Yes, both Trello and Opsgenie offer a Free Trial.
Trello is designed for Individuals, Freelancers, Large Enterprises, Medium Business and Small Business.
Opsgenie is designed for Large Enterprises, Medium Business and Small Business.
Pricing for Trello Starts at $5/User/Month when Billed Yearly whereas for Opsgenie Starts at $9/User/Month when Billed Yearly.
Some top alternatives to Trello includes Smartsheet, Miro, Process Street, Wrike, Notion, Freshbooks, Jira, Basecamp, Zoho Projects, monday.com, Asana, Teamwork, ProjectManager.com, Microsoft Project, Worksuite, Trackboard, Quick Base, Todoist, ClickUp, Resource Guru and Height.
Some top alternatives to Opsgenie includes Freshservice, Jira Service Desk, PagerDuty, VictorOps, Amixr, AlertOps, Splunk On-Call, Spike.sh, Mission Manager, StatusCast Incident Management and PagerTree.