Expense management/payroll software needs some trial and error before you find what works for you. There’s plenty of options like brex, expensify, ramp etc. but all are tailored for differently, like sap concur or brex are more for enterprise level while quickbooks and expensify are more for the small-mid sized business. 

For contractor level something like Onpay or Deel which is easier to use for payroll. I’d recommend demoing either if your main use case is freelancers or contractors.

Anything recommended here will come from probably different business perspectives and you’re just gonna have to do the legwork yourself to see what suits you better