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Threema

Threema is the world’s favorite secure messenger and keeps your data out of the hands of hackers, corporations and governments. Threema can be used completely anonymously, and offers a rich set of features.
PRIVACY AND ANONYMITYThreema is designed to generate as little data on servers as possible – this is a core part of our concept. 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 meta data.

HIGHEST ENCRYPTION STRENGTHThreema encrypts ALL your communications END-TO-END including messages, 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 user’s 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
• share videos, pictures and locations
• send any type of file (pdf, animated gif, mp3, doc, zip, etc.)
• create groups
• conduct polls with the unique 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)

FULL ANONYMITYEach 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 CONTACTSWe let users confirm trusted contacts with a QR code or a key fingerprint to prevent man in the middle attacks.

INDEPENDENT COMPANYWe are a 100% independent and self-financed company in the heart of Switzerland with its own servers and in-house software development. Switzerland is a country with some of the most user friendly privacy laws in the world.

PERMISSIONSThreema is a private messenger, but it still requires the following permissions (only used if the corresponding functionality is requested).


• Read your contacts / modify your contacts: used for address book synchronization. When the synchronization is turned off, your contact data is not read or modified.
• Precise location (GPS and network based): used for "send location" feature.
• Add or remove accounts, find accounts, create accounts: required for contact synchronization and integration in Android's account management.
• Modify or delete the contents of your USB storage: required for storing media files (images, videos, audio).
• Threema's functionality can be further extended by separately downloadable plugins which may require additional permissions (e.g. access to camera, microphone).

SUPPORT / CONTACTFor questions or problems please consult our FAQs: https://threema.ch/en/faq.html

Category : Communication

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Reviews (26)

Cha. May 25, 2022     

If you like having private conversations, this is the communication app you've been looking for. I spent months researching different solutions before choosing Threema, given most apps in this space have been proven insecure. Threema was the only app in the category that actually provided a viable solution and maintained a quality user experience. Since moving to it, the people I talk to regularly have had no issues learning the platform.

Yaw. G. Apr 26, 2022     

It would be nice if you could see the whole video when making video calls. As of now, the video is cropped to fit full screen both in portrait and landscape orientation, so you only get to see the center part of video feed.

awa. May 22, 2022     

The chat features are clunky; I have to click three dots to delete a message. The dislike features do not appear to be beneficial. I despise it when my phone vibrates excessively only to respond to a message. Quote appears to be nothing more than a respond button. Please remove the options from the 3 dots that users use the most and replace them with buttons in the 3 dots that are not often used.

Mar. S. Mar 17, 2022     

I recently purchased Threema app and tried setting a new account. Inadvertently, I uninstalled the app and tried setting up the account multiple times and now I'm not allowed to set up an account. I see the message TA001: VP003: Too many IDs created for this purchase. Please help me in setting up the account.

Jua. R. Apr 22, 2022     

Threema is a must have for anyone who cares about privacy and security. I use it as my main medium of communication w/ my family and some friends. I'm working hard/educating the rest of my family and friends to use threema. I kindly ask the developers to add the option to change the bg-color of received messages. The white text on light-gray-bg has proven difficult to read for some of the older members of my family. Also, please consider adding a time-base disappearing messages.

Jea. H. Mar 20, 2022     

A fantastic privacy focused messaging app. The developer has improved the app with each update, although some messages can be delayed when sending via mobile data, though this isn't a huge issue for me.

TJ. Apr 2, 2022     

Complete amenity and disassociation to email or phone number seems to be an overreach, because the application is automatically associating itself to the primary email address you are logged on to when you purchase through the Google Store. Not sure what weakness this will lead to yet... More to follow.

Ano. N. Apr 16, 2022     

(Updated April. 8) All work out fine except you cannot retract anything like BBM does. I understood what Threema explain about retractable msgs isn't safe. How about Disappear msg in certain time elapsed? Such as Signal did? I'd give it 5 stars if Threema msgs can be time-up disappear.

Imr. M. May 16, 2022     

Waste of money. I bought this app and when I started setting it up it says purchase could not be verified. I tried it many times but it looks like this app is a scam.

Nat. T. May 3, 2022     

Every time I install Threema I loose photos from my gallery. I begun taking five to six photos each time and if I am lucky I have one of these. The moment I uninstall Threema that problem is gone.

Dav. M. Feb 18, 2022     

Excellent app! I've used many private messenger apps over the years and this one is best; well worth the cost. The only features that are missing: 1) last online date/status for existing contacts; 2) A "Notes" section for each contact so users can store personal info related to that contact such as birthday, anniversary, job info, how they met, etc.; and 3) the ability to override a contact's default profile pic on the user's device so that a contact's default pic is only used if not overridden.

Hau. J. Apr 24, 2022     

Great app! The only messenger that works without using the phone number. The phone functionality good work better though, sometimes the connection is difficult or breaks

r0b. 1. Dec 26, 2021     

There is this problem that sending images or videos takes a very long time. Please fix it, it is very annoying. Also the maximum size of files is way too low. Please make sending videos without compression (as toggled in the settings) possible again, aswell as sending large files.

Den. B. Feb 14, 2022     

Fails to fulfill it's only purpose : "RELIABLY deliver messages and notify me about new messages" Every now and then no notifications occur. Or it doesn't update between Desktop and mobile. I don't care about fancy features, all I want is a fast and reliable messenger (with a transparent business model and privacy policy (otherwise I'd just use Whatsapp)) .

Sha. W. Apr 22, 2022     

I'm a little confused. So do my contacts have to have threema too or the qr code? I won't be able to just set it as my default messanger and receive all messages through here? I tried to text someone and it required threema id.

Dav. C. May 3, 2022     

Works great, it's affordable, and no phone number or email is required. Only drawback is not many of my friends use it yet.

Ste. A. Feb 10, 2022     

Great app, I was in the process of implementing this across my company but we found a few issues that are show stoppers for now. Messages that are to self delete need the option of deleting in say an hour, 2 hours, sensitive communications needs not be lingering around on someone's phone for excessive amounts of time. Also. When a conversation is deleted. It must delete on all devices that are privy to that conversation. Threema does solve a lot of communication issues. I can't wait for these fu

Moh. A. Feb 27, 2022     

It's secure apps for chats and call. There should be some modifications,chat notification didn't get instantly, usually takes 1 to 2mins. Delete for everyone options should be added for more security and peaceful experience. Hope you will look into it.

Jer. P. Mar 31, 2022     

European servers, European app. Very secure for messaging without having to sacrifice convenience. Supports a dark theme.

Jul. K. Mar 8, 2022     

Very nice app, clean video calls and a lot of customization, but unluckily lacks self destructive message.

ö. N. M. ö. Dec 18, 2021     

HAS: Anonymity & privacy: email address/mobile number are not needed for registration & there's no online status: outranks Signal, Telegram & WhatsApp! LACKS: Screenshot & data forward control to prevent recipients from taking screenshots, copying, downloading/forwarding chats (some other apps provide either or all); Features to immediately delete erroneously sent messages and change Threema ID while retaining previous messages/media. Schedule Send messages feature will be the icing on the cake.

Lau. G. Feb 14, 2022     

Hi Threema, I really like your app and find it appropriate for a secure conversation. However, are there any chances to implement a audio/video group call in the app, insted of being limited just to 1 to 1 calls? Thanks!

Ala. R. Mar 12, 2022     

I really enjoy the privacy and security Threema offers. It has a lot of great features and is easy to use.

Mar. O. Dec 14, 2018     

It is a very secure messaging app. If you want to be sure nobody ever gets access to your data, Threema is an excellent choice. The push notifications didn't work on my Galaxy A8 at first, but there's a troubleshooting page that explained how to fix it and they work now. Using multiple devices with one account is very difficult with Threema. That's probably the biggest drawback for me.

Rob. C. Jan 19, 2019     

Its a very good app especially if you take privacy seriously, the company is completely user funded so they dont sell your data. Notifications are pushed so you dont need to check regularly. You can make phone calls.. I like that there's no ads or any annoying features. A small feature that I like is that you can change the wallpaper for conversations with specific people.

Lee. T. Aug 16, 2020     

Consistently exceeds expectations! I have used Threema for years and, if they had stayed with the earliest versions of the app, I'd still purchase it! In addition to the encryption and security, they have continually added features that aren't seen elsewhere with the encryption and security Threema provides. If someone with whom I regularly communicate does not already have it, I purchase it for them. For everything Threema provides, especially at the price, it's ludicrous to not have it!