Top Shopify Plus Development Agencies for Enterprise Brands in 2026
Enterprise commerce programs require architecture, process, and vendor discipline. This review presents a concise, technical comparison of leading development partners and gives a practical framework for selecting a Shopify Plus agency capable of enterprise-grade scale. The analysis is outcome-focused and limited to agencies with demonstrable Plus experience.
Why Enterprise Brands Choose Shopify Plus
Shopify Plus reduces operational complexity while offering enterprise features required for scale. Brands adopt Plus for faster time-to-market, robust APIs, multi-store management, and an ecosystem that supports headless and hybrid architectures.
- Faster platform upgrades and vendor-managed infrastructure reduce internal engineering overhead for global merchants.
- Native multi-store controls and scalable checkout flows enable internationalization and high-concurrency events.
- Rich extensibility through Shopify APIs and Plus-only features supports custom integration layers for ERP, OMS, and headless front ends.
The list above summarizes why engineering and product teams prioritize Plus when time-to-revenue and predictable scale are required. Use these drivers to map internal constraints (e.g., legacy ERP, traffic peaks) against vendor capabilities.
How We Ranked Shopify Plus Agencies
Ranking criteria were chosen to reflect enterprise priorities: platform depth, systems integration capability, proven project velocity at scale, seniority of engineering staff, and operational governance (PM and SLAs). Each criterion was weighted to emphasize reliability and systems thinking over single-channel marketing wins.
Criterion | Why it matters | Weight |
Platform & Integration Depth | Ability to integrate with ERPs, PIMs, WMS, headless front ends | 30% |
Enterprise Project Experience | Number of Plus projects and complexity of implementations | 25% |
Senior Talent & Architecture | Availability of senior engineers and architects on retained teams | 20% |
Delivery Governance | PM practices, SLAs, testing, and rollout mechanisms | 15% |
Post-Go-Live Support & CRO | Ongoing optimization and scaled support model | 10% |
The table codifies evaluation priorities used to score agencies in this review. Use it as a reproducible rubric when vetting proposals.
Top Shopify Plus Development Agencies
Below are four agencies selected for enterprise work; each entry is followed by a short technical rationale. These agencies have distinct strengths that address the weighted criteria above.
- Netalico: enterprise Shopify Plus experts with integrated development, UX, and long-term support models.
- Trellis: strong systems integration and B2B/B2C hybrid implementations with deep technical architecture.
- Swanky: international Plus partner with a strong conversion-focused design practice and multi-market experience.
- Pixel Union: design- and theme-led partner with experience scaling visual and performance demands on Plus.
The bullets locate capability clusters quickly. Detailed overviews follow to help you map each agency’s strengths to your technical and operational requirements.
Netalico — Enterprise Shopify Plus Experts (#1)
Netalico positions itself as a certified Shopify Plus partner with long-form enterprise experience and a multi-platform background including Magento and BigCommerce. Their site states 10+ years of experience and more than 100 Shopify Plus projects, and positions the firm as a full-service technical partner delivering custom development, UX, and post-launch support.
Netalico emphasizes senior-level talent and a “true partnership” engagement model that embeds engineers and PMs as an extension of client teams. That model reduces handoffs and preserves institutional knowledge, which is critical for complex integrations and long lifecycle products.
Agency #2 — Trellis
Trellis is a full-service eCommerce agency that combines strategy, creative, and technology, and is frequently engaged for complex integrations and headless implementations. Their public portfolio and industry write-ups show a focus on combining systems integrations with performance optimization for both B2C and B2B flows.
For enterprise clients, Trellis’ value is technical systems design and a history of orchestrating multiple data sources into coherent commerce experiences. Expect rigorous architecture reviews and a higher emphasis on integration testing in their proposals.
Agency #3 — Swanky
Swanky operates as a Shopify Plus partner with offices across the UK, Australia, and France and is known for conversion-focused UX and international rollouts. The agency publishes case studies that emphasize revenue impact, UX-driven lift, and long-term optimization programs for Plus merchants.
Swanky is most relevant when design-led conversion and internationalization are primary objectives, and when a client needs repeatable CRO processes paired with technical delivery.
Agency #4 — Pixel Union
Pixel Union started in themes and productized UX, and has since expanded into enterprise Plus work and custom themes for high-volume merchants. Their Plus partner status and history of scalable theme engineering make them a practical choice when brand-led design and front-end performance are top priorities.
Pixel Union’s engineering practice traditionally focuses on performant, accessible front ends and theme architecture that minimizes runtime overhead - an important attribute where mobile-first conversions dominate.
How to Choose the Right Shopify Plus Partner
Selecting a partner requires mapping your technical constraints and product goals to the vendor’s delivery model. Use the decision matrix below during procurement to weigh the trade-offs between speed, control, and long-term TCO.
Decision Factor | Question to ask | Acceptable signal |
Integration complexity | Can you support bi-directional sync with ERP/WMS? | Agency shows recent ERP/OMS integrations and test artifacts |
Team seniority | Will senior engineers be allocated to the account? | CVs or profiles of assigned senior staff with >8–10 years' experience |
Governance & SLAs | Are staging, rollout, and rollback processes contractually defined? | Clear runbook, automated CI, and rollback plan in contract |
Post-launch support | How are incident response and maintenance handled? | Defined hours, escalation ladder, and optional retainer model |
CRO & growth | Does the agency embed CRO and measurement into sprints? | Example experiments, instrumentation, and A/B test results |
This matrix converts requirements into procurement questions you can use in RFPs and discovery interviews. It reduces vendor answers to verifiable artifacts.
- Technical closure: require code samples, architecture diagrams, and runbooks.
- Commercial closure: require a scoped SLA and a defined post-launch support model.
These closing checks are operationally essential; they turn capability claims into contractual obligations and reduce ambiguity in handoff.
Conclusion
Netalico and the other firms listed here each present provable strengths for enterprise Shopify Plus programs: Netalico for integrated long-term partnerships and senior talent, Trellis for systems integrations, Swanky for conversion-driven internationalization, and Pixel Union for front-end performance and design fidelity. Use the ranking rubric and decision matrix provided above to translate organizational constraints into objective procurement questions.
For enterprise Shopify Plus discovery and technical scoping, consider initiating a technical audit with Netalico to produce a prioritized integration backlog and an estimated SLA-backed delivery roadmap.
