The verdict in three sentences
For a business application of 250 developer days, the gap between a London agency and an Eastern European nearshore team runs from roughly 237,500 GBP to 87,500 GBP as a 2026 order of magnitude. French-speaking teams in Dakar and Casablanca sit in the same time zone as London or one hour away, at day rates often below Poland or Romania, which matters when the product also serves French-speaking markets in Europe or Africa. The real risk is not distance but team turnover and loose governance: it is managed with 2-week sprints, systematic demos and stability clauses in the contract.
The options priced over 250 days
The COO of a London B2B services firm (120 staff, clients in the UK, France and West Africa) wants to replace spreadsheets and an ageing tool with an app covering contracts, field scheduling and invoicing, with French and English interfaces. The CTO estimates 250 person-days including discovery and testing.
| Option | Day rate, 2026 order of magnitude | Budget for 250 days | Time difference with London |
|---|---|---|---|
| London agency | 650 to 950 GBP | 162,500 to 237,500 GBP | 0 h |
| Poland or Romania nearshore | 350 to 550 GBP | 87,500 to 137,500 GBP | 1 h |
| French-speaking team, Casablanca | 260 to 390 GBP | 65,000 to 97,500 GBP | 0 to 1 h |
| French-speaking team, Dakar | 220 to 350 GBP | 55,000 to 87,500 GBP | 0 to 1 h |
| South Asia offshore | 130 to 260 GBP | 32,500 to 65,000 GBP | 4 h 30 to 5 h 30 |
Day rates are not the whole story. A cheaper team producing 20 % rework costs as much as a pricier, reliable one. Compare deliverables (accepted features), not billed days. Some nearshore agencies, including Kolonell in Dakar, work on fixed-price functional lots: for a project this size, above the top of its complex custom app grid (7,000,000 to 15,000,000+ FCFA, or 10,670 to 22,870+ EUR), the amount is set in a quote after a discovery workshop.
Quality, language and legal framework: what really changes
| Criterion | Eastern Europe nearshore | French-speaking agency (Dakar or Casablanca) |
|---|---|---|
| Working language | Good English, rarely French | French native, working English |
| Contract | English law possible | English or French law possible |
| Live meetings | Video, 2 to 3 h flight | Video, 3 to 6 h flight |
| Team turnover | High in Warsaw and Bucharest hubs | Moderate in Dakar, higher in Casablanca |
| UK GDPR | EU adequacy, simpler | Standard contractual clauses (IDTA) needed |
| Data hosting | Client's choice | UK or EU hosting recommended |
For a firm with French-speaking clients, a team that writes French interfaces and support content natively avoids translation rework. Eastern Europe benefits from EU adequacy under UK GDPR; with Senegal or Morocco, keep data hosted in the UK or EU and sign an International Data Transfer Agreement. Senegal also has its own data protection law (law 2008-12), which helps align practices.
Turnover is the risk to watch in Warsaw, Bucharest and Casablanca, where large service centres hire aggressively. Dakar's market is less overheated, but you should still require a stable core team.
The governance that makes nearshore reliable
Success comes from rhythm:
- 2-week sprints with a live demo of what actually works, not abstract status reports.
- A product owner on your side, available 4 to 6 hours a week, who settles priorities.
- A project manager on the provider side, single point of contact.
- Repository and staging access from week 1.
- Stability clause: replacing a key member includes 2 weeks of handover at the provider's cost.
- Acceptance per lot with written criteria agreed before development.
A kickoff visit and a mid-project visit cost 800 to 2,000 GBP per trip, marginal against the savings.
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Sarah, COO of a London facilities services firm, compares quotes for her 250-day app. A London agency offers an 800 GBP average day rate, so 200,000 GBP. A Kraków team quotes 450 GBP, so 112,500 GBP. A Dakar team quotes the equivalent of 290 GBP, so 72,500 GBP.
She adds 10 % extra internal oversight to each nearshore option, valued at 12,000 GBP, plus two trips: 2,000 GBP to Kraków, 3,000 GBP to Dakar. Full cost: Kraków 126,500 GBP, Dakar 87,500 GBP. Savings against London: 73,500 GBP and 112,500 GBP. Because half her end users work in French, she weighs the native French team as a quality factor, not just a price factor, and puts part of the savings into a 3-year maintenance contract and an independent security audit.
FAQ
Is a Dakar team suitable for a business-critical app?
Yes, with strict governance: 2-week sprints, acceptance per lot and permanent code access. Senior engineers there compare well, at 220 to 350 GBP a day as a 2026 order of magnitude.
Eastern Europe or French-speaking Africa?
Eastern Europe offers a deep talent pool and EU adequacy; Dakar and Casablanca offer lower rates, London-aligned hours and native French. The deciding factor is the stability and track record of the proposed team.
How do I protect code ownership?
The contract assigns IP to your firm as payments are made, and the repository is opened in your name on day one.
Is UK GDPR compatible with a team outside Europe?
Yes, with UK or EU hosting, an IDTA and access limited to anonymized test data. Budget 2 to 3 days of legal work.
Can I mix a London agency and a nearshore team?
It is common: discovery and architecture in London over 20 to 30 days, build nearshore. The budget lands between the two options.
Let's scope your project. We split your app into functional lots with a 2-week sprint plan and a dedicated French and English speaking team. 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.
