Yes, both Zendesk Sell and ClickUp offer a Free Trial.
Zendesk Sell is designed for Large Enterprises, Medium Business and Small Business.
ClickUp is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for Zendesk Sell Starts at $19/User/Month when yearly whereas for ClickUp Starts at $7/User/Month when yearly.
Some top alternatives to Zendesk Sell includes Pipedrive, HubSpot CRM, ClickUp, Freshsales, Salesflare, Close, Vendasta, Keap, Hubspot Marketing Hub, Zoho CRM, Salesforce, Thryv, Pipeliner CRM, SalesCRM, SimpleCRM, Snapforce CRM, Salesforce Sales Cloud and Pipeline CRM.
Some top alternatives to ClickUp includes Basecamp, Trello, TeamGantt, Asana, Teamwork, ProjectManager.com, ProWorkflow, nTask, Todoist and Height.