Sage 100 vs Sage Intacct: What Changes When You Sell B2B on Shopify

The meeting usually goes like this. The controller wants to move off Sage 100 because closing four companies in spreadsheets is eating the first week of every month. The ecommerce manager wants a Shopify B2B store live before the spring buying season. Someone asks the question that stalls both projects: do we switch ERPs first?

Most Sage 100 vs Sage Intacct comparisons (or Sage Intacct vs Sage 100, depending on who is selling) are written by resellers making the case for a migration. They cover the general ledger, reporting, and the cloud. They rarely cover what a distributor or manufacturer selling online needs to know. Which system holds orders, inventory, and pricing? How does each one talk to a storefront? What does that do to your Shopify build? That is this post.

Quick answer: Sage 100 is an ERP you install on a Windows server you run (or pay someone to host), and Sage positions it for US-based, single-entity businesses. Sage Intacct is a true cloud product with native multi-entity management. Both have order entry, inventory, and customer-specific pricing, so either can sit behind a Shopify B2B storefront. The difference is integration. Sage 100 exposes the COM-based Business Objects Interface, which needs a component running near your Sage server. Intacct exposes XML and REST web services that are metered and concurrency-limited per tenant. Choose the ERP on entity structure, warehouse complexity, and finance needs, then design the integration around the one you chose.

Sage 100 vs Sage Intacct at a glance

• Deployment: Sage 100 is installed and run on a Windows server, on your premises or with a hosting provider. Sage Intacct is a cloud service with automatic updates and no server to maintain.
• Who Sage built it for: Sage describes Sage 100 as best suited to US-based, single-entity businesses. Intacct lists multi-entity consolidation among its core capabilities.
• Order entry: Both create sales orders and invoices. Sage 100 uses its Sales Order module; Intacct uses Order Entry, which also handles quotes, shippers, credit memos, and returns.
• Inventory: Both track multiple warehouses and costing methods. Sage 100 adds Production Management for building to order. Intacct's Inventory Control includes a receive, pick, pack, and ship fulfillment flow.
• Pricing: Sage 100 resolves price through a fixed six-level hierarchy. Intacct uses price lists and price schedules with an order of precedence.
• Integration surface: Sage 100 offers the Business Objects Interface (COM), eBusiness Web Services (SOAP, narrow scope), and Visual Integrator (batch import). Intacct offers the XML Web Services API and a REST API that reached general availability in 2025.
• What that means for Shopify: On Sage 100, the integration needs a Windows-side component you host. On Intacct, it needs a sync design that respects API metering and concurrency limits.

Deployment: a server you run vs a tenant you rent

Sage 100 is installed software. Sage's installation guide is explicit that Setup runs on the Windows server, and for the Premium edition Microsoft SQL Server has to be installed before Sage 100 itself. Whether that server sits in your back office or with a hosting provider, someone operates it, patches it, and schedules the upgrades.

Sage Intacct is the opposite arrangement. Sage's own product page lists "True Cloud" and "Automatic updates" among its capabilities. There is no server for your team to own, and no upgrade weekend to plan.

For a storefront that runs around the clock, this matters. On Sage 100, the integration lives near the ERP and becomes part of your infrastructure. On Intacct, the question shifts from where it runs to how much it can ask for.

The commerce modules: orders, inventory, and pricing

Order entry. Sage 100 handles orders in its Sales Order module. If you manufacture, its Production Management module can create a work ticket to make the finished product in response to a sales order. That is the path a made-to-order web order needs. Intacct's Order Entry application lets you create quotes, sales orders, shippers, invoices, credit memos, and returns, and convert one transaction type into the next.

Inventory. Sage 100's Inventory Management module supports six costing methods, including lot and serial methods. Sage notes the lot method is common among food, drug, and chemical distributors. With its Require Multiple Warehouses option turned on, items are tracked by warehouse. Intacct's inventory is covered in its own section below, because it is where most of the "Intacct is just accounting" confusion lives.

Pricing. Sage 100 resolves a price through a six-level hierarchy. Promotion pricing comes first, then the customer price schedule, then item pricing by customer price level. After that come price levels in Price Code Maintenance, the standard price code, and finally the item's standard price. Intacct uses price lists, which Sage says you can assign to transaction definitions, customers, contacts, and price schedules. When several apply, Intacct uses an order of precedence to suggest a price.

Both engines can express contract and account pricing. Neither stores the answer on the product record, which is why exporting a price file into Shopify produces a copy that drifts. We walk through how these hierarchies decide a number in how ERPs decide what a B2B buyer pays.

Sage Intacct inventory management: what it covers and where it stops

Plenty of articles still describe Intacct as financials only. Sage documents Inventory Control as fully integrated with Purchasing, Order Entry, Accounts Payable, and Accounts Receivable. It manages stock at one location or many warehouses. It also supports an order fulfillment flow to receive, transfer, pick, pack, and ship. Cycle counts, replenishment, landed costs, and tracking are listed features.

So Sage Intacct inventory management is a legitimate system of record for a storefront. Orders can land in Order Entry, stock can come from Inventory Control, and purchasing can replenish it, all in one tenant.

Where it stops is operational rather than financial. Our Sage Intacct integration page draws the line where it actually sits. You add a warehouse or order management layer for advanced warehouse execution, available to promise across channels, third-party logistics, or very high volume. Selling online is not, by itself, the reason. If your distribution center runs on scanners and directed putaway today, that layer exists already, and the question is which system the storefront asks for availability.

Multi-entity: where Intacct pulls ahead

If you run more than one legal entity, this is usually the deciding row.

Sage's own Sage 100 product page says it is "best-suited to US-based, single entity businesses". That is Sage being candid about scope, and it explains why the controller in the opening meeting is unhappy. Intacct was built the other way. In a multi-entity Intacct company, each entity represents a separate tax ID or a fully balancing set of books. Customers, vendors, and the chart of accounts are shared across all of them.

For a storefront, shared customer lists are quietly useful. One buyer who orders from two of your companies can be one Shopify company account, with each order routed to the right entity behind the scenes. Want more entities but a server-based ERP? Read our Sage 300 integration page before assuming Intacct is the only move.

How Sage 100 and Sage Intacct integrate with Shopify

Here the two products are least alike, and the difference shapes the whole project.

Sage 100 has no REST API. Its main integration surface is the Business Objects Interface, which gives developers access to Sage 100 programs through the Component Object Model (COM). COM is a Windows technology, so a real-time integration needs a component running near your Sage server, holding a session and doing the work. The second surface, eBusiness Web Services, is SOAP running in IIS, and it covers only sales orders, customers, and customer contacts. Inventory is not in it.

The third surface, Visual Integrator, defines import jobs you can run immediately or on a schedule. That is fine for batch work and wrong for anything a buyer is waiting on.

Sage Intacct has two web APIs. The XML Web Services API is the long-standing gateway. The REST API became generally available in 2025 Release 1. Both run over the internet, so there is nothing to host.

The trade is that Intacct limits concurrent connections per tenant, and every call is counted. Sage's usage documentation says each record created, updated, or deleted counts as one transaction, and so does each read call. Sage's terms of service tie API transaction fees and overage fees to your performance tier. Sage 100 has no meter at all; its ceiling is the server and the component you run.

Both surfaces are written up in depth elsewhere. The Sage 100 integration page covers the Windows component and the held-order queue. The Intacct page covers the published concurrency, timeout, and query limits. For how these compare with other ERPs, see our guide to what ERP APIs actually expose.

What that means for a Shopify B2B storefront

The storefront side is the same for both. Sage customers become Shopify companies. Ship-to addresses become company locations with their own terms. Account pricing lands in Shopify B2B catalogs, which determine the products and prices each company can access.

Underneath, the plumbing differs.

On Sage 100, plan for infrastructure. The COM component is a moving part your storefront depends on. If it stops, orders stop reaching Sage. So orders have to queue with the exact Sage error attached and replay without asking the buyer to order again. Price schedules map well onto B2B catalogs, and prices Sage computes rather than lists can be resolved from Sage when needed, because nothing meters the calls.

On Sage Intacct, plan for economics. Picture a category page of forty products calling Intacct live for every price and stock check. It would burn your concurrency and your transaction allowance before anyone bought anything. The workable design syncs catalog, price, and stock into Shopify on a cadence tuned to your tier. Orders go into Intacct authoritatively, because an order is the transaction worth spending a call on. That is the opposite of the advice we give on most ERPs, and the API economics are the reason.

On either, settle the inventory number early. On hand is what the shelf holds. Available is what is left after counter sales, rep orders, and allocations. Pick one, per warehouse, and recheck it when the buyer hits checkout. A store that shows 40 when 30 are spoken for teaches buyers to pick up the phone instead.

Sage 100 vs Sage Intacct: should you switch before launching on Shopify?

Usually not for the storefront's sake. Shopify B2B works with either system behind it. Switching ERPs is a finance and operations decision with its own timeline, and tying a storefront launch to it delays both.

Ask these questions in order:

1. How many legal entities do you run? One, and Sage 100 fits Sage's own description of its sweet spot. Several, with consolidation pain, and Intacct deserves a serious look on its own merits. 2. Do you make things to order? Sage 100's Production Management creates work tickets from sales orders. If production lives in your ERP today, confirm where it would live after a move before you commit. 3. How complex is the warehouse? Scanning, directed putaway, or third-party logistics points to a warehouse layer regardless of which Sage product you run. 4. Who would operate the server? If nobody wants to own a Windows box, Intacct removes that job. If IT already runs Sage 100 comfortably, that is not a reason to leave. 5. What will the storefront cost to run? Sage publishes no list prices for either product; both product pages send you to a quote. Ask for your Intacct performance tier alongside the license, because the integration design depends on it.

If the honest answers say stay on Sage 100, launch on it. A Sage 100 Shopify integration typically runs 10 to 12 weeks, as set out on our Sage integration overview. If they say move, sequence it: settle the ERP, then build the storefront against the system you will still be running next year.

Uncap is a Shopify Platinum Partner and Shopify Expert since 2013, with over 380 projects shipped. Uncap Connect keeps Shopify and the ERP in two-way sync, built for B2B pricing, terms, and multi-location inventory. It is embedded inside Shopify rather than run as separate middleware. Talk to Our Experts, and bring your edition or tier, your entity list, and one account's price schedule. That is enough to tell you which side of this decision you are on.