Certified Shopify Plus experts & agency

Udundi is a Certified Shopify Plus Partner with over a decade of in-house expertise helping high-volume brands launch, scale, and push the boundaries of what Shopify Plus can do. From custom checkouts to complex integrations, we are the Plus-specialized team your brand needs.

Why enterprise brands choose Udundi for Shopify Plus

A Certified Shopify Plus Partner since before Plus was mainstream. Every metric below reflects in-house work by a team that has grown alongside the platform.

Years of Shopify Plus expertise

Custom Shopify themes built

Custom apps developed

Client satisfaction rate

Shopify Plus: built for brands that mean business

Shopify Plus is the enterprise tier of the Shopify ecosystem—built for high-volume merchants who have outgrown the constraints of standard Shopify plans. It unlocks fully customizable checkout flows, Plus-exclusive APIs, Shopify Flow automation, B2B and wholesale functionality, multi-store expansion storefronts, and access to a dedicated merchant success team. The question is not whether Shopify Plus can power your ambitions. The question is whether your agency can unlock everything it offers. That is where Udundi comes in.

What we do with Shopify Plus

Custom checkout experiences

Checkout customization is one of the most powerful and underused advantages of Shopify Plus. We design and engineer checkout extensions, custom fields, conditional logic, upsells, and branded checkout flows that reduce abandonment and increase average order value—capabilities that are simply not available on standard Shopify plans.

Custom checkout UI extensions
Conditional logic & custom fields
Post-purchase upsell & offer flows

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Shopify Flow & automation

Shopify Flow is exclusive to Plus—and it is one of the most effective ways to eliminate manual processes at scale. We design and implement custom workflows for order routing, tagging, fulfillment logic, customer segmentation, fraud detection, and inventory alerting, so your operations run without intervention.

Plus-only app development

Several Shopify APIs and extension points are gated to Plus merchants. We build private and public apps that leverage the full Plus API surface—custom checkout functions, advanced discount logic, fulfillment orchestration, and data pipelines that standard app developers simply cannot access.

Advanced integrations

Enterprise operations are rarely simple. We architect and build integrations with ERPs, warehouse management systems, 3PLs, CRMs, PIM software, and proprietary back-office tools—ensuring your Shopify Plus store is a reliable hub, not an island.

Shopify Plus migrations

Moving from Magento, BigCommerce, Salesforce Commerce Cloud, or WooCommerce? We handle end-to-end Plus migrations—full data transfer, SEO preservation, custom theme build, integrations, and training—so your team lands on Plus fully operational from day one.

Shopify Plus theme development

Your storefront is your brand's most important piece of infrastructure. We design and build fully custom Shopify Plus themes from the ground up—performance-optimized, conversion-led, and engineered to handle the catalog scale, traffic spikes, and merchandising complexity that Plus-level brands encounter daily.

B2B & wholesale on Plus

Shopify Plus includes native B2B and wholesale features—company profiles, net payment terms, volume pricing, and buyer-specific catalogs. We configure and extend these capabilities so your wholesale operation runs on the same platform as your DTC channel, without the overhead of a separate system.

Expansion stores & multi-store

Shopify Plus includes access to up to nine expansion stores under a single contract. We architect multi-store setups for international markets, regional brands, and B2B/DTC splits—with shared back-end logic where it makes sense and independence where it matters.

CRO for high-volume stores

At Plus-level traffic, small conversion gains compound into significant revenue. Our CRO retainer pairs behavioral data, UX experimentation, and in-house engineering to run structured A/B tests that improve your funnel—month after month, with full transparency on every result.

Ongoing Plus support & retainer

Enterprise stores cannot afford to wait. Our retainer model gives you direct access to an in-house Udundi team across development, design, SEO, and strategy—with flexible monthly hours from five to 100+—so you always have the right expertise available when the business demands it.

Why Udundi for Shopify Plus?

Plus is a tier—expertise is what you actually pay for. Here is why high-growth brands trust Udundi as their long-term Shopify Plus partner.

Certified Shopify Plus Partner

Udundi holds Certified Shopify Plus Partner status—a designation reserved for agencies that demonstrate verified expertise across a breadth of Shopify services. Your brand benefits from direct partner-level access, channels, and insight.

Fully in-house, US-based team

Every strategist, designer, developer, and SEO specialist on your project is a full-time Udundi employee based in the US. No outsourcing, no account teams filtering communication—just senior practitioners doing the work with accountability.

10+ years of Shopify depth

Founded in 2012, Udundi has grown alongside the Shopify platform—through every major architecture change, API expansion, and ecosystem shift. That history means we are not learning on your time. We bring solutions that only come from having built hundreds of stores at every scale.

Conversion-first mindset

Every Plus project we deliver—whether a new theme, a checkout customization, or an integration build—is evaluated through a conversion lens. We measure success by outcomes for your business, not by lines of code or hours logged.

Long-term partnership model

Enterprise Shopify stores require continuous evolution. Our retainer model is built for brands with a permanent roadmap— ongoing sprints across development, design, SEO, and CRO, with total flexibility to redirect capacity wherever the business needs it most.

Shopify Plus questions, answered

What is the difference between Shopify and Shopify Plus?

Shopify Plus is the enterprise tier of the platform. Key differences include full checkout customization, access to Plus-exclusive APIs and apps, Shopify Flow automation, native B2B and wholesale, multi-store expansion storefronts, a dedicated merchant success manager, and higher API rate limits. It is designed for brands with higher transaction volumes or more complex operational requirements.

Does my brand need Shopify Plus?

Shopify Plus becomes the right choice when your business is hitting the ceiling of standard Shopify plans—whether that is checkout customization needs, B2B requirements, volume-driven API limits, or the need for multi-store infrastructure. Our team is happy to assess your current setup and give an honest recommendation before you commit.

Can you migrate us to Shopify Plus from our current platform?

Yes. We handle end-to-end migrations to Shopify Plus from Magento, BigCommerce, Salesforce Commerce Cloud, WooCommerce, and other platforms. This includes full data migration, SEO preservation, theme development, integration setup, and post-launch support.

How does Udundi's retainer model work for Plus brands?

Retainers run from five to 100+ hours per month and are fully flexible across our service areas—development, design, SEO, CRO, or any combination. You get direct access to senior practitioners, transparent sprint planning, and the ability to redirect capacity as your priorities evolve each month.

What does a custom checkout build involve?

A custom checkout project typically starts with a discovery phase to map your conversion goals and technical requirements. We then design and build checkout UI extensions, custom fields, conditional logic, or post-purchase flows using Shopify's Checkout Extensibility framework—available exclusively to Plus merchants.

See what we've built for our clients

Doughy

Doughy is a vegan cookie dough brand with a vibrant visual identity. They came to us for a full website overhaul—including a Shopify migration from Wix, standout UX, and interactive custom features that brought their brand to life

Cozy Earth

Cozy Earth is a premium loungewear and bedding brand known for elevated comfort and sustainable materials. Since 2020, we have served as their full-service digital partner, guiding the brand through a period of explosive growth. What began as an urgent website rescue and relaunch evolved into a long-term partnership spanning Shopify development, CRO, UX/UI design, custom applications, mobile app development, and omni-channel marketing support.

Glow Luxury

Glow Luxury is a fast-growing luxury bag reseller with a highly engaged community. From the very beginning, we’ve partnered with their team to build the brand, from visual identity to a fully custom Shopify site tailored to their unique business model and evolving customer needs. With their loyal customer base, we’ve helped strategize new and unique ways to drive retention by leveraging Klaviyo.

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Explore all of our Shopify development services

Shopify Plus is the enterprise tier—Udundi covers every layer below it too. Theme development, app builds, migrations, SEO, CRO, and ongoing support—all under one roof.

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Have a Project in Mind? Let's Talk.

Whether you're launching, migrating, or optimizing, our team delivers creative, conversion-focused solutions tailored to your brand.

Certified Shopify Plus experts & agency

Why enterprise brands choose Udundi for Shopify Plus

Shopify Plus: built for brands that mean business