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Global disruptor in custom development.

Flatline Agency is a global disruptor in custom development & design experiences based in Amsterdam.

Our 'unique selling point' is that we begin where every other agency stops. We deliver high-quality work, fast - while leveraging the newest and best techniques available. Of course, all our products are built to scale out of the box - future proof as to the standard.

  • $10,000+
  • $100 - $149 / hr
  • 10 - 49
  • Amsterdam, Netherlands
  • Founded 2019

1 Locations

  • Amsterdam , Netherlands
Total Reviews
20
Average Referral Rating
5.0 /5
Most Common Project Size

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    Flatline Agency Review Insights

    Overall Review Rating

    4.9
    • Quality 4.9
    • Schedule 4.8
    • Cost 4.7
    • Willing to Refer 5.0

    Top Mentions

    • timely (7)
    • communicative (5)
    • flexible (4)
    • knowledgeable (4)
    • great project management (3)
    • high-quality work (3)
    • personable (3)
    • unique expertise (3)

    Review Highlights

    • Strong Client Relationships

      Many clients noted the agency’s ability to understand their needs quickly and tailor solutions accordingly. The founders' personal involvement and the team’s proactive communication were particularly appreciated.

    • Areas for Improvement: Internal Communication

      One client suggested that Flatline Agency could improve internal communication. However, they acknowledged that this is a common challenge for many companies.

    • Expertise in Website Development

      Multiple reviews highlight Flatline Agency’s proficiency in developing custom websites tailored to specific business needs. Clients appreciated the personalized solutions that addressed unique challenges such as e-commerce functionalities, API integrations, and user experience design.

    • Positive Business Impact

      Several clients reported significant improvements in key metrics such as conversion rates, lead generation, sales growth, and digital presence after working with Flatline Agency. Their work often resulted in measurable business benefits.

    • Streamlined Communication

      Clients appreciated the streamlined communication processes, with frequent updates and clear channels through tools like Slack, WhatsApp, and email. This ensured that clients were always in the loop and could provide timely feedback.

    • High-Quality Deliverables

      The quality of Flatline Agency’s deliverables was consistently praised. Clients noted that the final products met or exceeded their expectations, with attention to detail and a focus on achieving the desired outcomes.

    See all 20 Reviews
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    Web Design & Digital Marketing for Asset Management Company

    • Advertising Branding Content Marketing Conversion Optimization Digital Strategy Email Marketing Graphic Design Marketing Strategy Media Planning & Buying Other Digital Marketing Other Marketing Pay Per Click Search Engine Optimization Social Media Marketing UX/UI Design Web Design Web Development
    • Confidential
    • Jan. 2023 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    4.5
    Cost
    5.0
    Willing to Refer
    5.0

    "No stone is left unturned when it comes to strategy, and their adaptability is the key to getting results."

    Mar 17, 2023
    Digital Marketing Specialist, Auréus Group B.V.
    Anonymous
    • Financial services
    • Netherlands
    • 51-200 Employees
    • Online Review 
    • Verified

    Flatline Agency provides ongoing digital marketing services for an asset management company. They've also revamped the website, created paid and organic content, and helped improve the brand's digital presence.

    Custom Upsell Plug-In Dev for Lingerie Company

    • E-Commerce Development
    • Less than $10,000
    • October 2021
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "I was impressed by their mix of different skills from UX design to custom development."

    Nov 25, 2022
    Co-Owner, Pavo Couture
    Anonymous
    • Consumer Products
    • Amsterdam, Netherlands
    • 1-10 Employees
    • Online Review 
    • Verified

    Flatline Agency developed a custom upsell plug-in for a lingerie company. The team initially provided the designs that showed what the plug-in would look like. From there, they started developing the product. 

    Web Design & Dev for Luxury Jewelry Company

    • Custom Software Development UX/UI Design Web Design Web Development
    • $200,000 to $999,999
    • Jan. 2022 - Ongoing
    4.5
    Quality
    4.5
    Schedule
    4.0
    Cost
    5.0
    Willing to Refer
    5.0

    “They’re really helpful and quick to respond.”

    Nov 16, 2022
    CMO, Tirisi Company
    Diego Van Sommeren
    • Retail
    • Amsterdam, Netherlands
    • 1-10 Employees
    • Phone Interview 
    • Verified

    Flatline Agency has provided web design and development services for a high-end jewelry company. They’ve completely redesigned the WordPress website and created an ordering system for B2B and B2C clients.

    WordPress Design & Development for Delivery Provider

    • Web Design Web Development
    • $10,000 to $49,999
    • Feb. - Apr. 2022
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "Their project management style is easy."

    Apr 7, 2022
    Founder, Lockster
    Abel Bijlsma
    • Logistics & Supply Chain
    • Amsterdam, Netherlands
    • 11-50 Employees
    • Online Review 
    • Verified

    Flatline Agency designed and developed a delivery provider’s WordPress website. They initially facilitated a kick-off meeting to discuss the client’s desires and goals before building the site from scratch. 

    E-Commerce Development for Medical Service Company

    • E-Commerce Development
    • $10,000 to $49,999
    • Sep. - Nov. 2021
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "Flatline Agency’s work was excellent. It was a great experience."

    Feb 1, 2022
    Owner & Founder, Medtesters
    Hugo Voorheijen
    • Healthcare
    • Amsterdam, Netherlands
    • 11-50 Employees
    • Phone Interview 
    • Verified

    Flatline Agency designed and developed a WooCommerce website for a medical service company. The site integrated an API for lab results and a payment gateway, which were also built by their team.

    Custom Web Development for Video Production Company

    • Custom Software Development Web Development
    • Less than $10,000
    • July - Aug. 2019
    4.5
    Quality
    4.5
    Schedule
    4.0
    Cost
    5.0
    Willing to Refer
    4.5

    "We always had one person discuss things with us, so the process was swift and easy."

    Jan 14, 2022
    Owner, House of Lumen
    Gerald Sandel
    • Motion Pictures & Film
    • Amsterdam, Netherlands
    • 1-10 Employees
    • Phone Interview 
    • Verified

    Flatline Agency developed a WordPress website for a video production company. The site had one page with videos and information, and they rearranged the template according to the client’s needs.

    E-Commerce Development for Menswear Retailer

    • E-Commerce Development
    • $50,000 to $199,999
    • Dec. 2021 - Ongoing
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    3.5
    Willing to Refer
    5.0

    "We are impressed with their flexibility and deep knowledge of coding."

    Jan 14, 2022
    CCO, OGER
    Bjorn Hillerstrom
    • Retail
    • Amsterdam, Netherlands
    • 51-200 Employees
    • Online Review 
    • Verified

    Flatline Agency was hired by a menswear retailer to transform their e-commerce platform, ERP, and POS solution into a 360 omnichannel solution. They are currently building a Shopify site for the client.

    Custom Software Dev for Sporting Goods Company

    • Custom Software Development
    • $10,000 to $49,999
    • Aug. 2021 - Feb. 2022
    4.5
    Quality
    4.5
    Schedule
    5.0
    Cost
    4.5
    Willing to Refer
    5.0

    "They proved themselves to be flexible, knowledgeable, and pragmatic in finding solutions for technical challenges."

    Jan 12, 2022
    E-Commerce Director, North Actionsports Group
    Anonymous
    • Sports
    • Katwijk aan Zee, Netherlands
    • 51-200 Employees
    • Online Review 
    • Verified

    Flatline Agency provided custom software development services for a sporting goods company. They built a custom connector between the client's internal systems and Shopify websites.

    Web Dev & Branding for Consulting Company

    • Branding Web Design Web Development
    • Less than $10,000
    • Jan. 2021 - Jan. 2022
    5.0
    Quality
    5.0
    Schedule
    5.0
    Cost
    5.0
    Willing to Refer
    5.0

    "We're impressed with their communication, readiness, support, and eye for detail."

    Jan 6, 2022
    CEO, Pearson & Partners
    Anonymous
    • Consulting
    • Amsterdam, Netherlands
    • 11-50 Employees
    • Online Review 
    • Verified

    Flatline Agency has collaborated with a consulting company to develop and design a new website. They've also helped come up with a restructured brand identity.

    Custom CMS Dev for IT Services Company

    • Custom Software Development Web Development
    • $10,000 to $49,999
    • Oct. 2021 - Feb. 2022
    5.0
    Quality
    5.0
    Schedule
    4.0
    Cost
    4.0
    Willing to Refer
    5.0

    "Flatline Agency provided complete custom solutions for our client's needs."

    Jan 6, 2022
    Owner, Digi2L
    Lior Dekel
    • IT Services
    • Haarlem, Netherlands
    • 1-10 Employees
    • Online Review 
    • Verified

    In efforts to centralize data across different company platforms, an IT services firm hired Flatline Agency to help with the development of a CMS system. Key technologies used were React and Node.js.

    Locations (1)

    16 - 20

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