Contentful is a headless CMS platform founded in Berlin in 2013, valued at over $3 billion after its 2022 Series F round and serving brands such as Spotify and Audi. It delivers structured content to any channel including Web, App and IoT via REST/GraphQL APIs.
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SilverStripe CMS is a New Zealand-maintained open-source PHP CMS publicly available since 2007. Its 2-layer architecture and $0 core licensing model fit teams that value code control and long-term maintainability.
ProcessWire is an open-source CMS released in 2010 and built on PHP, known for its flexible field model, API-driven development and template freedom, with 20+ built-in field types under the MPL 2.0 license, a common choice for developers building custom websites and business systems.
Payload CMS is an open-source headless CMS and application framework built on Next.js and TypeScript, code-first and self-hostable, used in production by Microsoft, ASICS, and Blue Origin, and part of Figma since 2026.
Ibexa (eZ Publish) originates from Norway, where its predecessor eZ Systems was founded in 1999, and is an enterprise open-source CMS and digital experience platform (DXP) known for enterprise content modeling, multilingual, and workflow capabilities.
ExpressionEngine is a PHP content management system created by EllisLab in 2002, known for flexible content modeling and a fully controllable template engine, maintained for over 20 years and suited to complex content-driven websites.
Cockpit CMS is an open-source headless content management system released in 2015 under the MIT license, delivering JSON content through a REST API. It is lightweight, self-hostable and flexible for developer-driven, tech-stack-agnostic content backends.
Brightspot is an enterprise content management system founded in the United States in 2007, known for flexible content modeling, multi-site management, and built-in DAM, serving large media publishers, education, and government, with headless CMS and AI content enhancement.
Agnostic CMS is an open-source headless content management system created by Tom H. in 2020, built around GraphQL API with custom content modeling and multi-environment deployment, self-hostable at zero license cost.
Umbraco is an open-source .NET CMS founded in Denmark in 2005 with over 700,000 installations, known for its MIT-licensed core, friendly editing experience and Heartcore headless mode for Microsoft-stack enterprise content sites.
Prismic is an API-first headless CMS founded in Paris, France in 2013, known for its Slice content model, Slice Machine local development and Page Builder visual editing, delivering content through REST and GraphQL APIs with over $40 million in cumulative funding.
Craft CMS is an open-source CMS released in 2016 by Pixel & Tonic, known for flexible content modeling, Matrix fields and native GraphQL headless mode, with single-instance multi-site and multilingual support, adopted by brands such as Netflix and Spotify.