Does anyone have any recommendations for partner management system (similar to SaaS based billing systems). We are signing up some partners (independent sales rep and some small resellers)

we use a platform called bill.com because we work with many consultants, partners and 1099 employees.  We send out an invite link to a partner, they sign up for free, enter in their bank info and get paid.  For us it has dramatically cut down on administrative hours handling invoices, billing, etc.