With backup and sync, Stingle Photos offers a gallery and camera app; its page says photos and videos are encrypted before storage.
GnuPG
GnuPG implements the OpenPGP standard and provides tools to encrypt and sign data and communications, with key management and directory access.
About GnuPG
GnuPG, also known as GPG, is a command line tool that implements the OpenPGP standard as defined by RFC4880. It allows users to encrypt and sign data and communications, and includes a key management system with access modules for public key directories.
It also provides support for S/MIME and Secure Shell (ssh), and can be integrated with other applications through available frontend applications and libraries. A Windows version called Gpg4win is available with a context menu tool, a crypto manager, and an Outlook plugin for PGP/MIME mail.
Key features
- Encrypt and sign data and communications using OpenPGP
- Key management system with public key directory access modules
- Command line tool that integrates with other applications
- Support for S/MIME and Secure Shell (ssh)
- Gpg4win Windows build with context menu tool and crypto manager
- Outlook plugin to send and receive standard PGP/MIME mails
Best for: People who need to encrypt and sign files or communications using OpenPGP, including Windows users via Gpg4win.
Good for
- Free Software distributed under the terms of the GNU General Public License
- Implements the OpenPGP standard defined by RFC4880
- Frontend applications and libraries are available for use with other applications
GnuPG at a glance
- Website
- gnupg.org
- Type
- Website
- Pricing
- Not confirmed. Check the site
- Platforms
- Web, Windows
- Open source
- Not stated
- Language
- English
- Last checked
- Oct 5, 2026 · Online when checked
- Listed
- Oct 5, 2026
GnuPG alternatives
Tools and sites you could use instead, ranked by how closely they match.
Available on web, iOS, Android, and desktop, Proton Mail is an encrypted email service that offers free accounts.
FreemiumOpen sourcePick
24 alternatives
This OpenPGP page lists email applications that support the standard directly or through additional software, across several desktop platforms.
Encrypt email and files on Windows with Gpg4win, a software package based on GnuPG.
Tuta offers encrypted email, calendar, and contacts, with apps that the site says protect personal data using end-to-end encryption.
Minisign signs files and verifies signatures through a simple command-line tool.
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GnuPG FAQ
What is GnuPG?
GnuPG is a free implementation of the OpenPGP standard as defined by RFC4880 for encrypting and signing data and communications.
Is there a Windows version of GnuPG?
Yes, Gpg4win is a Windows version of GnuPG with a context menu tool, a crypto manager, and an Outlook plugin for PGP/MIME mail.
Does GnuPG support standards other than OpenPGP?
Yes, GnuPG also provides support for S/MIME and Secure Shell (ssh).
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