Which gpg4o version suits you?

gpg4o is equally suitable for companies and private individuals for secure email encryption. Since the installation, administration, archiving and data backup requirements of companies are very specific and complex, we offer a slimmed-down and free version, gpg4o Free, for private individuals in addition to the full version.

Full version gpg4o Free

For companies: The gpg4o full version

The gpg4o full version is primarily intended for companies but also for technically experienced users who want to benefit from extensive functions and our support.

Services and functions at a glance

Email encryption made easy
- Encrypt and sign emails easily
- Sign attachments as well as encrypt and decrypt them
- Support for distribution lists and Exchange groups – Individually configurable sender rules (e.g. “Always encrypt to…”)
Large user base: use of the worldwide standard OpenPGP
- Compatible with many other encryption programs such as Symantec Encryption (formerly PGP), Enigmail, KMail, Apple Mail, K9 Mail and iPGMail
- Supports international character sets
- Strong cryptography using elliptic curves: greater security, more speed, smaller keys
Clear key management
- Exchange keys with local and public key servers
- Web of Trust – check trustworthiness of foreign keys based on information from known key holders

Special functions for companies

Functions for administrators
- Support for terminal servers
- All functions of the product configurable via Microsoft Policy Manager through group policies
- Can be integrated into software distribution systems, unattended installation possible
- Automated creation of key pairs
Support for working groups
- Role model support
- Outlook deputy support
- Groupware solutions: Compatibility with Zarafa, Kerio Connect, Microsoft Exchange.
Key server support
- Simple key distribution through automatic synchronization
- Central key management (requires Enterprise KeyServer)

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How to benefit from gpg4o Free

For private users, we offer our email encryption add-in gpg4o as a free freeware version: gpg4o Free. This provides all private Outlook users with free end-to-end encryption that has been tried and tested in numerous companies. Encryption and signature guarantee you the greatest possible confidentiality in communication via e-mail. Thanks to simple installation and intuitive operation, your data exchange via e-mail is quickly and comprehensively protected thanks to gpg4o. gpg4o is based on OpenPGP, one of the most widely used and most secure encryption methods. Made in Germany – guaranteed without backdoors.

Functions of the gpg4o Free Version

For private users
gpg4o Free is the product variant for private users, education and training. gpg4o Free is not licensed for corporate use.
Slimmed down full version
Contains all functions necessary for private individuals
Mail account types
gpg4o Free supports the most important mail account types, even different ones at the same time: POP3, IMAP4, Exchange ActiveSync (also outlook.com)
Licensing for individuals
Each natural person needs one license. This can be used simultaneously on multiple computers and in different profiles.

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Restrictions to the full version::

No support for Microsoft® Exchange Servers.
No individual sender rules.
No saving of decrypted e-mails.
No automatic upload and download of keys.

No check for GnuPG updates.
Only one account active at a time.
No commercial use.

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In order to make your e-mail traffic secure, we are happy to assist you with competence and experience