Comment by BoorishBears

I used Backblaze and strongly regretted it.

Wonky bandwidth limits and throttling are my main problem, but also had some issues with login at one point which apparently wasn't unique to me. Would never trust it for anything mission critical after that.

The nice thing about S3 is even if you screw up your usage patterns, you can pay/engineer your way out guaranteed. You can slurp up as much data as you want as often as you want and it may not be cheap, but it will work and it can be made extremely fast.

I'm coming to find that's not universal for these S3 compatible services. Really scary to build a business knowing that.