The best secure email client software. Continuously improving since 1998.

The Bat! is a secure email client software, built to protect your correspondence against third-parties.

The Bat! protects your information through multiple encryption streams with the options to encrypt your emails on disk and during communication through an SSL/TLS connection. Free of global email providers that keep your messages in the cloud, and free of Web clients, The Bat! ensures your data stays private.

The Bat! mail client is able to process and store an unlimited number of messages and has no restriction on the number of email accounts you can use.

Key features

PGP, GnuPG and S/MIME support

Powerful filtering system

Internal HTML Viewer

The Bat!'s own Address Book

Safe handling of attached files

Handy templates

Selective download

RSS Feed subscriptions

Check out Security and Productivity features

Manage your mail

Tweak the main window to fit your needs. Customize the account and folder tree, the message list, the toolbar and more.

Message editor window

Compose and customize your messages, add smiles and stay connected in different languages with support for national codepages.

Sorting Office

Manage your mail quickly and efficiently; customizable filters ensure your mail is automatically organized just how you like it.

Address book

The Address Book gives you an easy way to manage your contacts. Upload your existing contacts to, or download from Google, Outlook and more, or fill in personal and business information. Add photos and customize messages for each contact.

At Work or at Home

The Bat! is available in two editions - Professional and Home. Get The Bat! Voyager for free when you purchase The Bat! Professional.


Professional Edition

Commercial and non-commercial uses

  • The Bat Voyager for free!

  • Message base encryption

  • Biometric authentication

  • Hardware authentication with mail servers

30-day trial



Home Edition

Non-commercial uses only

  • -

  • -

  • -

  • -

30-day trial