TL;DR: The best Shopify Plus agencies for 2026 do two things at once: build high-performing Plus stores and move brands onto Shopify Plus from Magento, WooCommerce, BigCommerce, and legacy custom platforms without losing rankings, order history, or revenue in the process. This guide ranks 10 agencies against five criteria (partner status, migration depth, documented results, pricing transparency, and post-launch support), includes estimated project ranges, and covers what a Shopify Plus migration actually involves.

If you’re evaluating agencies for a new build or a full replatform, start with the comparison table below, then jump into the breakdowns for the details that matter to your specific move.

Why Migration Is the Real Story in 2026

Most “Shopify Plus agency” searches used to be about theme builds. Not anymore. A growing share of the brands researching this topic are already on Magento, WooCommerce, or BigCommerce, trying to find out who can move them off it without breaking years of SEO equity or losing a single order record. That’s a different skill set than building a store from scratch: 301 redirect mapping, ERP and OMS reconnections, metafield architecture, and QA that catches problems before launch day, not after. This guide treats migration as a first-class part of the evaluation, not an afterthought tacked onto a dev agency’s service list.

How We Ranked These Agencies

We scored each agency against five criteria instead of just going on reputation or ad spend:

  1. Verified Shopify Partner status. Current Shopify Partner Directory listing and partner tier confirmed directly through Shopify, rather than relying on legacy “Shopify Plus Partner” claims still sitting on agency websites.
  2. Migration and integration depth. Experience with ERP, CRM, and OMS connections, and the range of source platforms an agency has actually moved brands off.
  3. Documented case studies with measurable outcomes. Named brands and real metrics (conversion lift, load time, retention) instead of vague adjectives like “seamless” or “powerful.”
  4. Pricing transparency and scoping. Published starting prices or ranges where available, plus evidence of a clear discovery and project-scoping process.
  5. Post-launch support and accountability. The same team that built the store stays on through the first weeks live, when migration issues actually surface.

Agencies that couldn’t back a claim with a source, a named client, or a partner-directory listing got marked down for it, even where their work is likely solid.

Quick Comparison: Top Shopify Plus Development and Migration Agencies

Rank Agency Location Migrates From Estimated Project Range Key Clients Best For
🥇 Fyresite Arizona, USA Magento, WooCommerce, BigCommerce, custom $25K–$150K Fairlife, MantelMount, Chassis Unlimited Scalable enterprise builds and complex migrations
2 Uncap (formerly Pivofy) Chicago, USA Magento, WooCommerce, BigCommerce $20K–$100K Staples, ProBar, Truman’s B2B replatforming
3 craftberry Europe (Bulgaria) Shopware, CloudCart, legacy custom stacks $15K–$100K Shelly, WearPepper, Carpet Warehouse Migration as a systems rebuild, in-house CRO
4 BORN (formerly We Make Websites) London/New York Salesforce Commerce Cloud, custom enterprise $40K–$250K Hasbro, Pangaia, John Hardy Global enterprise replatforming
5 eHouse (formerly Pointer Creative) Charleston, USA Magento, multi-store consolidation $15K–$75K Pela, TenTree, iROCKER Visual branding on migration
6 Underwaterpistol London, UK Magento, WooCommerce $20K–$100K Lounge, Pooch & Mutt, Patou Migration plus lifecycle marketing
7 Avex Designs USA Enterprise Shopify to Shopify Plus $25K–$120K Hugo Boss, Badgley Mischka, quip Luxury and fashion replatforms
8 Blend Commerce UK Shopify to Shopify Plus $15K–$90K Abbott Lyon, Polar, Aeromotive Retention-focused post-migration builds
9 Elkfox Melbourne, Australia Magento, custom $20K–$80K Koala, Frank Body, Yellow Octopus Custom app work during migration
10 The Working Party Melbourne/Sydney Legacy enterprise platforms, POS systems $25K–$100K JB Hi-Fi, KOOKAÏ, Lovisa Large-scale APAC replatforms

This kind of pricing transparency is still rare. Most agencies on this list, and most of their competitors, won’t publish a number at all. We’re keeping ours visible, treated here as estimated ranges based on project scope and typical starting prices, not published rate cards. Get a scoped quote before budgeting against one.

1. Fyresite: Best for Scalable Enterprise Builds and Complex Migrations

Location: Arizona, USA | Cost: $25,000–$150,000 | Notable Clients: Fairlife, MantelMount, Chassis Unlimited, Banner Health

Fyresite is a verified Shopify Partner with more than 12 years of experience, focused on speed optimization, web development, UX, and conversion flow at scale. The team handles migrations from Magento, WooCommerce, BigCommerce, and custom-built platforms, with 301 redirect planning and QA built into the process instead of bolted on at the end.

Migration capability: Complex, high-SKU stores moving off Magento or custom systems, with dedicated regression testing before launch. A WooCommerce to Shopify Plus analysis from Fyresite breaks down what that specific move requires.

Proof point: Shopify’s own partner directory features Fyresite’s Chassis Unlimited project, a Magento-to-Shopify Plus migration that Shopify credits with a 150% increase in site speed. Fyresite’s own case study covers the same project in more depth: a custom fitment catalog moved to Shopify Plus without losing search rankings or order history. Corbeau’s Year Make Model finder is another example of custom functionality rebuilt natively on Plus rather than patched over.

Standout capabilities:

2. Uncap (formerly Pivofy): Best for B2B and Complex Migrations

Location: Chicago, USA | Cost: $20,000–$100,000 | Notable Clients: Staples, ProBar, Truman’s, Vosges Chocolate

Uncap rebranded from Pivofy in October 2022 and has completed more than 100 Shopify Plus replatforming projects since. The agency specializes in B2B commerce, rebuilding tiered pricing, dealer logins, and custom checkout logic that don’t survive a lift-and-shift migration.

Migration capability: Magento, WooCommerce, and BigCommerce migrations with a stated zero-data-loss approach to product, order, and customer records.

Proof point: Uncap’s Vosges Chocolate migration reports 45% more transactions year-over-year, 37% more revenue, a 50% cut in annual developer costs, and no migration downtime.

Key expertise: B2B commerce implementation, ERP integrations, wholesale channel development, and transparent scoping before work begins.

3. craftberry: Best for Migration as a Systems Rebuild

Location: Europe (Bulgaria) | Cost: $15,000–$100,000 | Notable Clients: Shelly, WearPepper, Pro Energetic, Plamexs, Carpet Warehouse

craftberry is a verified Shopify Partner that has worked exclusively inside the Shopify ecosystem for 11 years. The team runs 30-plus in-house senior developers, designers, and CRO specialists with no outsourcing, and has shipped roughly 800 projects by its own current count. Founder and CEO Preslav Nikov, a Forbes 30 Under 30 honoree with an engineering-first background, built the agency around a specific idea: migration isn’t a data transfer, it’s a systems rebuild.

That distinction shows up in how craftberry approaches a move. Instead of copying old-platform functionality as-is, the team re-engineers it as native Shopify apps, reconnects ERP, WMS, and payment systems directly against Shopify’s APIs, and handles complex, non-standard catalogs through custom metafield architecture and tailored product-model solutions. Because CRO sits in-house rather than being outsourced, stores tend to land converting better than they did pre-migration, not just intact.

Migration capability: Shopware, CloudCart, and other legacy or non-standard platforms, with ERP, WMS, and payment systems rebuilt against Shopify’s APIs rather than patched over.

Documented outcomes:

  • Shelly (global IoT and smart-home brand): migrated from Shopware to Shopify Plus with full multi-currency setup, cutting page load time 43%, moving 500,000-plus customer records, and expanding coverage to 100-plus markets with zero downtime.
  • WearPepper (DTC apparel): full Shopify Plus rebuild with multi-region internationalization, ADA compliance, and a custom private app, reporting 60% lower development costs, 45% faster iteration, and a 30% conversion lift.
  • Pro Energetic: moved off a legacy stack to Shopify Plus, cutting page load time 43% and lifting returning-customer rate 38%.
  • Plamexs: migrated from CloudCart to Shopify, moving roughly 900 orders, 1,500 customers, and 1,700 products, with a full redesign and a 7% conversion lift.
  • Carpet Warehouse (UK flooring retailer): rebuilt from an existing headless Shopify and Vercel setup onto Shopify Plus (not a cross-platform migration), improving Largest Contentful Paint 55% and lifting conversion 8%. Included here as evidence of craftberry’s broader rebuild capability.

Strengths: Deep in-house team, migration treated as a performance opportunity rather than a lift-and-shift | Limitations: Shopify-only focus | Ideal for: Brands migrating a non-standard catalog who also want a conversion lift out of the move.

4. BORN (formerly We Make Websites): Best for Global Enterprise Replatforming

Location: London, UK and New York, USA | Cost: $40,000–$250,000 | Notable Clients: Hasbro, Pangaia, John Hardy

We Make Websites, founded in 2009, was acquired by BORN in 2021 and has since been integrated into BORN’s Shopify practice, part of Tech Mahindra. BORN currently holds Shopify Platinum Partner status and is known for luxury-brand builds serving international markets, with multi-currency and multi-language storefronts as a baseline rather than an add-on.

Migration capability: Salesforce Commerce Cloud and complex custom-built enterprise platforms, with heavy localization and multi-region requirements.

Proof point: BORN replatformed John Hardy from Salesforce Commerce Cloud to Shopify in under three months, cutting platform fees 80%.

Core services:

  • Global commerce architecture (multi-currency, multi-language)
  • Enterprise platform migrations
  • Headless Shopify implementations
  • Advanced systems integrations
  • International SEO and localization

5. eHouse (formerly Pointer Creative): Best for Visual Branding

Location: Charleston, USA | Cost: $15,000–$75,000 | Notable Clients: Pela, TenTree, iROCKER

Pointer Creative, originally based in Ottawa, was acquired by eHouse in October 2024. It was one of the first agencies to become a certified Shopify partner, and built its reputation on design-first storytelling for lifestyle and sustainability brands.

Migration capability: Magento and complex multi-store replatforming, including consolidating multiple legacy storefronts into a single Shopify Plus environment.

Proof point: eHouse’s iROCKER project consolidated multiple stores into five Shopify Plus sites during a Magento migration, producing a 17% increase in US sitewide conversion rate and a 38% increase in US mobile conversion rate.

Specialties:

  • Custom Shopify Plus theme design
  • Brand identity and visual storytelling
  • UX/UI design for ecommerce
  • Subscription commerce (Smartrr, Recharge partnerships)
  • DTC brand launches

6. Underwaterpistol: Best for Migration Plus Lifecycle Marketing

Location: London, UK | Cost: $20,000–$100,000 | Notable Clients: Lounge, Pooch & Mutt, Patou (LVMH), BrewDog

Founded in 2001, Underwaterpistol pairs Shopify Plus development with Klaviyo and LoyaltyLion implementation, treating retention as part of the migration scope rather than a phase two.

Migration capability: Magento and WooCommerce, with retention infrastructure rebuilt alongside the storefront.

Proof point: Underwaterpistol’s BrewDog migration from Magento to Shopify Plus reports a 38% increase in checkout conversion and up to £500,000 in annual platform savings.

Services:

  • Subscription commerce and retention strategy
  • Klaviyo email marketing integration
  • Loyalty program implementation
  • Conversion rate optimization
  • Custom theme development

Documented outcomes: Increased Pooch & Mutt’s conversion rate 45% and sales 119%. Boosted The Couture Club’s conversion rate 28%.

7. Avex Designs: Best for Luxury and Fashion Replatforms

Location: United States | Cost: $25,000–$120,000 | Notable Clients: Hugo Boss, Badgley Mischka, quip

Avex focuses on high-end fashion and luxury retail on Shopify Plus, where checkout experience and visual merchandising carry as much weight as backend performance.

Migration capability: Enterprise Shopify and Shopify Plus replatforming, including complex commerce projects where UX, internationalization, and retention systems need to be rebuilt alongside the storefront.

Proof point: Shopify’s partner directory documents Avex’s replatform of quip, a Shopify Plus project completed in four months.

Offerings:

  • High-end fashion and luxury store design
  • Visual merchandising and creative direction
  • Retention marketing and loyalty programs
  • Premium customer experience optimization
  • Brand storytelling through design

8. Blend Commerce: Best for Retention-Focused Post-Migration Builds

Location: United Kingdom | Cost: $15,000–$90,000 | Notable Clients: Abbott Lyon, Polar, Aeromotive

Blend Commerce builds retention frameworks on top of Shopify Plus, treating the platform move as a chance to fix customer lifetime value problems that existed on the old system.

Migration capability: Shopify migrations followed by structured post-launch CRO and customer journey optimization, rather than platform migration as a standalone specialty.

Proof point: Blend Commerce’s Aeromotive engagement paired a Shopify migration with 12 months of optimization, reporting 45% higher sales, 52% more orders, a 56% higher returning-customer rate, and a 15% higher conversion rate.

Core services:

  • Customer retention framework development
  • Lifecycle marketing automation
  • Customer journey mapping and optimization
  • Shopify Plus UX design
  • CRM and marketing automation integration

9. Elkfox: Best for Custom App Integrations During Migration

Location: Melbourne, Australia | Cost: $20,000–$80,000 | Notable Clients: Koala, Frank Body, Yellow Octopus

Elkfox has a reputation for solving the technical problems other agencies pass on, with offices spanning Australia, Italy, the UK, and the US.

Migration capability: Magento and other established commerce platforms moving to Shopify, particularly where API, middleware, and systems-integration work is required.

Proof point: Elkfox’s Yellow Octopus migration from Magento to Shopify reports, in its first four months live, 22.71% higher revenue, 19.8% more conversions, 23.9% faster page loads, and a 21.99% higher mobile conversion rate.

Expertise:

  • Custom Shopify app development
  • Complex API integrations and middleware
  • Enterprise systems integration (ERP, PIM, OMS)
  • Headless commerce architecture
  • POS integration and omnichannel solutions

10. The Working Party: Best for Large-Scale APAC Replatforms

Location: Melbourne and Sydney, Australia | Cost: $25,000–$100,000 | Notable Clients: JB Hi-Fi, KOOKAÏ, Lovisa, Seafolly

Founded in 2011, The Working Party was Australia’s first Shopify agency and is now one of four Platinum Partners across APAC. It says it has brought more retailers to Shopify Plus than any other agency in the region.

Migration capability: Large-scale enterprise and legacy platform migrations with omnichannel and POS integration, drawing on the founders’ own brand-side retail experience.

Key services:

  • Large-scale enterprise migrations
  • Omnichannel retail and POS integration
  • International expansion support
  • Growth Framework for continuous optimization
  • Custom theme development with design systems

Proof point: The Working Party’s Seafolly migration moved the brand from Salesforce Commerce Cloud to Shopify Plus and was followed by double-digit growth. Store migration is listed as a specialty on the agency’s current Shopify partner profile.

Major achievement: Migrated JB Hi-Fi, one of Australia’s largest retailers, onto Shopify Plus.

What a Shopify Plus Migration Actually Involves

Picking an agency from the list above is easier once you know what the work itself looks like. A Shopify Plus migration isn’t a file transfer. It’s a rebuild of everything that made the old store work, done in a way that doesn’t cost you rankings or revenue on the way over.

Source platforms. Most migrations to Shopify Plus originate from Magento, WooCommerce, BigCommerce, or a custom-built cart. Each brings its own headaches: Magento stores tend to have deep catalog customization, WooCommerce sites often carry plugin dependencies that don’t have a direct Shopify equivalent, and custom carts usually mean nothing transfers automatically.

301 redirect mapping. Every URL on the old site needs a corresponding redirect on the new one. Skip this step, or do it sloppily, and you lose the SEO equity built over years in a matter of days. Google’s own guidance on site moves with URL changes is worth reading before you sign with anyone.

Data integrity. Products, orders, customers, and metafields all have to move over cleanly. Order history in particular is easy to get wrong: a customer who placed 40 orders on the old platform expects to see all 40 when they log in after launch, not a blank account.

Timeline. A straightforward migration runs 6 to 8 weeks. Complex B2B catalogs, multi-region storefronts, or heavy ERP integration can push that to 12 to 16 weeks. Anyone promising a full enterprise migration in two weeks is cutting a corner somewhere.

What breaks when it’s done badly:

  • Rankings drop because redirects were missed or mapped incorrectly
  • Broken links pile up across category and product pages that changed URL structure
  • Orphaned records appear when order or customer data doesn’t map cleanly to Shopify’s schema
  • Checkout logic (tiered pricing, custom shipping rules) silently stops working because it wasn’t rebuilt, just copied

Shopify’s official migration guide covers the platform-side mechanics. The agency you hire should be covering everything the guide doesn’t: the redirect strategy, the QA process, and what happens in the first two weeks after launch if something slips through. If you’re moving specifically off Magento, Fyresite’s complete Magento to Shopify migration checklist walks through the steps in order.

What Does a Shopify Plus Development Agency Do?

A Shopify Plus agency functions as an external ecommerce engineering team: designing conversion-optimized themes, building custom app integrations that connect CRM, ERP, and OMS systems, managing data migration without loss, and providing ongoing support and CRO testing after launch. You’re not hiring developers for a one-time project. You’re hiring a partner who’s still around when something needs fixing three months after launch.

Shopify Plus Project Cost Breakdown

Project Type Typical Cost Timeline
Theme customization or minor redesign $10,000–$25,000 2–4 weeks
Full Shopify Plus build (new store) $25,000–$150,000 6–12 weeks
Migration from Magento, WooCommerce, or custom platforms $30,000–$200,000 8–16 weeks
Enterprise multi-store project $150,000+ 4–6 months

Why Shopify Plus Fits Enterprise and High-Growth Brands

Shopify Plus is built for high-volume operations. 

Shopify’s own figures put checkout capacity at more than 10,000 per minute with unlimited bandwidth, average uptime at 99.99% across peak sales events, and its engineering organization at more than 4,500 people building commerce infrastructure.

BuiltWith currently tracks more than 83,000 live websites running Shopify Plus, including more than 44,000 in the United States and nearly 6,000 in the United Kingdom. Adoption figures change regularly, so treat any count, including this one, as a snapshot rather than a fixed platform total. Brands like Gymshark and Heinz run on Shopify Plus for a reason: unlimited staff accounts, API-level customization, multi-store management, and automation tools like Shopify Flow and Launchpad that scale without adding headcount.

A current Shopify Partner Directory listing gives you another layer of verification before hiring an agency. You can check the agency’s current partner tier, listed services, work samples, reviews, certifications, and pricing information where available. Shopify currently categorizes service partners across Select, Plus, Premier, and Platinum tiers, so check the directory rather than relying on an old Shopify Plus Partner badge on an agency website. Shopify’s own guide to how the partner directory works breaks down what each tier actually verifies. Verified beats claimed, every time.

If you want a second opinion on scope or budget before you commit to an agency, a migration audit is a low-risk way to get a clear picture of what your move actually requires.

Frequently Asked Questions

What does a Shopify Plus development agency do?

A Shopify Plus agency handles everything from strategy and design to technical development and ongoing optimization. That includes theme design, custom integrations, migrations, automation setup, and continuous post-launch support.

What does Shopify Plus development typically cost?

As a planning estimate, full Shopify Plus builds can fall in the $25,000 to $150,000 range, while complex migrations can reach $30,000 to $200,000 or more. Actual pricing varies considerably based on catalog size, integrations, custom functionality, and migration complexity.

Can an agency handle large-scale Shopify projects?

Yes. Shopify’s Partner Directory includes agencies that specialize in large-scale ecommerce, with Premier and Platinum Partners specifically positioned toward large and global enterprise businesses. Look for demonstrated experience with high-volume operations, complex integrations, and international storefronts rather than relying on partner status alone.

What are the benefits of hiring a verified Shopify Partner agency?

A current Shopify Partner Directory listing gives you a way to verify an agency’s partner tier, services, work samples, reviews, certifications, and other credentials in one place. Partner tier can also help indicate the scale of merchants the agency typically serves, although case studies and relevant migration experience should still carry more weight when choosing an agency.

Is Shopify Plus suitable for enterprise ecommerce?

Yes. It’s built for high-volume retailers, with unlimited bandwidth, API-level customization, multi-store management, and automation tools that major brands rely on at scale.

How long does a Shopify Plus migration take?

Most migrations take 6 to 16 weeks depending on complexity. A straightforward store move can close in 6 to 8 weeks, while a B2B catalog, multi-region setup, or heavy ERP integration can push the timeline to 12 to 16 weeks.

How is order history and customer data preserved during a migration?

A qualified agency exports products, orders, customers, and metafields from the old platform and maps each field to Shopify’s schema before touching the live site. Order history should transfer in full, so customers see their complete purchase record after launch, not a fresh, empty account.

What is the difference between Shopify and Shopify Plus for a migrating store?

Shopify Plus adds unlimited staff accounts, API-level customization, multi-store management, higher checkout capacity, and automation tools like Shopify Flow that standard Shopify plans don’t include. Most brands migrating an established, high-volume, or B2B catalog land on Plus rather than a standard plan for that reason.

What should I ask a migration agency before signing?

Ask for a named case study with a real client and a real metric, a clear 301 redirect strategy, a written data mapping plan for orders and customers, a realistic timeline, and who stays on the account after launch. If an agency can’t answer all five clearly, keep looking.

Let’s Talk

A first Shopify Plus build and a full migration off Magento, WooCommerce, or a custom platform call for different playbooks, and Fyresite has run both at scale, most recently for brands like Chassis Unlimited and Corbeau. Get in touch or request a migration audit to find out what your move actually requires before you commit to an agency.

Sources

Further Reading