Waves Vocal Rider VST plugin is a professional tool for automating vocal levels. It is a paid product
If you are looking for a completely free "rider" style plugin, consider these reputable options: Vocal Rider® Plugin - Waves Audio
; a legitimate "free download" for the full version does not exist. However, you can access it legally via a 7-day free trial or use high-quality free alternatives. Product Overview Waves Vocal Rider
: It can write an automation track to your DAW, allowing you to fine-tune the levels manually afterward. Dual Versions