Start with the business model
Write down your catalogue size, product variants, selling countries, currencies, fulfilment model and required integrations. Separate a genuine launch requirement from a feature you might use later. A small direct-to-consumer store and a multi-store B2B operation can both sell online, but they need different operating systems.
When Shopify is a good fit
Shopify can suit teams that prefer managed hosting, a supported checkout and an established app ecosystem. Assess subscription and app fees, checkout constraints and supported payment providers. Do not assume a feature shown by an app is included in the base platform or available in every country.
When WooCommerce is a good fit
WooCommerce is worth considering when WordPress content and customization are central to the business. You take more responsibility for hosting, updates, backups and extension compatibility. Compare the cost of that maintenance with the flexibility you gain, and decide who owns operational support after launch.
When Magento needs a closer look
Magento Open Source and Adobe Commerce deserve a requirements-led assessment for complex catalogues, B2B or multi-store workflows. Specialist engineering, hosting and upgrade costs should be part of the decision. Enterprise capability is not automatically a benefit if your team will not use it.
Test the decision before committing
Run a representative product, discount, shipping rule and refund through the proposed setup. Confirm the payment provider will consider your merchant account and that critical integrations work. Record the evidence, recurring costs and handover responsibilities in the project proposal.
Sources & further reading
This guide provides general planning information. Provider terms and authority requirements can change. Confirm current requirements with the relevant organization; obtain qualified advice where needed.