Showing 473 open source projects for "secure"

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  • 1
    Telegram Desktop

    Telegram Desktop

    Telegram Desktop messaging app

    Telegram Desktop is the official C++/Qt-based cross-platform client for Telegram, implementing the full Telegram API and MTProto protocol for secure messaging, voice/video calls, file sharing, and chat features. It provides message sync across devices, supports themes, stickers, bots, and is actively maintained.
    Downloads: 519 This Week
    Last Update:
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  • 2
    NATS

    NATS

    Server for NATS.io, the cloud and edge native messaging system

    With flexible deployments models using clusters, superclusters, and leaf nodes, optimize communications for your unique deployment. The NATS Adaptive Edge Architecture allows for a perfect fit for unique needs to connect devices, edge, cloud or hybrid deployments. With true multi-tenancy, securely isolate and share your data to fully meet your business needs, mitigating risk and achieving faster time to value. Security is bifurcated from topology, so you can connect anywhere in a deployment...
    Downloads: 276 This Week
    Last Update:
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  • 3
    Element Android

    Element Android

    A glossy Matrix collaboration client for Android

    ...It is part of the Matrix ecosystem, which is an open network for secure, decentralised communication governed by The Matrix.org Foundation.
    Downloads: 4 This Week
    Last Update:
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  • 4
    ArmCord

    ArmCord

    ArmCord is a custom client designed to enhance your Discord experience

    ...This means you can have a much more stable and secure experience, along with slightly better performance.
    Downloads: 94 This Week
    Last Update:
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  • 5
    Session for iOS

    Session for iOS

    A Decentralized, Onion Routed, Private Messenger

    ...On iOS, Session integrates with Apple’s notification and background execution frameworks so that messages arrive reliably while preserving privacy protections, and it supports Face ID/Touch ID unlock to guard access to local message storage. Its interface follows iOS conventions for navigation, attachments, and user interaction, making secure messaging feel natural to Apple users while maintaining rigorous cryptographic standards.
    Downloads: 12 This Week
    Last Update:
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  • 6
    Telegram for Android

    Telegram for Android

    Telegram messenger for Android

    Telegram is a wonderful and private messaging app that offers simple, fast, secure and synced messaging for all your devices. It delivers messages faster than any other application; cloud-based so you can access your messages from any device; and very secure, with messages heavily encrypted and could even self-destruct. Telegram is simple and fun to use, with powerful photo and video editing tools as well as an open sticker/GIF platform to let you express yourself fully. ...
    Downloads: 11 This Week
    Last Update:
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  • 7
    Session Desktop

    Session Desktop

    A Decentralized, Onion Routed, Private Messenger

    Session Desktop is an open-source, privacy-focused messaging application that brings secure, decentralized communication to desktop environments such as Windows, macOS, and Linux, providing users with encrypted text, media, and group chats without requiring phone numbers or email addresses. Built on the Session protocol and the Loki network, it routes messages through a distributed onion-routing network that hides metadata like sender, timing, and location so that conversations are resistant to surveillance and correlation attacks. ...
    Downloads: 34 This Week
    Last Update:
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  • 8
    Rocket.Chat Mobile

    Rocket.Chat Mobile

    Rocket.Chat mobile clients

    A secure and compliant collaboration platform. Own your data, customize anything, and integrate everything. We use communication platforms on a daily basis to collaborate with colleagues, other companies, customers and communities. Most of them give you very little in terms of control and customizations; except Rocket.Chat. Bring together messages, projects, and tasks into one place and watch your team’s productivity rise to new heights.
    Downloads: 23 This Week
    Last Update:
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  • 9
    Status - a Mobile Ethereum OS

    Status - a Mobile Ethereum OS

    A free (libre) open source, mobile OS for Ethereum

    Status is a secure messaging app, crypto wallet, and Web3 browser built with state-of-the-art technology. Integrated into one powerful super app for private secure communication. Safely send, store and receive cryptocurrencies including ERC20 and ERC721 tokens with the Status crypto wallet. Only you hold the keys to your funds. Status' intuitive design protects you and your funds from attacks.
    Downloads: 1 This Week
    Last Update:
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  • 10
    Cinny

    Cinny

    Yet another matrix client

    ...Users can self-host Cinny, deploy it via Docker or as a static web app, and connect to Matrix homeservers to participate in federated chats across communities and personal networks. The client also supports common Matrix features such as spaces, multi-account login, threads, and secure messaging patterns that make it competitive with other decentralized IM platforms.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 11
    LocalSend

    LocalSend

    An open-source cross-platform alternative to AirDrop

    LocalSend is a free, open-source app that allows you to securely share files and messages with nearby devices over your local network without needing an internet connection. LocalSend is a cross-platform app that enables secure communication between devices using a REST API and HTTPS encryption. Unlike other messaging apps that rely on external servers, LocalSend doesn't require an internet connection or third-party servers, making it a fast and reliable solution for local communication.
    Downloads: 218 This Week
    Last Update:
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  • 12
    libsignal

    libsignal

    Home to the Signal Protocol and other cryptographic primitives

    ...Although its primary use is within the Signal ecosystem, its documentation and exposed interfaces allow developers to explore modern secure messaging primitives or use pieces of the protocol in experimental applications.
    Downloads: 0 This Week
    Last Update:
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  • 13
    Element

    Element

    A glossy Matrix collaboration client for the web

    Element, formerly known as Vector and Riot, is a glossy Matrix collaboration client built using the Matrix React SDK. It offers teams, friends and organizations a secure, all in one chat app that is protected from pesky ads and data mining methods. All communications are done through the open global Matrix network, secured with end-to-end encryption. Element gives you all the services you need from a chat app: group chat, video calls, file sharing and more-- all done securely and in total privacy. ...
    Downloads: 8 This Week
    Last Update:
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  • 14
    Proton Mail for Android

    Proton Mail for Android

    Proton Mail Android app

    ...It supports composing messages, viewing attachments, handling contacts, and configuring account and mail settings from within the app, giving users portable access to their secure inbox wherever they go. Because ProtonMail’s service never sees unencrypted content, the Android client performs necessary encryption and decryption on the device, aligning with Proton’s privacy-first philosophy and open-source security model.
    Downloads: 11 This Week
    Last Update:
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  • 15
    EdgeVPN

    EdgeVPN

    The immutable, decentralized, statically built p2p VPN

    Fully Decentralized. Immutable. Portable. Easy to use Statically compiled VPN and a reverse proxy over p2p. EdgeVPN uses libp2p to build private decentralized networks that can be accessed via shared secrets.
    Downloads: 32 This Week
    Last Update:
    See Project
  • 16
    Element iOS

    Element iOS

    A glossy Matrix collaboration client for iOS

    ...On iOS, Element handles user identity, room membership, and end-to-end encryption with strong key management, allowing users to hold secure conversations that only intended participants can read, even across federated instances. The interface adheres to modern iOS paradigms, offering intuitive navigation, notifications, threaded replies, message reactions, customizable themes, and support for rich media rendering.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17
    Tox

    Tox

    A New Kind of Instant Messaging

    ...Everything done on Tox is encrypted using open-source libraries so you can be assured of completely private conversations. It also has no central servers that can be raided, shut down, or forced to turn over data. There are no corporate interests, no hidden agendas-- just simple, secure and easy to use messaging.
    Downloads: 5 This Week
    Last Update:
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  • 18
    Proton Mail for iOS

    Proton Mail for iOS

    Secure email that protects your privacy

    Proton Mail for iOS is the official iPhone and iPad client that brings Proton’s secure, end-to-end encrypted email service to Apple’s mobile ecosystem, combining strong privacy protections with native performance and gestures. The app allows users to sign in to one or multiple Proton Mail accounts, read and compose encrypted messages, schedule emails, protect emails with passwords, set expiration timers, and organize mail with labels and folders inside a smooth, intuitive iOS interface. ...
    Downloads: 2 This Week
    Last Update:
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  • 19
    Synapse

    Synapse

    Matrix reference homeserver

    ...Synapse is currently in rapid development, but as of version 0.5 we believe it is sufficiently stable to be run as an internet-facing service for real usage! Create and manage fully distributed chat rooms with no single points of control or failure. Eventually-consistent cryptographically secure synchronization of room state across a global open network of federated servers and services. Send and receive extensible messages in a room with (optional) end-to-end encryption. Use 3rd Party IDs (3PIDs) such as email addresses, phone numbers, Facebook accounts to authenticate, identify and discover users on Matrix.
    Downloads: 45 This Week
    Last Update:
    See Project
  • 20
    AltSendme

    AltSendme

    Send files and folders anywhere in the world without storing in cloud

    Alt-Sendme is a free, open-source peer-to-peer file transfer tool that allows users to send files and folders directly between devices without relying on cloud storage or intermediary accounts. Built with modern networking principles, it provides a secure, end-to-end encrypted connection that prioritizes privacy, so personal data is not stored on third-party servers during transfer. Users can share files of any size and format easily, which makes Alt-Sendme a flexible alternative to services like WeTransfer, Dropbox, or Google Drive that impose limits or require accounts. The tool works cross-platform and is designed to be frictionless, opening received transfers automatically in the system file explorer for a smooth user experience. ...
    Downloads: 26 This Week
    Last Update:
    See Project
  • 21
    Session for Android

    Session for Android

    A Decentralized, Onion Routed, Private Messenger

    Session Android is the official mobile client for Session, a privacy-first messaging protocol that enables secure, anonymous messaging without requiring phone numbers, email addresses, or centralized user accounts. Built natively for Android, the app lets users send and receive end-to-end encrypted text messages, voice notes, images, and attachments in both one-on-one and group chats, all while routing data through a decentralized onion-routing network designed to protect not just message content but also metadata like sender ID, timing, and network location. ...
    Downloads: 31 This Week
    Last Update:
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  • 22
    Sideband

    Sideband

    LXMF client for Android, Linux and macOS to communicate with people

    Sideband is a privacy-focused, peer-to-peer mesh messaging protocol and platform that allows users to communicate directly over local networks or the internet without servers. It emphasizes metadata resistance and secure message delivery, working effectively in offline, low-bandwidth, or disaster recovery scenarios. Built-in Rust, Sideband supports encrypted group messaging, file transfers, and network self-discovery. It is ideal for use in community networks, crisis response, and decentralized communications infrastructure.
    Downloads: 12 This Week
    Last Update:
    See Project
  • 23
    AWL

    AWL

    Securely connect your devices into a private network

    Anywherelan (AWL) is a peer-to-peer mesh VPN solution designed to securely connect devices across diverse networks without relying on centralized servers. By leveraging WireGuard tunneling and built-in NAT traversal, AWL facilitates seamless device connectivity at the IP level, enabling users to access services like SSH, RDP, or self-hosted applications without complex configurations. Its decentralized architecture ensures that traffic flows directly between devices, enhancing privacy and...
    Downloads: 14 This Week
    Last Update:
    See Project
  • 24
    Simple Machines Forum (SMF)

    Simple Machines Forum (SMF)

    Open-source community forum software

    Simple Machines Forum (SMF) is a free, open-source forum software package written in PHP, offering a full-featured community platform with support for user groups, moderation, theming, and plugins. It’s designed to be fast, secure, and customizable, making it ideal for creating online communities of any size.
    Downloads: 3 This Week
    Last Update:
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  • 25
    Hyperledger FireFly

    Hyperledger FireFly

    Hyperledger FireFly is the first open source Supernode

    Hyperledger FireFly is the first open source Supernode: a complete stack for enterprises to build and scale secure Web3 applications. The FireFly API for digital assets, data flows, and blockchain transactions makes it radically faster to build production-ready apps on popular chains and protocols. Hyperledger FireFly has a pluggable microservices architecture. Everything is pluggable, from the Blockchain technology, token ERC standards, and custom smart contracts, all the way to the event distribution layer and private database. ...
    Downloads: 0 This Week
    Last Update:
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