The best alternatives to Drifting Ruby are Lrn, Codeplace, and Py 2.0. If these 3 options don't work for you, we've listed a few more alternatives below.
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Universal-2 by AssemblyAI— Speech-to-Text API for conversational data
Enlight is a resource aimed to teach anyone to code through building projects. Hosting a wide variety of tutorials and demos, Enlight provides developers with sample projects and explains how they work.
Mimo helps you learn how to code, right from your phone. With hands-on challenges, real-world projects, and head-to-head competitions, you can learn to build an app or website wherever you are.