The verdict in three sentences
An AI support chatbot answering from your knowledge base (RAG) costs 9,000 to 17,000 EUR to set up in 2026, website/CRM integration included. Recurring LLM API costs run from 50 to 400 EUR/month depending on conversation volume. Well designed, it deflects 30 to 50 % of tier-1 tickets while providing 24/7 availability.
The cost of an AI support chatbot
The budget splits across knowledge-base ingestion, technical integration and recurring costs. Answer quality depends directly on the quality of your documentation.
| Item | 2026 range (EUR) | Detail |
|---|---|---|
| Setup + base ingestion (RAG) | 6,000 - 14,000 | Cleanup, indexing, prompts |
| Website / CRM integration | 2,000 - 3,500 | Widget, history, tickets |
| Guardrails and testing | 1,500 - 3,000 | Scenarios, human escalation |
| LLM costs / month | 50 - 400 | By conversation volume |
| Vector database / month | 20 - 100 | By document volume |
| Maintenance / year | 2,000 - 4,000 | Base updates, tuning |
SaaS widget vs custom solution
A SaaS widget starts fast and bills as a subscription; custom costs more to build but keeps cost and data under control at high volume.
| Criterion | SaaS widget | Custom |
|---|---|---|
| Upfront cost | 1,500 - 4,000 EUR | 9,000 - 17,000 EUR |
| Subscription / month | 80 - 600 EUR | 70 - 500 EUR (LLM + infra) |
| Data control | Medium | High |
| Customisation | Limited | Full |
| Deep CRM integration | Variable | Complete |
| Best for | Fast start | Volume and data needs |
Mini case study
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Sophie, customer service lead at a 25-person e-commerce firm in Lille, receives 1,800 tickets/month, 60 % of them tier-1. Custom project: 12,500 EUR, plus 220 EUR/month LLM and infra. The chatbot deflects 40 % of tickets (720/month), freeing the equivalent of 0.7 FTE (loaded cost 2,600 EUR/month), i.e. 1,820 EUR/month saved. ROI in about 7 months, plus instant 24/7 answers and a better satisfaction score.
FAQ
How many tickets can a chatbot really deflect? On a clean knowledge base, 30 to 50 % of tier-1 requests (hours, tracking, procedures). Complex cases still escalate to a human.
What happens if the bot cannot answer? It escalates to an agent with the conversation context. That escalation rule is part of the guardrails (1,500 - 3,000 EUR).
How much is the LLM per month? From 50 EUR for a few hundred conversations to 400 EUR for several thousand. Cost is proportional to volume and chosen model.
Do we need perfect documentation upfront? No, but it must be usable. Part of the setup (6,000 - 14,000 EUR) is precisely to clean and structure the base.
Can the chatbot connect to our CRM? Yes, to read orders or create tickets. Deep integration is an advantage of custom over the SaaS widget.
Let's scope your project. Give us your monthly ticket volume, your knowledge sources and your budget, and we'll price a pilot with a deflection target. 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.
