Threema is the world’s best-selling secure messenger and keeps your data out of the hands of hackers, corporations, and governments. Threema can be used completely anonymously, allows to make end-to-end encrypted voice and video calls, and offers every feature one would expect from a state-of-the-art instant messenger. With Threema Web, you can also use Threema from your Desktop. PRIVACY AND ANONYMITY Threema is designed from the ground up to generate as little data on servers as possible. Group memberships and contact lists are managed on your device only, and never stored on our servers. Messages are immediately deleted after they have been delivered. Local files are stored encrypted on your mobile phone or tablet. All this effectively prevents the collection and misuse of your personal information, including metadata. Threema is fully compliant with the European privacy legislation (GDPR). HIGHEST ENCRYPTION STRENGTH Threema encrypts ALL your communications END-TO-END including messages, voice and video calls, group chats, media files and even status messages. You can rest assured that only the intended recipient can read your chats, and nobody else – not even us. Threema uses the trusted open source NaCl cryptography library for encryption. The encryption keys are generated and safely stored on users’ devices to prevent backdoor access or copies. COMPREHENSIVE FEATURES Threema is not only an encrypted and private messenger but also versatile and feature-rich. • Write text and send voice messages • Make voice and video calls (requires iPhone 5s / iOS 10 or above) • Share videos, pictures and locations • Send any type of file (pdf, animated gif, mp3, doc, zip, etc.) • Use Threema Web to chat from your Desktop • Create groups • Conduct polls with the poll feature • Choose between a dark and a light theme • Quickly and silently reply with the unique agree/disagree feature • Verify the identity of a contact by scanning their personal QR code • Use Threema as anonymous instant messaging tool • Synchronize your contacts (optional) SERVERS IN SWITZERLAND All our servers are located in Switzerland, and we develop our software in-house. FULL ANONYMITY Each Threema user receives a random Threema ID for identification. A phone number or email address is not required to use Threema. This unique feature allows you to use Threema completely anonymously – no need to give up private information or to open an account. TRUSTED CONTACTS We let users confirm trusted contacts with a QR code or a key fingerprint to prevent man in the middle attacks. NO ADS, NO TRACKERS Threema is not financed by advertising and does not collect user data. SUPPORT / CONTACT For questions or problems please consult our FAQs: https://threema.ch/en/faq
None of the others can compare with Threema’s design and security.
Please add stickers to Threema. It’s the only feature I miss when compared to other less secure and private apps! Thank you for your commitment to privacy and security.
Web app needs serious work though.
We are calling half away around the world with very limited internet connection speeds, I mean very limited. We are amazed each time how clear and immediate the conversation can be. The stability is outstanding as well, calls are only dropped if I accidentally touch the wrong button!
I love Threema. High security messanger app. And Threema sound is very original!
I upgraded my phone and was unable to restore my credentials, even though I had them backed up to the Threema Server some time ago. I even carefully had store my backup password. I lost all the documents that my family had sent me and all their communications - very upset and deleted the app forever.
I dont know when this happened but My friend cannot send to my ID Because my ID is not exactly 8 Chars. It seems it cannot be more or less than 8 chars which were valid at some point earlier in the software history. EDIT This works correctly after investigating it further they were using the nickname and not the threema id under my profile
I love the update 8/17/2020. I like the new thumbs up and thumbs down feature but would love it if they were able to overlap if multiple people posted agree on group chats. If you agree or disagree on your own statements that would be huge as you can’t currently.
I like Threema but was horrified to discover that one cannot delete messages for everyone. I did not realize that all messages would remain on the receiver’s phone. I get confused on Threema when I have listened to an audio message because there is no indication that I have already listened to it. A check or something would be nice. If there are many audio messages and one gets interrupted, then it is unclear where to start relistening again. I do not like the red while recording messages, it is very distracting to the eye. I would prefer a milder color. I also like that in WhatsApp I can type a reply in the reply box while listening to a message but that does not work in Threema. Otherwise, I like the clean design of Threema and the privacy.
Nearly perfect, but I hope they can include an option for disappearing messages in the near future, like signal does.