The verdict in three sentences
An AI assistant connected to your knowledge base costs 10,000 to 35,000 EUR (excl. VAT) in 2026 and ships in 5 to 10 weeks. It becomes profitable once it handles 40 to 65% of tier-1 tickets without human intervention, with clean escalation to your agents for the rest. The often-underestimated line item isn't development but the monthly API cost and knowledge-base maintenance.
What an AI chatbot project actually pays for
The price covers conversational design, ingesting and cleaning your documentation (RAG), integration with your site and support tool (Zendesk, HubSpot, Freshdesk), the human escalation mechanism and GDPR compliance. The broader and more volatile your documentation, the higher the budget.
| Tier | 2026 price (EUR excl. VAT) | Timeline | Scope | API/month |
|---|---|---|---|---|
| AI FAQ chatbot | 10,000 - 15,000 | 5-6 weeks | Site + dynamic FAQ | 200 - 350 |
| Integrated support assistant | 15,000 - 25,000 | 6-8 weeks | + Zendesk/HubSpot, escalation | 350 - 600 |
| Advanced AI assistant | 25,000 - 35,000 | 8-10 weeks | + multilingual, actions, analytics | 600 - 900 |
| Base + model maintenance | 3,000 - 7,000/yr | ongoing | knowledge updates | included |
API cost depends on conversation volume and model: budget roughly 0.10 to 0.35 EUR per resolved conversation in 2026, decreasing with volume.
Impact on ticket volume and ROI
The gain comes from deflection: each avoided tier-1 ticket frees agent time (loaded cost ~32 EUR/h, 12 min per ticket, i.e. ~6.4 EUR per manually handled ticket).
| Monthly tier-1 tickets | Deflection rate | Tickets avoided | Saving/month (EUR) | ROI |
|---|---|---|---|---|
| 800 | 45% | 360 | 2,304 | 8-11 months |
| 1,500 | 55% | 825 | 5,280 | 5-7 months |
| 3,000 | 60% | 1,800 | 11,520 | 3-5 months |
| 5,000 | 65% | 3,250 | 20,800 | 2-4 months |
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Mini case study
Marc, customer service director at a B2B SaaS vendor in Bordeaux, receives 1,500 tier-1 tickets/month. He deploys an integrated support assistant at 21,000 EUR (excl. VAT), plus 500 EUR/month API. At 55% deflection, he avoids 825 tickets, i.e. 5,280 EUR/month in agent savings. Total monthly cost (API + 24-month amortization): 500 + 875 = 1,375 EUR. Net gain: 3,905 EUR/month, project payback in under 7 months, first-response time cut sixfold.
FAQ
Will the chatbot hallucinate wrong answers? The risk is contained by a RAG architecture that constrains the AI to answer only from your validated documents, with source citation and automatic escalation when confidence is low.
Is it GDPR-compliant? Yes, provided data is hosted in Europe, logs are anonymized and you choose an API vendor with a no-data-reuse commitment. This scoping is included in the project.
How much is the API each month? Between 200 and 900 EUR depending on volume, i.e. roughly 0.10 to 0.35 EUR per conversation in 2026. Cost drops with volume and prompt optimization.
Does the bot replace agents? No: it absorbs repetitive tier-1 (40-65% of tickets) and passes complex cases with full context, letting agents focus on high-value requests.
How long to go live? From 5 to 10 weeks depending on scope, including 2 to 3 weeks to structure and clean the knowledge base, the decisive step for quality.
Let's scope your project. Share your monthly ticket volume, your support tools and your target languages, and we'll quote the chatbot and its expected deflection. 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.
