WhatsChat 1.3 for Mac was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this app available.
Please check the Mac app with an antivirus before launch as it is downloaded from the developer's website, and we cannot ensure that it is safe. The software lies within Communication Tools, more precisely Texting & Video calls. This free Mac app was originally created by FIPLAB Ltd.
From the developer:
WhatsChat is a Mac application for using WhatsApp. The tool is built for WhatsApp addicts who want to easily use their beloved chat app on their Mac. You simply need to run WhatsApp on your mobile device and easily pair it with this beautiful Mac client. WhatsChat securely communicates directly with the WhatsApp servers.
You may want to check out more software for Mac, such as sipgate, TRx or Instantbird, which might be related to WhatsChat.