The verdict in three sentences
A custom partner and supplier extranet in Miami costs between 28,000 and 68,000 USD in 2026, with granular permission management and an audit log as standard. Integration with your ERP or via EDI adds 7,000 to 17,000 USD depending on the number of flows. Expect 10 to 16 weeks of delivery time and 15% of the build per year in maintenance.
What a supplier extranet funds
An extranet digitizes orders, acknowledgments and contractual documents with your suppliers. The core issue: granular rights (each supplier sees only their own orders) and full traceability of actions.
| Functional module | Indicative 2026 cost (USD) | Timeline |
|---|---|---|
| Multi-role core + granular permissions | 6,800 - 12,500 | 3 wks |
| Order management + acknowledgments | 5,500 - 11,000 | 2-3 wks |
| Contractual document space + versioning | 4,500 - 9,000 | 2 wks |
| Audit log + traceability | 2,800 - 5,500 | 1-2 wks |
| Procurement dashboards + exports | 3,300 - 6,800 | 2 wks |
| ERP / EDI integration | 7,000 - 17,000 | 3-4 wks |
The low end (28,000 USD) covers the multi-role core, order management and document space. The high end (68,000 USD) adds EDI/ERP, advanced procurement reporting and automation.
Custom build vs SaaS license over 3 years
The procurement director's real question: build or rent? Here is the total cost over 36 months for a mid-sized extranet (around 40 active suppliers).
| Item | Custom build | SaaS license |
|---|---|---|
| Upfront investment | 45,000 USD | 0 - 6,000 USD (setup) |
| Monthly subscription | 0 | 900 - 2,000 USD/month |
| Hosting + maintenance | 6,800 USD/year | included |
| Permission customization | included | 3,500 - 9,000 USD |
| Total cost over 36 months | ~65,000 USD | ~45,000 - 85,000 USD |
| Code ownership | Yes | No |
Over 3 years, custom build becomes competitive as soon as the SaaS subscription exceeds ~1,400 USD/month, with the added bonus of code ownership and no customization limits.
Mini case study
Sophie, procurement director at a mid-market firm in Miami (chemicals, 140 employees), manages 42 active suppliers and processes around 350 orders/month. Data-entry errors (references, quantities) generate an average of 18 disputes/month, each costing about 100 USD in handling time and delays, i.e. 1,800 USD/month.
She invests 48,000 USD in an extranet with permissions, acknowledgments and ERP integration. Errors drop by 75%, saving roughly 1,350 USD/month (16,000 USD/year), not counting accounting time saved. Return on investment in about 3 years, with an owned asset.
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FAQ
What is the difference between an extranet and a client portal?
A client portal serves your clients (documents, tracking); a supplier extranet manages transactional flows (orders, deliveries) with per-partner rights. The extranet is generally more complex, hence a budget of 28,000 to 68,000 USD.
Is ERP integration essential?
Not at launch, but it avoids double entry. Budget 7,000 to 17,000 USD depending on the ERP API quality (SAP, NetSuite, Sage) and the number of flows to synchronize.
How long does it take to deliver an extranet?
Between 10 and 16 weeks. The permissions + orders core ships in 10 weeks; adding EDI/ERP and advanced reporting pushes it to 14-16 weeks.
Isn't SaaS simpler?
For a standard need, yes. But as soon as permission rules or workflows are specific, SaaS forces costly workarounds. Above ~1,400 USD/month in subscription, custom build is often more cost-effective over 3 years.
What maintenance budget?
Plan on 15% of the build per year, i.e. around 7,200 USD/year for a 48,000 USD extranet. This covers security, fixes and minor enhancements.
Let's scope your project. Tell us your number of suppliers, your flows (orders, EDI, ERP) and your permission rules, and we will quote an extranet in the 28,000-68,000 USD range. 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.
