Yes, both Constant Contact and Sender offer a Free Trial.
Constant Contact is designed for Large Enterprises, Medium Business and Small Business.
Sender is designed for Freelancers, Medium Business and Small Business.
Pricing details for both Constant Contact and Sender are unavailable at this time. Contact the respective providers for more information.
Some top alternatives to Constant Contact includes Campaigner, Moosend and SMTP.
Some top alternatives to Sender includes Campaigner, Moosend and SMTP.