The best alternatives to Athenascope are Vibby, ClipMine, and Hypetrigger. If these 3 options don't work for you, we've listed a few more alternatives below.
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Postman Recorder by DevTools— Export Postman APIs from browser
Search for highlights within your gameplay footage and instantly export trimmed video clips. Hypetrigger uses a custom-built video pipeline optimized for speed, using FFmpeg and Rust to decode video on your GPU. From there, it uses tried-and-true computer vision techniques: OCR (text recognition) and Tensorflow for neural network image recognition. The frontend UI is built using SolidJS, a framework optimized for highly performant UI/UX, both a downloadable desktop app and a portable web app.