Best Threema Alternatives (77)

Slack

free

Slack, the modern messaging platform for teams. Communicate in real-time, organize conversations into channels, and streamline collaboration. With integrations, file …

WhatsApp

Free

WhatsApp is a popular cross-platform instant messaging and voice over IP service owned by Meta. It allows users to send …

Tinode

Open Source

Tinode is an open-source real-time messaging and chat platform. It enables building chat applications and messaging features with REST API, …

AtomJump.com

AtomJump is a software suggestion website that provides alternatives and comparisons for various types of software. It aims to help …

ChatStep

ChatStep is an AI-powered chatbot platform that allows anyone to easily create chatbots for websites, messaging apps, and more. It …

Zulip

Open Source

Zulip is an open-source team chat software that focuses on threaded conversations to improve productivity and organization. It has features …

SureSpot

SureSpot is a privacy-focused messaging app that provides end-to-end encryption. It allows users to have secure conversations and share media …

SumRando Messenger

SumRando Messenger is a free, ad-free messaging app that focuses on privacy and security. It offers encrypted messaging, self-destructing messages, …

LeggoChat

Open Source

LeggoChat is an open-source, self-hosted chat and instant messaging application. It allows users to communicate in real-time through public and …

Google Allo

Google Allo is a messaging app by Google launched in 2016. It has features like Google Assistant integration, smart replies, …

Wickr

Open Source

Wickr is an encrypted messaging app that allows users to exchange end-to-end encrypted and content-expiring messages, including photos, videos, and …

chat.onion

chat.onion is an anonymous chat service accessible through the Tor browser. It allows users to chat securely and privately without …

Signal

Free

Signal is a free, open source, encrypted messaging and voice calling app. It offers end-to-end encryption for secure communication. With …

PrivyTalks

PrivyTalks is a privacy-focused video calling and chat application. It provides encrypted video calls, chat, and file sharing capabilities with …

Secure Chat

Open Source

Secure Chat is an open source, encrypted chat application that allows users to communicate privately and securely. It uses end-to-end …

Briar

Open Source

Briar is a peer-to-peer encrypted messaging app designed for activists, journalists, and people at risk of persecution. It allows secure …

Burn Note

Burn Note is a private messaging app that allows users to send encrypted messages that disappear after a set period …

MyENIGMA

Open Source

MyENIGMA is an open-source encryption software that allows users to securely encrypt files, emails, instant messages, and more. It features …

CHARE

Open Source

CHARE is an open-source alternative to Microsoft OneNote for note taking and organization. It allows users to create digital notebooks …

Jongla

Open Source

Jongla is an open-source customer relationship management (CRM) software designed for small businesses. It allows users to track sales opportunities, …

Quaternion

Open Source

Quaternion is an open source 3D painting software for digital artists and illustrators. It allows quick concept sketching, graphics creation, …

OpenWhatsapp

Open Source

OpenWhatsapp is an open-source, ad-free alternative to WhatsApp. It allows users to send messages, make voice and video calls for …

Say Hi!

Free

Say Hi! is a simple, free web and mobile app that makes it easy to record short audio messages and …

WowApp

Open Source

WowApp is a user-friendly and feature-rich web browser that provides a smooth browsing experience. It has innovative features like tab …

DatChat

DatChat is a decentralized and encrypted chat application that allows users to communicate securely. It is built on the Dat …

Plumm

Open Source

Plumm is a free, open source project management software. It provides tools for task management, time tracking, resource planning, reporting, …

PingPal Messenger

PingPal Messenger is a free instant messaging and video chat app. It allows users to connect with friends and family …

Xabber

Open Source

Xabber is an open-source chat client for Windows, Linux, MacOS, Android, and iOS that allows users to connect to multiple …

ARKNet

Open Source

ARKNet is an open-source blockchain platform developed in C# and .NET that aims to provide an accessible blockchain solution for …

Sicher

Open Source

Sicher is an open-source, self-hosted password manager that allows you to securely store passwords and other sensitive information. It has …

Tox

Open Source

Tox is an open-source, peer-to-peer instant messaging and video calling application focused on privacy and security. It offers end-to-end encryption …

Carrot.io

Carrot.io is a software platform that enables companies to build and manage AI products like chatbots, voice assistants, and other …

Bitmessage

Open Source

Bitmessage is a decentralized, encrypted communications protocol that allows users to send messages securely over a peer-to-peer network. It provides …

Quill Messaging

Quill Messaging is a team communication and collaboration tool with features like chat rooms, video calls, task management, and file …

ChatSecure

Open Source

ChatSecure is an open source, encrypted messaging app for iOS and Android that allows users to communicate privately and securely. …

Conversations

Open Source

Conversations is an open source instant messaging client focused on security and privacy. It offers end-to-end encryption for chats and …

Hemlis

Open Source

Hemlis is an open-source, privacy-focused messenger that allows secure chats, voice calls, and file transfers. It uses end-to-end encryption to …

KeeperChat

KeeperChat is a secure, encrypted team messaging app. It allows teams to communicate privately through encrypted chat rooms and direct …

Cryptocat

Open Source

Cryptocat is a free open source messaging application focused on security. It offers encrypted instant messaging communication using end-to-end encryption …

Coverme

Open Source

Coverme is a privacy-focused web browser that prevents tracking and fingerprinting. It has built-in ad blocking, disables cookies by default, …

GoldBug

Free

GoldBug is an open source, encrypted messaging application for Windows, macOS, Linux, iOS and Android. It provides end-to-end encryption of …

Telegram

Free

Telegram is a cloud-based instant messaging and voice over IP service. It offers end-to-end encrypted video calling, file sharing, and …

SiskinIM

Open Source

SiskinIM is an open-source instant messaging client for Linux, Windows, and macOS that focuses on security and privacy. It offers …

monocles chat

Open Source

Monocles Chat is an open-source, self-hosted team chat and collaboration platform. It offers features like private and public channels, direct …

Session

Open Source

Session is a messaging app that focuses on privacy and security. It offers end-to-end encryption, the ability to delete messages …

Secret Messenger

Secret Messenger is an encrypted messaging app that allows users to have private conversations and share files securely. It uses …

SimpleX Chat

Open Source

SimpleX Chat is a free, open source instant messaging application allowing users to message, voice and video chat securely without …

Photo4Tune

Photo4Tune is a photo editing software that allows users to easily tune and adjust photos. It has features like one-click …

Workchat

Workchat is a team communication and collaboration platform that allows workers to chat, meet, call, and collaborate across devices. It …

BitMail

Free

BitMail is an open source, decentralized and encrypted email service that allows users to send and receive private email messages. …

Tellonym

Tellonym is an anonymous messaging app that allows users to receive and send anonymous messages. Users sign up with a …

Element X

Element X is a vector graphics editor for creating 2D illustrations, animations, icons, logos, and more. It offers a clean …

Dasher Messenger

Dasher Messenger is a desktop and mobile messaging app that offers encrypted messaging and video calling. It has cross-platform support, …

Engage Spaces

Engage Spaces is a virtual event platform that allows organizations to host customized branded events such as conferences, trade shows …

Quicksy

Quicksy is a powerful yet easy-to-use screenshot and screen recording software for Windows. It allows you to capture screenshots, record …

Lemon Group Messenger

Open Source

Lemon Group Messenger is a free and open-source instant messaging app for groups. It allows users to chat in groups …

FireFloo Communicator

Free

FireFloo Communicator is a free, open source video conferencing software. It allows users to make video calls with screen sharing, …

Anonymous Messenger

Open Source

Anonymous Messenger is a free, open-source software for anonymous and encrypted messaging. It allows users to communicate securely without disclosing …

Cyanide

Open Source

Cyanide is an open source 2D game engine that is lightweight and easy to use for developing 2D games. It …

Zoho Cliq

Zoho Cliq is a team collaboration and communication platform that allows teams to chat, meet, collaborate on files and tasks. …

WWChat

Open Source

WWChat is a free and open source chat application for Windows. It allows users to chat in private or public …

Async

Open Source

Async is an open source asynchronous task queue / job queue based on Redis, developed in Python. It allows you …

GAM Messenger

Open Source

GAM Messenger is a free, ad-free messaging app for Android and iOS that focuses on privacy and security. It offers …

Confide

Confide is an encrypted messaging app that allows users to send self-destructing text, video and audio messages that are automatically …

Numbertank

Open Source

Numbertank is an alternative to Microsoft Excel for numerical analysis, statistics and machine learning. It is a desktop application designed …