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.

Services and pricing

• Store migrationPrice on request
• Headless commercePrice on request
• Wholesale/B2BPrice on request
• POS setup and migrationPrice on request
• Conversion rate optimizationPrice on request
• International expansionPrice on request
• Custom apps and integrationsPrice on request
• Email marketingPrice on request
• Analytics and trackingPrice on request
• Systems integrationPrice on request
• Ongoing website managementPrice on request
• Custom domain setupPrice on request
• Website audit and optimization strategyPrice on request
• Business strategy guidancePrice on request
• Store build or redesignPrice on request
• TroubleshootingPrice on request
• Product and collection setupPrice on request
• SEOPrice on request
• Site performance and speedPrice on request
• Social media marketingPrice on request
• Theme customizationPrice on request
• Sales channel setupPrice on request
• Store settings configurationPrice on request
• Search engine advertisingPrice on request
• Checkout upgradePrice on request
• Sales tax guidancePrice on request
• 3D modellingPrice on request

Featured work

• 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.

• 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

• 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.

• 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.

• 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%.

• 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.

Ratings and reviews

• Maison TStore build or redesignOct 5, 2026

  We had a great experience working with Flatline Agency on our e-commerce shop. They were very flexible throughout the process, especially as our requirements became clearer and changed along the way. What we really appreciated was that they didn’t just build what we asked for, but also challenged us when needed and were critical about our wishes and priorities. They genuinely acted as a partner and thought along with us to make the end result better. Great team, easy to work with, and definitely recommended

• CyellStore migrationOct 5, 2026

  Fijne samenwerking met Flatline! Ze hebben ons geholpen bij de migratie naar shopify en helpen ons nu bij het optimaliseren van de webshop.

• BeachlifeStore migrationOct 5, 2026

  Fijne, soepele samenwerking met een kwalitatief top eindresultaat!

• MalelionsStore build or redesignSep 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!

• BaskètsStore migrationSep 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 CollectionStore migrationSep 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.

• DuquezziTheme customizationSep 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.

• CroyezTheme customizationSep 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 DepartmentStore build or redesignSep 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!

• EasywalkerOngoing website managementSep 23, 2026

  Flatline has been a helpful partner in improving our Easywalker webshop and Klaviyo setup, translating our ideas into practical updates and keeping us informed along the way.

Read all reviews on Shopify →