I will use those resources when I deploy a nice app.

Thank you for comment! I deployed some projects in those websites and they are doing great! So anyone can use these providers without paying any money.

Actually, I used each and every website and found what the website supports. Static sites can be deployed on every website and all the websites are doing great. For backend apps, only a few support like heroku, vercel, glitch, stormkit. The recommendation will be heroku & vercel for any app!