How to Build a B2B Marketplace: Platform Comparison & Complete Guide (2026)
The short answer: A B2B marketplace is fundamentally different from a B2C marketplace or a B2B portal. It requires mechanics that do not exist in standard ecommerce: RFQ flows, contract pricing, buyer approval workflows, net payment terms, punchout catalogue integration, and multi-organisational account management. The platform comparison section of this guide covers five options — Mirakl, OroCommerce, Virto Commerce, Marketplacer, and Shopify Plus with apps — with costs, timelines, and when each fits. Start here if you are a B2B founder deciding whether to build, and on what.
The B2B marketplace category has exploded. From 75 industry-specific B2B marketplaces five years ago, the number has grown to over 750 today — with projections of 1,000 by end of 2026 (Shopify, Swell April 2026). The global B2B ecommerce market reached approximately $32 trillion in 2025. And 73% of B2B buyers are now willing to place orders over $50,000 through digital self-service channels — a figure that would have been unthinkable a decade ago (McKinsey B2B Pulse, 2025).
For B2B founders, this creates both an opportunity and a decision: building a marketplace is no longer just for Amazon-scale operations. Mid-market manufacturers, distributors, and industry associations are all building private B2B marketplaces. But the mechanics of a real B2B marketplace are significantly more complex than a standard ecommerce store, and choosing the wrong platform or underestimating the build complexity is an expensive mistake.
This guide covers what a B2B marketplace actually requires (not a simplified list, but the mechanics that determine whether buyers actually use it), how to choose a platform, what it costs to build, and a six-phase process for getting from decision to launch.
B2B Marketplace vs B2B Portal: The Distinction That Matters
Before choosing a platform or estimating a build cost, founders need to be clear on what they are actually building — because the two most commonly confused concepts have very different operational requirements and cost profiles.
A B2B portal (also called a buyer portal or self-service portal) is a digital commerce platform where a single supplier sells to multiple buyers. One seller, many buyers. The supplier controls the catalogue, pricing, and fulfilment. Complexity comes from the buyer side: company accounts, custom pricing, approval workflows, and ERP integration. Most B2B ecommerce platforms — Shopify Plus, Adobe Commerce's B2B module, OroCommerce in portal mode — handle this well.
A B2B marketplace is a multi-vendor platform where multiple suppliers sell to multiple buyers. Many sellers, many buyers. The marketplace operator facilitates transactions between them. Complexity comes from both sides simultaneously: you need everything a portal needs (company accounts, custom pricing, approval workflows) plus seller onboarding, commission management, payment splitting between platform and sellers, seller performance monitoring, dispute resolution, and tax remittance across multiple selling entities.
Most B2B founders asking "how do I build a B2B marketplace?" actually need a B2B portal — and that distinction saves six months of development time and $200,000 or more in build cost. Before proceeding with this guide, answer one question: does your business model require multiple sellers transacting through a single platform, or are you a single supplier wanting to sell digitally to multiple buyers? If the latter, the portal is the right build and the platform comparison below looks very different.
The B2B Mechanics That Make or Break Marketplace Adoption
B2B buyers will not use a marketplace that forces them to behave like B2C consumers. The mechanics below are not optional features — they are the operational requirements that determine whether procurement teams at buyer organisations will actually use your marketplace, or whether they will continue calling a sales rep.
RFQ (Request for Quotation) flows
The purchase cycle for complex or high-value B2B items often begins not with "add to cart" but with a quotation request. A buyer submits a specification and quantity requirement; sellers respond with a price proposal; the buyer may counter or request modifications; a final agreed quote is accepted and converts to an order. This multi-round, structured negotiation process is native to B2B procurement and foreign to most ecommerce platforms.
An RFQ system requires: a structured quote request form (with line items, delivery requirements, and specification attachments); seller-side quote management (viewing requests, submitting proposals, tracking responses); buyer-side comparison (comparing multiple seller quotes side by side); negotiation threads; quote approval routing; and automated conversion of an accepted quote to a purchase order. Missing any of these steps means buyers will leave the platform to complete the negotiation by email or phone.
Contract pricing and shared catalogues
B2B pricing is fundamentally not list-price pricing. Buyers expect — and have often negotiated — prices specific to their account, based on volume commitments, relationship history, or standing contract terms. A marketplace that shows the same price to all buyers will either undercharge buyers who have negotiated better terms, or be rejected by procurement teams whose ERP systems will not match the platform price to the contracted price.
Contract pricing means: each buyer account sees prices that reflect their specific contract; prices can vary by product, quantity tier, or delivery window; and price updates on contract renewal apply automatically without manual per-account adjustment. Shared catalogues extend this further: different buyer companies may see different product ranges as well as different prices — a distributor sees the full catalogue while a reseller sees only the products they are authorised to sell.
Buyer approval workflows
Almost no B2B organisation allows all employees to place orders of any value without internal approval. A purchase order for $5,000 may go through automatically; one for $50,000 may require a department head sign-off; one for $500,000 may require finance approval and a board member sign-off. The marketplace needs to mirror your buyers' internal procurement rules — otherwise buyers will complete purchases offline where their approval process already exists.
Approval workflow requirements: configurable approval thresholds by order value; approval routing to the correct role within the buyer's company account; notification of approvers; timer-based escalation; audit trail of approvals; and the ability for buyers to configure their own approval rules within their company account (because every buyer organisation's approval structure is different).
Net payment terms
B2B commerce typically does not settle at checkout. Payment on delivery or net 30 (payment due 30 days after invoice), net 60, or net 90 terms are standard in most industries — and the inability to offer them is a deal-breaker for procurement-managed buyers. A marketplace that requires credit card payment at checkout cannot serve buyers whose payment process involves invoice approval, accounts payable workflow, and batch payment runs.
Net terms on a marketplace are operationally complex: the marketplace collects payment from the buyer (potentially on 30-60 day terms, meaning the marketplace may be extending credit), pays out to sellers (on what schedule, and with what float management?), and handles late payment, credit risk assessment, and bad debt. Specialist fintech integrations (TreviPay, Resolve, or BlueSnap) or in-house credit facilities handle this complexity — it is not a feature your engineering team should build from scratch.
Punchout catalogue integration
Large buying organisations — particularly in manufacturing, government, and healthcare — manage procurement through dedicated procurement software: SAP Ariba, Coupa, Oracle Fusion Procurement, Jaggaer. These systems need to "punch out" to your marketplace catalogue, allow buyers to build a shopping cart in your catalogue, and return that cart to the procurement system as a purchase requisition — without the buyer ever re-entering product data manually.
Punchout requires: CXML (Commerce XML) protocol support on the marketplace side; authenticated session management with the buyer's procurement system; seamless cart transfer back to the procurement system with line-item data (SKU, price, UOM, supplier ID); and testing with each procurement system your buyers use. Without punchout, enterprise buyers with Ariba or Coupa mandates simply cannot use your marketplace for approved purchases — a disqualifying limitation for some B2B verticals.
Bulk ordering and minimum order quantities
B2B orders operate at volumes that strain standard ecommerce infrastructure. A single order may contain 500 line items. A buyer may need to submit standing orders (the same order on a recurring schedule). Minimum order quantities (MOQs) and minimum order values (MOVs) are standard commercial constraints. Quantity breaks — the price per unit drops at 100 units, drops again at 1,000 units — need to be reflected in real time as buyers adjust quantities.
The technical requirement: a product page and cart that handles large line-item counts without performance degradation; real-time quantity-break pricing calculation; MOQ and MOV enforcement with clear messaging; CSV upload for bulk order entry (common in industrial procurement); and standing/scheduled order management for recurring purchases.
B2B Marketplace Platform Comparison
The following comparison covers the five most relevant platform options for a B2B founder in 2026. Each platform is evaluated against the B2B mechanics described above, plus deployment model, cost, and typical use case fit. All platform information is from publicly available vendor documentation and third-party analyses from 2026.
Sourcing note: Platform pricing in this category is almost never publicly disclosed and depends heavily on negotiation, contract length, and GMV. Figures cited are from third-party analyst estimates (Origami Marketplace Feb 2026, Virto Commerce, agency analyses) and should be treated as directional benchmarks rather than exact quotes. Request formal pricing from each vendor for your specific scenario.
| Platform | Model | RFQ / Quotes | Contract pricing | Approval workflows | Net terms | Punchout | Multi-vendor native | Year-1 cost estimate | Implementation time |
|---|---|---|---|---|---|---|---|---|---|
| Mirakl | SaaS (pure marketplace layer — requires separate ecommerce storefront) | Yes (native) | Yes | Yes | Via fintech integration | Yes (CXML, EDI) | Core purpose | $250K–$1M+ | 6–18 months |
| OroCommerce | Open-source / cloud (B2B-native ecommerce + marketplace) | Yes (native, best-in-class) | Yes (native) | Yes (multi-tier native) | Yes (native payment terms) | Yes (CXML native) | Via OroMarketplace extension | $150K–$500K | 4–9 months |
| Virto Commerce | Open-source / cloud PaaS (composable, B2B-designed) | Yes (configurable) | Yes (contract pricing native) | Yes (multi-tier) | Via integration | Via integration | Yes (native marketplace module) | $150K–$600K | 4–12 months |
| Marketplacer | SaaS marketplace layer (integrates with existing ecommerce platform) | Limited | Via integrations | Limited | Not native | Not native | Core purpose | $50K–$200K | 3–6 months |
| Shopify Plus + apps | SaaS ecommerce (marketplace via third-party apps) | Via Draft Orders or apps | Via B2B price lists (native) | Limited native; apps extend | Payment terms native (net 30/60/90) | Not available | Via Carro, Shipturtle, Marketplacer | $50K–$200K | 2–6 months |
| Adobe Commerce | Open-source PHP / PaaS / SaaS (ACCS) | Yes (native B2B module) | Yes (native shared catalogues) | Yes (native purchase approval) | Via payment gateway integration | Via extension | Via third-party modules | $200K–$600K | 5–12 months |
Platform profiles: who each fits
Mirakl — the enterprise marketplace standard
Mirakl is the market reference for enterprise B2B and B2C marketplace management. Founded in France in 2012, it serves 450+ enterprise clients including Carrefour, Best Buy Canada, Leroy Merlin, Toyota Material Handling, Airbus Helicopters, and Sonepar. Its core capability is enabling established organisations to add third-party sellers to their existing ecommerce infrastructure — it is a pure marketplace layer, not an ecommerce platform. You must integrate Mirakl with a separate storefront (Adobe Commerce, Shopify Plus, Salesforce Commerce Cloud, or a custom frontend).
Mirakl's strengths: seller onboarding automation, centralised catalogue aggregation, commission and payout management, AI-powered product matching, EDI and CXML punchout support, and deep integration with enterprise ERP systems. Its limitations in a B2B context: its architecture is retail-first. Advanced B2B requirements like contract pricing or multi-organisational accounts often require additional configuration that the out-of-box product does not handle cleanly. Year-one implementation cost frequently exceeds $250,000 and can reach $1M+ for complex builds; implementation typically takes 6–18 months (Origami Marketplace, Feb 2026).
Choose Mirakl if: You are a large enterprise with significant existing traffic and want to add third-party sellers. Your compliance, audit, and regulatory requirements need an enterprise-grade SaaS platform with SOC 2 certification and an extensive partner ecosystem. You have the budget and timeline for a long implementation.
OroCommerce — purpose-built open-source B2B
OroCommerce is the most B2B-native platform on this list. Unlike Mirakl (adapted from a retail-first architecture) or Shopify Plus (a B2C platform with B2B features added), OroCommerce was built from the ground up for B2B commerce — its data model, permission system, and workflow engine all assume B2B complexity as the baseline. It has the strongest native RFQ functionality, the most complete multi-tier approval workflow system, and native CXML punchout support. Its OroMarketplace extension adds multi-vendor capability on top of the B2B portal foundation.
OroCommerce is open-source (community edition) and cloud/enterprise (paid editions). It integrates with the OroCRM system, giving an unusually tight commerce + CRM data model for B2B organisations where the same accounts appear in both sales and ecommerce contexts. Year-one build costs typically run $150,000–$500,000 depending on ERP integration complexity; implementation takes 4–9 months for standard builds.
Choose OroCommerce if: B2B is your primary or only sales model, your procurement requirements are complex (multi-tier approvals, sophisticated RFQ flows, punchout), and you want a platform where these capabilities are native rather than configured. You have developer capacity for an open-source platform or can engage an OroCommerce agency.
Virto Commerce — composable B2B for enterprise ERP environments
Virto Commerce is a composable commerce platform designed specifically for B2B environments where ERP, CRM, and PIM systems drive the core business logic. Unlike monolithic platforms, Virto's modular architecture allows businesses to add or replace individual components without rebuilding the whole stack. Its client list includes HEINEKEN (B2B route-to-market in 25 countries), Cadillac & KW Parts (headless platform for 4M items), and Bosch Termotechnik — large-scale, complex B2B implementations with deep ERP integration.
Virto Commerce supports contract pricing, multi-tiered approval workflows, bulk ordering, and a native marketplace module. Its strength over Mirakl is a unified ecommerce + marketplace architecture (no separate storefront required) and deeper ERP integration depth. Its limitation versus OroCommerce is that native punchout and RFQ are less mature and often require additional configuration or custom development.
Choose Virto Commerce if: You are building for complex enterprise B2B with deep ERP integration requirements, your organisation already uses composable/MACH architecture principles, or your business model spans ecommerce + marketplace with tight ERP data dependencies.
Marketplacer — fastest path for mid-market multi-vendor
Marketplacer is a SaaS marketplace platform that layers multi-vendor functionality on top of an existing ecommerce storefront (Shopify Plus, BigCommerce, Adobe Commerce, Salesforce Commerce Cloud). It is explicitly not a full ecommerce solution — it adds seller onboarding, catalogue aggregation, commission management, and order routing to a platform you already operate. Cogent2's comparison (2026) characterises it as particularly suited for brands using API-first SaaS platforms wanting to expand product range without heavy inventory investment.
Marketplacer's B2B functionality is limited relative to Mirakl, OroCommerce, or Virto: RFQ flows, approval workflows, and punchout are not native. For complex B2B procurement requirements, it falls short. For a mid-market brand that primarily needs to add third-party sellers to an existing Shopify Plus or BigCommerce store — dropshipping, extended range, curated third-party suppliers — Marketplacer is the fastest and most cost-effective path, with implementations running 3–6 months and year-one costs of $50,000–$200,000.
Choose Marketplacer if: You already operate on Shopify Plus, BigCommerce, or Adobe Commerce and want to add third-party sellers or enable dropshipping with a managed SaaS layer. Your B2B requirements are limited (no punchout, no complex RFQ). Speed-to-market matters more than B2B procurement depth.
Shopify Plus with apps — for B2B brands extending into marketplace
Shopify Plus is not a marketplace platform — it is a B2B ecommerce platform that can be extended into marketplace territory via apps. Shopify's native B2B capabilities (company accounts, custom price lists, payment terms including net 30/60/90, minimum order quantities) are genuinely strong for portal-style B2B. Multi-vendor marketplace functionality requires third-party apps: Carro (collaborative commerce and dropshipping), Shipturtle (multi-vendor for shipping-heavy categories), Marketplacer (for the full marketplace management layer), or Webkul/Shipturtle for more customised builds.
The absence of native punchout is the hard limit: Shopify Plus does not support CXML punchout, which means buyers using SAP Ariba, Coupa, or Oracle procurement software cannot use it for approved procurement. For any B2B marketplace targeting enterprise buyers with procurement system mandates, this is disqualifying.
Choose Shopify Plus + apps if: Your B2B buyers are SMB or mid-market without procurement system mandates. You are starting with a portal and exploring marketplace as a future capability. Speed, cost, and developer availability are more important than B2B procurement depth. You do not need punchout or complex RFQ flows in the near term.
The Six-Phase Build Process
Regardless of platform choice, B2B marketplace builds follow a similar phase structure. The phases below reflect the operational reality of a mid-market B2B marketplace build — not an optimistic vendor timeline.
Discovery and requirements mapping (4–8 weeks)
Document every buyer workflow, seller onboarding step, pricing model, and integration dependency before any platform is chosen or any code is written. The most expensive B2B marketplace projects fail because requirements surface during build. Discovery must produce: a buyer journey map (how a buyer discovers, requests a quote, gets approval, places an order, and pays); a seller journey map (how a seller is onboarded, lists products, receives orders, fulfils, and gets paid); a pricing model definition (contract pricing logic, volume tiers, shared catalogues); an integration map (ERP, PIM, payment gateway, logistics, tax); and a data ownership document (which system owns product data, inventory, pricing, and orders).
Platform selection and architecture (2–4 weeks)
Use the comparison table and decision framework above to narrow to two platforms. Run both through a structured RFP: provide your requirements document, request a demo of the specific B2B mechanics that matter to your use case (not a generic demo), ask for references from comparable B2B marketplace implementations, and get formal pricing for your specific profile. Do not select a platform based on a demo alone — select based on references from production B2B deployments at your scale.
Core build (12–20 weeks for standard; 20–40 weeks for enterprise)
The build should be sequenced to deliver a minimum viable marketplace (MVM) before the full feature set. Phase 3a: catalogue, seller onboarding, and basic checkout. Phase 3b: RFQ flows, approval workflows, and contract pricing. Phase 3c: net terms, punchout integration (if required), and advanced reporting. Building everything simultaneously is the most common source of timeline overrun — the MVM approach gets buyers and sellers on the platform earlier and generates real usage data that shapes the later build phases.
Integration (concurrent with build; 8–16 weeks for ERP)
ERP integration is the highest-risk project component and should begin in parallel with the platform build, not after it. ERP integration requires: system ownership decisions (which system owns product data, pricing, inventory, orders?); API or EDI connection to the ERP; data transformation mapping; error handling and retry logic; and a testing protocol against real data. Custom SAP or Oracle integrations add $50,000–$250,000 and 3–6 months to any build timeline. Pre-built connectors (e.g. Celigo, Boomi, MuleSoft with marketplace templates) reduce cost to $20,000–$50,000 and timeline to 4–8 weeks for compatible ERP configurations.
Seller onboarding and soft launch (4–6 weeks)
B2B marketplaces fail more often due to seller-side friction than buyer-side. If sellers struggle to list products, manage orders, or receive payments, they disengage — and a marketplace without sellers has nothing to offer buyers. Soft launch with 3–5 pilot sellers before any public launch. Identify and resolve onboarding friction points with real sellers before scaling. Establish seller support SLAs and onboarding documentation. Commission rates, payout schedules, and dispute handling policies must be documented and communicated to sellers before they go live.
Launch, hypercare, and iteration (4–8 weeks post-launch)
Define rollback criteria before go-live (what level of order failure rate, payment error rate, or seller complaint rate triggers a rollback to the previous system?). Allocate dedicated hypercare resource for the first four weeks — typically the highest-touch period. Establish a structured feedback loop from both buyers and sellers into the product backlog. The first three months of a B2B marketplace's life generate more useful product requirements than the six months of discovery that preceded it.
What It Costs to Build a B2B Marketplace in 2026
Shopify Plus + Marketplace App
Platform fee: $2,300/month
App cost (Marketplacer/Carro): $500–$2,000/month
Build (theme, configuration, light custom): $30,000–$80,000
ERP integration (pre-built connector): $20,000–$50,000
Seller onboarding tooling: $10,000–$20,000
Year 1: ~$90,000–$200,000OroCommerce or Virto Commerce
Platform licence/hosting: $15,000–$60,000/year
Build (configuration + custom modules): $80,000–$200,000
ERP integration (medium complexity): $50,000–$150,000
Seller onboarding + UAT: $20,000–$40,000
Punchout integration (if required): $20,000–$50,000
Year 1: ~$200,000–$500,000Mirakl Enterprise
Mirakl platform licence: GMV-based, often $80,000–$200,000+/year
Separate ecommerce storefront: $80,000–$200,000+
Mirakl integration services: $60,000–$150,000
ERP integration (enterprise): $50,000–$250,000
Seller onboarding programme: $30,000–$80,000
Year 1: ~$300,000–$1,000,000+Marketplacer (mid-market)
Marketplacer SaaS: $20,000–$60,000/year
Existing ecommerce platform assumed
Integration and configuration: $20,000–$60,000
Seller onboarding tooling: $10,000–$20,000
Light custom development: $10,000–$30,000
Year 1: ~$60,000–$170,000The ERP caveat: Custom ERP integration is the primary cost variable in every row above. If your ERP is SAP S/4HANA, Oracle Fusion, or a proprietary legacy system without a standard API, the integration cost can add $150,000–$250,000 to any build and 3–6 months to any timeline — regardless of platform choice. Establish ERP integration requirements and obtain preliminary estimates from your ERP vendor or integration partner before finalising platform or build budget.
AI in B2B Marketplaces: What's Real in 2026
AI is genuinely changing B2B marketplace operations in 2026, particularly in three areas where the ROI is measurable and the implementation is mature enough to be production-ready.
AI-powered catalogue matching and enrichment
Multi-vendor B2B marketplaces aggregate product data from dozens or hundreds of sellers — each with their own naming conventions, attribute structures, and data quality levels. Manually normalising this data into a consistent catalogue taxonomy is one of the most labour-intensive operations in marketplace management. Large language models can enrich, normalise, and categorise seller-submitted product data at scale, reducing what previously took weeks of manual cataloguing to hours. Mirakl's platform includes AI-powered product matching; platforms like OroCommerce and Virto Commerce integrate with external AI catalogue enrichment services.
Intelligent pricing and demand forecasting
B2B pricing negotiation — the back-and-forth of the RFQ process — is increasingly being accelerated by AI-assisted quote generation. Rather than a human pricing manager reviewing each RFQ and composing a response, an AI layer pre-generates a proposed quote based on the buyer's account history, contract terms, current inventory position, and comparable recent orders. The human approves, adjusts, or declines. For marketplaces handling hundreds of RFQs per week, this accelerates quote turnaround time from days to hours — a significant buyer experience improvement that increases adoption.
Agentic procurement and buyer agents
Forrester's 2026 predictions flag a specific emerging dynamic: AI buyer agents that negotiate price and terms with seller-side AI agents, without human involvement for routine procurement. Gartner projects that AI agents will manage 30% of B2B procurement by 2028. For marketplace builders, this has a concrete implication: ensure your platform's API layer is clean, documented, and accessible — because the next generation of marketplace interactions may not involve a human buyer at the keyboard at all.
Decision Framework: Should You Build a Marketplace?
Before selecting a platform or engaging a development partner, answer these four questions honestly. If any answer is "no," the marketplace build decision needs more foundation work before it is ready for platform selection.
Do you have a clear monetisation model? B2B marketplaces monetise through commission (percentage of GMV), subscription fees from sellers, transaction fees, premium listing fees, or some combination. If the answer to "how do you make money?" is still unclear, the platform decision is premature.
Do you have committed supply (sellers) before building demand (buyers)? The most common B2B marketplace failure is launching without a critical mass of sellers, resulting in a buyer-facing catalogue too thin to serve real procurement needs. Before writing code, commit 5–10 launch sellers who have agreed to provide a minimum catalogue and fulfil orders at your marketplace's terms.
Do you control a buyer relationship that creates demand? B2B marketplaces that succeed typically have a founding advantage on the demand side — an association with member companies, an industry media brand with an existing buyer audience, or a distributor with an existing buyer base. A marketplace launched without buyer relationships into a competitive market with established competitors rarely reaches the liquidity threshold where buyers and sellers both find sufficient value.
Can you fund the operational costs beyond the build? A B2B marketplace requires ongoing resources that pure B2C ecommerce does not: seller relationship management, dispute resolution, catalogue quality assurance, commission and payout processing, and the ongoing work of maintaining a two-sided marketplace. Year-two operational costs (excluding platform and hosting) typically run $200,000–$500,000 for a mid-market marketplace with 20–50 active sellers. Model this before committing to a build.
If your answers are yes to all four, our marketplace solutions practice and industry B2B directory work covers the full build from architecture through launch. We have built and integrated B2B marketplaces across ecommerce, events, and industrial verticals.
Limitations of This Article
- Platform pricing in B2B marketplace software is not publicly disclosed by most vendors and varies significantly by GMV, contract length, and negotiation. All cost figures are from third-party analyst estimates (2026) and should be validated with each vendor directly.
- The B2B ecommerce market size figure ($32T) varies across sources using different methodologies. ITA (International Trade Administration) and Statista figures are the most commonly cited. The $32.11T figure from ITA via Shopify is used as the primary citation.
- The 750+ marketplace count and "65% of B2B ecommerce through marketplace channels" are from Swell (April 2026). Swell is a headless commerce platform with a commercial interest in marketplace adoption. The marketplace count is corroborated by Shopify's own blog; the 65% share figure is not independently corroborated and should be treated as directional only.
- Mirakl's limitations in complex B2B contexts are noted based on competitor-source analyses (Origami Marketplace, Virto Commerce). Verify directly against Mirakl's current product capabilities at mirakl.com.
- Shopify Plus punchout absence: Shopify does not natively support CXML punchout as of mid-2026. Verify current capabilities at help.shopify.com before using this as a disqualifying criterion in an active evaluation.
Building a B2B marketplace and want experienced guidance on the build?
MercuryMinds has built and integrated B2B marketplaces and directories for ecommerce, events, and industrial clients across 17+ years. We advise on platform selection, architecture, seller onboarding, and ERP integration — and we build the implementations that follow.
Talk to the TeamFrequently Asked Questions
How do you build a B2B marketplace?
Building a B2B marketplace involves six phases: discovery and requirements mapping (define buyer workflow, seller onboarding, pricing model, and integration dependencies); platform selection (choosing between a purpose-built marketplace platform like Mirakl or OroCommerce, a composable solution like Virto Commerce, or extending an existing ecommerce platform like Shopify Plus or Adobe Commerce with marketplace apps); technical build (core features: catalogue management, RFQ flows, bulk and contract pricing, buyer approval workflows, net terms, seller onboarding and commission management); integration (ERP, PIM, payment gateway, logistics, tax); testing and seller onboarding; and launch with hypercare. Timeline typically runs 4 to 18 months depending on complexity and platform. Budget ranges from $50,000 for a Shopify Plus plus apps approach to $500,000 or more for an enterprise Mirakl or custom build.
What features does a B2B marketplace need?
A B2B marketplace requires seven categories of functionality that B2C marketplaces typically do not: (1) company account management with role-based permissions for buyer organisations; (2) RFQ workflows — buyers submit a quote request, sellers respond, negotiation happens in-platform, and an approved quote converts to an order; (3) contract pricing and shared catalogues — different buyers see different prices based on their account, negotiated contract, or customer group; (4) buyer approval workflows — purchase orders above a defined amount require manager or procurement approval before submission; (5) net payment terms — buyers pay 30, 60, or 90 days after delivery rather than at checkout; (6) bulk ordering with tiered pricing and minimum order quantities; and (7) punchout catalogue integration for buyers whose procurement systems (SAP Ariba, Coupa, Oracle) need to connect directly to the marketplace catalogue.
What is the best platform for building a B2B marketplace?
The best platform depends on scale, complexity, and existing infrastructure. Mirakl is the enterprise standard for large retailers and distributors wanting to add third-party sellers (450+ enterprise clients, deep punchout and EDI support) but requires a separate ecommerce storefront and has high implementation costs (often $250,000 or more in year one). OroCommerce is the strongest purpose-built open-source B2B marketplace and ecommerce platform. Virto Commerce suits enterprise B2B with complex ERP integration requirements. Marketplacer suits mid-market brands adding third-party sellers to an existing Shopify Plus or BigCommerce store. Shopify Plus with apps is the fastest and most cost-effective starting point for B2B brands with simpler multi-vendor needs but no punchout requirement.
How much does it cost to build a B2B marketplace?
Building a B2B marketplace costs between $50,000 and $1 million or more depending on platform and complexity. A Shopify Plus store extended with marketplace apps for a mid-market B2B brand: $90,000 to $200,000 in year one. An OroCommerce or Virto Commerce open-source marketplace: $200,000 to $500,000 in year one. A Mirakl enterprise implementation: $300,000 to $1 million or more in year one. The primary cost driver in all cases is ERP integration — connecting the marketplace to SAP, Oracle, Microsoft Dynamics, or a proprietary ERP adds $50,000 to $250,000 regardless of platform.
What is the difference between a B2B marketplace and a B2B portal?
A B2B portal is a digital commerce platform where a single supplier sells to multiple buyers. A B2B marketplace is a multi-vendor platform where multiple suppliers sell to multiple buyers — the marketplace operator manages the platform, onboards sellers, handles commission and payments, and facilitates transactions between sellers and buyers. The operational complexity is significantly higher for a marketplace: you need seller onboarding workflows, commission management, payment splitting, seller performance monitoring, and dispute resolution processes that a single-supplier portal does not require. Most B2B brands start with a portal and graduate to a marketplace when the business model justifies the additional complexity.