How? Through best in class e-mail marketing and retention strategies.
We started working with InboxOS at the beginning of 2024. They completely restructured our Klaviyo account and implemented improvements throughout the year. We’re extremely satisfied with the collaboration—Luc and Cedric are always easy to reach, and if something needs to be done, it gets handled immediately.
Martijn
Founder of Polarwise
Boutoi recently started working with InboxOS, and the results of our campaigns speak for themselves. Clear approach, strong strategic thinking, always going the extra mile, and genuinely willing to brainstorm with you. It truly feels like a team effort.
Maik
Founder of Boutoi
Since January 2025, we've been working with the InboxOS team and we're very satisfied. From the start, they’ve been proactive, always reachable, and fully tailor their approach to our needs. Thanks to their involvement and expertise, we've seen clear improvements in email design, tone, customer journey, and revenue.
Willem
Founder of Aldorr
We've been working with InboxOS since 2023, and the collaboration has been fantastic. Their team completely revamped our email marketing, which immediately led to significantly better performance.
We’ve also relied on their support during sales periods for two years now. They're not only engaged but also think along with us to ensure everything runs as smoothly as possible—with demonstrably great results.
What makes Luc and Cedric stand out is that they go beyond just email marketing. They’re always willing to share their knowledge and think along at a strategic level, with the goal of growing together.
Olliver
Founder of CookingTotem
Luc has made huge improvements in our email marketing. It was originally set up by another party but didn’t deliver much. Now it’s running well and generating great results every month!
Ruud
Founder of Kwebbels Kinderboeken
We create retention strategies that align with your brand goals with emails that speak to your customers' psychology and don’t get lost in their inbox.
We’ll make sure you send the right message, to the right person, at the right time. We personalize content that feels 1:1 at scale.
We manage your weekly sends & lifecycle marketing to keep your brand top-of-mind and inbox-effective.
Inbox placement is non-negotiable. We proactively manage the health of your entire system.
During this free strategy call we’ll show how our retention system could grow your profit.
