The best alternatives to CodePicnic are DECO, Tin, and Project Idea CLI. 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
A command line application to build and develop your projects in completely isolated environments. Save, switch and restart your environments. Choose from a variety of flavors to get the developer tools you need.
Protocode offers you to create ready-to-use remote environments for your developers, task by task. No more project install, they code in our web interface or with VS Code through ssh. You preview the rendering on private urls and close tasks when they're done!