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Choosing the wrong Shopify Plus agency can cost you tens of thousands of pounds and months of wasted time. Choosing the right one can completely transform your ecommerce business.
But with dozens of agencies claiming to be "experts," how do you know who to trust?
This guide walks you through exactly what to look for — and what to avoid — when hiring a Shopify Plus agency in the UK.
What Is a Shopify Plus Agency?
A Shopify Plus agency is a development and design studio that specialises in building, customising, and scaling stores on the Shopify Plus platform. Unlike standard freelancers or general web agencies, Shopify Plus partners are vetted by Shopify itself and have demonstrated experience handling enterprise-level ecommerce projects.
Official Shopify Plus Partners (like Hi Ecom) are listed in the Shopify Partner Directory — a useful starting point for any search.
5 Things to Look for in a Shopify Plus Agency
1. Proven Case Studies With Real Results
Any agency worth hiring should be able to show you specific results from previous clients — not just pretty screenshots.
Look for numbers: conversion rate improvements, revenue increases, load speed gains, or reduction in cart abandonment. Vague statements like "we built a great store for Brand X" are a red flag. Specific results like "we increased Brand X's conversion rate by 2.4% in 6 weeks" tell a very different story.
2. Shopify Plus Partner Status
This is non-negotiable. Being an official Shopify Plus Partner means the agency has been reviewed by Shopify, has completed platform certifications, and has a track record of successful Plus builds.
You can verify any agency's partner status directly through the Shopify Partner Directory.
3. Industry-Specific Experience
A Shopify Plus agency that has worked extensively with fashion brands may not be the best choice for a supplement or wellness company — and vice versa. Look for an agency that understands your niche, your customer psychology, and the specific challenges of your industry.
For lifestyle, wellness, and supplement brands, this means understanding subscription models, regulatory constraints on product claims, high-volume flash sales, and loyalty programme integrations.
4. Clear Process and Timeline
Good agencies have a defined process. At Hi Ecom, for example, our process goes: Free Store Audit → Strategy & Proposal → Figma Design → Build & Develop → Launch & Handoff. Every step has a clear timeline and deliverable.
If an agency can't clearly explain what happens after you sign the contract, that's a serious red flag.
5. Post-Launch Support
Your store doesn't stop needing attention the day it launches. Bugs appear. New features are needed. Campaigns require technical support. Ask any prospective agency what their post-launch support looks like — whether that's a retainer model, pay-as-you-go, or something else.
Questions to Ask Before You Hire
Before signing with any Shopify Plus agency, ask these questions:
- What's your average project timeline from kickoff to launch?
- Can I speak to a previous client in my industry?
- Who will be my day-to-day contact?
- What does your QA and testing process look like before launch?
- How do you handle scope creep if requirements change mid-project?
- Do you offer retainer support after launch?
Their answers will tell you more than any portfolio.
Red Flags to Avoid
- No case studies or vague results — experience should be demonstrable
- Lowest price in the market — quality Shopify Plus development is not cheap; if it sounds too good to be true, it usually is
- No defined process — winging it leads to missed deadlines and budget overruns
- Offshore team with no UK presence — timezone and communication gaps slow projects down significantly
- Can't explain their strategy — building a pretty store is not the same as building a converting one
How Much Does a Shopify Plus Agency Cost in the UK?
You can expect to pay anywhere from £5,000 for a basic theme customisation to £50,000+ for a full custom Shopify Plus build with bespoke functionality.
Most quality agencies in the UK operate in the £10,000–£30,000 range for a complete store build. Be wary of agencies quoting dramatically below this — cutting corners on development almost always costs more to fix down the line.
Why Work With Hi Ecom?
Hi Ecom is an official Shopify Plus Partner specialising in lifestyle, wellness, and supplement brands. We've helped clients achieve results like 240% increases in email revenue, 4.5–6% conversion rates, and $10K months — all within a 6-week build timeline.
We're not a generalist agency. We understand your customer, your market, and what it takes to build a Shopify store that actually converts.
Book a free store audit with Hi Ecom →
Written by the Hi Ecom team — official Shopify Plus Partners helping lifestyle and wellness brands build high-converting stores.