What is the best way to communicate with my friend on different platforms?

Clockso

So my friend plays dbd on ps4 and I’m on pc. Is there a way from dbd or from a 3rd party app that will allow us to use voice chat from separate platforms (like for example Fortnite has a built in voice chat to allow communication from different platforms)

Kernelzilla

https://forum.deadbydaylight.com/en/discussion/182483/what-is-the-best-way-to-communicate-with-my-friend-on-different-platforms

maybe both can use Discord?

it's available for android & iOS too.