How to Choose a Shopify Agency: 10 Questions to Ask Before Hiring

Choosing the wrong Shopify agency is an expensive mistake — both in money and time. A six-week build that drags to six months, a store that doesn’t load on mobile, or a handover with no documentation. It happens more than it should.

But the right agency can transform your business. A well-built, high-converting Shopify store, delivered on time, with clean code you actually own — this is what separates agencies that add real value from those that don’t.

Here are 10 questions to ask before you hire any Shopify development agency.

1. Can You Show Me 5 Stores You’ve Built in the Last 12 Months?

Past work is the most reliable predictor of future work. Ask for live URLs, not Figma mockups or screenshots. Visit each store on your phone. Test the checkout. Check the page speed on Google PageSpeed Insights. If a portfolio piece loads in 6 seconds on mobile, that’s a signal about the agency’s performance standards.

If the agency can’t show you 5 completed stores from the past year, either they’re new (not necessarily bad, but be eyes-open) or their best work is older than it should be.

2. What Is Your Process from Discovery to Launch?

A professional agency should have a clear, documented process. Discovery → wireframes → design → development → QA → launch. Each stage should have defined deliverables and sign-offs.

If the answer is vague (“we just build it and send you drafts”), probe further. Vague process = vague timelines = missed deadlines. The best agencies treat every project as a programme with a project manager, not a series of informal conversations.

3. Who Will Actually Build My Store?

Some agencies pitch senior developers and then hand the project to juniors or offshore contractors. Ask specifically: who will be my lead developer, what is their experience level, and will I have a named account manager?

There’s nothing wrong with offshore teams if the agency is transparent about it and the quality matches the price. The problem is when you’re paying premium rates for undisclosed subcontracting without the quality assurance to match.

4. How Do You Handle Revisions and Scope Changes?

Scope creep kills projects. Ask how the agency handles revision rounds (most include 2–3 per stage), what happens when you change your mind mid-project, and how change requests are priced. A fair agency will quote for changes transparently. A problematic agency will either absorb changes silently until they’re resentful, or ambush you with surprise invoices.

5. What Does Handover Include?

At the end of the project, what do you own? You should receive: access to all accounts (Shopify, domain, email), full Shopify theme files with no hidden code locks, documentation for any custom features, and ideally a walkthrough video of how to manage the store.

If an agency talks about “monthly maintenance retainers” before you’ve even launched, clarify whether these are optional or whether the store will stop functioning without them. Dependency should be your choice, not their business model.

6. Have You Built Stores in My Industry?

Industry experience matters. A Shopify agency that has built 10 furniture stores understands the specific challenges: large product catalogues, complex variant configurations, AR visualisation, long buying cycles, and high-value checkout anxiety. They won’t learn those lessons on your budget.

If the agency hasn’t worked in your vertical, ask how they’ll get up to speed. A prepared answer is a good sign. A dismissive “all ecommerce is the same” is a warning flag.

7. How Do You Approach Speed and Core Web Vitals?

Page speed is a Google ranking factor and a direct conversion rate driver. Ask specifically what PageSpeed Insights score they target on mobile (aim for 70+), how they handle image optimisation, and which themes they typically recommend or build on.

A developer who can’t answer this question in plain English probably isn’t prioritising it in their builds.

8. What Is Your Pricing Structure and What’s Included?

Understand what you’re actually buying. Fixed-price vs time-and-materials projects have very different risk profiles. Fixed price gives you cost certainty but less flexibility. Time-and-materials gives you flexibility but requires strong scope documentation to avoid budget overruns.

Get a full breakdown: design, development, third-party apps, any custom integrations, QA testing, and launch support. Surprises happen — but they should be surprises for the agency to absorb, not you.

9. Can I Speak to Two Previous Clients?

References are underused. Ask to speak to two clients — ideally in similar verticals. Ask those clients: Did the project come in on time and on budget? Was communication proactive or did you have to chase? If you had a problem, how did the agency respond? Would you hire them again?

An agency that hesitates to provide references is telling you something. An agency that connects you with enthusiastic clients gives you direct evidence, not a sales pitch.

10. What Happens After Launch?

Launch day is the beginning of your store’s life, not the end of the project. Ask about post-launch support (bug fixes, for how long, at what cost), whether they offer ongoing retainers for growth (SEO, CRO, ads), and how they handle urgent issues in the first 30 days.

The best agencies want a long-term relationship, not a transaction. They’ll have an answer to this question that reflects genuine post-launch care — monitoring, analytics review, and a plan for ongoing improvement.

Red Flags to Watch For

• No live portfolio examples (only screenshots or mockups)
• No named project manager or account manager
• Vague timelines (“around 6 weeks”)
• No written contract or scope of work
• Pressure to sign quickly or take a “limited time” price
• Can’t explain their QA or testing process
• Unclear ownership of code, accounts, and assets post-handover

What a Good Shopify Agency Looks Like

The right agency is one that asks as many questions as you do. They’ll want to understand your customers, your competitors, your conversion goals, and your operational constraints before quoting a single number. They’ll have a clear process, transparent pricing, verifiable past work, and a handover that leaves you in full control.

OneOnic has built Shopify stores for brands across furniture, fashion, home décor, ceramics, and lifestyle across the UK, UAE, Australia, and beyond. If you’re looking for a Shopify agency that answers all 10 of these questions confidently, we’d love to talk.