I like forestry.io. it's not API based, so you just use stock Hugo backed by git. The change you make get committed back to git. So the nice thing is you're not tied to them. If they go away, you still have Hugo and can generate manually. You can host at netlify or AWS. Most the other static CMS are API based, so all your data is with them. If the go away, aodoes your site maintainability.

I have been using https://getmesh.io/ for a while now, the developers are very helpful, the features are excellent, the underlying architecture and frameworks are great, and documentation excellent. Thumbs up.

I use Cockpit or FeathersJS.. sometimes even Wordpress WP-JSON :-/ I'm looking for something better, but not really into using a SaaS.

https://getcockpit.com

I would recommend Prismic.io. They have what I have searched for on anothers services: slices. This allows you to have different block and empower people to use them as they want to create landing pages for instance.

On the .NET side, I've had a lot of success with Umbraco, using it as a headless CMS to provide content for a Node/Express application.

https://github.com/umbraco/Umbraco-CMS

https://github.com/umbraco/UmbracoRestApi

Can we assume you’re already familiar with https://headlesscms.org?

I'm using Contentful's (https://contentful.com) free plan to power the docs and blog for my website (https://resurfaceapp.com/docs/)

I've been asking me the same question to switch a static site to basic CMS.

Contentful.com seems to be the leader.

Graphcms looks nice, GraphQL is a promising technology to only fetch the content/relations you need to render that page.

I was thinking about using Airtable for even a simpler MVP

if you are looking for an open source self hosteable option, there is directus (https://github.com/directus/directus) or cockpit(https://github.com/agentejo/cockpit)