The verdict in three sentences
For a manufacturer in Miami with 3,000 technical documents spread across SharePoint, network drives and scanned PDFs, a RAG AI assistant costs USD 13,000 to 33,000 to build and USD 110 to 650 a month to run. The value comes from three non-negotiable requirements: access rights inherited from the sources, answers that cite the document and page, and US-based hosting under your control. With 25 minutes saved per technician per day, the project usually pays back in under 6 months.
What a RAG assistant costs in 2026
RAG (retrieval-augmented generation) means indexing your documents, retrieving the relevant passages for each question, then having a language model write the answer based only on those passages. The cost depends on source quality and the number of connectors.
| Item | Content | 2026 budget (USD) |
|---|---|---|
| Scoping and source audit | Inventory, duplicates, obsolete versions, permissions | 2,200 to 4,400 |
| Connectors | SharePoint, network shares, document management, ERP | 2,700 to 7,700 |
| Document processing | OCR of scanned PDFs, chunking, tables, diagrams | 2,200 to 6,600 |
| Search and answer engine | Vector index, hybrid search, citations | 3,300 to 7,700 |
| Permission management | Microsoft 365 permission inheritance, access log | 1,600 to 4,400 |
| Interface | Web, Teams or shop-floor tablet | 1,100 to 3,300 |
| Testing and evaluation | 150 to 300 reference questions, accuracy measurement | 1,100 to 2,700 |
| Total project | Depending on complexity | 13,000 to 33,000 |
Beyond that, recurring cost combines model API calls, index hosting and maintenance. For 40 users asking 15 questions a day, the API bill usually stays under USD 165 a month.
Recurring costs and hosting choices
The choice between a hosted model API and a self-hosted open source model strongly affects the monthly bill and the level of data control.
| Option | Monthly cost (2026 order of magnitude) | Data | Answer quality |
|---|---|---|---|
| Model API with US region | USD 110 to 330 | Processed in the US, not used for training | High |
| API + index on your own cloud tenant | USD 220 to 500 | Index in your tenant, API calls in the US | High |
| Open source model on rented GPU server | USD 440 to 650 | Everything stays with your host | Good, improving |
| Open source model on internal server | USD 165 of power and upkeep, plus USD 9,000 to 16,500 of hardware | Everything stays in the plant | Good |
| Generic tool license | USD 20 to 35 per user per month | Depends on vendor | Variable, few precise citations |
For a mid-sized manufacturer, the API option with the index in your own cloud tenant offers the best balance. The contract must exclude any use of your data for training, and for ITAR or export-controlled documents, keep those out of scope or self-host.
What makes these projects fail
The technology works. Failures almost always come from the sources: three versions of the same procedure, crooked scanned PDFs, confidential documents open to everyone. Before development starts, check these points.
| Risk | Symptom | Countermeasure |
|---|---|---|
| Multiple versions | Answer based on an outdated procedure | Rule: only the approved version is indexed |
| Ignored permissions | A technician reads an HR document | Strict SharePoint permission inheritance |
| Made-up answers | Wrong torque value | Mandatory citation, refusal when no source |
| Scanned documents | Unreadable tables | OCR with table recognition, check on 50 pages |
| Low adoption | Under 20% usage after 2 months | Access from Teams and shop-floor tablets, champions per team |
Mini case study
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Michael, engineering director of a machinery manufacturer near Miami, manages 40 technicians in maintenance and production. Each loses on average 25 minutes a day looking for a procedure or calling an experienced colleague. Over 210 working days: 40 × 25 min × 210 = 3,500 hours a year. At a loaded cost of USD 50 an hour, that is USD 175,000.
The assistant is quoted at USD 24,000, plus USD 385 a month for API, hosting and maintenance, or USD 28,620 in year one. Even recovering only half of the lost time, the gain reaches USD 87,500. Onboarding a new technician also drops from 3 months to 6 weeks, which matters with 6 hires a year.
FAQ
Could our confidential documents leak?
Not if the assistant inherits SharePoint permissions and the API contract excludes training on your data. An access log keeps every question and every document consulted for 12 months.
How long until the assistant is live?
Count 6 to 10 weeks for 3,000 documents, including 2 weeks of source cleanup and 2 weeks of testing with 5 to 10 pilot technicians.
What accuracy can we expect?
On well-structured procedures, 85 to 92% correct and sourced answers on a set of 200 reference questions. The assistant must answer 'I don't know' rather than invent.
Can it be used on a tablet on the shop floor?
Yes, a tablet-friendly web interface and a Teams integration cost USD 1,100 to 3,300. Voice search adds about USD 1,600.
What happens when a procedure changes?
Sync re-indexes modified documents every night or in real time. The new version replaces the old one within 24 h at most.
Let's scope your project. We audit your document sources and then price an AI assistant aligned with your access rights, with an indicative budget and a 6 to 10-week pilot. 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.
