Cost / License
- Free
- Open Source
Application types
Alerts
- Discontinued
Platforms
- Android
- iPhone
- Android Tablet
- iPad
- F-Droid




Zulip is described as 'Threaded group chat with topics for live or async collaboration, open-source, supporting self-hosted or cloud use, suited for organized team discussions' and is a very popular instant messenger in the social & communications category. There are more than 100 alternatives to Zulip for a variety of platforms, including Android, iPhone, Web-based, Windows and iPad apps. The best Zulip alternative is Signal, which is both free and Open Source. Other great apps like Zulip are Telegram, Element, Discord and Matrix.






Group messaging platform owned by Microsoft. It's absolutely free, whether you're talking to a group of friends, or texting with one person. Best of all, it works on nearly every phone, via push or SMS. With GroupMe, it's easy to reach anyone, anytime, anywhere.




Add contextual activity feeds, chat, and secure file sharing directly into your apps to increase user engagement, improve in-app retention, and reduce customer churn.



Tribe is the easiest way to message. Just press and hold to record a message. Release to send.




Teams.cc is a communication application for increasing team collaboration that you can install on your PC or mobile device. This software has the ability to revolutionize the way you collaborate due to its unique functionalities.

PrivMX Fusion is safe and easy collaboration software for all kinds of teams, with virtual workspace protected by end-to-end encryption. Each team uses desktop/laptop client software and its own (zero-knowledge) PrivMX Team Server.




A fork of Signal for Android with proprietary Google binary blobs removed. Uses OpenStreetMap for maps and a websocket server connection, instead of Google Maps and Firebase Cloud Messaging.
A Custom CRM for Nonprofits with a Full Suite of Apps. We solve the biggest problems nonprofits face in a modern and user-friendly CRM.




White Noise aims to be the most secure private chat app on Nostr, with a focus on privacy and security. Under the hood, it uses the Messaging Layer Security (MLS) protocol to manage group communications in a highly secure way.

QQ is a widely used Chinese instant messaging service developed by Tencent, offering chat, voice, and video communication. It integrates social networking features like groups, forums, and customizable avatars to enhance user interaction.




Zinc connects everyone, allowing organizations to reduce mean time to repair, boost customer satisfaction and improve employee engagement.


