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Flatline Agency
Amsterdam Shopify and Shopify Plus agency for D2C, B2B and omnichannel brands, handling replatforming, custom development, unified commerce and performance marketing. It also runs Klaviyo email and SMS programs. On RankedAgencies it appears in 3 rankings: #7 in email marketing and Klaviyo agencies, #10 in eCommerce marketing agencies and #19 in Shopify and Shopify Plus agencies.
Flatline Agency at a glance
- Founded
- 2019
- Headquarters
- Amsterdam, Netherlands
- Offices
- Amsterdam, Netherlands
- Team
- 51-200 people
- Services
- Shopify development, Store migration, Headless commerce, B2B commerce, Klaviyo email and SMS and Performance marketing
- Industries
- B2B, Fashion, Electronics and Jewelry and accessories
- Partner tiers
- Shopify Platinum Partner and Klaviyo Platinum Master Partner
- Client reviews
- 4.9 on Clutch from 20 reviews
Last checked . Each fact below links to the page it was checked on.
Flatline Agency in RankedAgencies rankings
- #7Email marketing and Klaviyo agencies7 of 26 · score 76 · Klaviyo Platinum Master, EMEA Rising Star Partner of the Year 2025 · checked
- #10eCommerce marketing agencies10 of 26 · score 46 · Klaviyo Platinum Master, Rising Star Agency (EMEA) 2025 · checked
- #19Shopify and Shopify Plus agencies19 of 26 · score 91 · Shopify Platinum Partner, 4.9 from 21 reviews · checked
Flatline Agency partner tiers
- Partner tierShopify Platinum Partner
- Partner tierKlaviyo Platinum Master PartnerVendor directoryhttps://connect.klaviyo.com/partner/flatline-agency
Flatline Agency awards
- AwardKlaviyo K:Partners Awards 2025, Agency Partner of the Year, EMEA (Rising Stars), winner (shared)Independent pagehttps://www.klaviyo.com/newsroom/partner-awards
Flatline Agency client reviews
- Clutch4.9 from 20 reviewsIndependent pagehttps://clutch.co/profile/flatline-agency
About Flatline Agency
- Founded2019Agency's own sitehttps://www.linkedin.com/company/flatline-agency
- HeadquartersAmsterdam, NetherlandsAgency's own sitehttps://www.linkedin.com/company/flatline-agency
- OfficesAmsterdam, NetherlandsAgency's own sitehttps://clutch.co/profile/flatline-agency
- Team51-200 peopleIndependent pagehttps://www.linkedin.com/company/flatline-agency
- ServicesShopify development · Store migration · Headless commerce · B2B commerce · Klaviyo email and SMS · Performance marketingAgency's own sitehttps://www.shopify.com/partners/directory/partner/flatline-agency
Questions about Flatline Agency
What is Flatline Agency?
Amsterdam Shopify and Shopify Plus agency for D2C, B2B and omnichannel brands, handling replatforming, custom development, unified commerce and performance marketing. It also runs Klaviyo email and SMS programs. On RankedAgencies it appears in 3 rankings: #7 in email marketing and Klaviyo agencies, #10 in eCommerce marketing agencies and #19 in Shopify and Shopify Plus agencies.
Where is Flatline Agency based?
Flatline Agency is based in Amsterdam, Netherlands.
Which RankedAgencies rankings is Flatline Agency in?
Flatline Agency appears in 3 rankings: #7 in email marketing and Klaviyo agencies, #10 in eCommerce marketing agencies and #19 in Shopify and Shopify Plus agencies.
What partner tiers does Flatline Agency hold?
Flatline Agency holds Shopify Platinum Partner and Klaviyo Platinum Master Partner.
What do clients say about Flatline Agency?
Flatline Agency is rated 4.9 on Clutch from 20 reviews.
What services does Flatline Agency offer?
Flatline Agency offers Shopify development, Store migration, Headless commerce, B2B commerce, Klaviyo email and SMS and Performance marketing.
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