Why ERP integration matters
You always need an ERP — accounting requirements in Sweden demand it. The ERP system is the source of truth for inventory, pricing, customer accounts, invoicing, and financial transactions. Without proper integration between your ERP and ecommerce platform, teams end up with manual data entry, stock mismatches, delayed invoicing, and customer frustration.
What gets synced
Orders: Ecommerce → ERP. Every order flows into the ERP for invoicing, fulfillment, and accounting.
Inventory: ERP → Ecommerce. Real-time stock levels prevent overselling.
Customers: Bidirectional. Customer accounts, credit limits, and B2B pricing stay in sync.
Products: ERP or PIM → Ecommerce. Product data, pricing, and availability from the master source.
Pricing: ERP → Ecommerce. Customer-specific pricing, volume discounts, and contract terms in real time.
Invoices: ERP → Ecommerce. Invoice status, payment confirmations, and credit notes.
Common ERPs
Fortnox: Sweden's most popular business system. Handles invoicing, accounting, stock, and customer data. Junipeer connector: live same-day, from 30 minutes.
Business Central: Microsoft's cloud ERP. Strong in mid-market and enterprise. Global reach. Junipeer connector available.
Visma.net: Nordic cloud ERP, growing in mid-market. Junipeer connector available.
SAP S/4HANA / SAP Business One: Enterprise-grade. Complex but comprehensive.
NetSuite: Oracle's cloud ERP. Popular with international companies.
Also supported: Monitor, Pyramid, Hogia, Briljant, Jeeves, Xledger, Tripletex, PowerOffice Go, e-conomic, Visma Business, Business NXT, Dynamics NAV, IFS, Infor M3, Specter, 24SevenOffice.
Fortnox is the most widely used ERP in Sweden and covers accounting, invoicing, inventory, and payroll. Its API is well-documented and supported by most integration platforms, making it a straightforward choice for small to mid-sized ecommerce businesses. Business Central from Microsoft offers deeper functionality for growing companies that need multi-entity support, advanced warehouse management, and built-in business intelligence. Visma.net provides a cloud-native ERP with strong automation capabilities and is especially popular among companies that want a Nordic-first solution with solid multi-company support.
The middleware approach
Point-to-point integrations between ecommerce and ERP become fragile as complexity grows. Junipeer acts as an iPaaS (integration Platform as a Service) — a single connection point between your ecommerce platform and all backend systems.
This means: one integration to maintain instead of many, pre-built connectors for common ERPs (live same-day — from 30 minutes for standard setups), fully custom integrations supported, monitoring dashboards for integration health, and the ability to swap either the ecommerce platform or the ERP without rebuilding everything.
The middleware approach, often implemented through an iPaaS (integration platform as a service), abstracts the complexity of mapping fields between your ecommerce platform and ERP. Rather than building point-to-point integrations that break when either system updates, a middleware layer like Junipeer translates data between systems using pre-built connectors. Standard ERP integrations through Junipeer can go live the same day, in as little as 30 minutes, which eliminates weeks of custom development. The middleware also provides monitoring, error handling, and retry logic that would be expensive to build and maintain in a custom integration.
Beyond ERP — the full integration picture
ERP isn't the only integration. A complete ecommerce setup also connects:
Payment: Klarna, Svea, Adyen, Nets, Walley, Avarda, Briqpay, Qliro, Mollie, Kustom.
Shipping: Ingrid (delivery checkout) and nShift (transport management).
CRM: Klaviyo, Dotdigital, Rule, Yotpo, Nosto.
All connect through Junipeer — the same middleware layer that handles your ERP integration.
Platform-specific considerations
All four platforms — Shopify, Norce, Shopware, and Magento — integrate with any ERP via Junipeer. The differences are in webhook maturity, API event coverage, and how order/inventory events are exposed. Junipeer abstracts these differences so you don't have to build platform-specific integration code.
Frontend considerations alongside ERP
ERP integration isn't just a backend concern. The frontend needs to display real-time inventory, customer-specific pricing, and order status — all sourced from the ERP. Frntkey, NWT's plug-and-play headless storefront, is built to consume these API-driven data flows natively. It renders ERP-sourced prices, stock levels, and customer account data without custom frontend development.
For Magento stores, Hyvä provides a modern frontend that connects seamlessly to Magento's ERP integration layer. Both approaches ensure that ERP data reaches the customer in real time, not through overnight batch syncs.
Implementation approach
Start with the highest-impact data flows: orders and inventory. These cover the critical path — customers placing orders and seeing accurate stock. Add customer sync, pricing, and invoicing in subsequent phases. This phased approach reduces risk and delivers value faster than trying to sync everything at once.
For companies with complex requirements — multi-warehouse, multi-currency, or cross-border — plan the data model carefully before building. Junipeer's monitoring dashboards help track integration health and catch issues before they affect customers.
Frontend considerations
When integrating an ERP with your ecommerce platform, the frontend experience deserves careful attention. Stock levels, pricing, and delivery estimates often originate in the ERP and must be reflected accurately and in real time on the storefront. A headless architecture makes this easier because the frontend can call APIs independently of the ecommerce backend, reducing latency and decoupling display logic from business logic.
Frntkey provides a plug-and-play headless storefront that is built to work with API-driven data sources. Because it ships with product pages, cart, checkout, and account functionality ready to go, your team can focus on configuring the ERP data flow rather than building frontend components from scratch. This is particularly valuable in ERP-heavy projects where the majority of development effort should go toward data mapping and business rules rather than UI work.