What's the best suited nocode builder to make a website like Couchsurfing?

If you want to build a full-fledged web application without writing any code, I would suggest to give a try to DrapCode (https://drapcode.com) as it has several features for developing a complete web application including design part, workflow, events, database, external APIs, notifications, etc.

Thanks.

I don't know if it's the best for your use case, but you could check out https://www.sharetribe.com/ as it lets you create marketplaces without code.

@zunanism
OLITT Website Builder - https://www.olitt.com/

You get free ssl and web hosting. YOu also get to connect your won domains for free.