We are the KeystoneJS to Builder.io migration experts

The biggest challenge with KeystoneJS is that it hands you all the responsibility that a managed CMS would normally handle. Deployment is entirely on you, and the documentation around production hosting, Docker configuration, and scaling is thin. We've seen teams struggle to go from a smooth local development experience to a reliable production setup, especially if they don't have dedicated DevOps support. The admin UI Docker image alone can balloon to over a gigabyte, which is a headache for containerised deployments.

The community around Keystone is significantly smaller than competitors like Strapi or Payload. That means fewer tutorials, fewer plugins, and slower answers when you hit an edge case. The ecosystem of ready-made integrations is almost non-existent, so you'll be building most things from scratch. For an agency working on client projects with deadlines, that time cost adds up quickly.

Content editors also tend to have a harder time with Keystone compared to more polished alternatives. The admin UI is functional but feels utilitarian, and non-technical users often need more onboarding than you'd expect. There's no visual editing, no preview infrastructure, and no real content workflow features like drafts, publishing schedules, or approval chains without building them yourself. If your client's content team needs a CMS they can pick up and run with, Keystone usually isn't the answer.

Builder.io occupies a unique spot in the headless CMS landscape. It is not really a traditional headless CMS in the way that Sanity or Contentful are. It is more of a visual page builder with headless capabilities bolted on. That distinction matters because if your marketing team needs to ship landing pages fast without filing Jira tickets, Builder.io genuinely delivers on that promise. The drag-and-drop editor is solid, and the ability to register your own React components so that non-developers can compose pages from your actual design system is a legitimately powerful idea.

Where Builder.io really shines is in bridging the gap between developers and marketing teams. You build the components, register them with Builder, and then hand the keys over. Marketers can assemble pages, run A/B tests, and publish without touching code. For agencies like ours, this means fewer "can you just move this banner" tickets and more time spent on actual engineering work.

The framework support is also genuinely broad. Next.js, React, Angular, Vue, Svelte, Qwik, SolidJS, and React Native all have SDKs. If you are running a modern JavaScript stack, Builder.io probably has an integration for it. The AI features they have been shipping are interesting too, though still early days in terms of real production reliability.