Do not choose by language count alone. HeyGen lists 175+ languages and dialects on paid tiers, Synthesia markets broad dubbing and voice coverage, and Colossyan lists 120+ supported languages, but bad lip-sync will still make a translated video look cheap.
Check what actually gets translated. Colossyan says avatar narration, on-screen text and interactive elements localise together in one workflow. Synthesia AI Dubbing translates spoken audio only, so original on-screen text needs separate handling.
Do the credit maths before you localise at scale. HeyGen lists full video translation with lip-sync at 5 credits per minute, while audio dubbing without lip-sync costs 2 credits per minute. Synthesia’s self-serve credit rules list AI Dubbing with lip-sync at 240 credits per minute.
Test one 60-second script before buying annual seats. Localise the same video into Spanish, French, German and Japanese, then score mouth timing, pronunciation, captions, translated text, render speed and export friction.
Match the tool to the job. Start with HeyGen for multilingual marketing and creator videos, shortlist Synthesia for enterprise training, and compare Colossyan if you need interactive course workflows or a multilingual player.
Treat Hour One as a verify-before-buying option for multilingual presenter workflows. Capterra lists Lite at $30/month billed annually, but buyers should confirm current vendor pricing, language coverage and export terms before committing.
