These tools overlap, but they are not trying to win in exactly the same way. Codmotion is stronger when the output is a product video, app walkthrough, changelog video, or motion-first explainer built from scenes and edits. Synthesia is often evaluated when teams want avatar-led or presenter-led videos.
So the real question is not which one is universally better. It is which workflow fits the type of video you actually ship.
Codmotion does not ask AI to spit out a finished flashy video. It uses AI to understand what you want to say, then turns that into an editable scene map you can inspect, rewrite, and render only when it is right.
That matters most for app intros, product walkthroughs, and simple explainers where the goal is not "make me an AI video". The goal is "help me say this clearly through video without fighting a complex editor".
If you need a video urgently, buying a $5 credit pack and moving on can be a better business decision than carrying another monthly tool fee just in case you might need it later.