The verdict in three sentences
A custom AI chatbot fed by your document base (RAG architecture) costs 3,000,000 to 8,000,000 FCFA in 2026, plus a monthly API cost. It cuts repetitive support questions by 50% and answers 24/7 on your website and WhatsApp, in your language and with your own information. Properly built with guardrails, it avoids hallucinations by answering only from your validated documents.
What a custom RAG chatbot costs in 2026
Price depends on document volume, channels (website, WhatsApp, Messenger) and business integrations. 2026 order of magnitude:
| Scope | Indicative price | Lead time | Included |
|---|---|---|---|
| Website RAG chatbot | 3,000,000 - 4,500,000 FCFA | 3-5 wks | Document base, site widget, guardrails |
| + WhatsApp Business | 4,500,000 - 6,000,000 FCFA | 5-7 wks | WhatsApp channel, conversation history |
| Full business assistant | 6,000,000 - 8,000,000 FCFA | 7-10 wks | CRM integrations, actions, dashboard |
| Monthly API cost | 90,000 - 350,000 FCFA/mo | — | By conversation volume |
| Annual maintenance | 600,000 - 1,200,000 FCFA/yr | — | Base updates, tuning |
API cost depends on volume: expect 90,000 to 350,000 FCFA/month for 3,000 to 12,000 conversations, adjusted for the size of documents queried.
The measurable support impact
| Metric | Before (human only) | After (RAG chatbot) | Delta |
|---|---|---|---|
| Repetitive questions handled | 100% human | 50% chatbot | -50% load |
| Availability | 8 h/day | 24/7 | +200% |
| Average response time | 35 min | Instant | ÷immediate |
| Cost per answer | 450 FCFA | 120 FCFA | -73% |
| Off-topic answer rate | — | < 3% | guardrails active |
Guardrails (answers restricted to validated documents, handover to a human when in doubt) keep the off-topic rate under 3%, a prerequisite for customer trust.
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Mini case study
Aminata, director of a health mutual in Dubai, receives 220 questions/day on coverage and reimbursements, 60% of them repetitive. She invests 5,500,000 FCFA in a site + WhatsApp RAG chatbot, plus 200,000 FCFA/month of API. The chatbot absorbs 50% of the volume: her 3 agents recover ~3 h/day in total, the equivalent of a half-time role, worth ~1,800,000 FCFA/year. 24/7 availability improves member satisfaction. ROI reached in about 9 months, brand gains aside.
FAQ
How do you stop the chatbot inventing answers? RAG architecture limits the model to your validated documents: it cites its sources and, when uncertain, hands over to a human rather than inventing. This guardrail is the core of a serious deployment.
Can it run on WhatsApp? Yes, via WhatsApp Business API, often the most relevant channel in the region. The chatbot answers in the conversation and transfers to a human agent when needed.
Do I pay an API every month? Yes, the language model is usage-billed: 90,000 to 350,000 FCFA/month by conversation volume. This variable cost stays well below the cost of an extra agent.
Which languages does it answer in? French and English natively, and it can be calibrated to understand common local phrasing. Response language matches the user's.
How long to go live? From 3 to 10 weeks depending on channels and integrations. A site RAG chatbot deploys in 3-5 weeks; a CRM-connected business assistant takes 7 to 10 weeks.
Let's scope your project. Tell us your question volume, channels (website, WhatsApp) and document base: we'll price a custom AI chatbot, budget 3,000,000-8,000,000 FCFA, deliverable in a few weeks. 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.
