Yes, both Nimble and Constant Contact offer a Free Trial.
Nimble is designed for Freelancers, Medium Business and Small Business.
Constant Contact is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Nimble begins at $24.90/User/Month when Billed Yearly, while pricing details for Constant Contact are unavailable.
Some top alternatives to Nimble includes Salesforce Sales Cloud, Pipedrive, Thryv, Vendasta, ClickUp, Zoho CRM, Agile CRM, Teamwork CRM, Team365, Gro CRM, GoCRM, SimpleCRM, Simply CRM, CRM.me, iGlobe CRM Office 365 and CRM.io by 500apps.
Some top alternatives to Constant Contact includes Pipedrive, Campaigner, Moosend and SMTP.