The best alternatives to Specialist are Advice.vc, Expert Republic, and Vidiwise. 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
Expert Republic is a mobile app where you can find experts from various industries, pay and book a video consultation with them. You can book a Personal coach, Mindfullness coach, Startup mentor, Counsellor, Language trainer, chef, and many more!