Hi @SLink ,
I’m don’t know what is the behaviour of jabber so : " which should be able to provide the incoming caller id" will not help me a lot xD.
For your usecase you have to know that it’s not an easy project : You can’t open a hubspot contact page without knowing his internal id. To display contact information from hubspot during call you will need a custom script which interact with the hubspot api and retrieve contact information according to his phone number and display it in a browser or a window
I think that use a web based version of jabber with be easyer for your project.
If you are a good developer you can achieve it by your own, if not you will need an agency.