How to Choose an eCommerce Development Company: Platform, Checkout and Support

To choose an eCommerce development company, look for a team that gives you honest platform advice instead of selling the one platform it knows, has built stores like yours in size and complexity, treats checkout, speed and payment security as priorities, can integrate with your stock, order and accounting systems, and offers clear support after launch. Design matters, but most of the money in online retail is made or lost in the parts customers barely notice when they work. This guide shows you what to check and how to compare proposals.

Start with the platform question

The platform decision shapes your costs, flexibility and the kind of company you need. A good eCommerce company will ask about your catalogue, order volumes, markets, team and integrations before recommending anything.

Ask each company to explain why its recommended platform fits your business better than the alternatives. If a company only ever recommends one platform, that may be fine, but it should be honest that it is a specialist. Also ask for the total cost of running the store on each option over two or three years, including platform subscriptions, transaction fees, paid apps or extensions, hosting, maintenance and support. A platform that looks cheaper to build on can cost more to run, and the reverse is also true.

Checkout and trust come first

Many stores lose more revenue at checkout than anywhere else. The Baymard Institute's cart abandonment research puts the documented average online cart abandonment rate at 70.22%, based on 50 studies. Among shoppers who abandoned during checkout, the most common reasons Baymard lists include extra costs being too high (40%), delivery being too slow (20%), not trusting the site with card information (19%), being required to create an account (18%) and a checkout that was too long or complicated (17%).

Use these findings to question companies. Ask how they would:

• Show shipping costs, taxes and delivery dates early, before the final step.
• Offer guest checkout and fast payment options.
• Build trust with clear returns information, contact details and recognisable payment marks.
• Keep checkout forms short and error messages clear.
• Test checkout on real phones, with real payment methods, before launch.

Speed is a sales issue

Slow stores frustrate buyers, especially on mobile. Google's Core Web Vitals guidance defines good thresholds as a Largest Contentful Paint within 2.5 seconds, an Interaction to Next Paint of 200 milliseconds or less and a Cumulative Layout Shift of 0.1 or less, measured at the 75th percentile of page loads. Ask each company:

• What speed targets will you commit to for product, category and checkout pages?
• How will you handle images, scripts from apps or plugins, and third-party tracking tags?
• How will you measure speed after launch using real user data?

Look at their past stores on a mid-range phone. Notice how quickly product pages become usable and whether the layout jumps as images load.

Payment security and compliance

Any business that takes card payments has responsibilities. The PCI Data Security Standard applies to entities that store, process or transmit cardholder data, or that could affect the security of the cardholder data environment. Most modern stores reduce their exposure by using hosted payment pages or payment provider fields so card numbers never touch their own servers. A good eCommerce company will:

• Recommend payment integrations that keep card data off your servers where possible.
• Explain what this means for your PCI DSS obligations and which provider documents you need.
• Keep the platform, extensions and plugins patched.
• Protect admin accounts with strong authentication and limited roles.
• Set up monitoring for suspicious activity, such as card testing attacks on checkout.

Integrations and operations

A store is part of a wider operation. Ask which of these systems the company has integrated before, and how:

• Inventory, warehouse or fulfilment systems, including third-party logistics partners.
• ERP and accounting software.
• Product information management for large or multi-language catalogues.
• CRM, email and SMS marketing platforms.
• Marketplaces such as Amazon or eBay, if you sell there too.
• Tax calculation and shipping rate services.

Integration failures often appear only under real order volumes, so ask how integrations are tested, monitored and retried when a connection fails. Ask, too, which system is the source of truth for stock levels, prices and customer data. When two systems both think they own the same information, you get overselling, wrong prices and duplicate customer records. A capable company will draw a simple diagram of how data flows between systems before writing any integration code.

Plan the project and the launch date carefully

eCommerce projects have a hard constraint that many other software projects do not: trading seasons. Launching a new store a week before your busiest period leaves no time to fix the problems that every launch uncovers. When you talk to companies, share your trading calendar and ask them to plan backwards from a launch window with a buffer before peak.

A well-planned eCommerce project usually includes these stages:

1. Discovery: business goals, customer research, catalogue structure, integrations, current analytics and a review of the existing store if there is one.
2. Platform and architecture decisions, written down and agreed.
3. Design of key templates (home, category, product, cart, checkout, account), tested with real shoppers where possible.
4. Build and integration, with regular demos on a staging store.
5. Data migration, run several times before the final cut-over.
6. Testing: functional, payment, tax, shipping, integration, speed and accessibility checks, including real orders placed and refunded.
7. Launch with a checklist covering redirects, tracking, email deliverability and monitoring.
8. Hypercare: a period of close support after launch, with quick fixes and daily checks.

Ask each company what it needs from your team at each stage. Product data, photography, copy, payment provider approvals and integration access often arrive late and delay launches. A company that flags these dependencies early is easier to work with.

Questions to ask an eCommerce development company

1. Which platform would you recommend for us, and what would make you recommend a different one?
2. Which live stores have you built that are similar to ours? Can we speak to the owners?
3. How will you protect our search traffic if we are migrating, including redirects?
4. How will you migrate products, customers, orders and reviews?
5. What checkout and speed improvements would you prioritise?
6. Which apps, plugins or extensions will we need, and what will they cost each month?
7. How will you test payments, taxes, shipping and integrations before launch?
8. Who will own the platform account, hosting, domain and code?
9. What does support look like during peak trading periods?

Red flags

• Design-only proposals that do not mention checkout, speed, integrations or migration.
• No redirect plan for a replatforming project.
• Card data handled on your own servers without a clear reason and a compliance plan.
• Accounts in the agency's name. Your platform, payment, hosting and domain accounts should be yours.
• Launching just before your busiest season with no buffer for fixes.
• No support plan for peak trading, when problems cost the most.

How to compare eCommerce proposals

eCommerce developers on Trusted IT Firms

Trusted IT Firms lists 105 companies offering eCommerce development. Of these, 47 list an hourly rate of $25 to $75, 28 list $1 to $25 and 12 list $75 to $250. There are 50 eCommerce development companies in India and 36 in the United States. If you already know your platform, browse specialists in Shopify, Magento or WooCommerce.

Shortlist three to five companies, ask the questions above and compare proposals on total cost and risk, not just the build price. Browse all companies on Trusted IT Firms, or list your eCommerce company for free.

Frequently asked questions

Which eCommerce platform is best?

There is no single best platform. Hosted platforms like Shopify suit many retailers, WooCommerce suits WordPress-based stores, and Magento or Adobe Commerce suit complex catalogues and B2B. Ask companies to compare options against your needs.

Why do shoppers abandon checkout?

Baymard Institute's research lists extra costs being too high, slow delivery, not trusting the site with card details, forced account creation and long or complicated checkouts among the top reasons.

Does my store need to comply with PCI DSS?

PCI DSS applies to entities that store, process or transmit cardholder data or could affect its security. Using hosted payment fields or pages reduces your exposure; ask your developer and payment provider what applies to you.

How do I protect SEO when changing eCommerce platforms?

Map every important old URL to its new address, set up 301 redirects before launch, migrate content and metadata, and monitor search performance closely afterwards.

Sources

• Cart Abandonment Rate Statistics (Baymard Institute)
• Web Vitals (web.dev)
• PCI Data Security Standard (PCI SSC)