Ensure you're using the latest supported PHP version and optimize settings like memory limit and execution time.
Use lightweight and well-coded templates. Avoid excessive use of images, scripts, and external resources.
Use monitoring tools to keep an eye on your website's performance and quickly address any issues that arise.
Harden your server settings. Disable unused services and ports, and configure firewalls to restrict access.
Enable 2FA for WHMCS admin and client areas to add an extra layer of security.
Implement a robust backup strategy, ensuring that backups are taken regularly and stored securely.
Enhance your WHMCS today for unbeatable performance and rock-solid security!