Sources

Primary sources checked during the September 2026 SpeedStack build. Product information can change.

• WP Rocket licensing/pricing (official) — Official page shows Single, Plus and Multi licenses, with site limits and current listed annual pricing.
• WP Rocket Remove Unused CSS docs — Official documentation says Remove Unused CSS keeps used CSS per page and is the recommended CSS delivery method.
• WP Rocket Reduce unused JavaScript docs — Official docs state WP Rocket does not remove unused JavaScript; Delay JavaScript Execution can delay problematic files.
• WP Rocket + Autoptimize docs — Official docs say WP Rocket detects overlapping Autoptimize options and prevents duplicate activation.
• WP Rocket discounts page — Official discounts page describes recurring promotional campaigns and newsletter promotions.
• WP Rocket Rocket Insights — Official page describes tracking LCP, CLS, TBT and TTFB and recommends WP Rocket features.
• FlyingPress pricing — Official pricing page lists Starter, Pro, Business and Unlimited plans and a 14-day trial.
• LiteSpeed Cache docs — Official docs explain that LSCache's server-level caching depends on LiteSpeed server products.
• Perfmatters features — Official page lists script management, lazy loading, database optimization, defer/delay JS, resource hints and other controls.