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Our case studies: high-impact HubSpot projects

From design to CRM, see how IEA transforms business challenges into measurable results

As a HubSpot-focused agency, IEA helps companies design, develop, and optimize high-performing digital experiences.
From custom websites to CRM and marketing automation, our case studies showcase how we deliver scalable solutions that drive growth and performance.
All articles Front-end development UX UI design Back-end development Branding CRM & Sales automation CRM & Marketing automation e-commerce
Hellowork website redesign & ongoing HubSpot support
Front-end development

Hellowork website redesign & ongoing HubSpot support

Challenge: fully manageable B2B website

  • Deliverables: 1 main website and 3 child themes
  • Scope of work: Web development (front-end and back-end) on HubSpot and daily support
  • Budget: ~€5k to €15k
  • Project duration: Ongoing / Daily
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ThisIsBlindTest website redesign
Front-end development

ThisIsBlindTest website redesign

ThisIsBlindTest revolutionizes parties and events with its immersive, interactive blind tests. Combining music, technology and conviviality, the platform offers unforgettable experiences, suitable ...

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HubSpot RGE directory connected to official ADEME data
Back-end developmentFront-end development

HubSpot RGE directory connected to official ADEME data

Challenge: Dynamic directory and custom ADEME integration with an advanced SEO strategy

  • Deliverables: 1 dynamic directory, dedicated pages, search engine, and interactive dynamic map
  • Scope of work: Front-end and back-end development on HubSpot (API integrations, custom connections & ETL)
  • Budget : ~7k €
  • Project duration: 1.5 months
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What our clients say

Trusted by more than 50 companies for their HubSpot projects

Since 2022, more than 50 companies have trusted if/else agency to design and develop their HubSpot projects.

Ready to become our next success story?
Let's talk about your project!
Lucas Chastagner
Title Global Growth and Performance Manager - COHABS

I’ve worked with Garance, Chris, and Luc on several projects for various companies, and I highly recommend them. Communication has always been smooth, and they are true experts in building high-quality HubSpot landing pages that meet advanced functional requirements.
Philippe Rusu
President - CR SYSTEM

if/else agency deployed our HubSpot CRM solution by customizing both the interfaces and user journeys to perfectly align with our business needs. They took the time to truly understand our operational specificities and consistently provided valuable recommendations to adapt the platform to our working methods.

Whenever our requirements went beyond HubSpot’s standard functionalities, they helped us rethink our processes from a different perspective while always keeping our business goals and key performance indicators in focus.

if/else agency is a technically experienced HubSpot integrator that genuinely listens to user needs. They effectively bridge the gap between client expectations and the software’s capabilities. Their flexibility and responsiveness clearly demonstrate their commitment to delivering the results expected by their clients.

We will definitely continue working with them for our future HubSpot CRM customization and interoperability needs.
Nicolas Deswarte
CMO - Thiga

I've finally found my HubSpot CMS partner !
After a very well executed site redesign, I'm happy to have finally found my strategic partner to serve up the web experiences of my dreams! Excellent communication, very good planning, good advice and real support for our web developments. I highly recommend IF/Else.
Amrinne Laudé
Founder - Maison Tehsin

[...] A big THANK YOU to the whole team! Thank you for your professionalism, creativity, and responsiveness! Special mention to Garance, who was PROACTIVE in responding to all my requests day and night... If/else Agency, a true strategic partner for even the craziest projects!
Camille Folliot
COO & Partner - Nile

Luc and Garance have worked with us on a number of website development projects, from mock-up design to online launch. Their mastery of the HubSpot CMS, their rigor and professionalism are a real plus when it comes to optimizing website performance. Skills that are rare on the market! 
Julie Machillot
CEO & founder - Storyfox

We worked with if/else agency to redesign the theme of our corporate website. We're very satisfied with the result. The collaboration was seamless, they have real expertise and were proactive in making our project a success. 
Xavier Lagrange
Executive Education Manager - EFREI

[...] The team demonstrated excellent listening skills and a keen understanding of our challenges.  We highly recommend if/else agency for the quality of their support, their professionalism, and their ability to integrate effectively into a project team.
Camille Collin
B2B Acquisition Project Manager - HelloWork

We called on If/Else to redesign our site and develop a dynamic calendar. Everything turned out just the way we wanted it, and we're very happy with the result - it makes our work so much easier! 
Loïc Schemel
Head of SEO & CRM - Swapn

[...] We have no hesitation in recommending If/Else Agency, who have supported us with exemplary professionalism.
Their technical expertise, combined with a genuine willingness to listen, guarantees solutions tailored to our needs.
A big thank you to the If/Else team for their responsiveness and invaluable support on a daily basis!
Alexandra Desbat
Digital Marketing Specialist - Vade

We worked with Luc and Garance on 2 separate projects: the optimization and design of the corporate site and the migration + redesign of another site. During these 2 projects, they demonstrated their mastery, rigor, complementarity and professionalism. 
Thierry Calederón
CEO & HubSpot CRM Specialist - MMIO

Very good collaboration with the IEA teams on the HubSpot CMS. We had to integrate a booking engine from a third-party business tool. Delivery on time and quality on target. A job well done. 
Julie Pravaz
Project Manager - Tiime

A highly skilled team that is close to its clients. We regularly entrust them with Hubspot developments, and they always coordinate projects superbly. It's a pleasure to work with Garance, Luc, and Christopher.