The best alternatives to ConfigCat are Bearer, elasticode, and Taplytics. 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
Universal API client to call any API in 2 minutes, Monitoring platform to manage all your integrations.
Monitor API usage across your source code. Detect anomalies and remediate issues.
Elasticode helps mobile app owners create & deliver personalized onboarding experiences, making sure app installs don't just turn into one-time visitors, but into actual returning users.