The verdict in three sentences
In Dakar, where a large share of B2B traffic runs on unstable 3G/4G networks, a fast site costs in 2026 between FCFA 2,200,000 and 5,000,000, with a dedicated performance budget of FCFA 600,000 to 1,200,000 (WebP/AVIF, PWA, Africa CDN). The target is LCP < 3s on 3G, the condition for not losing prospects before the page even renders. Measured effect: a bounce rate down 25 to 40% and more contact requests.
Budget for a slow-connection-optimized B2B site
Slow-connection performance is not a cosmetic option: it is an architecture choice (offline-first, nearby hosting, light images) decided from the quote stage.
| Item | Scope | 2026 range (FCFA) | EUR equivalent |
|---|---|---|---|
| 3G-optimized B2B site | Design, content, dev | 2,200,000 - 5,000,000 | 3,350 - 7,620 |
| Performance budget | WebP/AVIF, lazy load, PWA | 600,000 - 1,200,000 | 915 - 1,830 |
| Africa CDN + cache | Regional points of presence | 250,000 - 600,000 | 380 - 915 |
| Offline mode (PWA) | App cache, offline forms | 400,000 - 900,000 | 610 - 1,370 |
| Perf maintenance | Monitoring + optimizations | 50,000 - 150,000 / mo | 76 - 229 / mo |
What makes the difference on 3G
A fast site in Dakar relies on precise technical choices, verifiable via Core Web Vitals measured under real conditions (3G throttling).
| Lever | Without optimization | With optimization |
|---|---|---|
| Average page weight | 3 - 6 MB | 0.4 - 1 MB |
| LCP on 3G | 6 - 10 s | < 3 s |
| Images | Heavy JPEG/PNG | WebP/AVIF, srcset |
| Offline browsing | Impossible | PWA, app cache |
| Hosting | Distant server | Africa CDN |
| Bounce rate | High | -25 to -40% |
Mini case study
Mr Ndiaye, head of a B2B industrial equipment SME in Dakar, loses prospects because his site takes 8s to render on 3G. He invests FCFA 3,500,000 in an optimized site plus FCFA 900,000 of performance budget, i.e. FCFA 4,400,000 (about EUR 6,700) over 7 weeks. Average page weight drops from 4.2 MB to 0.7 MB and 3G LCP falls to 2.6s. Mobile bounce rate drops 34%, lifting quote requests from 22 to 31 per month. At an average deal of FCFA 1,800,000 and a 15% close rate, that is roughly FCFA 2,400,000 in additional monthly revenue.
FAQ
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
Why optimize specifically for 3G in Senegal?
A significant share of mobile B2B traffic runs on congested or unstable 3G/4G networks. A heavy site loses prospects before rendering: every extra second raises bounce, especially outside major cities.
What does a PWA bring to a B2B site?
A PWA caches the interface and lets users browse the catalog or fill a form even offline, with data synced when the network returns. It is a genuine offline-first asset for field sales teams.
Is an Africa CDN essential?
It sharply reduces latency by bringing files closer to users. Without a regional point of presence, even a light site stays penalized by the distance to the server.
How much does performance maintenance cost?
Allow FCFA 50,000 to 150,000 per month for monitoring, Core Web Vitals re-tests and continuous optimization, to prevent degradation over successive updates.
How long for a 3G-optimized site?
Between 5 and 8 weeks depending on scope: design, development, performance-budget integration and testing under real conditions with network throttling.
Let's scope your project. Tell us the page count, your offline needs and your prospecting areas: we scope a 3G-fast site (FCFA 2,200,000-5,000,000). 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.
