Flatline Agency
About Flatline Agency
Flatline Agency, based in Amsterdam, helps ambitious brands scale on Shopify and Shopify Plus through replatforming, custom development, unified commerce, and performance marketing for D2C, B2B, and omnichannel businesses across international markets and teams globally.
Additional Services
- 3D modelling
- SEO
- Product and collection setup
- Store build or redesign
- Theme customization
- International expansion
- Site performance and speed
- Wholesale/B2B
- Sales tax guidance
- Business strategy guidance
Show all 23 servicesShow fewer services
- Custom domain setup
- Analytics and tracking
- Sales channel setup
- Email marketing
- Systems integration
- Troubleshooting
- Headless commerce
- Website audit and optimization strategy
- Custom apps and integrations
- Search engine advertising
- Social media marketing
- Conversion rate optimization
- Checkout upgrade
Contact
Industries
Headquarters
Languages
Pricing Info
Our Projects & Clients
Gisou | Shopify Plus growth for a global beauty brand
Gisou is a global beauty brand rooted in a six-generation beekeeping heritage. Flatline supports its Shopify Plus ecosystem through performance optimisation, UX improvements, and targeted Klaviyo campaigns—helping the brand create a smoother, more scalable ecommerce experience that drives stronger engagement, supports conversion, and enables growth across 30+ international markets.
Flatline Agency
Featured work
OGÉR | Award-winning omnichannel migration to Shopify (Plus) & POS
OGÉR is a luxury fashion brand focusing on high-end Italian menswear. The brand has been running its business since 1989 until now with the core value of “based on high-quality products and personal service”, and is currently one of the pillars of men’s luxury fashion in the Netherlands. Flatline migrated from Magento to Shopify Plus, POS Pro and build up the new eCommerce marketing stack
Category
Flatline Agency
Featured work
Stoov | From four stores to one Shopify Markets setup
Stoov needed a simpler and more scalable international setup. Flatline consolidated four separate Shopify stores into one Shopify Markets environment, improved theme performance, and optimized the product experience with clearer variant logic and Combined Listings. The result was a leaner operating model, faster storefront performance, and a reported 13% uplift in conversion.
Flatline Agency
Featured work
JohnBeerens.com | Shopify Plus for B2C, B2B and growth
JohnBeerens.com needed a Shopify Plus setup that could better support both B2C and B2B growth. Flatline rebuilt the experience to improve speed, flexibility, and operational control, with integrations including Exact via xCore, CM.com, custom filtering, quick-buy functionality, and Checkout Blocks—creating a more scalable platform for international growth.
Flatline Agency
Featured work
Lions Fashion Group | One scalable foundation for multiple brands
Lions Fashion Group operates multiple fashion brands with distinct audiences and commercial needs. Flatline built one shared ecommerce foundation that allows each brand to scale independently while keeping technology, marketing, CRO, and data aligned. The result is lower operational complexity, lower total cost of ownership, and structural conversion rates above 4%.
Flatline Agency
Featured work
Urban Arrow | Headless Shopify for global expansion
Urban Arrow needed a platform that could support complex products, localized commerce, and international growth. Flatline delivered a headless architecture built on Shopify and Storyblok, enabling greater flexibility across content and commerce while supporting advanced product logic, localized pricing, and integrated digital journeys across 26 markets.
Flatline Agency
Featured work
Award-winning Migration to Shopify Plus for Mason Garments
Mason Garments, a prestigious brand known for luxury footwear since 2012, successfully migrated their eCommerce platform from Magento to Shopify Plus. The transition included the integration of POS Pro, enhancing both their direct-to-consumer (D2C) and business-to-business (B2B) operations.
Category
Flatline Agency
Featured work
Van Poelgeest: Streamlining the Purchase of Car Accessories through Shopify
Flatline developed a Shopify-based webshop for Van Poelgeest, the largest BMW dealer in the Netherlands, which accounts for one-third of the total Dutch BMW fleet. The project included a comprehensive marketing stack setup with Klaviyo, Gorgias, and Reviews.io, allowing customers to enter their plate number to easily find compatible accessories, thereby creating a seamless purchasing experience.
Category
Flatline Agency
Featured work
Custom Middleware Development for ERP, PIM, and Shopify Integration
Flatline collaborated with North Actionsports Group, a leading brand in the action sports industry, to transform their operational perspective. The project involved developing a custom middleware solution designed to automate workflows among nine webshops, PIM, and ERP systems. This integration empowers the group of brands to enhance their scalability, similar to the high performance of their athletes.
Category
Flatline Agency
Featured work
BALR: Omnichannel Growth Strategy & Shopify Plus Migration
Flatline Agency developed a comprehensive omnichannel platform combining eCommerce and retail for BALR, supported by a robust growth marketing strategy. By integrating Shopify applications like Klaviyo, Gorgias, CDP, and Reviews.io, we ensure a seamless online purchase journey for every football and luxury enthusiast.
Category
Flatline Agency
Featured work
Innovative Digital Experience for Vanilia: Advanced Animations and UX Flexibility
For Vanilia, a pioneering fashion brand, we ventured into the realm of what many deem 'impossible.' By meticulously researching Vanilia’s UX flows during the design phase, we developed a variety of animations and micro animations that elevate the brand's digital presence, creating a groundbreaking experience in the digital space for Vanilia.
Category
Flatline Agency
Featured work
Reviews
6 of 9 reviews shown.
Malelions
9/30/2026
Great agency to work with. They did our migration within 3 months without any performance dips. Since then we are optimizing our E-commerce Platform and already partnered up for 2 others brands within our group as well!
Baskèts
9/29/2026
Would definitely recommend! Great agency to work with to fix your store migration. Everything went up after we changed towards Shopify and Flatline is definitely a great partner to help you with that. Clear, quick and with a lot of knowledge.
Perro Collection
9/24/2026
Flatline Agency has been a great partner in taking Perro Collection to the next level. They successfully managed our migration and data transition from WooCommerce to Shopify, while laying a strong foundation for our new store. From redesign and UX to CRO and custom development, the team combined strategic thinking with strong technical execution. A professional and reliable partner for brands looking to build and scale on Shopify.
Duquezzi
9/24/2026
Flatline has been a real asset to our store. They take the time to understand our brand and goals, and turn that into solid, well-executed work. Communication is always clear and fast, and they regularly come up with ideas we hadn't thought of ourselves. You can tell they're invested in getting results, not just finishing tasks. A pleasure to work with.
Croyez
9/24/2026
Flatline consistently delivers high quality work. Communication is clear and straightforward, and they always go the extra mile to help us as well as possible. What sets them apart is their results-driven mindset: they don't just build what you ask for, they focus on what actually moves the needle for your store. Highly recommended.
Refined Department
9/23/2026
We’re really happy with our collaboration with Flatline Agency! They know everything there is to know about e-commerce and marketing, which means they don’t just build a great website, but also really think along with you and advise you on what works and what doesn’t. They’ve helped us take our brand to the next level by creating a webshop that feels much more premium and mature, while still being easy to use and working exactly as it should. Communication was also super easy and informal throughout the whole process, which made working together really enjoyable. Exactly what we were looking for! Very happy with both the collaboration and the end result. Would definitely recommend!