When comparing Threema vs Signal Private Messenger, the Slant community recommends Signal Private Messenger for most people. In the question“What are the best messaging apps for iOS?” Signal Private Messenger is ranked 8th while Threema is ranked 11th. The most important reason people chose Signal Private Messenger is:
Backed by people nut about privacy, including - Edward Snowden, Whistleblower and privacy advocate - Laura Poitras, Oscar winning filmmaker and journalist - Bruce Schneier, internationally renowned security technologist - Matt Green, Cryptographer, Johns Hopkins University
Ranked in these QuestionsQuestion Ranking
Pro Registration without phone number
Registration is handled by random generated IDs. No phone number needed.
Pro Encrypted communication
Provides complete end-to-end encryption.
Pro Provides a web client
You can control and message with friends via Threema Web, the official web client for Threema.
Pro Company behind Threema is based in Switzerland
Pro Supports encrypted group chats
Pro Ability to send pics and videos
Threema supports sending media messages such as video, pics and even voice messages.
Pro Servers in Switzerland
Privacy laws protect the data Threema has.
Pro Group chat polls
Pro Truly open and secure, comes from the Open Whisper Systems Team
Backed by people nut about privacy, including
- Edward Snowden, Whistleblower and privacy advocate
- Laura Poitras, Oscar winning filmmaker and journalist
- Bruce Schneier, internationally renowned security technologist
- Matt Green, Cryptographer, Johns Hopkins University
Pro Encrypted voice calling
Unlike many other apps, signal provides not only text messaging but also live encrypted voice calling.
Pro Free as in both free beer and freedom, not as in "The customer is the product"
Pay Nothing - The development team is supported by community donations and grants. There are no advertisements, and it doesn't cost anything to use.
Con Single device only
You cannot use multiple devices to send messages. However, it does have message mirroring on a web client.
Con No cloud sync
E2E encryption means no cloud syncing of messages.
Con Not free
Unlike many other options Threema is not free as it costs $1.99 for the app.
Con Centralized architecture
Signal's server architecture has been partially decentralized since December 2013, when it was announced that the messaging protocol that is used in Signal had successfully been integrated into the Android-based open-source operating system CyanogenMod. As of CyanogenMod 11.0, the client logic is contained in a system app called WhisperPush. According to Open Whisper Systems, "the Cyanogen team runs their own [Signal messaging] server for WhisperPush clients, which federates with [Open Whisper Systems' Signal server], so that both clients can exchange messages with each-other seamlessly". The WhisperPush source code is available under the GPLv3 license. In January 2016, however, the CyanogenMod team announced that they will be discontinuing WhisperPush on February 1, and recommended that its users switch to Signal. After this, Signal's server architecture will be entirely centralized.
Con Requires phone number to register
Con Code being used in Whatsapp and other parties undermines trust
It's unlikely FB would add encryption it does not have access to.