Yes, both Eventzilla and OnePlan offer a Free Trial.
Eventzilla is designed for Large Enterprises, Medium Business and Small Business.
OnePlan is designed for Large Enterprises and Medium Business.
Pricing for Eventzilla Starts at $1.50per Registration whereas for OnePlan Starts at $65/Month.
Some top alternatives to Eventzilla includes Eventbrite, EventBank Event Management Platform, Evvnt, EventBrew, Event Always, Eventboost, Eventsair, Eventene, EventPro Software and Eventify.
Some top alternatives to OnePlan includes Jira, Smartsheet, monday.com, Social Tables, Joi, SoPlan, Eventsair, Grenadine Event Planner, EventERP and EventMapStudio.