Acquia

https://www.acquia.com

Experience Platform that's made for Drupal

• Drupal sites hosting • Developers can experience free tier • Free development tools, for example, Acquia Dev Desktop also available

Contentful

https://www.contentful.com/pricing/

A content platform is everything a CMS isn’t.

• Delivery APIs and content management in the cloud • Headless CMS • One free micro space including 5000 records, 10 users, 2 locales and 24 content types

Kontent

https://kontent.ai/pricing

Manage content without limits, wherever your team is.

• Content as a service solution • Enjoy all headless CMs benefits with this • Empowers marketers simultaneously • Unlimited project • Start plan available with 3 users, 2 languages, 5k content items • Large plans are available to meet your project requirements

Prismic

https://prismic.io/pricing

Prismic is a Content Management System, a tool for editing online content

• Content management interface along with scalable and fully hosted API • Headless CMS • Community plan offers unlimited API calls, locales, assets, documents, custom types, etc. with 1 user. • It offers everything needed at the same place required for your next project. • Bigger plans available for open projects or open source content.

Sanity

https://www.sanity.io/pricing

Build with Structured Content

• For structured content a hosted backend • Customizable MIT licensed editor developed with React • 2 users, 500k API CDN requests, 2 databases, 500 assets per project for free. • Unlimited projects