We support credit cards issued by Axis, SBI, ICICI, Bank of Baroda, IndusInd, HDFC, IDFC, Kotak, Yes and HSBC. We are working on adding support for Amex, and AU credit cards. To request support for your card, please fill out this form.
Most of the supported cards should work as expected though there could be a few exceptions. You can go through the list of known issues.
Note: We don't support Onecard, super money credit cards since they don't send statements and transaction alerts over email.