B2B eCommerce platforms need to support business purchasing workflows that are fundamentally different from consumer buying. A consumer adds a product to a cart and pays with a credit card. A B2B buyer requests a quote for 500 units at a negotiated price, routes the purchase through a 3-level approval chain, pays on net-60 terms via ACH or wire transfer, and expects the order to integrate with their procurement system via EDI or cXML.
Shopify Plus and BigCommerce have added B2B features over the past 3 years. Shopify Plus launched B2B on Shopify in 2022, and BigCommerce has offered B2B Edition since 2020. Both handle basic B2B scenarios: company accounts, price lists, and payment terms. Both struggle with the complex scenarios that mid-market and enterprise B2B operations actually run: multi-warehouse inventory allocation, customer-specific catalog visibility, approval workflows with spending limits, and quote negotiation with revision history.
What are the core requirements for a B2B eCommerce platform?
Requirement | Shopify Plus B2B | BigCommerce B2B | Custom Platform |
|---|---|---|---|
Customer-specific pricing | Yes, via price lists (limited to volume-fixed pricing) | Yes, via price lists and customer groups | Full flexibility: tiered, volume, contract, margin-based, time-bound |
Approval workflows | Not native (requires third-party app) | Basic (single-level via B2B Edition) | Multi-level with spend limits, department routing, and escalation rules |
Quote management | Draft orders only (no revision history, no expiration) | Quote request with basic workflow | Full RFQ with negotiation, revision tracking, approval, and conversion to order |
Net payment terms | Yes (net 15, 30, 60, 90) | Yes (via invoice portal) | Custom terms per customer, early payment discounts, credit limit enforcement |
Catalog permissions | Yes (catalogs assigned to companies) | Yes (category-level restrictions) | SKU-level visibility per customer, location, or contract |
EDI/cXML/Punchout | Third-party apps only | Punchout supported natively, EDI via partners | Native EDI, cXML, Punchout built to customer specs |
Multi-warehouse inventory | Yes (locations), but no allocation rules | Yes (multi-storefront), basic allocation | Custom allocation by customer, region, priority, with backorder and split-ship logic |
Where does Shopify Plus B2B fall short?
Shopify Plus B2B pricing is limited to fixed price lists. A distributor who needs tiered pricing (1 to 99 units at $10, 100 to 499 at $8.50, 500+ at $7.25) with an additional customer-specific discount (Customer A gets 5% off all tiers) and a contract-based ceiling price (never above $9 regardless of quantity) cannot express this in Shopify's price list system. The operations team maintains a separate pricing spreadsheet and manually creates draft orders for complex quotes.
Shopify Plus has no native approval workflows. A buyer at a mid-market manufacturer needs their purchase over $5,000 approved by a department head and their purchase over $25,000 approved by a VP. Shopify does not support this. The buyer places an order, pays immediately, and the approval happens outside the platform via email. This is a compliance problem for companies with procurement policies.
Shopify Plus quote management is limited to draft orders. There is no revision history (the buyer requested $8.50, you countered at $8.75, they accepted at $8.60). There is no quote expiration. There is no way for a buyer to view, compare, and accept quotes through their account portal. The sales team manages the entire quote-to-order process through the Shopify admin, which was designed for D2C order management.
Where does BigCommerce B2B fall short?
BigCommerce B2B Edition handles more B2B scenarios than Shopify Plus out of the box. Quote management is functional, approval workflows exist at a basic level, and Punchout catalog support is native. The gaps appear at scale.
Complex organizational hierarchies are the first gap. A B2B buyer with multiple divisions, each with their own pricing, catalog access, and approval chains, cannot represent this structure in BigCommerce without heavy customization. The platform supports company accounts and customer groups, but not the parent-child organizational structures that enterprise buyers use.
ERP integration depth is the second gap. BigCommerce connects to ERPs via API, but the integration is typically one-directional for complex data: orders push to the ERP, but real-time inventory allocation, credit limit checks against accounts receivable, and dynamic pricing based on ERP contract data require custom middleware that BigCommerce's partner ecosystem does not standardize.
When does a custom B2B platform make sense?
A custom B2B eCommerce platform is the right choice when the business has pricing rules that cannot be expressed in a price list (dynamic pricing based on raw material costs, margin-based pricing, contract pricing with automatic annual escalators), when the approval and procurement workflows are complex enough that no off-the-shelf solution supports them without heavy customization, or when the ERP integration needs to be real-time and bi-directional (inventory reservation at order placement, credit limit enforcement at checkout, automatic pricing updates from ERP contract tables).
The decision is not about features. It is about whether the platform's data model can represent the business's commercial relationships. If the answer is "we need to maintain a separate system for pricing, approvals, or inventory because the platform cannot handle our rules," then the platform is creating operational overhead instead of eliminating it.
Madgeek has built custom B2B eCommerce platforms for distributors and wholesalers where the catalog structure, pricing logic, and order workflow exceeded what Shopify Plus and BigCommerce could support. In one B2B platform rebuild, the custom system replaced a combination of Shopify Plus (for the storefront), Excel (for pricing), and email (for approvals) with a single platform that handles the complete quote-to-order-to-fulfillment cycle, resulting in a 40%+ increase in wholesale order volume within the first year.
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