The best alternatives to Slopes are Fatmap, Ski Resort List, and Carv. 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
Ski Resort List is a way to choose your next ski holiday. Find resorts based on whether they are quiet/party, luxury/cheap, have cars/car-free. Each resort also displays an adult lift pass price as well as the number of pistes/trails by level of difficulty. There is also a link to a Telegram chat group where you can arrange meet ups with snowmads.
WhereTo.Ski finds the best places to go skiing based on snow forecast, base snow depth and the cheapest flights. All in one place. So you can spend less time searching and more time skiing. It's still an MVP, so we will be improving the site along the way.