The verdict in three sentences
In 2026, a vendor SaaS (EUR 30-80 per user/month) remains the right call for an agency with fewer than ten agents that wants to start fast. Beyond that, or as soon as you need finely tuned buyer matching and automated portal distribution without per-listing surcharges, custom software (EUR 30,000-70,000) pays off over three years. The real question is not the sticker price but the TCO measured against mandates managed and revenue per agent.
Vendor vs custom: the 2026 benchmark
Market suites bill per user, with add-ons (distribution, e-signature, prospecting) that inflate the bill fast. Custom is a one-off amortized investment plus annual maintenance.
| Criterion | Vendor SaaS | Custom build |
|---|---|---|
| Entry cost | EUR 0 to 2,000 setup | EUR 30,000 to 70,000 |
| Monthly cost | EUR 30-80/user/month | EUR 300-600 (hosting + maintenance) |
| Portal distribution | often an add-on (+EUR 15-40/mo) | included, unlimited |
| E-signature | EUR 1-3/document | integrated or API at cost |
| Buyer matching | standard rules | algorithm tuned to your criteria |
| Website integration | generic widget | native, real time |
| Data ownership | limited export | 100% owned |
What actually tips the calculation
Three line items widen the gap. Distribution: at EUR 25/month per extra portal across 6 agents, you top EUR 1,800/year just to publish. E-signature: 500 offers and mandates a year at EUR 2 is EUR 1,000 annually. Matching: surfacing the 3 right buyers the moment a mandate is signed saves weeks of selling time.
| Item | 6-agent agency (vendor) | Custom |
|---|---|---|
| Licenses | 6 x EUR 60 x 12 = EUR 4,320/yr | 0 |
| Multi-portal distribution | EUR 1,800/yr | included |
| E-signature | EUR 1,000/yr | ~EUR 300/yr (API cost) |
| Maintenance / hosting | included | EUR 4,000/yr |
| Annual total | ~EUR 7,120 | ~EUR 4,300 (after investment) |
Mini case study
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Antoine, director of a 3-branch network in Nantes, manages 240 active mandates with 9 agents. On a vendor tool he pays 9 x EUR 65 x 12 = EUR 7,020 in licenses, plus EUR 2,300 for distribution and EUR 1,400 for e-signature, totaling EUR 10,720/year. A custom tool at EUR 52,000 with EUR 4,500/year maintenance costs EUR 15,900 the first year, then EUR 4,500/year. By year three, cumulative savings exceed EUR 8,000, before the commercial upside: if matching sells 4 extra mandates a year at EUR 4,500 average fees, that is EUR 18,000 in added revenue.
FAQ
What does a custom real estate tool really cost in 2026? Expect EUR 30,000-70,000 depending on modules (mandates, prospecting, distribution, e-signature, buyer portal). An MVP focused on mandates and distribution can start around EUR 30,000.
How long to deliver? Between 10 and 18 weeks for a usable first version, depending on the number of portals to connect and matching complexity.
Can I keep my current website? Yes. The whole point of custom is native integration: listings publish to your site in real time with no third-party widget or double entry.
Is a vendor still relevant? Absolutely, below 8-10 users and without heavy automation needs. Custom is justified by mandate volume and the specificity of your processes.
Who owns the client data? With custom, 100% of your data is yours and exportable. Most vendors limit exports and charge for reversibility.
Let's scope your project. Tell us your number of agents, your distribution portals and an indicative budget: we cost vendor vs custom over three years. 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.
