No, the security deposit is not debited from your bank account.
There is no impact to your bank credit limit when you secure your deposit through Swikly. We only make a 0€ transaction on your bank account to check your creditworthiness.
Depositing your security deposit online does not impact your purchasing power by leaving your credit limit untouched : You can fully enjoy your stay.
However, this depend on your rental company. the case you carry a cost, a message will tell you the amount charged on your bank account after entering your bank card information.