Alternatives to EMP for all platforms with any license

Tox

Send messages, files, create groups and make Tox to Tox audio and video calls. Securely.

Free Open Source Mac Windows Linux Android iPhone ... Android Tablet BSD
Decentralized Encrypted chat Peer-To-Peer Privacy focused ... Built-in player Apps with End-to-End Encryption Share your screen Security focused Video calling Ad-free Anonymity Anonymous Secure Filesharing Client side encryption Decentralisation Group chat Peer-To-Peer Point-to-point encryption Video calling Voice Call Add a feature

406 Like
Jami

Voice, video and chat communications, secure, decentralized, strong privacy and freedoms.

Free Open Source Mac Windows Linux Android iPhone
Decentralized Distributed Apps with End-to-End Encryption Peer-To-Peer ... Share your screen Video calling Add a feature

116 Like
I2P

The I2P network provides strong privacy protections for communication over the Internet. Many activities that would risk your privacy on the public Internet can be...

Free Open Source Mac Windows Linux Android BSD
Anonymity Anonymous email Alexa integration Built-In Proxy ... Decentralized Decentralized email Encryption Internal torrent network Torrent search Add a feature

151 Like
RetroShare

RetroShare is a open source cross-platform, private and secure decentralized communication system. It lets you to securely chat, share photos, videos, and more, using...

Free Open Source Mac Windows Linux BSD OpenSSL ... OpenPGP
Serverless Anonymous Secure Filesharing Decentralized Apps with End-to-End Encryption ... Gpg encryption Add a feature

100 Like
ChatSecure

ChatSecure is a free and open source messaging app that features OTR encryption over XMPP.

Free Open Source iPhone iPad
Encrypted chat Integrated File Sharing OTR Add a feature

60 Like
Adium

Adium is a free and open source instant messaging application for Mac OS X, written using Mac OS Xs Cocoa API, released under the GNU GPL and developed by the Adium...

Free Open Source Mac
Customizable Multiple languages Support for Multiple protocols OTR ... Supports XMPP Tabbed interface Support for Themes Add a feature

332 Like
Threema

Threema is a new mobile messaging app that puts security first. With true end-to-end encryption, you can rest assured that only you and the intended recipient can read...

Commercial Android iPhone Android Tablet Windows Phone iPad ... Android Wear
Apps with End-to-End Encryption Encrypted chat Group chat Integrated File Sharing ... Privacy focused Sync Contacts Encrypted Email Encrypted backups Encrypted calls Integrated App lock Multiple languages Picture sharing Security focused Add a feature

58 Like
Bitmessage

Bitmessage is a P2P communications protocol used to send encrypted messages to another person or to many subscribers. It is decentralized and trustless, meaning that you...

Free Open Source Mac Windows Linux BSD
Encrypted chat Peer-To-Peer Add a feature

40 Like
Wickr

Wickr is a free end-to-end encrypted text, video, picture and voice messenger with full sender control. Shredder – Irreversibly remove all deleted messages, images...

Free Mac Windows Linux Android iPhone ... Android Tablet iPad
Anonymity Built-In Proxy Encrypted chat Encryption ... Apps with End-to-End Encryption Integrated File Sharing Photographic filters Private Chat Secret chats Self destructing messages Add a feature

31 Like
Gajim

The goal of Gajim is to provide a full featured and easy to use Jabber client. Gajim works nicely with GNOME, but does not require it to run. It is released under the...

Free Open Source Mac Windows Linux BSD Xfce
Encrypted chat Group chat Multiple languages OTR ... Supports XMPP Tabbed interface Video calling Add a feature

53 Like
WeeChat

WeeChat is a fast, light and extensible chat client. It runs on many platforms (including Linux, BSD and Mac OS). WeeChat is: - modular: a lightweight core with...

Free Open Source Mac Linux Android BSD Xfce
Command line interface Extensible by Plugins/Extensions Modular System Support for Multiple protocols Add a feature

30 Like
Off-the-Record Messaging

Off-the-Record (OTR) Messaging allows you to have private conversations over any instant messaging (MSN,Gtalk, Facebook and so on) by providing encryption...

Free Open Source Mac Windows Linux Java Mobile
Encrypted chat Private Chat Add a feature

42 Like
Psi

Psi is an instant messaging application for Windows, Linux, and Mac OS X that connects to the free, open XMPP network. Localized versions of Psi are available in...

Free Open Source Mac Windows Linux BSD
Supports XMPP Add a feature

77 Like
Bit Chat

Technitium Bit Chat is a secure, peer-to-peer (p2p), open source instant messenger designed to provide end-to-end encryption. It can be used over Internet and private...

Free Open Source Windows Linux
Apps with End-to-End Encryption Peer-To-Peer Add a feature

20 Like
Torchat

TorChat is a peer to peer instant messenger with a completely decentralized design, built on top of Tor's location hidden services, giving you extremely strong...
- Discontinued The project is no longer developed since 2014. Last version, 0.9.9.553, released in September 2012, can be still downloaded from GitHub.
Free Open Source Windows Linux
Anonymity Decentralized Peer-To-Peer Portable ... Security focused Add a feature

28 Like