Yes, both Billgist and Chargebee offer a Free Trial.
Billgist is designed for Individuals, Medium Business and Small Business.
Chargebee is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
The starting price of Billgist begins at $25/Month when Billed Yearly, while pricing details for Chargebee are unavailable.
Some top alternatives to Billgist includes Billable, Invoice2go, Billbooks, ChimpCharge, Billin, CloudBooks, AdvancedBilling, Billogram, Zenskar and Billisimo.
Some top alternatives to Chargebee includes billwerk, Subill, Zuora Billing, Billsby, ChimpCharge, Fusebill, ReCharge, Recurly and RevenueCat.