GPG Suite vs gpg4o
GPG Suite
gpgtools.orggpg4o
bayoosoft.comSide by side
| Figure | GPG Suite | gpg4o |
|---|---|---|
| Price from | — | €99.95/mo |
| Free plan | — | Yes |
| Free trial | Yes | Yes |
| Open source | — | — |
| Windows | — | Yes |
| macOS | Yes | — |
| Plans published | 1 | 5 |
| Spec score · Email Encryption Software | 8.1 (#14) | 8.7 (#5) |
| Spec score · File encryption tools | 7.5 (#21) | 8.4 (#11) |
| Free plan | No | Yes |
| Headquarters | Vienna, Austria | Darmstadt, Germany |
| Key management | GPG Keychain manages OpenPGP keys, including creating and modifying keys and importing keys from key servers or contacts. | Key Server Management supports automatic synchronization, local and public key servers, and Web of Trust checking; central management requires Enterprise KeyServer. |
| Support | An active GPG Mail Support Plan includes professional help for GPG Mail, the tools in GPG Suite, and GnuPG. | Technical support is available through the contact process or the gpg4o Help menu in Outlook, with a log file sent automatically. |
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
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.