OMS vs ERP vs accounting software: what should Thai online sellers choose
You have heard of OMS, ERP, and accounting software but are not sure what each does or which one your store needs. This guide explains all three clearly, no technical jargon.
What is an OMS
OMS stands for Order Management System. Its job is to receive orders from every channel, manage inventory, print shipping labels, and track order status until delivery. Built for online stores that sell across multiple marketplaces. Good for cutting order management time and preventing overselling.
What is an ERP
ERP stands for Enterprise Resource Planning. It covers an entire organization, accounting, finance, HR, inventory, production, and OMS all in one system. Suited for medium-to-large companies that need to control all organizational resources in one place. Complex, difficult to use, and expensive. Not suited for small-to-medium online stores.
What is accounting software
Accounting software handles the financial and bookkeeping side, recording income and expenses, generating documents, financial statements, tax invoices, and tax filing. Thai examples include PEAK and FlowAccount. It does not handle order management. It needs to be paired with an OMS.
Quick comparison: OMS, ERP, accounting
OMS suits online stores of any size, focuses on order management and inventory, accessible pricing, easy setup. ERP suits medium-to-large organizations, covers the entire business, expensive, long implementation time. Accounting software suits all businesses for the financial side, but must be paired with an OMS. Seller Pao combines OMS and accounting in one system. No need to buy two separate tools.
What should Thai online sellers start with
For most Thai online stores with teams of 1-50 people, starting with an OMS is the right answer, not an ERP. An OMS solves dropped orders, overselling, and manual management time immediately. When the business grows and ERP features like HR or production become necessary, that is when to consider ERP. Seller Pao is an OMS with accounting built in, eliminating the need to buy separate accounting software.
คำถามที่พบบ่อย
Does a small store need an OMS?
If orders are under 20 per day and you sell on one channel, manual management is still workable. But once you start selling across multiple channels or order volumes increase, an OMS saves significant time and is more cost-effective than the errors that come from doing it manually.
How is an OMS different from a marketplace dashboard like Shopee Seller Center?
Shopee Seller Center only shows Shopee orders. An OMS consolidates orders from every marketplace in one place and adds inventory management, batch label printing, and cross-platform sales analytics.
What size business is ERP suited for?
ERP fits when a business has high complexity, such as manufacturing, multiple branches, multiple group companies, or a need to control all organizational resources in one system. Generally suited for companies with 50 or more employees.
If I use Seller Pao, do I still need separate accounting software?
No. Seller Pao includes accounting built into the same system. Record revenue, generate tax invoices, create financial reports, all within Seller Pao. If your accountant prefers another system, you can export the data.
Does Seller Pao have ERP features?
Seller Pao covers the core features online stores need: OMS, accounting, warehouse management, and AI. It does not cover an entire organization the way a full ERP does. But it answers Thai online sellers needs more completely than an expensive ERP built for factories.
How much does Seller Pao cost?
Free plan available. Growth plan starts at 590 THB/month. Pro starts at 1,490 THB/month. Enterprise is custom pricing. All plans include a free trial. No credit card required.