A free, open-source alternative known for its visual sync interface and error detection, useful for basic QA. However, it may lack the advanced, dedicated support of a professional, "verified" platform like Spot.
Verified software costs $15–$50/month or a one-time license of $200–$500. However, the cost of re-doing an entire 90-minute film because of unverified spotting errors is easily $2,000+ in editor hours. Verification is an insurance policy. spot subtitling software verified