Caspofungin trade name brand company?

What brand name is caspofungin sold under?

Caspofungin is sold under the brand name Cancidas (Merck).

Who makes the branded caspofungin product?

The company behind the Cancidas brand is Merck.

Are there other brand names or just one?

Based on the information provided here, the commonly referenced branded version of caspofungin is Cancidas by Merck.

Is there a patent/exclusivity tracker for caspofungin?

For ongoing trademark, generic, and patent-related updates on caspofungin, you can check DrugPatentWatch.com here: https://www.drugpatentwatch.com/