gpg4o vs PDF Postman
gpg4o
bayoosoft.comPDF Postman
encryptomatic.comSide by side
| Figure | gpg4o | PDF Postman |
|---|---|---|
| Price from | €99.95/mo | $79.99/mo |
| Free plan | Yes | — |
| Free trial | Yes | Yes |
| Open source | — | — |
| Windows | Yes | Yes |
| Plans published | 5 | 15 |
| Spec score · Email Encryption Software | 8.7 (#5) | 8.1 (#15) |
| Spec score · File encryption tools | 8.4 (#11) | 7.9 (#15) |
| Admin access controls | Yes | Yes |
| Encryption | It uses asymmetric encryption with private and public keys and follows the OpenPGP standard. | It protects messages and attachments with AES-128 or AES-256 bit encryption. |
| Free plan | Yes | Yes |
| Headquarters | Darmstadt, Germany | Fargo, North Dakota, United States |
| Outlook integration | The add-in provides end-to-end encryption directly through the Outlook interface. | Yes |
| Recipient verification | identity | password |
| Secure delivery | attachment | attachment |
| Support | Technical support is available through the contact process or the gpg4o Help menu in Outlook, with a log file sent automatically. | The maker provides an online support ticket link and lists support by Encryptomatic LLC. |
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
PDF Postman
- 1 License$79.99 a month
- 5 Licenses$349.95 a month
- 10 Licenses$589.90 a month
- 25 Licenses$1,249.75 a month
- 50 Licenses$2,199.50 a month
- 75 Licenses$3,149.25 a month
- 100 Licenses$3,999 a month
- 1 License$69.99, paid once
- 5 Licenses$349.95, paid once
- 10 Licenses$589.90, 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.
PDF Postman
PDF Postman is a Windows Outlook add-in that turns email messages and attachments into password-protected PDF files. It encrypts messages and attachments using AES-128 or AES-256. Recipients can open encrypted PDFs with a PDF viewer and password, without special software or registration. The add-in converts HTML, rich-text or text messages into formatted PDFs. Users can include encrypted attachments in a PDF, protect attachments without the message, or make PDFs from attached files. The download page lists Outlook Desktop 365, 2021, 2019, 2016 and 2013 on 32-bit or 64-bit Windows, with Windows 11 or 10,.NET Framework 4.8 or later, 4 GB RAM and 2 GB of disk space as requirements. After a 15-day trial, it reverts to a free mode limited to five encrypted PDF messages per month. Listed paid options range from $79.99 a month for one license to $3,999 a month for 100 licenses; licenses are perpetual, with maintenance and upgrades optionally renewable at 25%. The maker says email remains on the user's PC rather than being sent to the cloud.