Hi Kamal,
You've got a few different options here. As you mentioned, Data Sources require some processing time and are often set up as a nightly feed, so I'll skip that one.
A hard-coded beacon could certainly be set up to push data into Adobe Analytics in real time. Depending on your options for client-side code that can be added to the CRM interface, you may be able to use a standard JavaScript beacon. You can head to Admin > Code Manager to see all the different languages that are available to send data to Adobe (in addition to a hard-coded img beacon). JS, Java, PHP, Silverlight, .NET, IIS, and more are listed there.
Another option would be to leverage our Data Insertion API. This is processed just as quickly as a standard analytics beacon, so it meets your requirement for real time. It's a RESTful API, and there is LOTS of great info on it here: https://marketing.adobe.com/developer/documentation/data-insertion/c-data-insertion-api
Regarding Demandbase - I'm not sure that I'm following. Are your customers logging into your Salesforce instance? You may alreayd know this, but Demandbase leverages an IP-based reverse lookup, so Demandbase would report on the company associated with the visitor to Salesforce.com. For example, if I have my own instance of Salesforce, with Demandbase reverse-lookup enabled on it, and my customer at Widgets R Us logs into my Salesforce instance from their office, then Demandbase would report on Widgets R Us. I hope that helps!
- Eric
