Best Data Security & Privacy Tools in 2026

Puter

Your personal cloud for files, apps, and games

Stars
40,840
Forks
3,709
Last commit
2 hours ago

Puter is a privacy-focused personal cloud platform that securely stores your files, apps, and games, accessible from anywhere.

Open Source Alternative to:

Google Drive

Mattermost

Secure collaboration platform for mission-critical work

Stars
36,495
Forks
8,584
Last commit
1 hour ago

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

Open Source Alternative to:

Microsoft Teams

Ente

Secure, private photo storage and sharing solution

Stars
26,216
Forks
1,562
Last commit
2 days ago

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
28,730
Forks
6,721
Last commit
5 days ago

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:

Session

Element

Secure, decentralized messaging for teams and individuals

Stars
13,058
Forks
2,588
Last commit
1 day ago

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

Open Source Alternative to:

Discord

Fluxer

Open source messaging with privacy and community focus

Stars
8,490
Forks
486
Last commit
23 days ago

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:

Discord

Tuta

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

Stars
7,542
Forks
617
Last commit
2 days ago

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

Open Source Alternative to:

Microsoft 365

Cinny

Secure and elegant Matrix client for seamless conversations

Stars
3,602
Forks
510
Last commit
5 days ago

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

Open Source Alternative to:

Discord

Stoat

Privacy-first chat app with customizable interface

Stars
3,000
Forks
343
Last commit
5 days ago

Modern chat platform featuring text channels, community building tools, fine-grained permissions, and complete privacy protection. Open-source and ad-free.

Open Source Alternative to:

Discord

Peergos

Secure, private, and decentralized file storage

Stars
2,404
Forks
190
Last commit
20 hours ago

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:

Dropbox

Wire

Secure collaboration platform with end-to-end encryption

Stars
2,536
Forks
179
Last commit
4 months ago

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:

Discord

Streamdal

Code-native data privacy for real-time applications

Stars
615
Forks
16
Last commit
2 months ago

Embed privacy controls in your code to detect and protect PII, preventing unintended data exposure and building trust through secure data handling.

SAMA

Secure, scalable chat server for modern applications

Stars
154
Forks
12
Last commit
8 days ago

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:

Discord

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Stars
Forks
Last commit

Puter

Your personal cloud for files, apps, and games

Stars
40,840
Forks
3,709
Last commit
2 hours ago

Puter is a privacy-focused personal cloud platform that securely stores your files, apps, and games, accessible from anywhere.

Open Source Alternative to:

Google Drive

Mattermost

Secure collaboration platform for mission-critical work

Stars
36,495
Forks
8,584
Last commit
1 hour ago

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

Open Source Alternative to:

Microsoft Teams

Ente

Secure, private photo storage and sharing solution

Stars
26,216
Forks
1,562
Last commit
2 days ago

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
28,730
Forks
6,721
Last commit
5 days ago

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:

Session

Element

Secure, decentralized messaging for teams and individuals

Stars
13,058
Forks
2,588
Last commit
1 day ago

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

Open Source Alternative to:

Discord

Fluxer

Open source messaging with privacy and community focus

Stars
8,490
Forks
486
Last commit
23 days ago

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:

Discord

Tuta

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

Stars
7,542
Forks
617
Last commit
2 days ago

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

Open Source Alternative to:

Microsoft 365

Cinny

Secure and elegant Matrix client for seamless conversations

Stars
3,602
Forks
510
Last commit
5 days ago

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

Open Source Alternative to:

Discord

Stoat

Privacy-first chat app with customizable interface

Stars
3,000
Forks
343
Last commit
5 days ago

Modern chat platform featuring text channels, community building tools, fine-grained permissions, and complete privacy protection. Open-source and ad-free.

Open Source Alternative to:

Discord

Peergos

Secure, private, and decentralized file storage

Stars
2,404
Forks
190
Last commit
20 hours ago

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:

Dropbox

Wire

Secure collaboration platform with end-to-end encryption

Stars
2,536
Forks
179
Last commit
4 months ago

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:

Discord

Streamdal

Code-native data privacy for real-time applications

Stars
615
Forks
16
Last commit
2 months ago

Embed privacy controls in your code to detect and protect PII, preventing unintended data exposure and building trust through secure data handling.

SAMA

Secure, scalable chat server for modern applications

Stars
154
Forks
12
Last commit
8 days ago

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:

Discord

Open Source Data Security & Privacy Tools

A curated collection of the best open source tools focused on protecting data and ensuring user privacy.

Puter

Mattermost

Ente

Signal

Element

Fluxer

Tuta

Cinny

Stoat

Peergos

Wire

Streamdal

SAMA

Puter

Mattermost

Ente

Signal

Element

Fluxer

Tuta

Cinny

Stoat

Peergos

Wire

Streamdal

SAMA