needs.
Beyond Encryption Mailock for M365: AES-256 encrypted email add-on for M365 with auth & revocation. built by Beyond Encryption. headquartered in United Kingdom. Core capabilities include AES-256 end-to-end email encryption, Recipient identity verification via SMS, Q&A, or Unipass ID, Message revocation after send (including post-open)..
PreVeil Email: E2E encrypted email for regulated industries handling CUI and ITAR data. built by PreVeil. headquartered in United States. Core capabilities include End-to-end encrypted email with zero-knowledge architecture (PreVeil cannot access user data), Works with existing email addresses without infrastructure changes, Encrypted inbox added to existing email clients (Outlook, Gmail, Apple Mail)..
Both serve the Email Encryption market but differ in approach, feature depth, and target audience.
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