PrivyTalks is described as 'Safe chatting Send confidential information like passwords, emails and credit card numbers safely over an unencrypted network. No third-party involved' and is an website in the Social & Communications category. There are more than 10 alternatives to PrivyTalks, not only websites but also apps for a variety of platforms, including Windows, Linux, Android, Android Tablet and Mac. The best alternative is Telegram, which is free. Other great sites and apps similar to PrivyTalks are Element (Free Personal, Open Source), Tox (Free, Open Source), Jami (Free, Open Source) and Threema (Paid, Open Source).
Element is a secure collaboration and messaging app based on the Matrix protocol. It’s decentralised to deliver digital sovereignty, and based on an open standard for easy connections and interoperability. It is end-to-end encrypted by default.
Jami (formerly GNU Ring, SFLphone) positions itself as a potential free Skype replacement Open Source and cross-platform. Jami gives you a full control over your communications and an unmatched level of privacy.
ChatSecure is a free and open source messaging app that features OTR encryption over XMPP. You can connect to your existing accounts on Facebook or Google, create new accounts on public XMPP servers(including via Tor), or even connect to your own server for extra security.
An alternative Telegram client based on TDLib, with higher speed, slicker animations and experimental features. The goal of Telegram X is to reinvent Telegram and explore new frontiers in speed, ease of use, quality of animations and all other aspects.
Technitium Bit Chat is a secure, peer-to-peer (p2p), open source instant messenger designed to provide end-to-end encryption. It can be used over Internet and private LAN networks for instant messaging and file transfer.
Off-the-Record (OTR) Messaging allows you to have private conversations over any instant messaging (MSN,Gtalk, Facebook and so on) by providing encryption, authentication, deniability, perfect forward secrecy