StealthTalk: Private Messenger

In-app purchases
208 reviews
Content rating
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About this app

StealthTalk is a private messenger designed to meet high demands of business- and privacy-minded professionals. Based on a patented SDNP protocol developed for professional use in telecommunications, StealthTalk bridges the gap between professional and consumer security solutions.


Secure Voice Calls
Make secure calls with exceptional voice quality, even with slow internet connection speeds based on TETRA professional communication standards and SDNP protocol.

Secure Messages
Exchange true end-to-end encrypted messages with all sensitive message data encryption and decryption taking place entirely on the user device.

Self-Destruct Messages
Send confidential messages that are erased automatically after a selected period of time.

Stealth Mode
Protected stealth environment for sensitive calls and messages that requires users to enter their password to preview messages or receive calls.


End-to-End Encryption
All communication within StealthTalk is always protected with end-to-end encryption powered by a patented SDNP protocol that uses ECC 512, AES 256 and SHA-3 512 as primitives.

Zero-Knowledge Proof
StealthTalk knows nothing about the content of your messages or calls. User data is not collected or stored on StealthTalk servers and cannot be analyzed, sold or disclosed.

Professional Telecommunications Technology
StealthTalk communication security is based on the patented, tried and field-tested SDNP protocol developed for and used in professional telecommunications.


StealthTalk requires the following permissions to deliver its private messaging services and ensure all features are operational.

Contacts: Contacts permission is used to match you with your contacts using phone number hashes. StealthTalk does not monetize, collect or store your address book data.

Microphone: Microphone access is required to make secure voice calls.

Bluetooth & Location: Bluetooth and location access is needed to locate devices close to you and enable encryption key exchange.

Camera: Camera access is needed to add new contacts via QR code and send pictures with the built-in camera.

Storage: Storage access is needed to store images and files that you receive in chats.

For additional information and suggestions, please contact
Updated on
Mar 16, 2023

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info
Data is encrypted in transit
You can request that data be deleted
208 reviews
A Google user
February 3, 2020
Tried on 3 separate occasions over the last 6 months to install the app on two different Android phones. The devices I used for these failed attempted installations were on a fully unlocked Google Pixel 2 XL, and a fully unlocked Google Pixel 3 XL. Both phones have active phone service with "Google Fi". Both phones were running on the newest version of Android during their respective attempts. Today's attempt was on the latest and greatest no-bloatware Android 10 (on both phones) and the app does install, but after confirming your phone number, it asks for "the code," but the 'code' never works (on any of the attempts on any of the devices). In addition, thinking I'm not using the correct 'code' -I've tried the code supplied by the StealthTalk messaging the phone, and I've tried my phone's unlock screen code (because the app doesn't specify what "code' it's wanting you to use, but it doesn't matter, because none of the codes work anyway! - well, I'm tired of trying to find out why the app fails to work. After many useless attempts, my patience is gone - Off to the next app! I hope that the dev team starts performing some QA on each update, to make sure that their work actually functions. Good luck!
5 people found this review helpful
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StealthTalk Inc.
February 4, 2020
We appreciate your feedback, jôÑÃTHâñ! Unfortunately, some mobile carriers offer inconsistent delivery of SMS verification codes required for registration. We are already looking into solutions. In the meantime, if you would consider giving StealthTalk another go, please contact so we could assist you with the registration.
A Google user
January 4, 2020
Fantastic platform and high security. If you are a security expert you can value the data transmission and reception protocols. If you are the sort to like the Mission: Impossible spy type graphics and animations you will love it. All in all I give it 10/10.
76 people found this review helpful
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April 3, 2021
Dishonest. Plain and simple. There was no indication this is a free trial to a subscription and I only found out after installing and registering. And despite looking in the app and on the website there is no indication of the cost of this subscription, which in itself seems rather sinister to me.
3 people found this review helpful
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StealthTalk Inc.
April 7, 2021
Thank you for your feedback! It was never our intention to hide the cost of PRO subscription. Your feedback has brought our attention to the lack of transparency in subscription pricing. We have already made changes to our website to make pricing more clear. Please note, after the PRO trial expires you can continue using StealthTalk for free.

What's new

- Added Support features
- Fixed minor bugs