Contentful is the first developer-oriented CMS that actually appeals to businesses and marketers. I've had more than a few nightmares with the Adobe Marketing Cloud but most big businesses just automatically gravitate to those kind of products. Developers always want simple, easy to deploy and configure and something API-driven. Business wants drag and drop, dashboards, analytics and workflows and other nonsense. Contentful is the first CMS I've seen that is extremely developer-friendly, but is pretty enough to give the business folks confidence. You guys just need more of a spiel on your landing page to appeal to the marketers.
It's now a series C startup with over 200 employees and customers like Spotify, WeWork, Samsung, Nike, Jack in the Box, The British Museum
(I work there)