Yes, both Drip and Zendesk Support offer a Free Trial.
Drip is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Zendesk Support is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Drip Starts at $39/Month whereas for Zendesk Support Starts at $19/user/month when yearly.
Some top alternatives to Drip includes Outgrow, ActiveCampaign, CleverTap, Moosend, Omnisend, MailChimp, Campaign Monitor, Emma, Automizy, Zoho Marketing Automation, Ackwire, 7Engage and Structure Pie.
Some top alternatives to Zendesk Support includes Zoho Desk, ManageEngine ServiceDesk Plus, Deskero, Support Hub, HelpDesk, Desky, Help Scout, Salesforce Service Cloud, ReadyDesk, Sitehelpdesk, HESK and BoldDesk.