Contentful is one of the oldest and most established headless CMS platforms. Launched in 2013, it pioneered the API-first CMS model that the broader industry has since adopted. It is a mature, well-documented platform with a large ecosystem of integrations, a capable editorial interface, and a content delivery infrastructure built for scale. For publishing teams evaluating headless CMS options, Contentful warrants serious consideration — with a clear-eyed understanding of where it excels and where its costs and complexity create friction.