The best alternatives to Headlesshost are Payload, Flamelink, and Craft CMS. If these 3 options don't work for you, we've listed a few more alternatives below.
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AssemblyAI— Multilingual Speech-to-Text API with superhuman accuracy
Payload is a TypeScript headless CMS built to catapult your efficiency as a developer. From your config, Payload generates extensible REST, GraphQL, and Node APIs as well as a powerful React admin panel that your content editors will love.
Flamelink.io is an easy to use, content centric CMS that integrates with Google's Firebase to build Mobile and Web Apps, Digital Campaigns, and Websites.
No Code Flow is a component collection for the Webflow CMS that will help you to build better websites without the need to use third party stuff. Easy and fast to implement, prestyled templates, works with native Webflow CMS.