Mailstro is a B2B prospecting tool designed for Belgian artisans, freelancers and small businesses. Designed from the outset for non-tech-savvy users, the project aimed to transform an activity perceived as complex – sending marketing campaigns – into a simple, guided and reassuring process. The challenge: to offer commercial autonomy to professionals who have neither the time nor the desire to become digital experts.

Mailstro is a B2B prospecting tool designed by Flavien, with a simple yet ambitious goal: to help Belgian artisans and small businesses grow their businesses independently, without having to become marketers.

But in this market, all existing tools (Lemlist, La Growth Machine, Skaly) share a common bias: they are designed by marketers, for marketers. Overloaded interfaces, complicated onboarding, ubiquitous technical jargon... The result: the users who really need them — artisans, SMEs, freelancers — don't understand them. And don't use them.

These users don't need a marketing course. They want customers.

Mailstro has been completely redesigned so that even craftsmen with no marketing experience can find customers on their own.

The interface has been simplified to the extreme: one action at a time, clear explanations at each step, no unnecessary distractions. The language has been adapted: no more technical jargon, just simple, concrete words. Users understand what they are doing, why they are doing it, and what it will bring them.

The entire process is guided, but without being patronising. We help them configure their searches, create their first contact lists, and send their campaigns without ever overwhelming them with technical details. The filters have been redesigned to be easy to use, even when the data is complex. And if they don't know where to start, the application takes them by the hand: intelligent suggestions, pre-filled templates, contextual help messages.

Thanks to an ultra-simplified experience, Mailstro now allows any artisan or SME to launch their first campaign in less than 10 minutes, without training.

The design has reduced the number of steps, minimised friction, and above all brought clarity where other tools caused confusion.

The real success? Transforming a technical tool into a concrete commercial lever, accessible to all — without sacrificing performance.