monocles chat is a fork of blabber.im and Conversations with some changes, to improve usability.
Cost / License
- Freemium
- Open Source (GPL-3.0)
Application typeApplication types
Platforms
- Online
- Android
- F-Droid
Germany
EU
Threema Alternatives
Apps similar to Threema include Signal, which is free and open source. Other options are Telegram, Element, Tox and SimpleX Chat. Instant Messengers like Threema are a crowded field, with more than 100 alternatives for Android, iPhone, Windows, Mac and Linux.
Alternatives list
Real-time chat platform structured with threads, custom feeds, project tagging, and AI moderation. Provides privacy controls, instant file and code sharing, multiple viewing modes, moderator tools, light/dark modes, and unifies collaboration for organizations and communities.
Cost / License
- Paid
- Proprietary
Application typeApplication types
Platforms
- Mac
- Windows
- Linux
- Slack
United States
129 Xabber alternativesOpen source Jabber (XMPP) client with multi-account support, clean and simple interface. Being both free (as in freedom!) and ad-free, Xabber is designed to be the best Jabber client for Android .
Platforms
- Online
- Android
- F-Droid
- United States
161 Tinode alternativesFully open source instant messaging server and clients. No proprietary components or non-free dependencies. Backend in pure Go (GPL 3.0), with a command-line administration tool in python + gRPC. Clients for Android, iPhone, and Web - ReactJS (all licensed under Apache 2.0).
Cost / License
- Free
- Open Source (GPL-3.0)
Application typeApplication types
Platforms
- Online
- Android
- iPhone
- Self-Hosted
- Software as a Service (SaaS)
- United States
+4
ROOM-39 is a privacy-preserving, security-focused social platform built on a zero-knowledge architecture. Unlike standard messengers, ROOM-39 is designed under the principle that privacy is enforced by mathematics, not trust.
Cost / License
- Free
- Proprietary
Platforms
- Online
- Android
- Android Tablet
Canada
+5
Tinfoil Chat (TFC) is a FOSS+FHD peer-to-peer messaging system that relies on high assurance hardware architecture to protect users from passive collection, MITM attacks and most importantly, remote key exfiltration.
Cost / License
- Free
- Open Source
Platforms
- Linux
GoldBug is a secure Instant Messenger. You can be sure with using GoldBug (GB), that no third party can look into your chat communication. Private user-to-user communication remains private. GoldBug therefore uses strong multi-encryption with different layers of modern...
Cost / License
- Free
- Open Source
Application typeApplication types
Platforms
- Mac
- Windows
- Linux
- BSD
+5
SureSpot is an open source encrypted messenger designed to make encrypted messaging simple and accessible to anyone.
Platforms
- Android
- iPhone
- iPad
- United States
Cost / License
- Free
- Open Source (GPL-3.0)
Application typeApplication types
Platforms
- Android
- Germany
- EU
Cost / License
- Free
- Open Source
Application type
Platforms
- Android
160 Tauria alternativesFully end-to-end encrypted business collaboration platform that is the only on the market supporting E2EE HD video conference up to 100 participants.
Cost / License
- Paid
- Proprietary
Platforms
- Mac
- Windows
- Linux
- Android
- iPhone
- Android Tablet
- iPad
- Software as a Service (SaaS)
- United States
At this point in the digital world, our personal digital metadata – not just our messages, but data about who talks to whom, when, and where – has been marketed, auctioned, and monetized hundreds of thousands of times over.
Platforms
- Android
- iPhone
