Telegram
Free
Telegram is a free cloud-based instant messaging platform.
Trillian
Freemium
Trillian is a proprietary multiprotocol instant messaging application.
Linphone
Open Source
Linphone is a free voice over IP (VoIP) service and SIP client.
Wire
Free
Wire is a cross-platform, encrypted instant messaging client created by Wire Swiss. It is available for iOS, Android, Linux, Windows, macOS and Web browser cl…
ICQ
Free
ICQ is an open source instant messaging software.
Matrix.org
Open Source
Matrix is an open protocol for real-time communication. It is designed to allow users with accounts at one communications service provider to communicate with…
Blink
Freemium
Blink is the best real-time communications client using the SIP protocol.
Coccinella
Open Source
Coccinella is a free and open-source cross-platform client for the XMPP/Jabber-instant messaging-protocol.
Dialog Messenger
Free Personal
Dialog Messenger is a handy and feature-rich enterprise multi-device messenger available for server or cloud.
Ricochet
Open Source
Ricochet uses the Tor network to reach your contacts without relying on messaging servers.
YakYak
Open Source
YakYak is a desktop chat client for Google Hangouts.
Tox
Open Source
Tox is a peer-to-peer instant-messaging and video-calling protocol that offers end-to-end encryption.
Jitsi
Open Source
Jitsi (formerly SIP Communicator) is a free and open source multiplatform voice (VoIP), videoconferencing and instant messaging application.
RetroShare
Open Source
RetroShare is open source software for encrypted filesharing, serverless email, instant messaging, online chat, and BBS, based on a friend-to-friend network b…
Ring
Open Source
Ring (SFLphone) is an open-source SIP-compatible softphone and instant messenger for Linux, Microsoft Windows, OS X and Android.
Bitmessage
Open Source
Bitmessage is a decentralized, encrypted, peer-to-peer, trustless communications protocol that can be used by one person to send encrypted messages to another…
Torchat
Open Source
TorChat is a decentralized anonymous instant messenger that uses Tor hidden services as its underlying network. It provides cryptographically secure text mess…
Bit Chat
Open Source
Bit Chat is a secure, peer-to-peer, open source instant messenger with end-to-end encryption.
Zulip
Open Source
Zulip is a chat and collaborative software.
Wickr
Free
Wickr is an instant messenger application.
Pidgin-Encryption
Open Source
Pidgin-Encryption transparently encrypts your instant messages with RSA encryption.
Compare Signal with alternatives
Compare Dialog Messenger and Signal and decide which is most suitable for you.
Compare Pidgin-Encryption and Signal and decide which is most suitable for you.