Pantheon hosting alternative for Craft CMS I'm coming from a WordPress background and use Pantheon for all my client websites. I love the service they provide, especially easy migrations and multi-environments (Multi-dev feature branches, Dev, Test, Live) they provide out of the box. It helps a small company off load all the dev ops work.

We also love Craft CMS, and would like to start using it more, but are struggling to find a host that provides the same/similar amount of features and support.

I've checked out Recommended hosting company for a Craft site? but none of the recommendations include features that I'm looking for.

Here are the main features I'm looking for:

Dev, Test, &amp; Live
- Run a continuous integration workflow out of the box. Every site you create includes a Dev, Test, and Live environment connected by version control. Each has its own database, file system connection, and URL. 



Cloud development environments
- Multidev allows you to fork your entire stack (code and content), work independently, then merge changes back into the master. Each branch is an entire development environment with the same configuration as the live site. Spin up cloud environments for feature branching, per-dev sandboxes, QA environments, and more. Multidev makes it easy to manage your development workflow and keep your team’s work in sync.
From what I understand it is possible to host a Craft site on Pantheon but they will not offer the same level of support that you would get using WordPress or Drupal. This is what I've been told by Pantheon technical support, at least. 

The workflow you're looking for could be mostly set up on Heroku using review apps, however, to my knowledge they don't have the same workflow where new branches can be created with cloned content from whichever environment or branch you'd like.

I think that this would be possible by running postdeploy script from app.json, which fires once when the review app is created. You could write a script that pulls production content and clones an S3 bucket into a new one, giving you a Pantheon-esque workflow. 

If you're going to go down this route you might want the AWS CLI Buildpack, the ability to use environment variables in Craft (see Matt Stauffer's site for this) and you'll probably want to use Jaws for MySQL since, in my experience, it's much faster than ClearDB.

I'm in the same boat as you, coming from a WP heavy background and very reliant on Pantheon, so currently looking into a similar set up myself. Hope this provides some direction. 

It would be amazing if Pantheon just offered Craft support out of the box.