The verdict in three sentences
A RAG AI chatbot (Retrieval-Augmented Generation) reads your documentation, tickets and procedures to answer with your real answers, not generalities. The decision is between a SaaS widget (fast, generic) and a custom assistant (integrated, precise) priced at 20,000 to 55,000 EUR. With a 50 to 70 % resolution rate, it unclogs support and lowers cost per ticket.
SaaS vs custom: the right level
A SaaS widget deploys in days and is enough for a FAQ. But once you want to connect the CRM, check an order status live, respect a brand tone and host data in Europe, the custom assistant wins. It costs more upfront but avoids per-volume subscriptions and makes you owner of the logic.
| Criterion | SaaS widget | Custom assistant (RAG) |
|---|---|---|
| Setup cost | 0 - 3,000 EUR | 20,000 - 55,000 EUR |
| Recurring cost | 100 - 500 EUR/month | 150 - 800 EUR/month (LLM run) |
| Delivery time | 1 - 2 weeks | 8 - 14 weeks |
| CRM/back-office integration | Limited | Full |
| Resolution rate | 30 - 50 % | 50 - 70 % |
| Tone and data control | Low | Total |
| Data hosting | Vendor | Your choice (EU) |
Support savings
The real gain is measured by tickets absorbed without an agent. For a team handling 4,000 requests/month at a fully loaded cost of 4.50 EUR per human ticket, here is the impact by automatic resolution rate.
| Auto resolution rate | Tickets absorbed/month | Monthly saving | Annual saving |
|---|---|---|---|
| 30 % | 1,200 | 5,400 EUR | 64,800 EUR |
| 50 % | 2,000 | 9,000 EUR | 108,000 EUR |
| 60 % | 2,400 | 10,800 EUR | 129,600 EUR |
| 70 % | 2,800 | 12,600 EUR | 151,200 EUR |
Mini case study
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Marc, customer relations lead of an e-commerce firm in Berlin (4,000 tickets/month), invests 38,000 EUR in a RAG assistant plus 500 EUR/month LLM run. At a 60 % resolution rate, he saves 10,800 EUR/month, i.e. 10,300 EUR net after run. The project pays back in 38,000 / 10,300 ≈ 3.7 months. Beyond that, the assistant handles seasonal peaks without hiring and improves first-response time, from 6 h to under a minute.
FAQ
What is the difference between a classic chatbot and RAG? A scripted chatbot follows rigid trees; a RAG assistant searches your documents and generates a contextual answer, hence a far higher resolution rate.
How much does a custom AI chatbot cost in 2026? Between 20,000 and 55,000 EUR depending on integrations, plus an LLM run of 150 to 800 EUR/month tied to conversation volume.
Can the chatbot get things wrong? The risk exists, hence the importance of locked sources, guardrails and escalation to a human agent when confidence is low.
How long to set up? Plan 8 to 14 weeks for a custom assistant, including knowledge-base indexing and testing.
Does my data stay confidential? Yes, a custom assistant can host the index and logs in the EU and send the model only what is needed, with no reuse for training.
Let's scope your project. Share your ticket volume, knowledge sources and target integrations, and we will price the assistant with the best ROI. 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.
