Simply Static: Set up a build to run daily with cron.

functions.php

<?php

register_activation_hook( __FILE__, 'setup_build_cron' );

/**
 * Setup a cron job to run daily.
 *
 * @return void
 */
function setup_build_cron() {
	if ( ! wp_next_scheduled( 'run_scheduled_build' ) ) {
		wp_schedule_event( time(), 'daily', 'run_scheduled_build' );
	}
}

add_action( 'run_scheduled_build', 'run_build' );
/**
 * Executable function to run a build with cron.
 *
 * @return void
 */
function run_build() {
	$build_id = 123; // Add the id for your build.
	update_option( 'simply-static-use-build', $build_id );
	$simply_static = Simply_Static\Plugin::instance();
	$simply_static->run_static_export();
}