The verdict in three sentences
An AI tender response tool costs 20,000 to 45,000 EUR excl. VAT for a construction SME and is deployed in 10 weeks. It analyses the tender pack in minutes, retrieves the best passages from your past technical proposals and produces a first draft that the estimator edits instead of writing from scratch. Over 120 responses a year, the gain reaches 240 person-days, the equivalent of a full estimating position freed up.
Where the hours of a response go today
The head of estimating knows the problem: pricing is the core job, yet most of the time goes into reading the consultation file and writing the technical proposal. Each proposal is copied from an old one, adapted by hand, with the risk of missing a requirement buried in the rules or the technical specifications.
| Response step (structural works lot, public contract) | Before | With the AI tool |
|---|---|---|
| Reading and summarising the tender pack | 1 day | 0.25 day |
| Requirements compliance grid | 0.5 day | 0.1 day |
| Writing the technical proposal | 2 days | 0.75 day |
| Pricing (bill of quantities, subcontracting) | 1 day | 1 day |
| Review, formatting, submission | 0.5 day | 0.4 day |
| Total per response | 5 days | 2.5 days |
| Internal cost (450 EUR per loaded day) | 2,250 EUR | 1,125 EUR |
2026 order of magnitude. The AI does not touch pricing, which remains your expertise and your responsibility. It removes the reading and copying work, freeing time to polish technical value, often weighted at 40 to 60% of the final score.
What a custom tool contains and what it costs
A subscription to a general-purpose assistant is not enough: it knows neither your project references, nor your equipment, nor your methods. The value comes from indexing your own document base.
| Component | Function | 2026 cost excl. VAT |
|---|---|---|
| Indexing past proposals (200 to 500 documents) | Finds relevant passages by lot and type of works | 4,000 to 8,000 EUR |
| Automatic tender pack analysis | Extracts requirements, criteria, documents due, dates | 5,000 to 10,000 EUR |
| Technical proposal generator | Structured first draft following the rules, sources cited | 6,000 to 15,000 EUR |
| References and CV library | Up-to-date project sheets, certificates, staff | 2,000 to 6,000 EUR |
| Interface and access rights | Workspace per bid, history, Word export | 3,000 to 6,000 EUR |
| Inference cost | Calls to the language model | 1 to 4 EUR per file |
| Maintenance and EU hosting | Updates, backups | 250 to 600 EUR per month |
Usage cost is negligible: 120 files at 4 EUR come to 480 EUR a year. What matters is the quality of the initial indexing, which is why sorting your best proposals before the project pays off.
Limits to know before signing
The tool produces a draft, not a bid. Three safeguards remain essential. First, every technical commitment (timeline, resources, method) must be reviewed by the person who will deliver it. Second, a public buyer quickly spots a generic proposal: the tool must cite real projects and named site managers. Third, tender documents are confidential, so hosting must be in Europe and the model provider contractually bound not to reuse your data.
Mini case study
Need a professional website?
Kolonell builds websites that attract clients, optimized for the Sénégalese market. Free quote in 2 minutes.
Nathalie, head of estimating at a 90-employee structural works SME near Nantes, answers 120 tenders a year with an 18% win rate. The tool costs her 32,000 EUR excl. VAT plus 5,000 EUR a year for hosting and inference. It frees 2.5 days per response, or 300 days a year, 60% of which go into 30 extra responses and 40% into quality. If the win rate rises to 21% on 150 responses, she wins 10 more contracts a year. With a net margin of 15,000 EUR per contract, the gain exceeds 150,000 EUR, and the tool pays for itself by the third contract won.
FAQ
How much does an AI tender response tool cost for a construction SME?
Between 20,000 and 45,000 EUR excl. VAT depending on the volume of proposals to index and the integrations. Usage adds 1 to 4 EUR per file and 250 to 600 EUR a month of maintenance.
Can the AI do my pricing?
No, and you would not want it to: pricing depends on your purchase prices and commercial strategy. The tool does prepare quantities to check and the list of items in the bill of quantities.
Can a public buyer penalise a proposal written with AI?
They penalise a generic proposal, not the tool used. A proposal citing 5 to 8 comparable projects and named resources scores better, whatever the way it was drafted.
How long until it is operational?
Ten weeks on average: three to sort and index your documents, five for development, two to test on live tenders.
Do our tender packs and proposals stay confidential?
Yes, if hosting is in the European Union and the contract with the model provider excludes training on your data. This must be written explicitly in the quote.
Let's scope your project. Tell us how many tenders you answer a year and how many proposals you can index: we price a tool between 20,000 and 45,000 EUR excl. VAT, operational in 10 weeks. 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.
