Threema – The Secure Messenger

Threema is a proprietary and paid end-to-end encrypted instant messaging service that allows users to send messages, and make phone calls and video calls in secure conditions. Your data will be kept from hackers, corporations, and government intrusions by being encrypted even in transit.Each user will receive a random Threema ID without providing personal information or signing an account. One of the reasons Threema has such a high level of security is that the developer, Threema GmbH, is based in Switzerland, so it must comply with the standard protection rights of Europe's endless advisors (GDPR).Currently, the app is priced at $4.99 and supports numerous languages: English, Basque, Czech, Dutch, French, German, Italian, Japanese, Simplified Chinese, etc. It's compatible with Android 4.0 and above, iOS 6.0 and above, and Windows Phone 8 and above.

Highlights:

Encryption

With full-time E2E encryption and an absolute minimum of unencrypted data to corporate servers, it’s definitely a secure messaging app. Anything stored on the company’s servers is temporarily there. As soon as a message is sent, the message itself, along with associated metadata, is deleted from the server.

Message Protection

Threema allows you to protect your private chats and hide them from the chat list on the Threema home screen so that no one else can see your confidential messages. Notifications you receive for private chat messages also don’t have message previews.To do this, press and hold a conversation you want and select Mark as private. You will then be prompted to create a PIN, which you will have to enter each time you want to display a private chat.

Data Saving

Threema stores your data on the relevant devices. The system does not need to store a minimal amount of metadata on its servers to receive messages delivered to their destination. When that happens, the metadata is removed.Data stored on the device is AES-256 encrypted for maximum security. This includes media files that have been sent over the Threema network.

Media Library

The media library is also equipped with image recognition so you can search for photos by entering certain keywords. This saves you the trouble of searching through countless images on your device. Because the recognition is done locally, the image never leaves your device, but if you’re not comfortable with this feature, you can choose not to enable it.

Search

With global search, you can search across all your chats at once, instead of searching individual chats.

Threema Web

Threema.Web is a web browser-based interface for a Threema-equipped mobile device. You configure Threema.Web to work with a specific mobile device running the Threema application. This is not a standalone product with its own Threema ID. It’s just a way to control the Threema app on your phone using a computer.

Tips for Users:

Utilize End-to-End Encryption: Take advantage of Threema Work's end-to-end encryption feature to ensure that all your communication remains secure and confidential, especially when sharing sensitive information within your team.

Customize Notifications: Adjust your notification settings to receive alerts only during working hours, helping you stay focused and productive while using the app for business communication.

Collaborate Efficiently: Create group chats for team collaboration, share files and media, and leverage features like text formatting and polls to enhance communication and productivity within your organization.

Pros and Cons:

Pros

Pay once, chat forever

Use Threema as anonymous

No collection of user data

No ads

No phone number required

Simple user interface

Using a third-party server for backup

Great features for group chat: smart replies, creating polls in a group chat, share videos, pictures, locations, or any type of file

Use Threema Web to chat from your Desktop

Synchronize your contacts

Cons

Only compatible with certain Android, iOS, and Windows operating systems

Not free to use

A relatively small number of users

Not support two-factor authentication