The verdict in three sentences
For a general contractor submitting 150 bids a year, a custom tender management platform costs EUR 40,000 to 85,000 excl. VAT and ships in 4 to 6 months. The main gain does not come from tender monitoring, which off-the-shelf tools handle well, but from reusing technical proposals and collaborative pricing, which cut time per bid by 30 to 40%. If your win rate is below 20% and you do not know which trade packages you actually win, the project pays back in under 18 months.
What each module costs in 2026
A construction tender platform is built in blocks. Here are 2026 ballpark figures from a French or mixed France / West Africa development team, excluding third-party licences.
| Module | Function | 2026 budget excl. VAT | Timeline |
|---|---|---|---|
| BOAMP / TED / buyer portal monitoring | Automatic notice import, CPV filters, regional alerts | EUR 6,000 to 12,000 | 3 to 4 weeks |
| Go / No Go | Scored decision grid, history of declined bids | EUR 3,000 to 6,000 | 2 weeks |
| Technical proposal library | Reusable blocks, project references, CVs, up-to-date certificates | EUR 9,000 to 18,000 | 5 to 7 weeks |
| Collaborative pricing | Imported bills of quantities, split per package, subcontractors, margins | EUR 10,000 to 22,000 | 6 to 8 weeks |
| Review and submission workflow | Review circuit, reverse schedule, compliance checklist (ESPD, forms) | EUR 5,000 to 10,000 | 3 weeks |
| Performance dashboard | Win rate per package, per buyer, price gap to lowest bidder | EUR 4,000 to 9,000 | 2 to 3 weeks |
| AI writing assistant | Paragraph suggestions drawn from winning proposals | EUR 3,000 to 8,000 | 2 to 3 weeks |
A core of "monitoring + library + pricing + dashboard" lands around EUR 40,000 to 55,000 excl. VAT. The full version with AI, ERP integration (Sage BTP, Onaya, Batigest) and e-signature reaches EUR 70,000 to 85,000 excl. VAT. Then budget 8 to 12% of the initial cost per year for maintenance and EU hosting.
Custom build or off-the-shelf software?
Specialised tools exist: tender monitoring services, estimating software, tender management suites. The choice depends on your volume and how specific your trade packages are.
| Criterion | Monitoring subscription + estimating software | Custom platform |
|---|---|---|
| Year 1 cost | EUR 8,000 to 20,000 excl. VAT | EUR 40,000 to 85,000 excl. VAT |
| Years 2 to 5 cost | EUR 8,000 to 20,000 excl. VAT per year | EUR 4,000 to 9,000 excl. VAT per year |
| Cumulative 5-year cost | EUR 40,000 to 100,000 excl. VAT | EUR 56,000 to 121,000 excl. VAT |
| Structured proposal library | Partial, often in a separate document system | Native, linked to packages and results |
| Win rate per package and per buyer | Rarely available | Included |
| Ownership of data and code | No | Yes |
| Fit with your trades | Limited | Full |
Below 60 bids a year, a subscription is enough. Above 120 bids, or if you bid in consortia with partners, custom becomes profitable because it builds value from every submission.
Technical factors that move the price
Three topics drive the budget. Tender document import: automatically retrieving files from buyer portals (PLACE, Maximilien, AWS-Achat) requires robust connectors, add EUR 4,000 to 7,000. Pricing: importing heterogeneous Excel bills of quantities and splitting them by package is the trickiest module, plan a 2-week scoping phase. Permissions: a sales director, project managers, cost estimators and external subcontractors need different access, and traceability of price versions is essential.
Mini case study
Marc, sales director of a general contractor with EUR 90M in revenue in the Auvergne-Rhône-Alpes region, runs 150 bids a year with a team of 6. Each bid takes an average of 42 hours (proposal, pricing, admin), or 6,300 hours a year.
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- Custom platform: EUR 62,000 excl. VAT, delivered in 5 months.
- Measured gain on writing and consolidation time: 35%, or 15 hours per bid, 2,250 hours a year.
- Average loaded hourly cost of the team: EUR 55, so EUR 123,750 of time freed per year.
- Win rate up from 18% to 22% by focusing effort on winning packages: 6 extra contracts a year.
Return on investment: under 7 months on time saved alone, before counting additional contracts.
FAQ
How long does it take to build a construction tender platform?
Allow 4 to 6 months for a full version, including 2 to 3 weeks of scoping. A first monitoring and library module can go live by week 8.
Can BOAMP monitoring be automated?
Yes, BOAMP publishes notices through an open API and TED feeds are accessible. The module costs EUR 6,000 to 12,000 excl. VAT with filters by CPV code, region and estimated value.
Can we import our old technical proposals?
Yes, migrating 200 to 500 Word or PDF documents takes 2 to 3 weeks, split into reusable blocks. Budget EUR 3,000 to 6,000 excl. VAT depending on file quality.
Can AI write our proposals?
It suggests paragraphs based on your winning proposals and the tender requirements, which cuts writing time by 20 to 30%. Human review remains mandatory, since the technical score often weighs 40 to 60% of the ranking.
Where is the data hosted?
In France or the European Union, with an ISO 27001 certified host. Hosting a platform of this size costs EUR 150 to 400 excl. VAT per month.
Let's scope your project. Send us your bid volume, trades and current tools: we will price a scope between EUR 40,000 and 85,000 excl. VAT with a 4 to 6 month schedule. 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.
