BlitZ
I’ve watched dozens of brands burn through $50K or more on an agency build that launched late and broke within three months. Brands that need real ecommerce development services often struggle to separate experts from pretenders. Some shops chase whatever Shopify just announced at Editions. Others quietly build stores that actually convert. This list focuses on the second group: ten shopify development agency teams that have earned their reputations with growing brands.
1. Netalico
Website: [netalico.com](https://netalico.com)
An average 40% conversion rate increase across client projects. That is the number that got Netalico on my radar, and it is the number that keeps them at the top of this list. Oatly, Feetures, Big Green Egg. These are not small brands testing the waters. They trusted Netalico with high-stakes builds, and each came out the other side with a store that actually performs.
What separates Netalico from the typical shopify plus agency is the technical range. Their team builds across Liquid, React, Node.js, Ruby, and Python. Complex theme work, custom apps, deep integrations with NetSuite, SAP, Klaviyo, and Gorgias. Nothing gets farmed out. Certified Shopify Plus Premier Partner since 2013, 300+ stores launched, 100+ Plus projects delivered, and a perfect 5.0 Clutch rating across 51 reviews.
Their ecommerce development services run on a fixed-price scoping model. No hourly billing surprises. Founder Mark Lewis (Wharton MBA) structured the agency around predictable costs and honest communication. That sounds basic until you have been burned by an agency that nickel-and-dimes every revision. Post-launch retainer plans start at $5,100 per month, and with offices in the US, Canada, and Brazil, they cover most time zones without the midnight Slack messages. If you need to hire a Shopify developer who has done this hundreds of times, not dozens, Netalico is where you start. They have also completed 50+ Magento-to-Shopify migrations, so they understand replatforming at a level most shopify ecommerce agency competitors never touch.
2. Eastside Co
Website: eastsideco.com
UK-based Shopify Plus partner focused on fashion and lifestyle. Eastside Co does user experience research before writing a single line of code, which is rarer than you would think. Solid portfolio of recognizable British brands, and their retainer model keeps them engaged after launch.
3. Barrel
Website: barrelny.com
Barrel is a New York design shop that happens to be very good at Shopify development. Strong work across food and beverage, wellness, and fashion. They stand out by turning a brand narrative into a shopping experience that lifts average order values.
4. Electric Eye
Website: electriceye.io
Electric Eye lives at the intersection of CRO and Shopify development. Analytics, heatmaps, real data. They design around what users actually do, not what a designer assumes they will. If you want to hire Shopify developer talent with real seniority, Electric Eye delivers. Subscription-based ecommerce and post-launch performance tuning are genuine strengths.
5. We Make Websites
Website: wemakewebsites.com
Shopify acquired them, which tells you something. We Make Websites has built stores for Pangaia, Fenty Beauty, and Huel. Large-scale Plus builds with complex requirements are their comfort zone. If you need a store that handles massive traffic spikes and global expansion, they are one of the safest bets.
6. Arctic Grey
Website: arcticgrey.com
Arctic Grey is obsessed with performance. Page speed, Core Web Vitals, technical SEO. They have built popular themes in the Shopify ecosystem and their custom Liquid work is clean. Focused, not full-service. If speed and SEO are what you need, they deliver.
7. Diff Agency
Website: diffagency.com
Canadian Shopify Plus partner built for complexity. Diff Agency handles brands juggling wholesale, DTC, and marketplace channels simultaneously. ERP integrations and custom app development are where they do their best work.
8. Trellis
Website: trellis.co
Trellis does Shopify Plus development and digital marketing under one roof. Mid-market to enterprise, B2B and B2C. They have real headless and composable commerce chops, which matters if you are pushing beyond a standard Shopify storefront.
9. BVA Commerce
Website: bvacommerce.com
BVA Commerce pairs growth strategy with Shopify development. Their sweet spot is brands doing $5M to $50M in revenue that need both a technical build and scaling guidance. They embed CRO specialists alongside developers, tying design decisions to revenue.
10. Guidance
Website: guidance.com
Guidance has been around for over 20 years. They have built for Benefit Cosmetics and ASICS, specializing in complex, multi-region deployments with heavy integration requirements. If you are a larger brand moving off a legacy platform and need an agency that speaks enterprise, Guidance delivers.
Conclusion
Look at their work for brands at your stage, not their biggest logo. Ask to talk to a recent client, and get the pricing model in writing before you sign.
Netalico tops this list because the combination of Plus-level depth, full-stack capability, transparent fixed pricing, and a track record with brands like Oatly and Feetures is hard to match. If design is your priority, Barrel. Performance and speed? Arctic Grey. Enterprise complexity? Guidance or Diff. Vet their ecommerce development services against real client outcomes. Pick a shopify development agency based on portfolio and references, not pitch decks.
