2018- Ongoing

Silent phone

Project overview

Back in the time when mobile messaging apps stored messages in plain text and calls could be eavesdropped we were approached by a revolutionary American based startup who believed that messaging and VOIP calling should be secure, and that such security should be publicly provable not just declarable.

During our cooperation we have delivered and maintained a secure VOIP calling and messaging mobile app integrating a Latvian made VOIP engine.With Silent phone we had the unique chance to collaborate with the inventor of ZRTP Phil Zimmerman and pioneer the Diffie-Hellman algorithm with SAS verification

Project duration
2018 - Ongoing
Team size

App functionality

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A service that adapts the information to the appropriate format by collecting data and transforming it correctly


By analysing the product we understood that we have to create a UI that is friendly for the users, since the security/encryption part might be very fustraiting for the average person. Our proposed UI is following general Apple and other messeging UI guidelines in order to make usability similar to other messaging/calling apps, but with security elements in mind.

Helping to take the Silent phone app to customers we made a clean mobile UI, integrated and maintained the Tivi VOIP engine along with our own forks of zrtp, and message encryption libraries.


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Whats next?
1. Our expert will contact you about your bussiness requirments
2. If needed we will sign an NDA
3. We will send a proposal, estimates, deadlines for your project
4. A team will be assembled for your project needs

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SIA Thinkitive Lab
Beberbeku iela 46,LV-1029, Riga
Nr. 404569830434
Bank: Swedbank