Best Data Security & Privacy Tools in 2026

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Best Data Security & Privacy Tools in 2026

Puter

A full desktop environment that runs in your browser

Stars
43,033
Last commit
5 hours ago
License
AGPL-3.0

Puter is a cloud-based desktop OS you run in the browser, with built-in apps, file storage, and support for hosting web apps and sites.

Open Source Alternative to:

Google Drive

Mattermost

Secure collaboration platform for mission-critical work

Stars
38,731
Last commit
5 hours ago
License
Unknown

Mattermost provides a flexible, open-source platform for secure team collaboration, designed for organizations with strict security and privacy requirements.

Open Source Alternative to:

Ente

Secure, private photo storage and sharing solution

Stars
28,270
Last commit
5 hours ago
License
AGPL-3.0

End-to-end encrypted cloud storage for photos and videos, offering privacy, security, and seamless cross-device syncing.

Open Source Alternative to:

Google Drive

Signal

Private messaging with end-to-end encryption

Stars
29,190
Last commit
2 days ago
License
AGPL-3.0

Secure messaging app with state-of-the-art encryption, voice/video calls, group chats, and file sharing. No ads, trackers, or data collection.

Open Source Alternative to:

Fluxer

Open source messaging with privacy and community focus

Stars
9,945
Last commit
18 hours ago
License
AGPL-3.0

Free, open-source instant messaging and VoIP platform with full Markdown support, voice/video calls, moderation tools, and self-hosting options for communities.

Open Source Alternative to:

Element

Secure, decentralized messaging for teams and individuals

Stars
13,365
Last commit
12 hours ago
License
AGPL-3.0

Open-source platform for encrypted communication, file sharing, and collaboration based on the Matrix protocol.

Open Source Alternative to:

Tuta

Secure email, calendar and contacts with end-to-end encryption

Stars
7,847
Last commit
18 hours ago
License
GPL-3.0

Tuta offers encrypted email, calendar and contacts with quantum-resistant security, protecting your privacy without ads or tracking.

Open Source Alternative to:

Zen

System-wide ad-blocking and privacy protection, no extensions needed

Stars
4,115
Last commit
2 days ago
License
MIT

Free, open-source desktop app that blocks ads, trackers, and surveillance scripts across all browsers and apps on Windows, macOS, and Linux.

Open Source Alternative to:

Cinny

Secure and elegant Matrix client for seamless conversations

Stars
3,838
Last commit
1 day ago
License
AGPL-3.0

Cinny offers a simple, elegant, and secure interface for Matrix-based conversations, protected by end-to-end encryption.

Open Source Alternative to:

Stoat

Group chat for friends and communities, without the baggage

Stars
3,214
Last commit
2 days ago
License
Unknown

Self-hostable group chat with servers, channels, voice, and moderation tools. No ads, no data mining, built under EU privacy law.

Open Source Alternative to:

Quiet

Serverless team chat over Tor, no phone number needed

Stars
2,634
Last commit
7 days ago
License
GPL-3.0

Quiet is a peer-to-peer messaging app that syncs messages directly between devices over Tor, with no central server, no phone number required, and no metadata leaks.

Open Source Alternative to:

Peergos

Secure, private, and decentralized file storage

Stars
2,445
Last commit
15 hours ago
License
AGPL-3.0

A peer-to-peer encrypted filesystem for secure file storage, sharing, and collaboration with end-to-end encryption and user-controlled data.

Open Source Alternative to:

Mega

Wire

Secure collaboration platform with end-to-end encryption

Stars
2,541
Last commit
7 months ago
License
GPL-3.0

A comprehensive collaboration platform offering end-to-end encrypted messaging, file sharing, and video calls with enterprise-grade security and compliance features.

Open Source Alternative to:

SAMA

Secure, scalable chat server for modern applications

Stars
159
Last commit
16 days ago
License
GPL-3.0

Open source chat server with end-to-end encryption, clustering support, and comprehensive messaging features for building real-time communication apps

Open Source Alternative to: