Tox has received a lot of criticism for originally implementing non-standard encryption and being difficult to use. Although claimed by developers to be easy to

Tox has received a lot of criticism for originally implementing non-standard encryption and being difficult to use. Although claimed by developers to be easy to use for anyone, Tox suffers from overengineering. Clients have many layers of abstraction copied from Skype which makes it difficult to audit and to submit pull requests. Overall, however, clients have a very good ease of use and look aesthetically pleasing.