Neither OpenedOrNot nor Email Tracking for Zendesk offers a free trial.
OpenedOrNot is designed for Medium Business, Small Business and Individuals.
Email Tracking for Zendesk is designed for Large Enterprises, Small Business and Medium Business.
The starting price of Email Tracking for Zendesk begins at $1.67per user / month when Billed Yearly, while pricing details for OpenedOrNot are unavailable.
Some top alternatives to OpenedOrNot includes and undefined.
Some top alternatives to Email Tracking for Zendesk includes and undefined.