FetchSandbox runs entirely on AWS. Every sandbox, every spec's engine, and every reproduce→prove run — where we spin up two containers to prove a bug is real, then tear them down seconds later — happens here. As a solo founder I started on Lightsail for dead-simple, predictable hosting, and the best part is knowing the rest of AWS is right there when I need to scale, without a migration. It's the boring-in-the-best-way foundation: reliable enough that I think about my product, not my servers.