BigCommerce ERP integration: choosing the right connector.

A BigCommerce ERP integration keeps six kinds of data in step:

• Catalog: products, SKUs, variants and units of measure, from the ERP item master.
• Prices: list and customer-specific prices, resolved into BigCommerce price lists.
• Stock: ideally available-to-promise by warehouse, not total on hand.
• Customers: accounts, ship-to addresses and buyers, in both directions.
• Orders: into the ERP as sales orders, with status and tracking coming back.
• Invoices: open items and history, shown in the buyer's account.

One fact shapes the rest: BigCommerce syncs rather than reads the ERP live. It stores its own catalog and price lists, so every integration is a copy kept fresh. The engineering is in how fresh, how correct, and what happens when the copy and the ERP disagree.

There are three ways to build it, plus a hybrid of them:

• Packaged connector or marketplace app. Fastest when your ERP, pricing and entities fit its model.
• iPaaS (integration platform as a service). A platform with templates, for teams connecting several systems.
• Custom code. For calculated pricing, live checks at the cart, or an ERP nobody has packaged.
• Hybrid. A connector or iPaaS for routine flows, custom code for the hard one, usually pricing.

The architecture argument behind this is in real-time vs middleware ERP integration, and when a platform that reads the ERP live fits better is in Sana Commerce vs BigCommerce.

Each ERP exposes its data differently, so the integration changes even when the BigCommerce side stays the same. The connector column lists only products whose own listing or documentation names that ERP for BigCommerce. A name there means the product exists, not that we recommend it.

Connector coverage changes, so confirm the current version and edition support with the vendor before you plan around one.

Running Epicor and selling mostly to other businesses? Sana Commerce has no Epicor connector, and our Sana Commerce and Epicor page covers the alternatives. We build the integration, not the ERP: if you need the ERP itself implemented or upgraded, our ERP partner directory lists firms by ERP. Product names are explained in our glossary.

Every BigCommerce ERP integration is one of these four, and none is right by default. Prices are left out because they depend on the vendor, your volumes and your edition.

A decision rule we actually use

1. Test the hard cases first: the three customers whose prices are hardest to explain, a real order with your document type, and a customer on credit hold.
2. A packaged connector that names your ERP and version and passes all three: use it.
3. Passes everything except pricing: go hybrid, and build the pricing flow or a live cart price call yourself.
4. You already license an iPaaS, or more than two systems need the same ERP data: build on the iPaaS.
5. No connector names your ERP, or it sits behind a firewall nobody wants to open: plan custom code with an agent or queue on the ERP side.

Celigo, Jitterbit, APPSeCONNECT, Patchworks and iPaaS.com publish BigCommerce connectors or templates, each with different ERP coverage. Boomi and MuleSoft can call BigCommerce through generic HTTP connectors, but we found no prebuilt BigCommerce-to-ERP template from either.

An ERP integration is not one pipe. It is a set of flows, each with its own direction, trigger, latency target and failure behavior. Packaged connectors handle the common shape of each and break at the edges, where B2B businesses keep their margin. This is the contract we write down before any code.

Pricing breaks first

Many connector listings say only that they sync prices. Ask whether contract prices, quantity breaks and validity dates come through, or get flattened or dropped. When the ERP calculates price at order time, as SAP and Business Central do, a projected price list is right for most customers and wrong for the exceptions, and finance finds those weeks later. What holds up: synced price lists for browsing, the ERP asked for the cart price, cached per customer and surfaced through the GraphQL Storefront API with a customer impersonation token. One platform limit to design around: BigCommerce documents that the storefront price filter does not show when price lists are in use.

Then orders

Duplicates appear when a retry posts the same order twice because nothing carries an idempotency key. Wrong document types and warehouses appear when a connector maps one generic order shape. Every order needs an idempotency key, a durable queue, and the real ERP document number returned to the buyer.

Then everything that assumes the ERP is up

• Stock. A synced on-hand quantity is not enough. Buyers need what can ship to them, plus a soft reserve at add to cart for when sync lags.
• Credit. Few connector listings mention a live credit check at checkout. On-account orders need the limit, balance and holds at the moment of order. The storefront makes no financial writes, and the ERP stays the system of record for receivables.
• Outages. The store serves its last good synced state, orders queue and post when the ERP returns, and circuit breakers stop a slow ERP from becoming a slow store.
• Observability. Correlation IDs from storefront to ERP, lag per flow, and a reconciliation report that flags drift before buyers do.

Underneath, the patterns repeat on every ERP: events for stock, orders and credit, batch for the catalog, a durable queue instead of direct calls, and per-buyer pricing kept out of edge caches. Custom services, where needed, are .NET.

B2B Edition adds companies with buyers inside them, company price lists, quotes, shopping lists, payment terms and an invoice portal. None of it knows about your ERP, so each feature needs a matching ERP record and a flow. Our B2B Edition deep dive covers the features themselves.

Connector support for B2B Edition varies. Some vendors describe company, contact or price list sync for it in a marketplace listing or their own docs, among them CSM for Business Central, Folio3's NetSuite connector, IN-SYNCH for Sage 100, Strabo Partners for Finance and Operations, and iPaaS.com. Many never mention it, and those that do differ on direction: Acumatica's 2026 R1 company sync is a one-way import into Acumatica. Ask every vendor which B2B Edition objects they sync, in which direction, and how roles are handled.

Most projects take about three months including planning, and run longer when several vendors are involved or their people are part-time on the project. Each party, from the ERP partner to your own IT team, keeps its own calendar, and the slowest one sets the pace.

1. Discovery, 4 to 6 weeks. Every flow is mapped, with the real data that will test it: your hardest pricing customers, odd units of measure, multi-warehouse items. Any connector that names your ERP is tested against those cases here, before a licence is signed.
2. Design, 2 to 5 weeks. Mappings, the pricing approach, error handling and monitoring, agreed with your ERP partner.
3. Build, 4 to 20 weeks. The widest range. Configuring a connector sits at the short end, a custom pricing service against an on-premises ERP at the long end.
4. Ship, 1 to 3 weeks. A parallel run on real data, with orders, prices and stock reconciled line by line, then cutover with a rollback plan and the ERP partner available.

After go-live comes a period of close monitoring and quick fixes, then normal support. Changing storefront platforms at the same time adds migration work on customer data, order history and SEO, covered in our B2B replatforming guide.

The same ERP can produce a small project or a large one, so any figure given before the flows are mapped is a guess. These are what move it:

• The route. A connector licence, an iPaaS subscription, or build hours. Connector and iPaaS costs recur. Custom code costs mostly up front, plus hosting and support.
• The number of flows. Catalog and orders alone is smaller than catalog, pricing, stock, customers, orders, invoices and credit.
• Pricing complexity. Flat price lists sync cheaply. Calculated pricing needs careful flattening or a live price service, and is usually the largest single item.
• An on-premises ERP. It needs a secure way in, such as an agent, a relay or a VPN, and time from whoever owns the firewall.
• ERP-side work. Custom API pages, published web services or integration user licences, usually delivered by your ERP partner.
• The number of vendors, and their availability. Each vendor is another calendar. Part-time vendor teams stretch the timeline, and a longer timeline costs more.
• Running it. Monitoring, reconciliation and support after launch. Budget for the integration you will operate, not only the one you build.