Checksub

Checksub has spent six years on automatic subtitling, and the focus shows in the details rather than the marketing. The script-to-subtitles converter is the standout: if you already wrote your voice-over, Checksub skips speech recognition altogether and generates synchronized subtitles you barely have to proofread, which removes the most common quality complaint about automatic captions. Voice isolation is the second real differentiator — separating music and background noise from the original voice is what lets the dubbing keep the atmosphere of your video instead of sounding like a flat replacement track. Voice cloning in 30 languages and the Beta lip-sync round out a localization stack most single-purpose subtitle tools do not attempt. Where it gets awkward is the credit economy. Subtitling costs 1 minute of credits per minute of video, dubbing 3x, and lip-sync 5x, so a 1-hour video dubbed eats about 180 credits — three hours off a Starter plan that only ships 5 per month. Translation is also capped at one translated language per project on both Junior and Starter, which contradicts the headline promise of 200+ languages unless you buy Enterprise. Unused credits survive only 6 months on an active subscription, so stockpiling does not work. Junior is limited to 1 user with no dubbing or voice cloning at all. Fit matters more than the feature list here. A solo creator adding subtitles to YouTube uploads, or a small team producing a handful of dubbed marketing clips, will get real value from Junior or Starter. A localization team pushing hundreds of videos a month should model the credit math against Enterprise from $299/mo billed yearly before assuming Checksub is cheaper than hiring out. And if you need timeline editing, Checksub's editor is for refining AI output sentence by sentence, not for cutting a film.