[Cthulhu_]

But you can outsource those (build server, CMS) to e.g. Netlify and Contentful.

But if you don't want that, there's a billion alternatives; the CMS market is one of the most saturated ones out there.

[subpixel]

I actually feel like Gatsby will be developing a CMS to round out their paid feature-set. I have zero-inside knowledge, just a hunch that to get customers to pay up handsomely, the product needs a deeper "fit" in the publishing pipeline.