An online store might have a great design, a decent product catalog, and an easy-to-use shopping cart. A customer visits the site, selects an item, and places an order. On the surface, everything looks smooth.
But behind the scenes, the manual work begins.
The manager opens the admin panel, copies the order into the CRM, checks the payment in a separate account, verifies the balance in the accounting system, manually creates a shipment, and then sends the tracking number to the customer. If there are two or three orders a day, that’s still manageable. When there are twenty, thirty, or fifty—errors become almost inevitable.
Somewhere, a price wasn’t updated. Somewhere on the website, a product is listed that’s no longer in stock. Somewhere, a payment was spotted too late. Somewhere, an order came in, but the manager was busy and didn’t get back to it until the next day.
It is at this very moment that businesses usually remember about integrations.
Why does a website need integration with CRM and accounting systems?
Integration is necessary when a website can no longer operate independently of a company’s internal processes. It receives orders, and that data must then be fed into the workflow: to managers, the warehouse, accounting, shipping, and analytics.
If this exchange doesn’t happen, people have to transfer everything manually. And manual work always depends on the attentiveness of a specific person. Today the manager checked everything. Tomorrow they might be tired, distracted, mistype a number on the phone, or miss a new order.
The website, CRM, BAS, ERP, payment system, and delivery service shouldn’t interfere with each other—they should exchange data. Then an order doesn’t just appear on the website; it follows a standard process: received, paid for, assigned to a manager, prepared, shipped, and closed.
For a business, this isn’t about “pretty automation.” It’s about processing speed, fewer errors, and proper control over sales.
What is typically connected to a website
The set of integrations depends on the project. For a small service website, a CRM and notifications are often sufficient. An online store, on the other hand, requires payment processing, shipping, inventory management, stock levels, and order statuses. A B2B project may need a customer portal, customized pricing, documents, and integration with an ERP system.
The most common integrations for a website are:
- CRM — so that requests and orders are immediately sent to managers;
- BAS or another accounting system — for inventory, pricing, stock levels, and documents;
- ERP — if you need to connect the website to a warehouse, procurement, logistics, or manufacturing;
- payment services — for online payments;
- delivery services — to calculate costs, select a branch, and generate waybills;
- analytics — to see where sales are coming from;
- email, SMS, Viber, or Telegram notifications — so customers receive order status updates;
- marketplaces — if products are sold outside the website.
But you don’t need to connect everything at once. Sometimes a business only needs CRM and delivery. Sometimes the main pain point is inventory. Sometimes the problem is payment. First, you need to understand exactly where time is being wasted, and only then choose a technical solution.
Website integration with CRM
CRM is usually one of the first systems to be implemented. The reason is simple: inquiries must not get lost.
Without a CRM, orders are often scattered across different channels. One comes in through the website, another via a messaging app, a third by phone, and a fourth through a contact form. The manager keeps track of everything in their head, jots it down in a notebook, or maintains a spreadsheet. This works until the first real surge in workload.
After integration, a request from the website goes straight into the CRM. You can transfer the name, phone number, email, product, order total, customer comment, referral source, and payment status to the card. The manager doesn’t create a deal manually but works directly with the ready-made request.
This is also a plus for the manager. They can see how many requests have come in, who is processing them, where orders are stuck, how many customers have canceled, and which channels are generating sales. Without a CRM, all of this usually has to be collected manually and after the fact.
Integration with BAS and the accounting system
Accounting systems always involve more nuances. In theory, the task seems simple: transfer products, prices, inventory levels, and orders. In practice, every company has its own procedures.
One store might have a single warehouse and a single price for all customers. Another might have multiple warehouses, wholesale customer groups, different currencies, discounts, product bundles, specifications, and inventory reservations. In one project, you simply need to upload products to the website. In another, you need to establish a two-way exchange: the website receives prices and inventory levels, and sends back orders, customers, payments, and statuses.
Before integration, you need to figure out where the “single source of truth” lies within the business. Where are products created? Where are prices updated? Where are stock levels recorded? Who processes the order after it’s placed? What needs to be sent to the website, and what should the website send back?
Without this, integration quickly turns into a mess. The price on the website is one thing, in the CRM it’s another, and in the accounting system it’s a third. The manager doesn’t know what to believe. Neither does the customer.
There’s another point that’s often overlooked: integration doesn’t fix messy data. If the accounting system has duplicate products, inconsistent product names, outdated SKUs, and disorganized categories, the website will automatically inherit all of that. That’s why, sometimes, you have to clean up the product catalog before setting up the data exchange.
Integration with ERP
ERP systems aren’t always integrated. Typically, this is necessary for companies where the website is linked not only to sales but also to internal processes: warehousing, procurement, manufacturing, logistics, and finance.
For example, a customer places an order on the website. The system then checks inventory, revers the item, sends the order to the warehouse, generates documents, updates the order status, and sends a notification to the customer. The manager doesn’t have to manually piece this chain together but instead oversees the process.
For a simple store, such a system may be unnecessary. For a distributor, manufacturer, B2B platform, or large e-commerce business—on the contrary, without it, manual workarounds quickly become necessary.
Payment and Shipping
The customer doesn’t see your backend system. Instead, they immediately see whether it’s easy to pay for their order and arrange delivery.
If the payment service is set up correctly, the customer pays for the order on the website, and the system automatically receives confirmation. There’s no need to wait for a screenshot, manually check for the payment, or update the order status in the admin panel.
It’s a similar story with shipping. The customer selects a city, branch, or parcel locker, sees the cost, and the manager then creates the shipment without manually copying the data. The more orders you have, the more time you save.
This is especially important for stores that process dozens of shipments every day. One mistake in a phone number or branch—and the order needs to be corrected, the customer has to be called back, and time is wasted.
How the website exchanges data with services
The method of data exchange depends on the system and the task.
Sometimes an API is used. The website sends a request and receives a response: an order was transferred to the CRM, stock levels were retrieved, or payment status was checked.
Sometimes webhooks are used. In this case, the external service notifies the website of an event on its own. For example, a payment was successfully processed or an order received a new status.
For some tasks, XML or CSV files are sufficient. This isn’t the most modern option, but it still works well where data is updated on a schedule. For example, prices and stock levels are uploaded several times a day.
There are ready-made modules for CMS platforms. For WordPress, WooCommerce, and OpenCart, there are many available: payment, shipping, CRM, analytics, and product exchange. But a module is no guarantee of results. It needs to be configured, tested, and sometimes customized for a specific process.
Custom integration is needed when a standard module falls short: non-standard fields, multiple warehouses, different prices for customer groups, complex discounts, or integration with multiple systems simultaneously.
Why can’t you just “install the module”?
This is a common mistake. Businesses buy a module, install it on their website, and expect everything to work on its own. Sometimes it actually does. But not always.
The module might not pass the necessary fields. It might conflict with the theme or other plugins. It might not support your status logic. It might work fine with ten products but slow down with ten thousand.
That’s why, before installation, you need to at least briefly describe the process: what happens after an order is placed, what data goes where, who changes the status, where payment is recorded, and when stock levels are updated.
Without such a plan, even a good module can be configured poorly.
In what order should integrations be connected?
It’s best not to set everything up at once. That way, it’s easier to pinpoint the problem if something goes wrong.
First, check the ordering process on the website: shopping cart, checkout, emails, statuses. Then connect the payment system and test different scenarios: successful payment, error, cancellation, refund. After that, set up shipping: selecting a branch, calculating the cost, creating a waybill.
Next, you usually integrate the CRM. You need to verify that the order arrives with all the necessary data: product, amount, phone number, email, comment, and source. And only then should you integrate the accounting system, if it handles inventory, pricing, stock levels, and documents.
In complex projects, the order may differ. But the principle remains the same: first, a clear process; then, the technical integration.
What to test before launch
An integration isn’t considered complete just because “it seems to be working.” You need to test real-world scenarios.
Test orders without payment, orders with payment, payment errors, returns, transferring requests to the CRM, creating shipping labels, updating stock levels, changing statuses, and customer notifications. It’s also worth checking what happens if the external service is temporarily unavailable.
The website shouldn’t crash just because the CRM, payment service, or delivery provider didn’t respond at the exact right moment. Proper integration should log the error, allow for a retry, and not disrupt the customer’s checkout experience.
How does a CMS affect integrations?
The website platform matters too.
WordPress with WooCommerce offers many ready-made solutions. This is convenient, especially for small and medium-sized stores. But if the site is overloaded with plugins or has been modified by various contractors, new integrations can cause conflicts.
OpenCart is inherently more geared toward online stores. There are many modules available for it as well, but their quality varies. Some can be used without issue, while others require immediate customization.
Shopify is convenient as a cloud platform, but for non-standard tasks, you need to take into account the limitations of the system itself and third-party applications.
If the site is already live, it’s better to conduct a technical audit before undertaking a complex integration. Review the order structure, plugins, theme, speed, errors, and database. This is cheaper than having to fix the integration on a live project later.
When integration is truly necessary
Not every website needs complex automation from day one. If you have few products, few orders, and the manager can easily handle everything manually, there’s no need to rush.
But integration is already necessary if products are difficult to update manually, stock levels change frequently, orders come in from multiple channels, managers spend a lot of time copying data, and errors appear in phone numbers, addresses, and statuses. Another sign is when the business is planning advertising, expanding its catalog, or connecting new sales channels.
A good option is to build in the ability for integrations right from the website development stage. Even if you’ll connect them later. That way, you won’t have to redo half the project six months down the line.
How we handle these types of tasks
At Estetic Web Design, we don’t start by choosing a module; we start with the process. First, we analyze how the business takes orders, where products are managed, who updates prices, where payments are processed, how the warehouse operates, and what data managers need.
After that, it becomes clear what’s best: a ready-made module, tweaking an existing solution, an API, file exchange, or a separate custom integration.
For a simple project, careful configuration is often enough. For a complex online store, it’s better to design the integration as a separate part of the system rather than thinking, “We’ll just add a plugin later.”
Integrating the website with CRM, ERP, BAS, payment, delivery, and accounting systems is necessary when manual work starts to hinder sales. It helps process orders faster, manage inventory more accurately, avoid losing orders, and see the real picture regarding customers.
The key is not to connect services haphazardly. First, you need to understand the business process, identify the main systems, choose a data exchange method, test real-world scenarios, and only then launch the integration.
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