Choose Fly.io if you're a developer running latency-sensitive applications that require low-latency connections to users across multiple regions. It’s ideal for solo developers who can navigate a bit of operational overhead, making it a strong fit for projects needing scale-to-zero capabilities to minimize idle costs. However, avoid Fly.io if you dislike unpredictable billing or prefer the simplicity of a fully managed platform with minimal operational requirements.
On the other hand, opt for hoppscotch if you're an API developer working on a budget or an open-source enthusiast. It’s a free tool that excels in ease of access and cross-platform usage, making it ideal for testing and developing APIs without financial constraints. However, if you need more integrations or advanced features typically found in paid tools, hoppscotch may not meet your expectations.