Between January and March 2026, our research team evaluated the top Shopify Plus agencies across North America, Europe, and Australia. We weighted six key criteria: Proprietary Technology & Platform Mastery (25%), Enterprise B2B Transformation Experience (20%), ERP Integration Sophistication (18%), Custom Development Capabilities (15%), Client Retention & Partnership Quality (12%), and Customer Satisfaction & Reviews (10%).
We prioritized agencies delivering complex multi-system B2B transformations with proprietary integration platforms. Standard migrations and basic API connections ranked lower, regardless of project volume. Below, you’ll find our definitive comparison based on transformation sophistication, proven enterprise outcomes, and technical innovation.
The Top Shopify Plus Agencies
| Rank | 1 | 2 | 3 | 4 | 5 | 6 |
|---|---|---|---|---|---|---|
| Agency | Atwix | Folio3 Ecommerce | FYRESITE | Techtic Solutions | Guidance | Uncap |
| Shopify Experience | 7+ years, 5+ Shopify certs | 7+ years certified | 15+ years, Shopify Plus Partner since 2022 | Shopify Plus Partner | Shopify Plus Partner | 13 years Shopify partner |
| Enterprise B2B Experience | 180+ B2B implementations | 150+ B2B and B2C projects | 50+ enterprise projects | 200+ brand implementations | 1500+ total implementations | 380+ total projects |
| ERP Integration Capabilities | Proprietary Sirius platform | ERP/CRM/PIM integrations | Standard API connectivity | API/ERP integrations | Multi-system complexity | Basic connectivity |
| Custom Development | Advanced custom solutions | Headless & AI capabilities | Custom apps & integrations | Custom B2B development | Enterprise custom development | Migration-focused |
| Client Retention | ~96% | High retention | Strong retention | Strong retention | Long-term partnerships | Strong retention |
| Customer Reviews | 4.9/5.0 | 4.9/5.0 | 5.0/5.0 | 4.8/5.0 | No online rating score | 5.0/5.0 |
| Specialty | Complex B2B commerce transforma-tion | B2B wholesale enterprise solutions | Enterprise migration specialist | Fashion & lifestyle B2B | Enterprise strategy & consulting | Wholesale migration specialist |
The Top Shopify Plus Agencies by Specialty
Enterprise B2B Commerce & Complex Integrations
- Atwix – Proprietary Sirius platform, 150+ B2B implementations, 96%+ retention
- Folio3 Ecommerce – Comprehensive ERP/CRM/PIM integration capabilities
- FYRESITE – Zero-downtime enterprise migration expertise
Enterprise Migration & Platform Replatforming
- FYRESITE – Zero-downtime migration guarantee, data integrity focus
- Atwix – Complex multi-system migration experience
- Folio3 Ecommerce – Seamless platform transitions with AI integration
Technical Platform Mastery & Innovation
- Atwix – Proprietary Sirius platform, custom development, headless commerce
- Folio3 Ecommerce – AI-powered features, headless architecture
- Techtic Solutions – Custom B2B development and automation
In-Depth Agency Reviews
Atwix, for Enterprise B2B Commerce Transformations
BEST FOR: Manufacturers, distributors, and industrial businesses requiring sophisticated ERP integration and complex B2B pricing workflows
Since 2006, Atwix has specialized in B2B commerce that requires real expertise: manufacturers with 50,000+ SKUs, distributors managing customer-specific pricing for hundreds of accounts, and industrial suppliers syncing inventory across multiple ERPs in real-time. Its proprietary Sirius integration platform eliminates the biggest bottleneck: ERP integration. Instead of spending 4-6 months and $100K+ building custom connections from scratch, Sirius provides pre-built, tested connectors for P21, Salesforce, Expertek, Kodaris, Infor, SAP, and NetSuite. You can go live in weeks instead of months, with significantly lower integration costs. With 200+ certifications across its team and 96%+ client retention, companies like Wilson Sporting Goods, Sony Biotech, and Interior Define stay and expand its capabilities year after year.
Every project starts with comprehensive discovery workshops mapping your business processes and integration requirements. Implementation includes staging environment testing, comprehensive QA protocols, and rollback procedures. Post-launch support includes three tiers: Bronze (monitoring and security), Silver (monthly optimizations), and Gold (strategic consulting and priority support) with 24/7 availability across North America and Europe.
Services: Shopify Plus Development, Enterprise B2B Commerce, ERP/CRM Integration, Custom App Development, Platform Migration, Headless Commerce, 24/7 Support
What Clients Say:
- “True professionals” delivering “elegant solutions to complex problems”
- “Deep technical expertise and proactive project management”
- “Quick response times” with “fair and accurate project estimates”
Folio3 Ecommerce, for B2B Wholesale Enterprise Solutions
BEST FOR: Mid-market B2B businesses needing comprehensive wholesale functionality without premium agency pricing
Founded in 2005, Folio3 delivers enterprise-grade B2B commerce to growing mid-market businesses. It builds headless commerce solutions, implements AI-powered visual search and virtual try-on features, and develops native mobile apps. As official partners with Shopify Plus, Salesforce, NetSuite, and Dynamics 365, deep ERP/CRM/PIM integration comes standard. Serving 150+ brands globally with offices across North America, Europe, Asia, and Australia, it brings international ecommerce expertise to complex business requirements. Pricing ranges from $50K-$200K for enterprise B2B projects.
Its B2B specialization addresses customer-specific pricing, private buyer portals, bulk ordering workflows, and approval hierarchies. With 12+ years of building B2B ecommerce for manufacturers, wholesalers, and distributors, it has solved complex requirements dozens of times. Its approach emphasizes business goals over technical complexity, focusing on solutions that align with your larger business objectives rather than just technical execution.
Services: B2B Shopify Plus Development, ERP/CRM/PIM Integration, Headless Commerce, AI-Powered Features, Custom App Development, Migration Services
What Clients Say:
- “Professional and organized approach” with “stellar work quality”
- Handles “complicated projects with intricate customizations”
- “Effective solutions and responsive turnaround times”
FYRESITE, for Enterprise Migration Specialists
BEST FOR: Businesses migrating from legacy platforms that can’t afford downtime or data loss during transition
Founded in 2009, FYRESITE became Arizona’s first Shopify Plus partner in January 2022 and specializes in complex platform migrations from Magento, WooCommerce, BigCommerce, and custom platforms. Over 15 years of experience means the agency has seen every migration disaster and built processes to prevent them. The results: a perfect 5.0/5.0 rating across 37 verified Clutch reviews with projects ranging $25K-$150K.
Your business doesn’t stop during migration. FYRESITE executes seamless transitions preserving business functionality across retail, marketing, travel, and nonprofit sectors. Beyond migration, the agency delivers end-to-end Shopify Plus builds, custom app development, ERP integration, and UX optimization focused on checkout conversion. Clients value transparent communication, responsive project management, and on-time, on-budget delivery with high-quality results.
Services: Platform Migration, Shopify Plus Development, Custom App Development, ERP/CRM Integration, Site Speed Optimization, UX Design
What Clients Say:
- “Seamless” migrations with “no more technical issues”
- Clients “felt like part of their team” with responsive communication
- Consistently “on time and on budget” with “high-quality” results
Techtic Solutions, for Fashion & Lifestyle B2B
BEST FOR: Fashion, home & garden, health & wellness, and food & beverage brands needing design-led B2B commerce
Founded in 2009 and a certified Shopify Plus Partner, Techtic has completed 200+ brand implementations across 500+ projects. Its sweet spot is brands where product presentation drives purchasing decisions, including fashion, retail, and food & beverage brands with complex product catalogs and visual requirements. Its design-led approach combines headless commerce, AI integration, and conversion rate optimization.
Its B2B capabilities handle customer-specific pricing, private storefronts, bulk ordering, and ERP/CRM connectivity while maintaining brand standards. The team’s design focus ensures B2B functionality doesn’t compromise brand aesthetics. With 29 verified Clutch reviews earning 4.8/5.0, clients consistently praise their timely delivery, communicative approach, and high-quality work.
Services: Shopify Plus Development, Headless Commerce, B2B Solutions, AI Integration, Custom Apps, ERP/CRM Integration, CRO
What Clients Say:
- “Strong technical expertise” and “great project management”
- “Quick and agile” with “timely delivery” and “high-quality work”
- “Communicative, helpful, and easy to work with”
Guidance, for Enterprise Strategy & Consulting
BEST FOR: Established brands with legacy systems needing experienced partners who understand enterprise complexity
Since 1993, Guidance has delivered world-class commerce solutions across Adobe Commerce (Magento), Optimizely, BigCommerce, and Shopify Plus. That’s 30 years of institutional knowledge serving automotive, fashion, health & beauty, food & beverage, and retail clients. Its Shopify Plus practice emphasizes enterprise-ready solutions and omnichannel experiences, with notable clients like K-Swiss, Hoonigan, and Relax the Back.
Its service model combines strategic planning, comprehensive ERP and CRM integrations, professional UI/UX design, and ongoing optimization through dedicated support teams. Perfect for brands transitioning from legacy platforms or consolidating multiple systems. Award-winning execution (IMA Best In Class, W3 Gold and Silver) centers on reducing total cost of ownership and accelerating time-to-market. Projects range $75K-$300K+, reflecting comprehensive enterprise implementations.
Services: Shopify Plus Development, Shopify Plus Migration, B2B/B2C Ecommerce, System Integration, Customer Experience, Web Development
What Clients Say:
- “Technical expertise enabled us to challenge the norm and build the brand experience”
- “Understands our culture and what we want to achieve”
- “Not all development partners are the same”
Uncap, for Wholesale Migration Specialists
BEST FOR: Mid-market B2B businesses needing straightforward wholesale migrations with transparent pricing
Operating as a Shopify partner since 2013, this Chicago-based agency has delivered 380+ ecommerce projects with laser focus on B2B and wholesale migrations to Shopify Plus. As a certified Shopify Platinum Partner, it specializes in porting complex legacy wholesale features, including dealer portals, tiered pricing, contract-based pricing rules, purchase order workflows, net payment terms, and account hierarchies, into scalable Shopify Plus architectures. Notable clients including ULE Group, Canon Medical Systems, and Vermont Woods Studios demonstrate its capability across diverse industries.
With a perfect 5.0/5.0 rating across 72 Clutch reviews, clients praise transparent communication, efficient project management, and ability to deliver on aggressive timelines. Clear cost structures ($25K-$60K for wholesale migrations) help you forecast investment and timeline with clarity. Its commitment to feature preservation means you’re gaining modern infrastructure while keeping the B2B workflows your team relies on daily.
Services: Shopify B2B Migration, Shopify Plus Implementation, Private Ordering Portals, ERP Integration, Custom App Development
What Clients Say:
- “Timely delivery” often completed “ahead of schedule”
- “Exceptional project management” serving as “an extension of our team”
- “Knowledgeable” professionals who “exceed expectations”
Selecting the Right Shopify Plus Agency
Among the top Shopify Plus agencies evaluated in our research, Atwix leads for manufacturers requiring proprietary ERP integration and complex B2B transformations, FYRESITE excels at zero-downtime migrations, Folio3 and Uncap deliver wholesale solutions at accessible price points, while Guidance brings three decades of multi-platform expertise.
Contact Atwix today to discuss how the Sirius platform and 150+ proven implementations can transform your enterprise commerce.