gpg4o vs Mimecast Secure Messaging
gpg4o
bayoosoft.comMimecast Secure Messaging
mimecast.comSide by side
| Figure | gpg4o | Mimecast Secure Messaging |
|---|---|---|
| Price from | €99.95/mo | — |
| Free plan | Yes | — |
| Free trial | Yes | — |
| Open source | — | — |
| Web | — | Yes |
| Windows | Yes | Yes |
| macOS | — | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| Plans published | 5 | 3 |
| Spec score · Email Encryption Software | 8.7 (#5) | 7.7 (#19) |
| Spec score · File encryption tools | 8.4 (#11) | 7.7 (#17) |
| Admin access controls | Yes | Yes |
| Headquarters | Darmstadt, Germany | London, United Kingdom |
| Message expiry | No | Yes |
| Outlook integration | The add-in provides end-to-end encryption directly through the Outlook interface. | Users can compose a message in Outlook and select Send Secure in the Mimecast for Outlook tab. |
| Secure delivery | attachment | portal |
| Support | Technical support is available through the contact process or the gpg4o Help menu in Outlook, with a log file sent automatically. | Mimecast directs customers to its knowledge base, community, or technical support case system for assistance. |
Plans
gpg4o
- gpg4o€99.95 a month
- gpg4o FreeFree
- gpg4o – Extension product maintenance 1 year€5,195 a year
- gpg4o – Extension product maintenance 3 years€13,995 a year
- gpg4o€9,995, paid once
Mimecast Secure Messaging
- AdvancedPrice not published
- PremiumPrice not published
- CriticalPriced on request
In their own words
gpg4o
gpg4o is a Microsoft Outlook add-in for encrypting, decrypting, signing, and checking messages and attachments. It uses public and private keys under the OpenPGP standard, and supports encrypted HTML email, PGP/MIME, and PGP/Inline. Its key management can synchronize keys, use local or public key servers, and check the Web of Trust; central management requires Enterprise KeyServer. The product also supports terminal servers, Microsoft Policy Manager, automatic key generation, and working groups. When encryption is enabled, it protects message text and attachments, but not the subject line or recipient list. The current feature page lists Outlook 2024 or 365 Classic on Windows 11 and marks Mac OS unsupported. A limited free version is available without a time limit, and a 180-day trial is noted. The listed gpg4o plan costs €99.95 a month. After maintenance expires, users can still send and read encrypted or signed email, but they do not receive further updates.
Mimecast Secure Messaging
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.