The verdict in three sentences
For a regional distributor that wants to open its catalogue to 80 third-party suppliers, Mirakl starts at around USD 110,000 a year in licence and operations, while a custom marketplace costs USD 130,000 to 330,000 to build. With an 8 to 15% commission, the model only pays off above roughly USD 1.6 to 3.3 million of seller sales a year. Below that, a phased custom build or a middle-ground solution limits the risk.
What a B2B marketplace must cover
The e-commerce director of an industrial supplies distributor in Toronto sells 15,000 SKUs from its own stock today. He wants to reach 120,000 SKUs by adding 80 suppliers, without buying inventory. The project spans five building blocks: seller onboarding (business registration, bank details, terms), catalogue integration (files, APIs, feeds), multi-seller ordering, payment splitting with automatic payouts, and disputes and returns.
| Block | Mirakl | Custom build | Watch-out |
|---|---|---|---|
| Seller onboarding and KYC | Native, very complete | USD 16,000 to 38,000 | KYC handled by the payment provider |
| Catalogue integration (15,000 to 120,000 SKUs) | Native, assisted mapping | USD 27,000 to 66,000 | Supplier data quality |
| Multi-seller cart and checkout | Native | USD 22,000 to 55,000 | Shipping fees per seller |
| Payment splitting and payouts | Via Stripe Connect, Adyen for Platforms, Mangopay | USD 11,000 to 33,000 | Money transmission rules |
| Configurable commissions (8 to 15%) | Native | USD 9,000 to 22,000 | Rates per category and seller |
| Disputes, returns, ratings | Native | USD 13,000 to 38,000 | Internal process to define |
| Back office and analytics | Native | USD 22,000 to 66,000 | Seller dashboards |
Comparing three-year cost
The Mirakl licence includes hosting, upgrades and robustness proven with large enterprises. It often includes a variable share on seller sales. A custom build costs more in year one, then only maintenance.
| Item (2026 estimate) | Mirakl | Custom build |
|---|---|---|
| Implementation / build | USD 66,000 to 165,000 (integrator) | USD 130,000 to 330,000 |
| Annual licence or maintenance | USD 110,000 to 275,000 | USD 20,000 to 50,000 |
| Payment provider fees | 0.5 to 1.5% of flows | 0.5 to 1.5% of flows |
| Time to launch | 4 to 6 months | 6 to 9 months |
| 3-year total cost (median scenario) | USD 530,000 to 660,000 | USD 220,000 to 385,000 |
| Code ownership | No | Yes |
Note that payment splitting is not just a development task. To collect money on behalf of third parties you go through a licensed platform payments provider (Stripe Connect, Adyen for Platforms, Mangopay) or register as a money services business yourself. That applies to both options.
How to decide
Mirakl makes sense when seller sales are expected to exceed USD 11 million within three years, when seller count is heading into the hundreds and when the internal team is small. A custom build suits a marketplace of 50 to 150 suppliers with specific business rules: free freight thresholds per seller, B2B quotes, negotiated customer prices. A third path exists: start on an open-source base or a focused custom build at USD 130,000, validate the model with 20 suppliers, then expand.
Mini case study
Daniel, e-commerce director of an industrial supplies distributor in Toronto, targets 80 suppliers and USD 4.4 million of seller sales in year 3, with an average 11% commission. That means USD 484,000 of annual commission at maturity. A custom build at USD 200,000 plus USD 33,000 of yearly maintenance brings the three-year cumulative cost to USD 266,000. With Mirakl it would exceed USD 495,000. On his projections, Daniel covers the custom investment in year two, with roughly USD 176,000 of commission in year 1 and USD 330,000 in year 2.
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FAQ
What commission rate should a B2B marketplace charge?
Between 8 and 15% depending on sector margins: 8 to 10% on heavy equipment, 12 to 15% on consumables and small supplies. Set per-category rates from day one.
How long to onboard 80 suppliers?
Allow 4 to 6 months. A seller with a clean feed integrates in 2 to 5 days, one sending Excel files in 2 to 3 weeks.
Do we need a payments licence?
Not if you use a licensed provider such as Stripe Connect or Mangopay, which charge 0.5 to 1.5% of flows. Your own registration only makes sense at very large volumes.
Can we keep our current website?
Yes, the marketplace can plug into the existing store if it handles multiple sellers per cart. Otherwise plan a front-end rebuild at USD 33,000 to 88,000.
Is a custom build riskier?
It is when the specification is vague. A phased launch, with an MVP covering 20 suppliers in 4 months, sharply reduces the risk.
Let's scope your project. Share your target supplier count, SKU count and projected seller sales, and we will compare Mirakl and custom over three years and price an MVP from USD 130,000. 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.
