Yes, both OnePlan and Smartsheet offer a Free Trial.
OnePlan is designed for Large Enterprises and Medium Business.
Smartsheet is designed for Freelancers, Large Enterprises, Medium Business and Small Business.
Pricing for OnePlan Starts at $65/Month whereas for Smartsheet Starts at $9/month when yearly.
Some top alternatives to OnePlan includes Jira, Smartsheet, monday.com, Social Tables, Joi, SoPlan, Eventsair, Grenadine Event Planner, EventERP and EventMapStudio.
Some top alternatives to Smartsheet includes Quickbase , ClickUp, Zoho Projects, Jira, Microsoft PPM, Trello, TeamGantt, monday.com, Asana, Teamwork, ProjectManager.com, Microsoft Project and Airtable.