The verdict in three sentences
For a general contractor handling 150 tenders a year, a custom platform costs EUR 25,000 to 55,000 excl. VAT in 2026 and ships in about 4 months. The return does not come from time savings alone but from the win rate, which can rise from 12% to 18% once BOAMP monitoring, go/no-go decisions and reuse of technical proposals are structured. With an average contract worth EUR 400,000, nine extra wins a year change the size of the business.
What a construction tender platform does
The sales director of a general contractor currently juggles email alerts, a tracking spreadsheet, shared folders full of Word technical proposals and phone follow-ups with subcontractors. The platform centralises the whole cycle:
- Automated monitoring: daily queries of BOAMP and TED notices (public API) plus followed buyer profiles, filtered by CPV codes, regions, estimated value and lot type.
- Assisted go/no-go: a scoring grid (lot size, similar references, team workload, target margin) approved by the committee in 10 minutes.
- Technical proposal library: reusable paragraphs sorted by trade (structural work, HVAC, civil works), project references with photos, site managers' CVs, up-to-date certificates.
- Response schedule: tasks per writer, submission deadline, questions to the buyer, alerts at D-7 and D-2.
- Subcontractor consultation: partial tender files sent out, quotes collected and compared.
- Post-award analysis: rejection reason, technical score, winning price, to sharpen the next bids.
| Module | Key function | Indicative 2026 budget (excl. VAT) | Development effort |
|---|---|---|---|
| BOAMP / TED monitoring | Daily import, CPV and area filters | EUR 4,000 to 8,000 | 2 to 3 weeks |
| Go/no-go and pipeline | Scoring, kanban, dashboard | EUR 5,000 to 10,000 | 3 weeks |
| Technical proposal library | Reusable blocks, full-text search | EUR 6,000 to 12,000 | 3 to 4 weeks |
| Schedule and alerts | Tasks, deadlines, notifications | EUR 3,000 to 7,000 | 2 weeks |
| Subcontractor consultation | File sending, quote collection and comparison | EUR 4,000 to 9,000 | 2 to 3 weeks |
| Post-award analysis | Scores, winning prices, statistics | EUR 3,000 to 9,000 | 2 weeks |
The core (monitoring, pipeline, library, alerts) sits around EUR 25,000. The full version with subcontractor consultation, AI-assisted proposal drafting and an ERP connector reaches EUR 50,000 to 55,000.
Custom build or off-the-shelf software?
SaaS tools for public tender monitoring exist, but they are designed for every sector. Construction has specific needs: lots, variants, mandatory site visits, geolocated project references, declared subcontracting (DC4 form).
| Criterion | Generic monitoring SaaS | Custom platform |
|---|---|---|
| Annual cost | EUR 2,400 to 9,000 per year | EUR 25,000 to 55,000 once, then EUR 3,000 to 6,000 maintenance |
| BOAMP monitoring | Yes | Yes, with construction filters |
| Proposal library | Limited or none | Structured by trade and reference |
| Subcontractor consultation | No | Yes |
| Data ownership | With the vendor | Yours, hosted in France |
| ERP / estimating integration | Rare | Custom (quantities, unit prices export) |
| Time to go live | 1 week | 4 months |
Over 5 years, a EUR 6,000-a-year SaaS for 8 users costs EUR 30,000 with no trade-specific library. A EUR 35,000 custom platform plus EUR 4,000 annual maintenance costs EUR 55,000, but it drives the win-rate gain.
Typical 4-month schedule
| Phase | Duration | Deliverable |
|---|---|---|
| Scoping workshops | 2 weeks | Bid process map, go/no-go grid |
| Mock-ups | 2 weeks | Screens approved by the sales director and two writers |
| Development batch 1 | 6 weeks | Monitoring, pipeline, library |
| Development batch 2 | 4 weeks | Schedule, subcontractors, statistics |
| Data migration | In parallel | 200 to 500 technical proposals and references imported |
| Acceptance and training | 2 weeks | Go-live, 2 training sessions |
Mini case study
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Thomas, sales director of a 120-employee general contractor near Nantes, answers 150 tenders a year with a 12% win rate, or 18 contracts won. The average contract is worth EUR 400,000 with a 5% net margin, or EUR 20,000 per contract.
After deploying a EUR 38,000 platform, the team drops 30 poorly targeted bids thanks to go/no-go and focuses on 120 better-written responses. At an 18% win rate, it wins 21.6 contracts, about 3 more than before. Margin gain: 3 × EUR 20,000 = EUR 60,000 a year. Writing time per bid falls from 22 to 15 hours, freeing 1,800 hours. Payback is about 8 months (2026 order of magnitude, excluding the effect on site team workload).
FAQ
How much does a tender management platform for construction cost?
Budget EUR 25,000 excl. VAT for a core of monitoring, pipeline and library, and up to EUR 55,000 with subcontractor consultation and AI assistance. Annual maintenance is 10 to 15% of the initial budget.
Can BOAMP monitoring be automated?
Yes, BOAMP publishes its notices through an open API. The platform queries them every night, applies your CPV and geographic filters, and sends 5 to 20 relevant notices instead of 200 raw alerts.
What win-rate gain is realistic?
Moving from 12% to 18% is achievable within 12 to 18 months, mainly through go/no-go screening that removes 20 to 30% of low-probability bids. This remains an estimate that depends on the quality of your references.
Can we reuse our old technical proposals?
Yes, migrating 200 to 500 Word documents is included. They are split into themed blocks (method, safety, environment) so a proposal is assembled in 2 hours instead of a full day.
Where is the data hosted?
In France, with a provider such as OVHcloud or Scaleway, for about EUR 80 to 200 excl. VAT per month. Your prices and references remain your property.
Let's scope your project. Send us your annual tender volume and current tools, and we will price a platform between EUR 25,000 and 55,000 excl. VAT with a 4-month plan. 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.
