Intercom: AI Customer Service

The intercom app is great in general and can be integrated simply on most of the basics Shopify websites / themes and it's good for conversion if you can use it properly (we mostly use the live chat functionnalities). The pricing is a bit weird and it can get expensive if you keep all the contacts but it's easy to adapt to different kind of scenarios.

*If you have a custom theme or web app or if you don't want to use the default intercom themes you might have to do a bit of development work in order to make it work seamlessly and efficiently but it's nothing to complicated and their doc is good enough.