| #1 | Online Scheduling and Appointment Booking System – Bookly | 25 | 3,528 | 870 | 60k+ | | Text Domain Mismatch |
| #2 | Booking calendar, Appointment Booking System | 23 | 1,079 | 1,125 | 4k+ | | Output is not escaped |
| #3 | Bookit — Booking & Appointment Calendar | 24 | 566 | 1,456 | 4k+ | | Non-prefixed global variable |
| #4 | Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin | 25 | 960 | 738 | 60k+ | | Text Domain Mismatch |
| #5 | Appointment Hour Booking – Booking Calendar | 25 | 261 | 1,254 | 10k+ | | Non-prefixed global variable |
| #6 | Hydra Booking — Appointment Scheduling & Booking Calendar | 25 | 238 | 707 | 2k+ | | Non-prefixed global variable |
| #7 | WPS Bookings for WooCommerce | 69 | 30 | 250 | 4k+ | | Non-prefixed global variable |
| #8 | Fluent Booking – The Ultimate Appointments Scheduling, Events Booking, Events Calendar Solution | 42 | 111 | 17 | 20k+ | | Exception output is not escaped |
| #9 | Appointment Bookings for Zoom GoogleMeet and more – Wappointment | 81 | 22 | 52 | 1k+ | | Non-prefixed class |
| #10 | Booking Calendar | 56 | 16 | 40 | 50k+ | | wp function not compatible with requires wp |
| #11 | Advanced Appointment Booking & Scheduling | 83 | 11 | 13 | 3k+ | | Text Domain Mismatch |
| #12 | Timetics – Appointment Booking Calendar & Scheduling System | 99 | 2 | 3 | 2k+ | | wp function not compatible with requires wp |
| #13 | Cal.com | 99 | 1 | 0 | 1k+ | | outdated tested upto header |
