The verdict in three sentences
A contract analysis AI able to extract clauses, dates and obligations costs between 15,000 and 50,000 EUR in 2026 depending on the number of document types and required precision. Expect 6 to 12 weeks, a RAG architecture and systematic human verification on sensitive cases. The main gain: going from 45 to 10 minutes of analysis per file, with a target precision above 90%.
What the project costs by building block
The budget splits between document ingestion, the RAG engine, the review interface and secure production. 2026 order of magnitude for a London firm.
| Block | Content | 2026 price (EUR) |
|---|---|---|
| Ingestion + OCR | PDF, scans, tables | 3,000 - 7,000 |
| RAG engine | Indexing, semantic search | 6,000 - 15,000 |
| Clause extraction | Prompts, schema, validation | 4,000 - 12,000 |
| Review interface | Highlighting, human correction | 4,000 - 10,000 |
| Security + EU hosting | GDPR, logging | 3,000 - 8,000 |
| Testing + tuning | Test sets, calibration | 2,000 - 6,000 |
A complete project usually lands between 22,000 and 38,000 EUR.
Time saved and inference cost
AI does not replace the lawyer: it prepares the file and the lawyer validates. The table quantifies the impact for a firm handling 400 contracts a month.
| Indicator | Without AI | With AI + review |
|---|---|---|
| Analysis time/file | 45 min | 10 min |
| Files handled/day/lawyer | 8 | 30 |
| Extraction precision | manual | > 90% (to validate) |
| Inference cost/file | - | 0.05 - 0.20 EUR |
| Monthly inference cost (400) | - | 20 - 80 EUR |
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
Mini case study
Mr. Laurent is a partner in a 12-lawyer firm in central London. Each lawyer analyzes about 8 contracts a day by hand, i.e. 45 minutes per file. With extraction AI plus human review, time drops to 10 minutes, raising capacity to 30 files per day. On a fully loaded hourly cost of 70 EUR, analyzing a file goes from 52.50 EUR to 11.70 EUR (inference included), i.e. 40.80 EUR saved per file. Over 400 files/month, gross savings reach 16,320 EUR/month. With a 34,000 EUR investment, the project pays for itself in about 2.5 months of real production.
FAQ
Can the AI get a clause wrong? Yes, which is why human verification is mandatory on high-stakes clauses. We aim for over 90% precision measured on an annotated test set before go-live.
Is contract data exposed? No, if you use EU hosting and models with a no-training commitment. Logging and role-based access are included in the security block (3,000 to 8,000 EUR).
What does inference really cost? In 2026, budget 0.05 to 0.20 EUR per file depending on contract length and model. For 400 files/month, that is 20 to 80 EUR, negligible against the time saved.
Can you analyze contracts in English and French? Yes, RAG models handle multilingual natively. You simply calibrate prompts and the extraction schema per language and per contract type.
How long for a usable first result? A proof of value on one contract type takes 3 to 4 weeks. The full multi-type project with review interface takes 6 to 12 weeks.
Let's scope your project. Tell us your contract types, monthly volume and the key clauses to extract: we will frame scope, target precision and indicative budget. 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.
