The best alternatives to Sound Event Detector are EC 2, Stringr, and Environments. 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
Amazon Elastic Compute Cloud is a part of Amazon.com's cloud-computing platform, Amazon Web Services, that allows users to rent virtual computers on which to run their own computer applications.
Environments is a historic catalog of long form field recordings created for the way you live. Whether you need to work, meditate, sleep, or any other use, Environments is the only ambient sound app based on extended recordings created in the 1960s and 70s on analog tape.