GNU Privacy Guard (GnuPG)

The GnuPG Project · checked 13 Nov 2026

#5 · File encryption software

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How it plugs in

—Public API

NoOpen source

YesFree tier

Signal on File encryption software6.1#5 of 11

GnuPG encrypts and signs data and communications and provides key management.

Pricing

GnuPGFree software · source releases require building binaries · some compiling/install knowledge requiredFree

As gnupg.org lists them, checked 13 Nov 2026.

Near it

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Runs on

Web
Windows
Mac
Linux
iOS
Android

Facts

Website: gnupg.org
Price: Free tier
Free trial: No
Application ecosystem: The project lists frontend applications and libraries that work with GnuPG.
Commercial services: Listed commercial providers offer services such as paid support, customized development, platform porting, integration help, and code audits.
Crypto capabilities: The listed algorithms include RSA, ECDH, ECDSA, EdDSA, Elgamal, DSA, AES, Camellia, 3DES, Twofish, and SHA2.
Interface: GnuPG is a command-line tool designed for integration with other applications.
Keyserver access: GnuPG includes support for HKP keyservers.
License: GnuPG can be used, modified, and distributed under the GNU General Public License.
Notable limitation: The canonical source releases require users to build the binary version, and the page notes some compiling and installation knowledge is required.
Project organization: GnuPG is a volunteer-run community project and is not itself a legal entity; g10 Code GmbH is the legal entity behind it.
Protocols: GnuPG implements OpenPGP and also supports S/MIME and Secure Shell.
Support: The project links to community documentation and mailing lists, and lists commercial support providers separately.
Supported systems: The project lists Unix platforms, Windows, and macOS as supported systems.
Windows frontend: Gpg4win adds a context menu tool, crypto manager, and Outlook plugin for standard PGP/MIME mail.

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