Yes, both Campaign Monitor and Help Scout offer a Free Trial.
Campaign Monitor is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Help Scout is designed for Large Enterprises, Medium Business and Small Business.
The starting price of Help Scout begins at $20/User/Month when Billed Yearly, while pricing details for Campaign Monitor are unavailable.
Some top alternatives to Campaign Monitor includes Campaigner, Moosend and SMTP.
Some top alternatives to Help Scout includes Zendesk Support, Zoho Desk, Tidio Helpdesk, Freshservice, Freshdesk, LiveAgent, HelpDesk, SysAid, Jitbit Helpdesk, Desky, eStreamDesk, CRMdesk, ReadyDesk, Trakdesk, LabiDesk and HESK.