Oh, interesting! Thanks for that link, I hadn't managed to come across that when I was looking for existing alternatives.

I'm not sure I would have actually started building this if I knew that was an option. Hopefully their existence is telling me "there's a market, go for it" and not "there's already a better alternative, don't do it", heh. Though their pricing tiers really tells me I need to optimize my sandboxing. I don't think I can match those request limits at those prices just from the CPU cost of my per-request sandboxing overhead.

My first thought too!