The verdict in three sentences
Leaving WordPress for a headless CMS (Next.js + Sanity) only makes sense if you want speed, security and modern editing — not to follow a trend. Budget 10,000 to 25,000 EUR depending on page volume and complexity, 8 to 12 weeks and a content freeze during cutover. The critical point is not the tech but the 301 redirect plan that preserves 100 % of the ranking you earned.
What you gain (and what it costs) in 2026
Headless separates the editorial back office from the public front: content is served statically or via API, radically changing performance and attack surface.
| Criterion | Classic WordPress | Headless (Next.js + Sanity) |
|---|---|---|
| Average TTFB | 400-800 ms | 80-200 ms |
| Attack surface | plugins, exposed admin | reduced (static front) |
| Hosting cost/yr | 600-1,500 EUR | 350-900 EUR |
| Security updates | weekly | rare |
| Front-end flexibility | theme-constrained | 100 % custom |
| Upfront cost | low | 10,000-25,000 EUR |
Headless costs more to build but less to run and is far faster. It pays off above a certain traffic level or with strong security requirements.
The detailed migration quote
Here is the 2026 breakdown of a migration for a content site of 80 to 200 pages with a blog.
| Workstream | Detail | Cost EUR |
|---|---|---|
| Sanity modeling | schemas, editorial roles | 2,000-4,500 |
| Next.js front-end build | pages, blog, components | 4,000-9,000 |
| Content migration | scripts + manual cleanup | 1,500-4,000 |
| 301 redirect plan | old/new URL mapping | 1,000-2,500 |
| SEO + performance QA | crawl, hreflang, CWV | 1,000-2,500 |
| Editor training | Sanity onboarding | 500-2,000 |
| Total | 80-200 pages | 10,000-24,500 |
The 301 redirect line is non-negotiable: a migration without complete URL mapping can drop traffic by 20 to 60 % within weeks.
Mini case study
Sophie, digital lead at a B2B publisher in Singapore (150 pages, 40,000 visits/month), migrates from WordPress to Sanity + Next.js for 18,000 EUR. TTFB drops from 620 ms to 140 ms, hosting from 1,200 to 700 EUR/yr (-42 %), and above all article publishing time falls from 25 to 8 minutes. On a team publishing 20 articles/month, the editorial time saved is worth 20 x 17 min = 5.6 h/month. Thanks to the rigorous redirect plan, organic traffic is flat at day 30 then grows 12 % at three months from the speed gains.
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FAQ
Will we lose SEO during migration?
Not if the 301 redirect plan is complete and tested before go-live. We map each old URL to its new one, keep title/meta tags and internal linking; traffic should stay flat from week one.
Why Sanity over another headless CMS?
Sanity offers a customizable editorial studio, a real-time API and approval roles suited to B2B. Strapi, Contentful or Directus are valid alternatives depending on budget and hosting preference.
Will our editors cope?
Yes, after a 2-3 hour training. The interface is more structured than WordPress, but we model fields to match their habits, with live preview.
Why a content freeze?
Because migrating a constantly changing database creates gaps. We freeze publishing for 3-5 days during final cutover, then reopen editing on the new CMS.
Is headless right for a small site?
Below 30 pages without heavy traffic or security needs, an optimized WordPress is often more economical. Headless shines on volume, speed and international reach.
Let's scope your project. Tell us your page count, current CMS and security requirements: we quote the headless migration and the redirect plan. Detailed quote within 48 h. WhatsApp +221 77 596 93 33.
Mohamed Bah
Fondateur, Kolonell
Passionate about digital and entrepreneurship in Africa, Mohamed has been helping Sénégalese businesses with their digital transformation since 2020. Founder of Kolonell, he believes every SME deserves a professional and accessible online présence.
