Open Source Data Security & Privacy Software
Data Security & Privacy software provides methods for encrypting messages, files, and network traffic to prevent unauthorized access. These tools implement end-to-end encryption and decentralized protocols to secure communication and storage. This type of software serves individuals and organizations that need to manage their own encryption keys and metadata. Self-hosting these apps ensures that private chat histories, documents, and network logs remain on hardware you manage. This approach removes reliance on external servers for storing sensitive identity information and private media.
This page lists 44 open source tools in the Data Security & Privacy category. The most popular are LocalSend, AdGuard Home and Tailscale. Most use the AGPL-3.0 or Apache-2.0 license, and 34 offer an official Docker image.
LocalSend
Share files and messages between nearby devices over a local network without requiring an internet connection.
AdGuard Home
A network-wide DNS server that blocks ads and trackers for all devices on a local network.
Tailscale
Creates private WireGuard networks to connect devices across clouds, VPCs, and on-premises networks without modifying firewall rules.
Signal
Encrypted messaging and calling that uses data connections for secure text, voice, and video communication.
Ente
End-to-end encrypted cloud storage for photos, videos, and documents with a dedicated two-factor authentication tool.
SimpleX Chat
A privacy focused messaging platform that operates without user identifiers to protect metadata and identity.
Cryptomator
Client-side encryption for files stored in the cloud to ensure privacy and data control.
Element
A communication client for encrypted messaging and collaboration built on the decentralized Matrix protocol.
BunkerWeb
A web application firewall and reverse proxy that provides secure by default protection for web services.
Technitium DNS Server
Self host an authoritative and recursive DNS server to manage network privacy, security, and ad blocking.
PrivateBin
A minimalist pastebin where data is encrypted in the browser to ensure server zero knowledge.
CryptPad
A collaborative suite providing end-to-end encrypted document editing and file sharing for privacy focused team workflows.
OnionShare
Securely and anonymously share files, host websites, and chat with others using the Tor network.
Blocky
A DNS proxy and ad-blocker for local networks that filters queries using external blocklists.
ejabberd
Realtime communication platform providing XMPP server, MQTT broker, and SIP service capabilities for scalable messaging.
Outline Server
A proxy server running a Shadowsocks instance with a REST API for managing access keys.
Passbolt
A security focused password manager for teams to centralize, organize, and share credentials and secrets securely.
AnonAddy
An email forwarding service that creates aliases to protect real email addresses from spam and tracking.
Synapse
A homeserver implementation for the Matrix open standard for secure and interoperable real-time communications.
OpenZiti
A zero-trust networking platform that makes network services invisible to unauthorized users through cryptographic identity.
Cinny
A secure and modern Matrix client providing an encrypted interface for decentralized instant messaging conversations.
Converse
A client side XMPP chat application that runs in web browsers or as a desktop app.
Kamailio
A SIP signaling server for large scale VoIP and real time communication platforms focusing on scalability.
Quiet
A peer-to-peer team chat that syncs messages directly between devices over Tor without central servers.
Wire
Provides end to end encrypted messaging, file sharing, and video calls for secure team communication and collaboration.
nheko
A native desktop client for the Matrix protocol designed to feel like a mainstream chat application.
Peergos
A peer to peer encrypted filesystem for secure file storage, sharing, and decentralized collaboration.
Tuwunel
A high performance Matrix homeserver written in Rust for scalable and low cost communication infrastructure.
Chitchatter
A decentralized peer to peer communication tool providing encrypted chat, video conferencing, and ephemeral file sharing.
RetroShare
A decentralized communication toolkit providing secure file sharing, chat, forums, and messaging without central servers.
Join our newsletter to get shiny new open source software delivered to your inbox. Unsubscribe anytime.