How to Choose a Shopify Development Agency: Questions to Ask Before You Hire

By Emily Carter · Oct 28, 2026 · 7 min read

Shopify makes it easy to open an online store. Growing one is harder. Once you need a custom theme, complex integrations, a migration from another platform or faster pages, most store owners start looking for outside help. The problem is that "Shopify agency" covers everyone from a freelancer who installs themes to a full team that builds headless storefronts.

This guide walks you through how to choose a Shopify development agency that fits your store, your budget and your plans. It is written for owners and ecommerce managers in the USA and UK who want a practical checklist, not a sales pitch.

Start with what you actually need

Before you speak to any agency, write down the problem you want solved. Agencies are good at selling what they already do, so a clear brief protects you from buying more (or less) than you need. Most Shopify projects fall into one of these groups:

New store build: a custom or customized theme, product and collection setup, apps, payments and shipping.
Redesign: a new look and better user experience on an existing store, without losing products, URLs or search rankings.
Migration: moving from WooCommerce, Magento, BigCommerce or a custom platform to Shopify, including customers, orders and redirects.
Performance and conversion work: speed fixes, checkout improvements and testing on a store that already works but underperforms.
Headless or custom development: a custom front end built on Shopify's APIs, private apps or deep integrations with ERP, inventory or CRM systems.
Ongoing support: a retainer for fixes, small features and seasonal changes.

If you are unsure whether you need a standard theme or a headless build, read our comparison of headless Shopify vs standard Shopify first. It will shape which agencies are even worth contacting.

The skills a good Shopify agency should have

Shopify development is more than front-end design. Look for evidence of these capabilities, and ask who on the team will actually do the work.

Theme development and Liquid

Most stores run on a theme. A capable agency can build or extend themes using Liquid, Shopify's templating language, and Online Store 2.0 sections, so your team can edit pages without calling a developer every time.

Apps and integrations

Ask how they decide between an off-the-shelf app and custom code. Too many apps slow a store down and add monthly fees. A good agency will tell you when an app is fine and when a small custom feature is cheaper in the long run.

Performance

Page speed affects both search rankings and sales. Ask how they measure Core Web Vitals and what they do about heavy images, scripts and apps. Our guide to ecommerce checkout optimization covers the conversion side of the same problem.

UX and conversion design

A pretty store that confuses shoppers is a poor investment. The agency should be able to explain how product pages, navigation, search and checkout are designed to help people buy, ideally backed by UI/UX design and analytics, not just taste.

SEO and migration care

Redesigns and migrations are where rankings get lost. The agency should map old URLs to new ones, set up redirects, keep metadata and structured data, and check Search Console after launch.

Questions to ask before you hire

Use these questions on every discovery call. The answers tell you more than a portfolio does.

Can you show us stores similar to ours? Similar in catalogue size, market or complexity, not just similar in style.
Who will work on our project? Ask whether the work is done in-house or subcontracted, and who your day-to-day contact will be.
How do you scope and price the work? Fixed price, time and materials or a retainer can all be fair. What matters is that you understand what is included.
What does your process look like? Look for discovery, design approval, development in stages, testing and a planned launch.
How will you protect our SEO? Expect a clear answer about redirects, metadata and post-launch monitoring.
How do you handle apps? Ask for a list of the apps they plan to use and why.
Who owns the code and the store? Your store, theme code and accounts should be in your name.
What happens after launch? Ask about bug fixes, warranty periods, support hours and response times.

Red flags to watch for

Guaranteed results. No honest agency can promise a specific revenue or ranking increase before seeing your data.
No discovery phase. A quote sent before anyone has asked about your products, customers and systems is a guess.
An app for everything. If every feature is solved by another subscription, your store will get slower and more expensive.
Vague ownership terms. Be careful if the agency wants the store, domain or theme registered under its own account.
No testing plan. Ask how they test on mobile, across browsers and through the full checkout before launch.
Silence on support. If nobody can explain who fixes problems after launch, you will find out the hard way.

How to compare proposals fairly

Proposals rarely line up neatly. One agency may include design, another may assume you supply it. Put each proposal into a simple table with these rows:

Scope: pages, features, integrations and data migration included.
Design: number of templates designed, revision rounds and who approves.
Timeline: key milestones and launch date.
Testing: devices, browsers and checkout testing.
SEO: redirects, metadata and post-launch checks.
Training: how your team will learn to manage the store.
Support: what is covered after launch and for how long.
Ongoing costs: apps, hosting for any headless front end and retainer fees.

Cost factors that genuinely move the price include the number of custom templates, the size and messiness of your product data, how many systems need to connect, whether you need multiple currencies or languages, and whether the front end is headless. Ask each agency to explain which of these drive their quote.

What good results look like

The best way to judge an agency is by the problems it has solved, explained in plain language. In our ecommerce platform case study, a slow storefront and a checkout that lost buyers were rebuilt on a headless stack with a one-page checkout and AI product recommendations. The result was a 250% increase in conversions, a 38% drop in cart abandonment and average page loads of 1.2 seconds.

Ask every agency you speak to for this kind of story: the challenge, what they changed and what was measured afterwards. If they cannot explain the "why" behind their work, keep looking.

Think beyond the build

A store launch is the start, not the finish. Plan for what comes next:

Customer service: more orders mean more questions about delivery, returns and products. Many brands pair their build with outsourced customer support or live chat support so shoppers get answers quickly.
Marketing: traffic does not arrive on its own. SEO, email and paid campaigns need a plan from the digital marketing side.
Continuous improvement: small tests on product pages and checkout often add up to more than a big redesign every few years.

An agency that can talk about these stages, even if it does not deliver all of them itself, is usually one that understands how stores grow.

A simple shortlist process

Write a one-page brief covering goals, current platform, integrations, timeline and budget range.
Contact three to five agencies with relevant Shopify work.
Hold a discovery call with each and ask the questions above.
Request written proposals and compare them in one table.
Speak to at least one past client of your top choice.
Start with a paid discovery or audit phase if the project is large, so you can test the working relationship before committing to the full build.

Frequently asked questions

Do I need a Shopify Partner agency?

Shopify Partner status shows that an agency works on the platform, but it is not a guarantee of quality. Judge agencies on relevant work, process and references rather than badges alone.

Should I hire a freelancer or an agency?

A freelancer can be a good fit for small theme changes. For a full build, migration or anything with integrations, an agency gives you design, development, testing and project management in one team, plus cover when someone is unavailable.

How long does a Shopify build take?

It depends on scope, data migration and integrations. A good agency will give you a schedule with milestones after discovery, rather than a number pulled from the air.

Can an agency improve my existing store instead of rebuilding it?

Often, yes. A performance and UX audit can show whether targeted fixes will deliver more value than a full rebuild. Ask for this option before agreeing to start from scratch.

Talk to a Shopify team that explains its thinking

Scalovanta's web development team builds, migrates and improves Shopify and headless stores for businesses in the USA and UK. If you want a second opinion on your store or a proposal you have received, book a free consultation and we will give you honest, practical advice.