Yes, both Billisimo and ChargeOver offer a Free Trial.
Billisimo is designed for Medium Business and Small Business.
ChargeOver is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Billisimo begins at $39/Month when Billed Yearly, while pricing details for ChargeOver are unavailable.
Some top alternatives to Billisimo includes Confluence, OneBill, billwerk, Servicebot, Subill, Billsby, Billin, Fusebill, CostTeam and Zenskar.
Some top alternatives to ChargeOver includes and undefined.