Yes, both Close and Mailgun offer a Free Trial.
Close is designed for Individuals, Freelancers, Medium Business and Small Business.
Mailgun is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Close begins at $9/user/month when yearly, while pricing details for Mailgun are unavailable.
Some top alternatives to Close includes Salesforce Sales Cloud, monday sales CRM by monday.com, Thryv, Zoho CRM, ClickUp, Freshsales, GoCRM, SimpleCRM, FIVE CRM, webCRM, Cratio CRM, DigitalCRM.com, Alore CRM, Truly, Pipeline CRM and CRM.io by 500apps.
Some top alternatives to Mailgun includes SMTP, Campaigner and Moosend.