ConvertKit offers Free Trial, but Papersign does not.
ConvertKit is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Papersign is designed for Large Enterprises, Small Business, Medium Business and Individuals.
Pricing details for both ConvertKit and Papersign are unavailable at this time. Contact the respective providers for more information.
Some top alternatives to ConvertKit includes Campaigner, Moosend and SMTP.
Some top alternatives to Papersign includes and PandaDoc.