The verdict in three sentences
A viable multi-vendor B2B marketplace in Singapore starts at SGD 70k for a custom MVP and reaches SGD 180k with advanced KYC, rich catalog and split invoicing. A SaaS solution like Mirakl avoids heavy development but locks in ~SGD 100k/year in licensing, making custom builds cheaper from year two. The real profitability lever is not the tech stack but the take rate: an 8-12% commission on sufficient transaction volume pays back the platform in 12 to 24 months.
SaaS marketplace vs custom build: the real 2026 cost
The decision hinges on payback horizon and product control. SaaS speeds up launch; custom removes the licensing rent and frees the roadmap.
| Criterion | SaaS (Mirakl-like) | Custom (Kolonell) |
|---|---|---|
| Year 1 cost | ~SGD 100k | SGD 70k-180k |
| Year 2+ cost | ~SGD 100k/year | SGD 14k-30k/year (maintenance) |
| Time to launch | 3-4 months | 4-6 months |
| Customization | Framework-bound | Full |
| Code ownership | No | Yes |
| Split payments | Included (volume fee) | Integrated (Stripe Connect) |
| 3-year cost | ~SGD 300k | SGD 110k-240k |
Over three years, custom becomes clearly cheaper once volume justifies a dedicated platform.
Cost breakdown of a B2B marketplace MVP
A credible MVP is not a shop with several accounts: you need vendor onboarding, moderation, split and reporting.
| Item | 2026 range (SGD) | Detail |
|---|---|---|
| UX/UI + design system | 9k-22k | Buyer flow + vendor back office |
| Multi-vendor catalog | 12k-30k | Listings, variants, faceted search |
| Split payments + payouts | 11k-27k | Stripe Connect, reconciliation |
| KYC / supplier onboarding | 6k-18k | SGD 3-12 per verified vendor |
| Commissions & invoicing | 8k-21k | 8-12% scale, auto invoices |
| Back office & moderation | 9k-24k | Disputes, product approval |
| QA, security, go-live | 8k-18k | Testing, compliance, monitoring |
KYC is often underestimated: at SGD 3-12 per vendor, 500 suppliers already mean SGD 1.5k-6k of annual operating cost.
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Mini case study
Wei Ling, founder of a B2B industrial-parts marketplace in Singapore, targets 80 vendors and SGD 6M GMV in year one. She picks a custom MVP at SGD 108k over Mirakl (SGD 100k/year). With an average 10% commission, she generates SGD 600k of platform revenue in year one. After the build and SGD 20k of maintenance, her net result exceeds SGD 470k, and she avoids SGD 100k of recurring license from year two.
FAQ
What is the minimum budget to launch a B2B marketplace in 2026? Plan for SGD 70k for a genuinely multi-vendor custom MVP with split payments and supplier onboarding. Below that you get a disguised shop, not a platform.
Mirakl or custom? Mirakl wins if you want to launch in 3 months without a tech team. Custom wins over 3 years: ~SGD 300k of cumulative license versus SGD 110k-240k with code ownership.
What take rate should I apply? The 2026 B2B standard sits between 8 and 12% depending on added value (logistics, warranty, financing). Below 8%, the marketplace struggles to self-fund.
How much does supplier KYC cost? Between SGD 3 and 12 per verified vendor (documents, identity, bank details). Also budget the human cost of moderation, rarely included in low-cost quotes.
What is a realistic timeline? From 4 to 6 months custom for a solid MVP. Trying to ship in 6 weeks almost always means rebuilding split payments and security.
Let's scope your project. Tell us your perimeter (vendor count, target GMV, take rate, KYC), indicative budget and timeline, and we'll frame the best SaaS vs custom option. 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.
