How much does a MedusaJS implementation cost in 2026?
A Medusa v2 plus Next.js MVP at GMI Software is typically EUR 25,000 - 45,000; B2B with ERP EUR 55,000 - 120,000; audit and roadmap EUR 3,500 - 8,000. Initial estimate in 48h, fixed price after DDT with a price guarantee.
What drives Medusa implementation cost?
MedusaJS v2 is open-source - you pay no SaaS license or GMV take-rate. Implementation cost is team effort: Next.js storefront, B2B modules, integrations and data migration. The more systems beside commerce (ERP, PIM, WMS, CRM, B2B payments), the higher the budget and longer the discovery timeline.
The commerce model matters. Pure D2C with one warehouse and standard checkout is a different scope than B2B with contract pricing, credit limits, order approval workflows and marketplace split checkout. Every extra business rule is a custom module or order lifecycle extension.
Channel count adds cost too: web, React Native app, maybe POS or partner portal - all should share one Medusa API, but each channel is a separate front and regression surface. Data quality when migrating from Magento or legacy ERP often adds 20-30% effort for catalogue cleanup and attribute mapping.
Budget ranges by project phase
Audit and roadmap (1-2 weeks): EUR 3,500 - 8,000. Output: integration map, data assessment, architecture sketch and full-build range. The cheapest way to avoid a fixed price built on guesses.
D2C MVP (Medusa v2 plus Next.js, payments, basic catalogue): EUR 25,000 - 45,000. Timeline 3-5 months to production. Enough when ERP is out of scope and the catalogue stays under roughly 10k SKUs.
B2B with ERP (price lists, credit limits, order sync): EUR 55,000 - 120,000. Timeline 5-9 months. Depends on integration count and historical data quality.
Multi-vendor marketplace with split checkout: EUR 80,000 - 150,000+. Needs vendor onboarding modules, split payments (Stripe Connect/Adyen) and custom OMS. Dedicated Medusa developer on retainer: from EUR 5,200/month (EU nearshore, senior).
DDT and fixed price - how GMI quotes
Initial estimate after a first call and short brief: 48h, budget range with no commitment. A full fixed-price offer requires DDT (Discovery, Design and Technology): business and IT workshops, data audit, clickable UX mocks for critical flows (B2B checkout, company account onboarding) and an architecture diagram with an integration list.
DDT usually runs 1-3 weeks and ends with a scope document and fixed-price guarantee on agreed work. If technical blockers appear inside that scope during delivery, GMI absorbs them - this is not open-ended T&M with surprise invoices.
What falls outside fixed price without a separate quote: business changes after scope sign-off (new markets, new marketplace model), integrations unknown at DDT, and product content/copy. We price those via transparent change requests.
Hidden costs worth planning for
Cloud infrastructure (AWS, GCP): EUR 300 - 2,000/month depending on traffic and environments (staging, prod, DR). Medusa does not need expensive managed hosting, but production B2B with ERP integrations needs monitoring, backups and autoscaling for peaks.
Post go-live run cost: 15-25% of initial build per year with active product development (new features, compliance, Medusa upgrades). On a stable store with few iterations you can land at 10-15% - SLA, security patches, dependency updates.
Data migration and regression testing are often under-estimated. Importing 50k SKUs with bad attributes, duplicate EANs and legacy B2B price lists can add 4-8 weeks of analyst and developer time. Better to surface that in DDT than discover it in sprint 3.
Next step: Medusa estimate
If you have an architecture sketch (even a slide), integration list and business deadline - contact GMI. You get budget ranges within 48h; full fixed-price offer after DDT.
MedusaJS development service details: https://gmi.software/services/medusajs-development
Sources and references
MedusaJS pricing model (open-source): https://medusajs.com/pricing
MedusaJS v2 documentation: https://docs.medusajs.com
GMI agency service: https://gmi.software/services/medusajs-development
Frequently asked questions
- Can I get a fixed price?
- Yes - after DDT we offer a fixed-price guarantee on agreed scope. Technical blockers inside that scope are on GMI.
- How long does Medusa B2B delivery take?
- D2C MVP: 3-5 months. B2B with ERP: 5-9 months. Multi-vendor marketplace: 6-12 months. Timeline depends on integrations and migration data quality.
- Is one developer cheaper than an agency?
- A freelancer hourly rate can be lower, but without QA, architecture, PM and ERP integration experience total cost and delay risk rise. An agency with fixed price after DDT gives predictable budget and delivery accountability.
- What does Medusa run cost after launch?
- Typically 15-25% of initial build per year with active development; 10-15% on a stable store. Covers hosting (EUR 300-2000/month), monitoring, upgrades and small SLA iterations.
Content updated: July 2, 2026