The best alternatives to Dodub are Dubsmash, Modulate, and Kudo Voices. If these 3 options don't work for you, we've listed a few more alternatives below.
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AssemblyAI— Speech-to-Text API with superhuman accuracy
We create realistic and fully customizable voice skins, to give you complete vocal freedom right as you speak. Try it for yourself or enable voice skins in your game, app, or other platform.