Hi, what benefits i will get with "professional integration"(Hotspot and Salesforce etc)?

Hi Andrey - the Hubspot, Salesforce, and Infusionsoft integrations are only available on the Pro99 plan and up, so unlocking the professional integrations just gives your account access to use those.

Please note that as our Salesforce integration uses their API to communicate, your Salesforce account will also need API access.