Engineering a Smarter B2B Platform: How Mills Ltd Replaced Magento with a Scalable, Multi-Portal Ecommerce Ecosystem

THE CLIENT

Mills

Mills Ltd, the largest independently owned, family-run supplier of specialist tooling and infrastructure products for the telecommunications and renewables sectors, migrated from Magento to Symphony Commerce in 2026 after outgrowing their ecommerce setup.

With over 100 years in business and now operating as a fourth-generation company, Mills has built a reputation for delivering bespoke tooling solutions across a catalogue of more than 7,000 products. Their range spans from essential hand tools to advanced test equipment and full fibre infrastructure components required to build end-to-end gigabit-capable networks. Operating as both a distributor and manufacturer, Mills provides a complete, end-to-end supply chain solution to its customers.

However, their previous Magento platform—comprised of a core brand site and a series of basic partner portals—had become increasingly difficult to manage and was no longer aligned with the complexity of their B2B operations.

Since partnering with Symphony Commerce, Mills Ltd now operates a modern, scalable ecommerce ecosystem that includes a dedicated brand site and multiple partner portals. This new setup supports advanced B2B workflows, improves operational efficiency, and delivers a significantly enhanced customer experience.

Challenges

Before moving to Symphony Commerce, Mills Ltd faced a number of technical and operational challenges that were limiting their ability to scale:

• Clunky and Inefficient Platform Architecture
  Performance issues and an ageing Magento setup made the platform difficult to manage, maintain, and scale effectively.
• Heavy Developer Dependency
  Routine updates such as catalogue changes, user management, and pricing adjustments required developer input, slowing down internal workflows and increasing costs.
• Inconsistent Agency Support
  Previous agency relationships lacked reliability and continuity, impacting delivery timelines and confidence in the platform’s future.
• Restrictive B2B Functionality
  The existing Magento B2B module lacked the flexibility needed to support complex customer requirements, limiting adoption across key accounts.
• Manual Workarounds Across Core Processes
  Account creation, catalogue assignment, pricing updates, and user management were handled manually—creating inefficiencies and increasing the risk of error.

Solutions

Symphony Commerce worked closely with Mills Ltd to design and deliver a future-ready ecommerce platform tailored to their complex B2B requirements and long-term growth strategy.

Key capabilities included:

• Dedicated Brand Site and Partner Portal Architecture
  A central brand website supported by multiple dedicated partner portals, each configured to meet the needs of specific customer groups.
• Advanced B2B Ecommerce Functionality
  Flexible tools to manage customer-specific catalogues, pricing structures, and permissions—ensuring each user sees only what is relevant to them.
• Custom User Roles and Hierarchies
  Sophisticated account structures allow businesses to control user access, including restricted pricing visibility, multi-level permissions, and administrative oversight.
• Order Approval Workflows and Spend Controls
  Configurable approval processes support both single and dual approval flows, with spend thresholds such as monthly limits by category or product—aligning with real-world procurement processes.
• Comprehensive Account and User Management
  Admin users can create and manage accounts, assign permissions, and oversee organisational structures with ease.
• Enhanced B2B Ordering Capabilities
• Bulk ordering via SKU
• Requisition lists for repeat purchases and structured ordering
• Manager-led ordering on behalf of users
• Cost centre allocation for internal tracking and reporting
• Secure Access with OTP Authentication
  One-time passcode login implemented for specific partner portals, ensuring secure and controlled access.
• Sage 200 ERP Integration
  Seamless integration with Sage 200 ensures accurate pricing, real-time stock visibility, and efficient data flow across systems.
• Modern, Intuitive User Experience
  A clean, responsive interface improves usability for both internal teams and external customers, supporting faster and more efficient ordering.

Expansion

With Symphony Commerce in place, Mills Ltd now operates a more connected, efficient, and scalable ecommerce ecosystem:

• Multi-Site Management
  Four fully integrated sites managed within a single platform, reducing complexity and improving control.
• Single Source of Truth
  Centralised product, pricing, and customer data ensures consistency across all sites and user groups.
• Operational Efficiency Through Automation
  Previously manual processes are now automated, reducing internal workload and improving accuracy.
• Future-Ready Infrastructure
  A flexible platform that can adapt to evolving B2B requirements, new customer segments, and continued growth.

Outcomes

All four sites were successfully delivered in just 67 days, providing Mills Ltd with a transformed ecommerce operation in a remarkably short timeframe.

Since launch, the business has:

• Reduced reliance on developers for day-to-day management
• Improved efficiency across account management and ordering workflows
• Delivered a more sophisticated, user-friendly B2B experience
• Enabled scalable partner portal growth with advanced controls and automation

With a robust ecommerce foundation now in place, Mills Ltd is well-positioned to support its expanding partner network and continue innovating within the telecommunications and renewables sectors.