Slingshot Bio
Roboto converged Slingshot Bio's WordPress and Shopify sites into one headless Shopify build on Next.js and Sanity, instrumented end to end and AI-ready.
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From Builder.io to Contentful
We are the Builder.io to Contentful migration experts
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The process
How we migrate from Builder.io to Contentful
- 01
Access and gating audit
First we check the existing Builder.io and see whether the data is clean enough to move straight over to Contentful, and plan around any auth walls or bot protection in the way.
- 02
Rendering assessment and extraction
Then we work out how Builder.io renders its pages and pull the content out, even without CMS access.
- 03
AI-assisted sanitization
Everything extracted runs through our sanitization pipeline, which flags slop, normalizes structure, and leaves us clean content to work with.
- 04
Content-model design with the client
Before anything moves, we agree the Contentful content model with you, shaped around how your editors actually work.
- 05
Transform and soft-migrate
We transform the content to the agreed schema and run a full dry run, so mappings and edge cases prove out before production.
- 06
Execute the real migration
Once the dry run is clean, everything moves into Contentful in one controlled cutover.
- 07
Redirect mapping and throttled sitemap submission
Every old URL gets mapped to its new home with the right redirect, so rankings and link equity survive the move.
- 08
Agentic-browser QA
Finally, automated browsers sweep the new site for data issues, design regressions, and missing SEO signals.
- Ready when you are. We'll bring the moving boxes.Start my migration
Challenges with Builder.io
Key pain points
Builder.io looks impressive in demos but the reality of day-to-day usage tells a different story. The editor can be laggy, especially with more than 30 components on a page, and we have seen reports of outright crashes that lose unsaved work. The documentation is a persistent sore point. Developers on forums describe spending days trying to get basic integrations working because the docs are outdated or incomplete. For an agency setting up projects for clients, unreliable documentation means unpredictable timelines.
Pricing is another area where Builder.io catches teams off guard. The free tier exists but is quite limited, and costs ramp up quickly once you need features like roles, scheduling, or higher usage limits. We have seen complaints from freelancers and small teams about unexpected charges and slow support response times when trying to resolve billing issues. The lack of self-hosting is also a hard blocker for some clients with strict data residency requirements.
The biggest concern from our perspective is vendor lock-in. Builder.io's SDKs are deeply embedded in your frontend code, and if you ever need to migrate away, you are essentially rebuilding your page composition layer from scratch. There is also no real-time collaboration, so two editors working on the same page can overwrite each other's changes without warning.
Editor performance and stability
The visual editor becomes laggy with complex pages and has been reported to crash, losing unsaved work. Teams with content-heavy pages will feel this friction daily.
Outdated and incomplete documentation
Developers consistently report that the docs are confusing, outdated, or missing critical steps. Getting started takes far longer than it should for a tool that sells itself on speed.
Vendor lock-in risk
Builder.io's SDKs are tightly coupled to your frontend. Migrating away means rebuilding your entire page building and composition layer from scratch.
Limited collaboration tools
Builder.io now offers branching and peer review workflows in its Fusion product, but true real-time co-editing is still missing. Editors working outside of the Projects workflow can still overwrite each other's changes.
Pricing escalation
Costs ramp up quickly beyond the free tier, and teams report unexpected charges. Basic features like roles and scheduling sit behind higher-priced plans.
Slow and unresponsive support
Multiple users report delayed support responses, unresolved tickets, and difficulty getting refunds or cancellations processed in a reasonable timeframe.
Benefits of Contentful
Key advantages
Contentful is one of the most established headless CMS choices, and we still see plenty of customers land on it after a shortlist.
It's built around structured content, so you model fields once and pull them into any front end you like. That means no copy-pasted components scattered across pages. It also has first-party support for A/B testing and personalization through its Studio add-on, which most competitors don't match natively. The app ecosystem covers SEO, translation, validation, and asset management, and editors get live side-by-side preview for content they're working on.
If your team has the budget and the developer resources to model content properly, it's a solid pick.
API-first design
Contentful was built for APIs from day one, which means your content plugs cleanly into apps, websites, and mobile.
Developer-friendly flexibility
Schemas, content models, and references can be tuned however you like. If your stack is anything beyond "cookie-cutter," Contentful won’t get in your way.
User-friendly interface
Editors enjoy using it. Clean UI, quick search, structured fields, and no "where does this go again?" confusion.
Extensive integration capabilities
Plug in analytics, eCommerce, automation, and translation. Contentful plays nicely with almost anything. And if something isn’t supported yet, you can wire it up yourself without hacking the platform apart.
Scales under traffic
Contentful's global CDN holds up under heavy load. We've run it on sites pushing millions of monthly requests without needing bespoke infrastructure to handle spikes.
Cloud-based architecture
You don't have to install, patch, or maintain anything. It’s fast, globally distributed, and always up to date. Your content team can ship from anywhere without a DevOps babysitter.
Common questions
Builder.io to Contentful migration FAQs
Answers to the most common questions about Builder.io to Contentful migration
Builder.io now prices per seat across its Fusion and Publish products. The free tier covers up to 5 users with limited monthly usage, which is enough to evaluate but not to run a real project. The Pro plan is $24 per user/month with pay-as-you-go usage on top, and the Team plan is $40 per user/month with proper roles, peer reviews, and higher limits. Enterprise is custom pricing with no published figures, and that's where SSO, role-based access control, and SLAs live. Historically, freelancers and small agencies on Builder's old Growth plan reported unexpected charges after exceeding usage limits, and higher tiers charged per "impression", so costs scaled with traffic in ways that weren't always predictable. Get current usage and overage terms in writing before committing.
The migration is step one. Our Contentful team handles what comes after: builds, integrations and the content model work that keeps the new platform clean.
Contentful development agencyGet in touch
Tell us what you're building. We reply within one working day. Jono or someone on the team picks up every message personally.
