Top Alternatives to Signal

Telegram is a free cloud-based instant messaging platform.

WhatsApp Messenger is an instant messaging platform owned by Facebook.

Tox is a peer-to-peer instant-messaging and video-calling protocol that offers end-to-end encryption.

Trillian is a proprietary multiprotocol instant messaging application.

Jitsi (formerly SIP Communicator) is a free and open source multiplatform voice (VoIP), videoconferencing and instant messaging application.

Imo free video calls and chat is a kind of Communication apps for Android.

Linphone is a free voice over IP (VoIP) service and SIP client.

LINE is a new communication app which allows you to make free voice calls and send free messages whenever and wherever you are.

RetroShare is open source software for encrypted filesharing, serverless email, instant messaging, online chat, and BBS, based on a friend-to-friend network built on GNU Privacy Guard (GPG).

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 clients.

Ring (SFLphone) is an open-source SIP-compatible softphone and instant messenger for Linux, Microsoft Windows, OS X and Android.

ICQ is an open source instant messaging software.

WeChat is a social media with instant messaging, commerce and payment services application.

ChatSecure is a messaging application for iOS which allows OTR and OMEMO encryption for the XMPP protocol.

iMessage is an instant messaging service.

Xabber (XMPP and Jabber) is a XMPP client for the Android Operating System.

Threema is an encrypted instant messaging application for iOS, Android and Windows Phone.

Bitmessage is a decentralized, encrypted, peer-to-peer, trustless communications protocol that can be used by one person to send encrypted messages to another person, or to multiple subscribers.

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 users of a different service provider via online chat, Voice over IP, and Videotelephony.

Snapchat is an image messaging and multimedia mobile application.

TorChat is a decentralized anonymous instant messenger that uses Tor hidden services as its underlying network. It provides cryptographically secure text messaging and file transfers.

Tango is the messaging app with the best video calling. All messages and calls are free.

KakaoTalk (Korean: 카카오톡), or sometimes KaTalk, is a free mobile instant messaging application for smartphones with free text and free call features.

BlackBerry Messenger, also known as BBM is an instant messenger and videotelephony application included on BlackBerry devices that allows messaging and voice calls between BlackBerry, iOS, Android, and Windows Mobile users.

Conversations is an open source XMPP/Jabber client for the Android platform.

Sicher is a freeware instant messaging application for iOS, Android, and Windows Phone. Sicher allows users to exchange end-to-end encrypted text messages, media files and documents in both private and group chats.

Google Duo is a video chat mobile app available on the Android and iOS operating systems.

Blink is the best real-time communications client using the SIP protocol.

Bit Chat is a secure, peer-to-peer, open source instant messenger with end-to-end encryption.

Coccinella is a free and open-source cross-platform client for the XMPP/Jabber-instant messaging-protocol.

Zulip is a chat and collaborative software.

Silence.im is an encrypted text messaging service.

Dialog Messenger is a handy and feature-rich enterprise multi-device messenger available for server or cloud.

Wickr is an instant messenger application.

Ricochet uses the Tor network to reach your contacts without relying on messaging servers.

Pidgin-Encryption transparently encrypts your instant messages with RSA encryption.

YakYak is a desktop chat client for Google Hangouts.