Apps to End-to-End Encryption

Firefox Send is a secure, free online service from Mozilla for sharing files with end-to-end encryption. It allows users to upload files, protect them with passwords, and set download limits or expiration dates for enhanced privacy and control.

Joplin is a free and open-source note-taking and to-do application designed for users who value data ownership, privacy, and flexibility. It offers robust synchronization options, including cloud services like Dropbox, OneDrive, and Nextcloud, as well as WebDAV. With support for Markdown, powerful search capabilities, and cross-platform availability, Joplin is a versatile tool for organizing information and boosting productivity.

GPGMail is a robust extension for Apple Mail, seamlessly integrating OpenPGP encryption and digital signatures directly into your email workflow for enhanced privacy and security.

AutoVer is a robust, lightweight, and highly configurable personal versioning and real-time backup system. It allows users to automatically save copies of their files as they are modified, providing a safety net against accidental deletions, overwrites, or data corruption.

Pidgin-Encryption is a plugin for the popular Pidgin instant messaging client that provides transparent, end-to-end encryption for your conversations using RSA.

Storj offers decentralized, encrypted cloud storage, leveraging a network of independent storage nodes to provide higher security, privacy, and availability compared to traditional centralized providers. Users benefit from end-to-end encryption and pay-as-you-go pricing.

Ricochet is a peer-to-peer instant messaging application designed for maximum privacy and anonymity. It leverages the Tor network to connect users directly, eliminating the need for central servers and reducing metadata leakage.

Elephant is a portable, privacy-focused note-taking application featuring a classic, intuitive interface. It supports robust note organization, rich text formatting, markdown, and offline access. With capabilities like image insertion and secure cloud synchronization, Elephant is designed for users needing a reliable and versatile digital notebook.

Encfs4win is a robust Windows port of the open-source EncFS cryptographic filesystem. It allows users to securely encrypt files and folders on their Windows machines and integrate seamlessly with cloud storage services, offering on-the-fly encryption and decryption through virtual drives.

Silence.im is an encrypted text messaging application for Android that prioritizes user privacy and security. It allows for secure communication via SMS/MMS, offering end-to-end encryption when communicating with other Silence users. The app is open-source and ad-free, providing a simple yet powerful platform for private mobile messaging.

MicroSIP is a free, portable SIP softphone for Windows, renowned for its lightweight design and focus on security. It allows users to make secure audio and video calls over the internet using the SIP protocol, supporting various codecs and providing features like encryption and presence.

Coccinella is a free and open-source, cross-platform XMPP/Jabber client. It offers secure instant messaging, group chat, voice chat, and a unique interactive whiteboard feature. Designed with privacy and security in mind, Coccinella provides encrypted communications and supports various communication protocols for a flexible messaging experience on Windows, macOS, and Linux.

Bit Chat is a secure, open-source, peer-to-peer instant messenger platform that prioritizes user privacy and security through robust end-to-end encryption and a decentralized network architecture. It empowers users with direct, encrypted communication, bypassing central servers and enhancing resistance to surveillance and censorship.

Telephone is a user-friendly SIP softphone application for macOS that enables encrypted voice calls over the internet or a private network. It supports various codecs and offers features like call recording, address book integration, and secure communication.

Jitsi Meet is a free, open-source video conferencing platform enabling secure and scalable group calls directly in your browser. It prioritizes privacy and offers features like screen sharing, chat, and collaborative editing without requiring account creation or software downloads.

ThinkComposer is a highly flexible visual modeling tool designed for users to create rich, structured diagrams based on their specific domain knowledge. It facilitates the organization and visualization of complex information through various diagram types and hierarchical structures, enabling deep understanding and effective communication of ideas.

Mailvelope is a free and open-source browser extension for Chrome and Firefox that brings end-to-end encryption to your existing webmail services using the OpenPGP standard. It allows users to encrypt, decrypt, and digitally sign emails directly within their web browser, enhancing privacy and security without requiring a change in email provider.

Cjdns is a peer-to-peer encrypted network protocol designed for easy setup, smooth scalability, and ubiquitous security. It aims to build a decentralized, distributed, and secure internet alternative.

Gruik is a powerful, free, and open-source note-taking service designed for users who value privacy, organization, and control over their data. Offering robust features like hierarchical organization, offline access, rich text formatting, and synchronization options, it provides a flexible platform for managing notes, ideas, and personal knowledge wikis.

Freehold is an open, secure, and lightweight platform for managing, syncing, and storing your files and data. It offers robust security features, including end-to-end encryption and encrypted backups, and supports various deployment options including self-hosting.

MyTetra is a versatile, cross-platform information manager designed for collecting, organizing, and managing various types of data. It excels as a portable note-taking application, personal information manager, and notebook, offering a robust outliner and rich text editing capabilities.

Librevault is an open-source, zero-knowledge peer-to-peer file synchronization tool emphasizing privacy and security. It allows users to sync files directly between their devices without reliance on a central cloud server, ensuring data remains under user control and is protected by end-to-end encryption.

Psi+ is a robust, cross-platform XMPP/Jabber client tailored for users who prioritize control, privacy, and extensibility. As a development branch of the classic Psi client, it offers advanced features for secure and customizable instant messaging.

CryptPad is a suite of collaborative and encrypted web applications, providing a secure and private environment for document editing, spreadsheets, presentations, and more. Leveraging zero-knowledge encryption, it ensures that only you and your collaborators can access your content, making it ideal for sensitive information.

Xabber is a free and open-source XMPP (Jabber) client for Android. It provides secure and reliable instant messaging with support for various XMPP features, including encryption, group chat, and decentralized communication. Leveraging the open XMPP protocol, Xabber offers a privacy-friendly alternative to centralized messaging platforms.

Off-the-Record Messaging (OTR) is a cryptographic protocol designed to provide secure, end-to-end encrypted instant messaging conversations for enhanced privacy and security.

Turtl is a secure and private note-taking, bookmarking, and document storage application. It utilizes strong client-side encryption to ensure that only you and authorized collaborators can access your sensitive information, making it ideal for managing confidential projects and data.

Gajim is a free and open-source instant messaging client for the XMPP protocol. Built using the GTK+ toolkit, it offers a wide array of features for secure and flexible communication, including encrypted chat, group conversations, multi-protocol support via gateways, and extensive customization options.

ChatSecure is a privacy-focused messaging application for iOS that leverages the robust and decentralized XMPP protocol. It offers strong end-to-end encryption using OTR and OMEMO, ensuring confidential communication.

Enigmail is a robust extension for Mozilla Thunderbird and SeaMonkey, providing comprehensive OpenPGP encryption and digital signing for your email communications. It integrates seamlessly into these email clients, offering a user-friendly way to protect your privacy and ensure the authenticity of your messages.