Klutch.sh is a powerful cloud platform that empowers developers and businesses of all sizes to effortlessly build, deploy, and scale their applications with ease without having to manage infrastructure.
The docs, apparently is still under construction. But, it has similar features to fly.io & Render. They have more regions, support for more computing power, and a simple but powerful user experience. They don't have a free plan, but they do give $100 in free credits to new users to try out the platform. All in all though, fly.io, Render, Railway and Klutch.sh pretty much all have comparable features - it's really a matter of personal preference.