Flatline Agency
Service partner
4.9
(21)
Partner since September 2020
Price range for selected services
Contact for pricing
Contact information
Primary location
Amsterdam, Netherlands
Supported locations
Netherlands, Germany, United States
Languages
English, German, Dutch
About
Business description
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.
Platinum Partner
Partners are tiered based on multiple factors, including their history of experience and proven success on Shopify.
Other services
Store migration, Headless commerce, Wholesale/B2B, POS setup and migration, Conversion rate optimization, International expansion
Industries
Business to business (B2B), Clothing and fashion, Electronics, Jewelry and accessories
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.View 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 stackView 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.View 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.View 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%.View 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.View featured work
Rating4.9(21)
Overall rating summary
Ratings based on and
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Reviews
Maison T
Quality of work
5Communication
5We 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 a...
Service reviewed: Store build or redesign
Cyell
Quality of work
5Communication
5Fijne samenwerking met Flatline! Ze hebben ons geholpen bij de migratie naar shopify en helpen ons nu bij het optimaliseren van de webshop.
Service reviewed: Store migration
Beachlife
Quality of work
5Communication
5Fijne, soepele samenwerking met een kwalitatief top eindresultaat!
Service reviewed: Store migration
Malelions
Quality of work
5Communication
5Great 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!
Service reviewed: Store build or redesign
Baskèts
Quality of work
5Communication
5Would 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.
Service reviewed: Store migration
Perro Collection
Quality of work
5Communication
5Flatline 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 lo...
Service reviewed: Store migration
Duquezzi
Quality of work
5Communication
5Flatline 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.
Service reviewed: Theme customization
Croyez
Quality of work
5Communication
5Flatline 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.
Service reviewed: Theme customization
Refined Department
Quality of work
5Communication
5We’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...
Service reviewed: Store build or redesign
Easywalker
Quality of work
4Communication
4Flatline 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.
Service reviewed: Ongoing website management