Ninetailed

Specialized personalization platform for composable/headless architectures

Ninetailed is a composable content personalization and experimentation platform designed specifically for modern headless CMS architectures. The company provides marketers with tools to create, test, and optimize personalized content experiences across digital channels without requiring extensive developer resources. Built as an API-first solution, Ninetailed integrates natively with popular headless CMS platforms like Contentful, Sanity, and Contentstack, enabling organizations to add personalization and A/B testing capabilities to their existing content infrastructure. The platform addresses a critical gap in the composable architecture ecosystem, where traditional personalization tools were not designed for headless environments. Ninetailed's approach allows marketing teams to segment audiences, create content variations, run experiments, and deliver personalized experiences directly within their content management workflows. In 2024, Ninetailed was acquired by Contentful, one of its primary integration partners, to enhance Contentful's native personalization capabilities and strengthen its position in the composable content platform market. Following the acquisition, Ninetailed continues to operate as a personalization solution within Contentful's ecosystem, serving organizations that have adopted headless CMS architectures and composable technology stacks. The platform remains particularly relevant for mid-market to enterprise companies undergoing digital transformation and seeking to implement personalization without the complexity of traditional marketing clouds.