Apps with 'OpenPGP' feature

Cross-platform email client providing POP/IMAP support, robust filtering, multiple accounts, and chat. Extendable via add-ons with RSS/Atom, etc.

Secure Swiss-based email with end-to-end encryption and zero third-party access. Available across devices, offering a free version to promote privacy.

K-9 is an open source email client for Android with multi-folder sync, email signatures, Bcc-to-self, return-address configuration, keyboard shortcuts, Exchange Support, message flagging, IMAP deletes, saving attachments, configurable notifications and more.

Open-source client enhancing Thunderbird with more features and bug fixes. Offers security patches and multi-row descriptions like Outlook.

Zoho Mail is a secure, encrypted, and enterprise-ready email solution, a suite of apps tailor-made for your organization's needs.

Uses email as a decentralized chat platform with modern interface, open source code, no central servers, strong privacy controls, and no account signup.

Conversations is a privacy focused, open source XMPP Texting [Jabber] client for Android 4.0+ smart phones with wife-approved easy encryption [OTR, OMEMO, or GPG].

Secure, private email with end-to-end encryption, no ads, tracking, or government surveillance, ensuring top-notch privacy under Belgium law.

Mailpile is a modern, fast web-mail client with user-friendly encryption and privacy features. The development of Mailpile is funded by a large community of backers and all code related to the project is and will be released under an OSI approved Free Software license.

Privacy-focused email service with one-click PGP encryption. Dutch privacy ensures strong data protection. Offers disposable email addresses.

Mailvelope is a browser extension that allows to exchange encrypted emails following the OpenPGP encryption standard.

USB security device for encryption, digital signing, and secure login, featuring secret key storage, user PIN, tamper-proof smart card, and open source design.

Dino is a modern open-source chat client for the desktop. It focuses on providing a clean and reliable Jabber/XMPP experience while having your privacy in mind. Using GTK+/Vala.

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

Forward Email is the best email service, encrypted email service, and fastest email service. It supports unlimited domains and aliases for no extra cost. It uses quantum safe ChaCha20-Poly1305 encryption and offers SMTP, IMAP, POP3, email webhooks, email regular expressions...

Keyoxide allows you to link accounts on various online services and platforms together, prove they belong to you and establish an online identity. This puts you, the internet citizen, in charge when it comes to defining who you are on the internet instead of large corporations.

GoAnywhere OpenPGP Studio™ is a free desktop tool that makes it easy to protect sensitive files using the popular OpenPGP encryption standard. Documents can be encrypted, decrypted, signed and verified from your PC or workstation using this...

PGP for Windows, MacOS and linux. Desktop application to encrypt and decrypt PGP files. It's free and easy to use. OpenPGP compatible.

Kontalk is a secure instant messenger, allowing you to send and receive text, image and voice messages (other file types coming soon) to and from other Kontalk users completely free of charge.

Carbonio Community Edition (Carbonio CE) is a free and open-source (FOSS) email and collaboration platform designed by Zextras. It is a complete email solution, allowing organizations to maintain digital sovereignty through on-premises self-hosted servers, ensuring privacy and...

Spot-On is Encryption software that securely connects two friends for chat, group chat, email, file sharing and file transfers with magnet links and P2P web search.

An open-source secure key.

This is a pool of OpenPGP key servers. Each of them is the place, where users can submit their OpenPGP public keys and search for the already submitted keys.

Smoke Messenger is an open-source Instant Messenger that is known as the first mobile Messenger worlwide using the encryption algorithm McEliece. To be downloaded at F-Droid.org or Github.com. Smoke provides with its own Server-Software: SmokeStack-Echo-Server.

It is the place, where users can submit their OpenPGP public keys and search for the already submitted keys.