Birchpress Scheduler is a WP appointment setting plugin that offers comparable (albeit slightly higher) pricing to Amelia.
This alternative plugin offers a decent appointment booking functionality and is highly rated by users.
A key advantage of Birchpress Scheduler over Amelia is that it makes it super easy to capture PayPal and Credit Card payments without the need for a third-party gateway. This booking plugin also has an extendable codebase, which means you can write custom functions to better suit your unique appointment booking needs.
A key disadvantage of Birchpress scheduler over Amelia is that it doesn’t have an active freemium version, which denies users the opportunity to get an impression of what this plugin offers before committing to the paid version.