There is no single best B2B marketplace platform. The right product depends on two things: whether you run a multi-seller marketplace or sell your own goods to business buyers, and how the platform’s cost grows as your sales grow. Mercur’s 2026 comparison, updated October 6, 2026, works through ten options that range from open-source code you host yourself to SaaS marketplace overlays, full-stack SaaS and commerce platforms extended with marketplace modules. Most of those prices are negotiated or unpublished, so the decision rests on a cost model and an ownership check more than on a list price.
Marketplace platform or B2B ecommerce: which one do you need?
This is the first question, because it decides whether you need seller-side software at all. In Mercur’s comparison, B2B marketplace software is the system behind a multi-seller marketplace: a buyer storefront, a seller portal, operator administration, and the splitting of orders and payments between suppliers. Business-specific work on top of that can include purchase orders, customer contract pricing, net payment terms and approval chains.
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A B2B ecommerce platform is built for a seller selling to business customers. It may offer business accounts and negotiated pricing, but it does not automatically run independent sellers. Shopify’s 2026 B2B overview, which is vendor-authored, treats account hierarchies, custom pricing, bulk ordering and ERP integration as core B2B commerce needs.
| Requirement | B2B marketplace platform | B2B ecommerce platform |
|---|---|---|
| Several independent sellers on one storefront | Core function | Not automatically provided |
| Seller portal and operator administration | Core function | Not automatically provided |
| Order splitting and payment between suppliers | Core function | Not automatically provided |
| Business accounts and negotiated customer pricing | Can be included as B2B workflow | May be offered |
| Purchase orders, net payment terms, approval chains | Can be included; depends on the product | Depends on the product |
The distinction matters for cost. If you plan to onboard third-party sellers, you need a marketplace platform from the start, even if you launch with a single seller.
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The ten options and how each is built
Mercur’s comparison is a shortlist, not a ranking. Mercur is also one of the ten options, so the list reflects its own selection and categories. The entries describe architectures and reported pricing models; they are not independent product tests. The comparison states that it did not measure support quality, partner networks or roadmap promises, so none of those is established by it.
| Platform | Architecture in the comparison | Pricing picture reported |
|---|---|---|
| Mercur | Open-source marketplace software, self-hosted | Open-source edition is free; Enterprise edition has a commercial license; no GMV fee reported |
| Mirakl | SaaS marketplace overlay | License plus a share of GMV, with a separate commerce platform underneath; no public figure |
| Spryker | Self-hosted or SaaS, by edition | Negotiated enterprise license; the comparison cites a $900,000 per 12-month example via AWS Marketplace, as cited by Mercur |
| OroCommerce | Self-hosted or SaaS, by edition | Tier-based license; no public figure |
| VTEX | Full-stack SaaS | Enterprise contract; no public figure |
| Marketplacer | SaaS marketplace overlay | Negotiated license plus a separate commerce platform; no public figure |
| Adobe Commerce with extensions | Commerce platform plus marketplace extensions | License tied to order volume, plus extension costs |
| Virto Commerce | Self-hosted or SaaS, by edition | Negotiated subscription or license; no public figure |
| CS-Cart Multi-Vendor | Self-hosted | Subscription or one-time license plus hosting; $725 per year or $3,590 one time, as cited in Mercur’s 2026 comparison |
| Yo!Kart B2B | Self-hosted | One-time license plus hosting; no public figure |
What each architecture asks of you
The architecture determines who runs the system and who controls the code and data. That is usually a bigger day-to-day difference than the feature list.
Open-source marketplace software (Mercur)
This model gives you code access. The operator carries hosting, upgrades and maintenance, so it suits an engineering team that expects to own the system. The open-source edition is free; the Enterprise edition is licensed commercially.
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The marketplace layer is hosted by the vendor, but it sits on top of a commerce platform you must also license or run. Plan for two contracts and an integration project, not one. Mirakl is the overlay example used in the next sections.
Full-stack SaaS (VTEX)
One vendor supplies the platform under one contract, which reduces the number of systems to integrate. The trade-off is that the customer-specific behaviour you can build depends on what that vendor’s platform allows.
Self-hosted systems (Spryker, OroCommerce, Virto Commerce, CS-Cart Multi-Vendor, Yo!Kart B2B)
Spryker, OroCommerce and Virto Commerce can be self-hosted or bought as SaaS, depending on edition. CS-Cart Multi-Vendor and Yo!Kart B2B are self-hosted in the comparison. Self-hosting gives control over infrastructure and data, and it moves responsibility for servers and upgrades to your team.
Commerce platform with marketplace extensions (Adobe Commerce)
Marketplace functions are added as extensions to a general commerce platform. Each extension needs maintenance as the core platform changes, so the extension list becomes part of your ongoing workload.
What the platform really costs
A contract price is one line in the budget. Mercur’s comparison identifies these cost categories:
- Platform license, subscription or one-time fee
- GMV share or other sales-linked charges, where the model uses them
- A second commerce platform under an overlay architecture
- Order-volume license tiers and marketplace extension fees in extension-based stacks
- Implementation, and integrations with ERP, CRM, PIM or OMS systems
- Infrastructure and hosting
- Ongoing maintenance and upgrades
- Exit work: the cost of moving data and operations out of the system later
Two published figures, and what they do not show
Mercur’s comparison publishes figures for three of the ten options, counting its own free open-source edition. Seven have no published figure. The two paid examples are:
- CS-Cart Multi-Vendor: $725 per year or $3,590 one time, as cited in Mercur’s 2026 comparison.
- Spryker: $900,000 per 12 months, cited via AWS Marketplace in Mercur’s 2026 comparison.
These are source-reported examples, not quotes you can compare side by side. They do not state the scope of the contract or the cost of implementation, and they should be confirmed directly with each supplier before you rely on them.
Model your cost at three times current sales
Mercur’s comparison recommends modeling cost at three times your current sales volume, because volume-linked charges rise with sales. Use this sequence:
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- Take current annual GMV or sales and multiply it by three.
- Apply each volume-linked charge, such as a GMV share or an order-volume tier, to that figure.
- Add the fixed license or subscription for the same period.
- Add the second commerce platform, extensions, hosting and infrastructure.
- Add implementation, integrations, ongoing maintenance and the estimated cost of leaving the platform.
Market context, with attribution
These figures are reproduced in Mercur’s 2026 comparison and attributed to the named publishers. Check the originals before you cite them in a business plan.
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- U.S. B2B marketplace sales were $351 billion in 2024, up 35%. Source: Digital Commerce 360, 2024, as reported in Mercur’s 2026 comparison. Scope: United States only.
- About 45% of EU enterprises that sold online used a marketplace in 2024. Source: Eurostat, 2024, as reported in Mercur’s 2026 comparison. This is a share of enterprises that sold online, not of all enterprises.
- Marketplaces accounted for 1.3% of total enterprise turnover in the EU in 2024. Source: Eurostat, 2024, as reported in Mercur’s 2026 comparison. The gap between the enterprise share and the turnover share shows that most sales still run through other channels.
- U.S. B2B ecommerce sales reached $2.93 trillion in 2025, up 13% year over year. Source: Digital Commerce 360, as reported in Mercur’s 2026 comparison. This is B2B ecommerce overall, not marketplace-only sales.
How to shortlist
Use these six questions to narrow the ten options to two or three candidates.
- Business model: Decide whether you need a multi-seller marketplace, dropship, a single-seller B2B store or a hybrid.
- Cost at scale: Run the cost model above for each candidate.
- Ownership and control: Ask about source-code access, data control, who hosts the system and how you would migrate out.
- B2B workflow depth: Check contract and customer-specific pricing, bulk orders, purchase orders, quote and approval workflows, payment terms, organizational accounts and order splitting.
- Integration and operations: Map ERP, CRM, PIM and OMS connections, seller onboarding, inventory and catalog synchronization, settlement and support requirements.
- Build versus buy: Separate what works on day one from what needs extensions or custom development.
Match the model to your situation
- If you sell only your own products to business customers, start with B2B ecommerce platforms. A marketplace platform adds seller operations you will not use.
- If third-party sellers will be paid through your platform, shortlist marketplace platforms and confirm how order splitting and settlement work before you commit.
- If your engineers will own the code, look first at the open-source and self-hosted options.
- If you do not want to run infrastructure, look at the SaaS options, and budget for the second commerce platform if you choose an overlay.
Mirakl: what the vendor says
Mirakl is the SaaS overlay used as the example in the comparison, with a license plus a share of GMV and a separate commerce platform underneath. Its official Marketplace Platform page describes B2B use by manufacturers and distributors in this sentence:
“Retailers run B2C marketplaces while manufacturers and distributors use the same platform for B2B — with native support for bulk pricing, customer-specific pricing, payment on terms, and quote management.”
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This is Mirakl’s own statement from its official product page, not an independent verification. The same page says the platform supports marketplace and dropship models from one instance.
Mirakl Connect is a separate product. It is a multichannel selling service with connectors for Shopify, Adobe Commerce, WooCommerce and BigCommerce, and volume-based pricing, according to Mirakl’s official page. It supports seller operations and is not the operator platform in the ten-option list.
Quick Recap
Adjacent B2B ecommerce products to keep separate
Shopify’s 2026 B2B overview lists fifteen platforms: Shopify, BigCommerce, Adobe Commerce, commercetools, Oracle NetSuite Commerce, Salesforce B2B Commerce, SAP Commerce Cloud, OroCommerce, Optimizely, Sana Commerce, Spryker, CS-Cart, PrestaShop, Elastic Path and NuORDER. The list mixes commerce platforms with marketplace-capable products. Its total-cost-of-ownership comparisons come from a study Shopify commissioned, so treat them as vendor-sponsored. Appearing in that list does not mean a product runs multi-seller marketplaces out of the box.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
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