Yes, both Chargebee and Post Affiliate Pro offer a Free Trial.
Chargebee is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Post Affiliate Pro is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Post Affiliate Pro begins at $129/Month, while pricing details for Chargebee are unavailable.
Some top alternatives to Chargebee includes billwerk, Subill, Zuora Billing, Billsby, ChimpCharge, Fusebill, ReCharge, Recurly and RevenueCat.
Some top alternatives to Post Affiliate Pro includes Affise, AffTrack, TrackingDesk, Refersion, Affiliatise, TUNE, OffersHub, Affilo, Promocate and Affiliatics.