Mailvelope vs Mimecast Secure Messaging

Mailvelope adds client-side end-to-end PGP encryption to supported webmail. Its browser add-on works with Gmail, Outlook, WEB.DE, and other webmailers, and can encrypt or decrypt attachments within email, including with PGP/MIME. While composing, it can detect a recipient’s public key; signature mismatches can help identify phishing attempts. Users can export keys, manage multiple keyrings, and use Mailvelope or other key servers. The free private-user offering is independent from Google, but lacks PGP/MIME, Google Workspace integration, and customer service. Mailvelope states that it complies with GDPR and EU privacy laws. Business plans include a 14-day free trial without payment data. Monthly billing costs €3 per user per month; annual billing costs €32.40 per user per year. Paid subscriptions auto-renew and can be cancelled anytime. Business integrations include professional or premium email support options. Mailvelope is available as an extension and through the web.

Mimecast Secure Messaging helps organizations protect sensitive information sent by email, including financial records and customer data. It sends protected messages through a secure web portal; Mimecast says the information stays in its cloud. Senders can set read receipts and expiry dates, and restrict printing or replies. Messages and attachments are scanned for viruses, checked against data leak prevention policies, and stored in an AES-encrypted archive. Recipients log in to retrieve messages, download attachments, and reply securely. Gateway policies can initiate the service, and administrator-defined criteria can trigger Office 365 encryption when TLS is unavailable. Senders and recipients need no additional software or hardware. The service supports Android, iOS, macOS, web, and Windows, and includes Outlook integration and administrative access controls. Pricing is on request. The Critical, Advanced, and Premium plans all include secure message and large-file delivery and email continuity; their listed security coverage varies by plan.