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UK Services
Zero-Downtime Cutover301 Redirect MappingGDPR Compliant

Agence de Migration de Sites Web UK

Votre CMS Perd du Trafic Pendant que Vous Dormez — Voici Pourquoi

99.9%
SEO Retention
Rankings preserved
0s
Downtime
Atomic deploy swaps
95+
Lighthouse Score
Post-migration target
60-day
Monitoring
Post-launch included
What Breaks When You Migrate — And What Actually Gets Fixed

Your site ships 2.8MB of JavaScript before a buyer sees your headline. A headless CMS migration rips out the monolith — WordPress, Drupal, TYPO3, Sitecore — and splits your content layer from the frontend. Your backend becomes an API-driven Supabase or Sanity instance. Your frontend runs Next.js with React Server Components. Pages load in under 800ms. Your hosting bill drops 40–60% the moment you switch to serverless. And when Google's crawler hits your site? It sees clean HTML, structured data, and zero render-blocking scripts. That's the difference between a 92 Core Web Vitals score and a 48. Your rankings stop haemorrhaging the day the migration goes live.

Où les projets échouent

Legacy CMS platforms routinely score below 50 on Core Web Vitals Google demotes slow sites. Every 100ms of delay costs you 1% in conversions.
WordPress and Drupal push security patches monthly — and they break things Unpatched CMS platforms are the #1 attack vector for UK businesses right now.
Hosting costs keep climbing whenever traffic spikes Monolithic CMS servers can't scale elastically, so you're paying for peak capacity 24 hours a day whether you need it or not.
Content editors end up working around the backend rather than with it That leads to inconsistent content and SEO drift creeping across your pages.
If a previous migration attempt tanked your rankings for months, you already know how badly botched 301 redirects and missing schema markup can hurt organic traffic — sometimes permanently. Botched 301 redirects and missing schema markup can tank organic traffic permanently.
GDPR compliance gets bolted onto a stack that was never designed for it ICO fines go up to £17.5M or 4% of global turnover. A cookie consent plugin won't save you.

Conformité

301 Redirect Mapping

We crawl every URL on your legacy CMS and build a complete redirect map before we touch anything. Canonical tags, hreflang attributes, and structured data all transfer intact.

GDPR Data Audit

We run a full audit of personal data sitting in your current CMS. Supabase Row-Level Security and UK/EU-hosted PostgreSQL handle data isolation and encryption at rest.

Zero-Downtime Deploy

Blue-green deployments via Vercel with atomic swaps keep your old site live until the new stack clears automated health checks. Nothing goes live until it's ready.

Content Schema Transform

WordPress ACF fields, Drupal Paragraphs, TYPO3 Flux elements, Sitecore Helix modules — they all map to clean headless schemas. Nothing gets left behind.

SEO Monitoring Dashboard

We watch your rankings through Google Search Console for 60 days after launch. Automated alerts flag ranking drops, crawl errors, and broken redirects the moment they show up.

Auth & Consent Migration

User accounts move to Supabase Auth with OAuth, Magic Links, and JWT. Consent tracking gets rebuilt with proper GDPR-compliant flows and full audit logs.

Ce que nous construisons

Score below 50 on Core Web Vitals because your CMS ships 3MB of unused JavaScript

Pull 10,000+ WordPress posts, ACF fields, and media into Supabase via WPGraphQL in under 48 hours

Break production every time WordPress or Drupal pushes a security patch

Extract Drupal entities, paragraphs, and JSON:API data into Sanity with full content modelling intact

Pay for peak server capacity 24/7 even when your traffic flatlines at night

Migrate TYPO3 Flux elements and TemplaVoilà templates using custom scripts that preserve your content structure

Watch content editors build workarounds because the backend fights them

Decompose Sitecore Helix modules and export 50,000+ assets without breaking enterprise workflows

Lose 30–60% of organic traffic when botched 301 redirects kill your ranking history

Configure PostgreSQL, Edge Functions, Realtime subscriptions, and Row-Level Security for your data layer

Face ICO fines up to £17.5M because GDPR compliance got bolted onto a non-compliant stack

Deploy Next.js App Router with ISR, React Server Components, and dynamic 301 middleware that locks in your SEO equity

Notre processus

01

Migration Audit

First, we crawl your legacy CMS — every URL, custom field, plugin, and data relationship. You get a migration feasibility report with a risk assessment and redirect map before anything moves.
Week 1-2
02

Architecture & Schema Design

Then we design the architecture. We pick your headless CMS (Sanity, Payload, or Supabase-native), design the content schema, and plan the frontend component structure. Everything gets signed off before a single line of code is written.
Week 2-3
03

Content Extraction & Transform

Data migration comes next. Automated scripts pull content via API or direct database export, clean and transform it, then load it into the new headless backend with validation at every step.
Week 3-5
04

Next.js Build & Integration

The build phase delivers a Next.js 15 frontend with App Router, wired to Supabase Auth, Edge Functions, and your headless CMS — with full 301 redirect middleware already in place.
Week 4-7
05

Zero-Downtime Cutover & Monitoring

Launch runs on Vercel via blue-green deployment. The old site stays live until every health check passes. Then 60 days of post-launch SEO monitoring with weekly reports.
Week 8+
Next.js 15SupabaseVercelSanityPayload CMSPostgreSQLDockerGitHub Actions

Questions fréquentes

Combien de temps prend une migration CMS vers Next.js ?

La plupart des migrations prennent 6-10 semaines, selon le nombre de pages et la complexité du CMS. Les sites WordPress simples de moins de 2 000 pages se terminent en environ 6 semaines. Les migrations Sitecore ou Drupal d'entreprise avec modules personnalisés et 50 000+ pages prennent 12-16 semaines. Chaque projet commence par un audit scoped — pas de surprises.

Vais-je perdre mes classements Google pendant la migration ?

Non. Nous construisons une carte de redirection 301 complète avant le basculement, préservant chaque URL, balise canonique, attribut hreflang et balisage de données structurées. Après le lancement, nous surveillons Google Search Console pendant 60 jours et résolvons les problèmes d'exploration dans les 24 heures. Nos clients conservent 99,9% de leur trafic organique.

Supabase est-il conforme au RGPD pour les entreprises britanniques ?

Oui. Supabase exécute PostgreSQL hébergé dans l'UE avec chiffrement au repos et en transit. Nous configurons la sécurité au niveau des lignes pour l'isolation des données, reconstruisons le suivi du consentement via Supabase Auth et nous assurons que tout traitement de données personnelles respecte le RGPD britannique et les exigences de l'ICO. Vos données ne quittent jamais les centres de données de l'UE.

Qu'est-ce qu'une migration sans interruption de service ?

Votre site existant reste en ligne tout au long de la construction complète. Le jour du basculement, nous déployons sur Vercel en utilisant un déploiement bleu-vert — le changement DNS est atomique et instantané. Des vérifications de santé automatisées vérifient chaque page avant que le trafic ne bascule vers la nouvelle stack. Les utilisateurs ne rencontrent jamais une page d'erreur.

Pouvez-vous migrer des plugins WordPress personnalisés et des champs ACF ?

Oui. Nous extrayons Advanced Custom Fields, les types de posts personnalisés, les produits WooCommerce, les soumissions de Gravity Forms et les données spécifiques aux plugins via WPGraphQL ou l'API REST. Les fonctionnalités personnalisées sont reconstruites sous forme de composants Next.js utilisant Supabase Edge Functions ou les fonctionnalités natives du CMS headless — aucune dépendance de plugin transportée.

Combien coûte une migration de site web au Royaume-Uni ?

Les migrations WordPress simples commencent à £10 000 pour les sites de moins de 2 000 pages. Les projets Drupal ou TYPO3 de marché intermédiaire avec modèles de contenu personnalisés s'élèvent généralement à £20 000-£40 000. Les migrations Sitecore d'entreprise impliquant multi-sites, multi-langues et relations de données complexes commencent à £60 000. Tous les devis sont à prix fixe — aucun coût caché.

CMS Migration from £10,000
Fixed-fee. 60-day post-launch SEO monitoring included.
See all packages →
Next.js DevelopmentCore Web Vitals OptimizationWordPress to Next.js Migration

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