The best alternatives to Quirk are Deeply, Joyable, and Beyond the Pitch. If these 3 options don't work for you, we've listed a few more alternatives below.
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AssemblyAI— The most accurate API for conversational speech-to-text
Deeply is an inviting, colorful experience where visual styling, animation, a soft guiding voice, and music will help you to get to the relaxing state.