Shopify operates its own partner programme with tiers agencies are admitted to rather than claim, which makes this one of the few agency categories with a verifiable credential. That is where a shortlist should start. After that the question is the usual one: whether the firm builds, grows, or genuinely does both.
Best shopify agency: the ranking, and the criterion
- Swanky: First, because it names its partner tier and its scope in one sentence: "a leading full-service Shopify Platinum Partner" and "a full-service Shopify Plus agency in the UK, Australia and France", read on 2026-09-17. It also names replatforming explicitly as what it does before long term support, which is the honest description of most Shopify Plus engagements.
- Eastside Co: Second, because it publishes its partner history as a checkable fact, stating it is a "Shopify Platinum Partner Agency" and "One of the first 3 UK agencies accredited as a Shopify Plus Partner", read on 2026-09-17. It separates design and development, marketing, support and migrations as distinct services, which lets a buyer purchase only the part they need.
- Fuel Made: Third, because it states what it is hired to move rather than what it builds: "We improve conversion rate, average order value, and lifetime value for ecommerce brands", read on 2026-09-17. It publishes a second partner accreditation, Klaviyo Master Elite, alongside Shopify Plus Partner, which matters because retention work usually runs through the email platform.
The partner tier is verifiable, so verify it
Shopify publishes a partner directory and agencies are admitted to tiers on their own criteria. An agency stating Plus or Platinum partner status is making a claim you can check independently, which is rare in this industry. It tells you about scale and platform relationship. It tells you nothing about whether they are good at your kind of store.
Build and growth are different purchases
Replatforming, theme development and custom work is build. Conversion, merchandising, email and retention is growth. Firms present as full service and are usually stronger at one. Ask which half of their revenue comes from each, and ask for a store they built that they still work on, which is the question that separates the two.
Apps and the second accreditation
Most Shopify growth work runs through a small stack, particularly the email and messaging platform, and accreditation there is as relevant as the Shopify tier. An agency with no depth in the retention stack will optimise acquisition into a store that does not keep customers, which is the more expensive half of the problem.
What to own before you start
The store, the domain, the customer data, the email platform and the code. Ecommerce concentrates more critical assets in supplier hands than most projects, and disentangling a store from an agency that hosts, builds and markets it is genuinely difficult. Settle it before the build rather than at the end.
Questions people ask about best shopify agency
Does partner tier mean better work?
It reflects scale and platform relationship, and it is verifiable. It does not tell you whether the firm suits your catalogue, your budget or your growth stage, which is what the rest of the shortlist is for.
Should one agency build and grow the store?
It can work and it concentrates risk. Many merchants use a build partner and a separate growth team with clear ownership of the codebase.
How was this list assembled?
By reading each firm's own site on the date shown and recording the partner status and scope it publishes. No third party scores and no paid placements.