How to pick the best Shopify agency — honestly.
Most 'best Shopify agency' lists are sponsored. This one is the working framework we'd hand a friend evaluating Shopify shops without getting played. Criteria that move revenue, red flags to skip, and the questions worth asking on the call.
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Bias disclosure
We're a Shopify agency. We're telling you anyway.
We make the case for our own way of working at the bottom — separately from the framework. The criteria above are the same ones we'd hand to a friend evaluating shops they shouldn't trust us to review.
Red flags
Six warning signs in a Shopify agency pitch.
If two or more match a current shortlist, look harder.
App-stack-first answers
Every requirement met with 'there's an app for that.' Site ends with 30 apps, $700+/month in subscriptions, and a slow store. The best Shopify agencies build into the theme first.
No Shopify Plus references
Pitching for Plus work without Plus references. Plus has its own ceiling — checkout extensibility, B2B, Functions, multi-store — and it shows up in the work, not the deck.
Premium theme as portfolio
Portfolio sites all use the same paid theme with light skinning. Editorial flexibility is whatever the theme permits. Custom theme capability is missing.
No talk of Core Web Vitals
Performance covered as 'we'll install a speed app.' No mention of selective app loading, theme audit, image policy, or real-user CrUX data. Speed is decorative.
No CRO discipline
Conversion mentioned only in the pitch. No talk of hypothesis-led testing, PDP/PLP-specific work, or instrumentation. CRO is a buzzword, not a practice.
No SEO continuity plan
Migration scoped as 'we'll move the products.' No redirect map, no schema parity, no 30-day post-launch monitoring. Catalog rankings drop and stay dropped.
Evaluation framework
What separates the best Shopify agencies from the rest.
Beyond Shopify Partner badges and Clutch reviews. These are the criteria that decide whether the store actually lifts revenue.
Senior commerce thinking
- Named senior engineers and merchandiser-fluent designers
- Founders / partners stay in the work past sale
- Same team from kickoff to launch
- Five-plus years of Shopify in the bench
- Plus and B2B references when relevant
Real custom theme capability
- Hand-coded Liquid in shipped portfolio (not paid-theme skinning)
- OS 2.0 sections, blocks, and metafield discipline
- Custom checkout extensibility (Plus)
- Headless Shopify (Hydrogen / Next.js) experience when relevant
- Custom apps and integrations when needed
Performance discipline
- Real-user CrUX baseline, not Lighthouse from a clean cache
- Per-template performance budgets
- Selective app loading and rationalization
- Image policy (AVIF/WebP, srcset, fetchpriority)
- 30-day real-user monitoring post-launch
SEO baked in
- Schema (Product, Offer, BreadcrumbList, Review) by default
- Catalog architecture (collection, attribute, filter) thought through
- Migration playbook with redirect map + 30-day monitoring
- Internal linking before content goes live
- Optional SEO retainer for ongoing work
Conversion practice
- Hypothesis-led PDP/PLP test cadence
- Analytics instrumented to your KPIs (not just GA4 defaults)
- GTM, Meta CAPI, server-side tagging fluency
- PDP, PLP, cart, checkout, account expertise
- Quarterly CRO retainer option
Operational discipline
- Staging stores and theme-promotion discipline
- Backup before every release
- App governance with named owners
- Documentation in your wiki, not theirs
- Care plans for after launch
On the call
Eight questions to ask every Shopify agency on your shortlist.
01
Show me a custom Shopify theme you've shipped — not a customized paid theme.
A senior Shopify agency will show hand-coded Liquid, OS 2.0 sections built specifically for the brand, and metafield-driven content patterns. If every portfolio site shares the same hero pattern, you're seeing paid-theme work.
02
How many apps does the average store you ship use?
Look for an answer in single digits — five to ten core apps. Higher counts indicate the agency builds with apps rather than into the theme. Ask which functions live in the theme vs. apps in their last three projects.
03
What is your Shopify Plus experience?
If you're considering Plus, ask for B2B, multi-store, or checkout extensibility references. Plus is a different ceiling and the wrong agency will overpromise.
04
How do you measure performance after launch?
Real-user CrUX, not Lighthouse. Per-template budgets. 30-day post-launch monitoring. If 'we'll install a speed app' is the answer, the agency hasn't done real performance work.
05
What does your CRO process look like?
Hypothesis-led, prioritized by ICE or PIE, instrumented before testing, reviewed monthly. If CRO is just 'we'll redesign the PDP,' that's design, not CRO.
06
Walk me through your migration playbook.
Pre-launch crawl, product/customer/order parity audit, redirect map, schema parity, 30-day SEO monitoring. Anything less is a ranking loss waiting to happen.
07
Who will I be talking to weekly during the build?
Get a name and a role. Account managers are fine; named senior engineers and designers in the loop are essential. Pitch-team / delivery-team divergence is a quality risk.
08
Can I talk to a client you launched 18+ months ago?
Senior Shopify agencies have multi-year relationships. If every reference is from the past six months, you're seeing only the honeymoon.
Frequently asked
Common questions when picking a Shopify agency.
Don't see the question you're holding? Send it to [email protected] and we'll answer the same day.
Continue reading
Where to go next
Shopify development services
Custom Shopify themes and replatforms.
Custom Shopify development
Hand-coded Liquid, OS 2.0.
Shopify Plus
B2B, multi-store, checkout extensibility.
How to choose a Shopify agency
Step-by-step framework.
Best WordPress agency
Same framework, WP side.
Hire Shopify developers
Dedicated and white-label.
Brief us
If the framework points at the kind of agency we are — let's talk.
A 30-minute call. We'll listen first, sketch the shape, and tell you the parts other agencies skip.