You can confidently use SnapEngage as an alternative to Intercom.
And, you can get a free trial for a period of 30 days to try out the Enterprise version.
It also has a transcript archive where you can save every conversation to a searchable database, which makes this the best live chat plugin for learning more about your audience.
Next install the : Once installed, go to the Head, Footer and Post Injections plugin settings and insert the following script injection into the Desktop and Mobile Check the Mobile checkbox BEFORE THE CLOSING TAG FOOTER.
And with the free mobile app, you can communicate with your website visitors from anywhere.
You can find full instructions on signing up and installing Intercom using the WordPress plugin.