Top Shopify Plus Agencies in 2026 (and How to Choose the Right One)

Last reviewed June 2026. A Shopify Plus agency handles the complex, high-stakes work that standard Shopify builds rarely need: enterprise migrations, custom checkout, ERP and PIM integrations, B2B commerce, and high-traffic performance. Below are nine of the strongest Plus specialists in our directory, spanning North America, the UK, and Australia, each with what they do best — followed by how to choose the right one for your project.

A note on how this list was built: these agencies were selected from our directory of 900+ verified agencies, filtered for genuine Shopify Plus specialization and sorted by client rating and review volume. It is a curated shortlist, not a paid ranking, and it is grouped by strength rather than ranked one-to-nine — the "best" agency depends entirely on your project.

What Makes a Great Shopify Plus Agency

Before the list, know what you are actually looking for. The agencies worth your shortlist tend to share these traits:

• Genuine Plus experience — not just Shopify work, but launched and scaled Plus stores specifically
• Integration depth — proven ERP, PIM, 3PL, and CRM integrations, which is where enterprise builds get hard
• A track record at your scale — case studies matching your order volume, catalog size, and complexity
• Relevant vertical experience — B2B, fashion, subscriptions, or whatever your model demands
• Strong post-launch support — Plus stores are living systems that need ongoing development, not a one-off build
• A real team — enough people that your project does not stall when one developer is on leave

The Top Shopify Plus Agencies in 2026

Diff Agency — Montreal, Canada

One of North America's best-known Shopify Plus agencies, Diff pairs a 100-plus-person team with a strong focus on growth strategy, integrations, and CRO. Founded in 2011 and rated 4.8 across 57 reviews, they are a natural fit for ambitious brands that want strategy and technology under one roof. Best for: enterprise growth and complex integrations.

We Make Websites — London, UK

A global Shopify Plus agency building premium experiences for fashion, beauty, and lifestyle brands, with headless expertise on tap. Founded in 2012 and rated 4.9 across 44 reviews, they are a strong pick where brand and design polish are the priority. Best for: premium fashion, beauty, and luxury brands.

Arctic Grey — New York, USA

A top-rated US Plus agency building enterprise-grade custom stores with a focus on performance and scalability. Founded in 2014 and rated 4.9 across 36 reviews, with specialisms in custom apps and ERP integration. Best for: custom app development and ERP-heavy enterprise builds.

Velstar — Liverpool, UK

An award-winning Shopify Plus agency focused on helping D2C brands scale through growth strategy, UX design, and CRO. Founded in 2016 and rated 4.9 across 38 reviews. Best for: direct-to-consumer growth and conversion optimization.

Swanky — Exeter, UK

Shopify Plus experts helping enterprise brands migrate, launch, and scale, with particular strength in complex B2C and B2B commerce. Founded in 2013 and rated 4.8 across 33 reviews. Best for: B2B commerce and enterprise migrations.

Eastside Co — Birmingham, UK

One of the UK's leading Shopify agencies, combining Plus development with app development and ecommerce strategy. Founded in 2012 and rated 4.7 across 61 reviews — one of the deeper review records on this list. Best for: app development and strategy-led builds.

Commerce Pundit — Atlanta, USA

A full-service Shopify agency offering end-to-end development, marketing, and managed ecommerce. Founded in 2010 and rated 4.6 across 74 reviews — the largest review count featured here. Best for: brands wanting development and marketing managed together.

Absolute Web — Miami, USA

A Miami-based agency with more than two decades of ecommerce experience building custom, high-converting Plus stores with deep integration work. Founded in 1999 and rated 4.7 across 48 reviews. Best for: complex custom development and integrations.

Reload Digital — Sydney, Australia

An Australian Shopify Plus agency combining strategy, design, and development to help brands grow in the APAC market and beyond. Founded in 2014 and rated 4.8 across 27 reviews. Best for: strategy-led growth and APAC-based brands.

How to Choose Between Them

Once you have a shortlist, the selection process matters as much as the list itself. Request proposals from three to five agencies, send them all the same detailed brief so the quotes are comparable, and watch for the warning signs that separate a safe partner from a risky one.

What It Costs to Work With a Shopify Plus Agency

Plus projects sit at the higher end of agency pricing. A Plus build typically runs from $50,000 to $250,000 or more depending on complexity, integrations, and whether the work is theme-based or fully custom, with ongoing retainers common after launch. Budget for the full engagement, not just the build.

Frequently Asked Questions

The Bottom Line

Any of the agencies above can deliver an excellent Shopify Plus project — the question is fit. Match the agency's strengths to your model, scale, and vertical, then run a proper selection process with a clear brief and comparable proposals. The right partner is the one whose experience maps to your project, not simply the one with the highest star rating.