Comment by listenallyall

Why are you asking this question here? Any actual company would have reviewed all the legal documents prior to choosing a provider. The promises you seek are the exact reason "enterprise-grade" providers can (and do) charge so much.

edit: hey guess what, Netlify offers an enterprise plan, I'd bet they will be happy to offer you a "clean, legally binding promise": https://www.netlify.com/pricing/?category=enterprise