The best alternatives to Sift Science are Stripe, RunwayML, and Revively. 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
DyScan is an SDK that helps apps stop fraud and process payments faster by taking a picture of users' credit cards. It reduces user friction, stops fraud, and works on all credit card formats.