As the first in a new series, our Meet the Partner articles shine a spotlight on the partners within the Whistl Parcels integration ecosystem – from order management platforms and packaging specialists to eCommerce agencies and marketplaces.
This month, we’re speaking to Mark Mikkelson, Co-Founder of Shiptheory, a Bristol-based shipping automation platform designed to make delivery simpler, faster and smarter for online retailers.
Shiptheory is a team of experienced eCommerce, integration and shipping specialists focused on removing friction from fulfilment.
Their powerful shipping software allows retailers to automatically manage orders, print carrier labels and send tracking information in seconds – saving hours of manual work every day.
Shiptheory supports retailers across the globe, with teams based at their Bristol HQ in the UK and a growing presence in Miami, Florida.
Shiptheory was founded by James and Mark Mikkelson, who had spent years working in the eCommerce shipping space. After building one of the earliest Magento shipping integrations in the early 2000s and consulting for other platforms, they applied everything they’d learned to create their own solution.
Over the past seven years, Shiptheory has grown into one of the UK’s leading shipping management platforms within the eCommerce logistics space.
Based in Bristol, founders James and Mark lead a dedicated team of shipping and eCommerce experts who share a passion for customer satisfaction.
A standout feature of Shiptheory is its award-winning support team, which takes the time to understand every retailer’s operation. This hands-on approach to onboarding and account management has helped make Shiptheory one of the best-reviewed shipping solutions in the market.
Shiptheory supports merchants of all sizes across a wide range of sectors. From integrating into existing workflows to fully optimising shipping operations, the platform adapts to each retailer’s needs.
Customers include well-known brands such as PetShop.co.uk, Jimmy’s Iced Coffee, Barry M, Temple Cycles, Scrub Daddy and WoodBlocX, alongside thousands of growing eCommerce businesses. There’s no shortage of impressive Shiptheory case studies.
As retailers scale, they’re often forced to change processes to suit rigid systems. This can mean retraining staff and reworking established workflows.
Shiptheory takes a different approach. It eliminates manual tasks and fits around existing processes, rather than forcing retailers to change how they work.
Designed for flexibility, Shiptheory supports a wide range of operational scenarios including:
Barcode scanning
Pick-and-pack stations
Bulk and batch order processing
From order placement to delivery, Shiptheory can automate:
Shipment booking
Label printing
Tracking notifications
Returns management
Picking sheets
Shiptheory works with retailers of all sizes and integrates with over 60 sales channels and 100+ carriers.
The platform connects seamlessly with:
eCommerce platforms such as Shopify and WooCommerce
ERP systems like NetSuite, Brightpearl and Microsoft Dynamics
An open API also allows custom integrations for more complex operations.
At the heart of Shiptheory are Shipping Rules, which automatically route orders to the correct carrier and service based on retailer-defined logic.
These rules can trigger the creation of:
Shipping labels
Packing slips
Commercial invoices
International documentation
Carbon certification
Once a shipment is booked, tracking details are automatically sent back to the customer or originating platform.
Retailers can also automate printers and barcode scanners, enabling efficient pick-and-pack workflows in minutes.
Shiptheory’s inventory synchronisation ensures stock levels remain accurate across all channels, while its fully brandable returns portal allows retailers to define automated acceptance rules and collect additional information when needed.
Customer service sits at the heart of Shiptheory. The team goes above and beyond to ensure retailers get maximum value from the platform – a hands-on approach that sets them apart in a traditionally hands-off sector.
Every product decision, from carrier integrations to new features, is driven by customer feedback and real-world retail challenges.
Shiptheory is constantly evolving, with 40+ updates and enhancements released every month.
Recent and upcoming innovations include:
Green Shipping – automatic carbon offsetting for non-green deliveries
Penmanship – AI-generated handwritten notes to boost engagement and upsell opportunities
Inventory Management – real-time stock synchronisation
Returns – a fully configurable, brandable returns experience
Custom consumer tracking portal (launching soon)
Shiptheory has more carrier and channel integrations than any other UK provider. Their extensive partner ecosystem supports retailers using emerging marketplaces and new technologies.
A full list of integrations is available on the Shiptheory website.
Preparation is key. Retailers should:
Plan stock levels using historic data
Ensure websites can handle increased traffic
Set up back-up carriers in advance
This is where Whistl Parcels’ multi-carrier network adds real value, offering flexibility during peak demand or unexpected disruption.
Retailers should also have tools in place to capture customer feedback, such as automated review requests, to sustain momentum beyond peak periods.
Shiptheory partners with platforms and providers that deliver genuine value to its customers – and Whistl Parcels fits that perfectly.
With a trusted platform used by many shared customers, and a friendly, open and collaborative team, Whistl Parcels mirrors Shiptheory’s own customer-first approach. Close collaboration with carriers allows Shiptheory to better understand and serve retailer needs.
As a privately held company handling over 3.6 billion parcels, packets and mail items annually, Whistl Parcels offers scale, reliability and competitive pricing.
From a partnership perspective, the Whistl Parcels team has been responsive, supportive and quick to assist with any technical queries.
A multi-carrier approach is essential for growing retailers. It enables:
Faster delivery options
Support for D2C and wholesale models
Greater resilience against disruption such as strikes or supply chain issues
Having multiple carrier options in place protects both the retailer and the customer experience.
Customer service is Shiptheory’s defining strength. From onboarding to long-term support, the team is always on hand to help customers succeed.
Shiptheory has been described as “the benchmark for customer support” in Trustpilot reviews – a reputation they’re committed to maintaining as the business grows.
Shiptheory aims to become a cornerstone of retail operations, supporting everything from shipping and inventory to returns and customer loyalty.
With continued expansion into the United States, the ambition is clear: to become America’s favourite shipping automation platform, just as Shiptheory already is in the UK.
Both Shiptheory and Whistl Parcels share a focus on helping retailers save time and money. As new services and features are introduced on both sides, customers will continue to benefit from a stronger, more integrated partnership.
“We love working with Whistl Parcels – they set the standard for partnerships. Cooperative, customer-focused and easy to work with, our collaboration reinforces the customer-centric ethos of both companies.” – James Mikkelson, Co-Founder, Shiptheory
