The verdict in three sentences
WordPress stays unbeatable on upfront cost (8,000-18,000 EUR) and ecosystem, but accumulates a costly plugin debt in security and maintenance. Headless (Next.js + Sanity/Strapi, 18,000-45,000 EUR) costs more to start, but delivers a lower 3-year TCO, stronger security and green Core Web Vitals. For an exposed, long-lived corporate site, headless wins as soon as brand and performance matter.
Upfront cost: WordPress wins
On the starting budget, WordPress keeps an edge, especially for a standard brochure site. Headless needs more initial engineering (decoupled front end, CMS integration, deployment).
| Criterion | WordPress | Headless (Next.js + Sanity) |
|---|---|---|
| Upfront cost (EUR) | 8,000 - 18,000 | 18,000 - 45,000 |
| Delivery time | 6 - 10 weeks | 8 - 14 weeks (+30 %) |
| CMS licence | Free (paid plugins) | 0 - 300 EUR/month (SaaS) |
| Hosting | 20 - 150 EUR/month | 20 - 200 EUR/month |
| Ecosystem / plugins | Very large | Bespoke, fewer plugins |
The trap: WordPress plugins look free, but each adds an attack surface, a conflict risk and an update burden. The technical debt is paid later.
3-year TCO: headless wins
Once you factor in maintenance, security and incidents, the gap reverses. An exposed corporate site faces intrusion attempts and needs frequent updates.
| 3-year line item | WordPress | Headless |
|---|---|---|
| Initial build | 13,000 EUR | 30,000 EUR |
| Maintenance + plugins (36 months) | 18,000 EUR | 10,000 EUR |
| Security fixes / incidents | 6,000 - 12,000 EUR | 1,500 - 3,000 EUR |
| Perf loss (SEO, conversions) | High | Low |
| 3-year TCO (order of magnitude) | 37,000 - 43,000 EUR | 41,500 - 43,000 EUR |
By year 4, headless pulls clearly ahead: its maintenance stays flat while WordPress plugin debt swells. On performance, headless delivers LCP under 1.5 s where a heavy WordPress build struggles to get below 2.5 s.
Decision criteria
Choose WordPress if: tight budget, editorial team used to it, low-exposure brochure site. Choose headless if: strong brand, Core Web Vitals requirements, critical security, multi-site or multilingual, a lifecycle of 4 years or more.
Mini case study
Thomas, CIO of an industrial mid-cap in Berlin, is torn. WordPress quote: 14,000 EUR + 6,000 EUR/year maintenance and plugins. Headless quote: 30,000 EUR + 3,000 EUR/year.
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Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
Over 4 years: WordPress = 14,000 + (6,000 x 4) = 38,000 EUR; headless = 30,000 + (3,000 x 4) = 42,000 EUR. A gap of only 4,000 EUR, but two avoided WordPress security incidents (estimated at 8,000 EUR) tip the maths toward headless, before counting the SEO gain from Core Web Vitals.
FAQ
Is headless always more expensive?
Upfront, yes: budget 18,000-45,000 EUR versus 8,000-18,000 EUR for WordPress. But over 3-4 years the TCO converges then reverses thanks to far lower maintenance and security costs.
Is WordPress less secure?
Not inherently, but its plugin attack surface is larger. Security fixes cost 6,000-12,000 EUR over 3 years on average versus 1,500-3,000 EUR for headless.
How much does the Sanity SaaS CMS cost?
From 0 to 300 EUR/month depending on users and API volume. The free tier covers many mid-sized corporate sites.
What is the impact on SEO and Core Web Vitals?
Headless typically delivers LCP under 1.5 s and green Core Web Vitals, improving ranking. A heavy WordPress build often exceeds 2.5 s without heavy optimisation.
How much longer does headless take?
About +30 %, i.e. 8-14 weeks versus 6-10 weeks, due to the decoupled front end and CMS integration.
Let's scope your project. Give us your page volume, security requirements and horizon (3 years or more), and we'll compare WordPress and headless for your exact case with a costed TCO. 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.
