Writing a simple email shouldn't take an AI.

What we see

Many people no longer trust themselves to write a simple email. To move a meeting, chase an invoice or say no to a colleague, they open an AI assistant, describe the situation, reread, tone down the stiff wording, then send.

That detour costs time. Worse, it feeds the doubt: the more you delegate, the more you believe you can't do it anymore. And you lose your own voice, the one your colleagues and clients recognise.

The idea

Business writing can be trained like a sport. Not with rules to memorise, but with practice: realistic situations, an attempt, instant feedback, then again.

In Mailathlon, feedback comes from the reader's point of view. The recipient reads your email and reacts with their own personality: "Finally, a clear email!" or "Wait… what do they want?". It's the most useful feedback there is, and the one you never get at work.

What makes us different

• AI coaches you, it never writes for you. It plays the recipient and tells you what's missing. It doesn't write your email.
• The sample answer only appears after you try. First you write, then you compare.
• You learn a method, not templates to copy. Key information, a clear ask, the right tone: habits that work for every email, not just the ones in the game.

Who it's for

• Employees who write dozens of emails a day and want to go faster, on their own.
• Apprentices and interns learning the codes of business writing.
• People writing in a language that isn't their own, in English or in French.
• Teams and schools that want to train written communication. See our offer for teams.

Our commitments

• Free to play. The full game, no time limit.
• No account. Your progress stays on your device.
• No email kept. Your text is scored, then forgotten by our server.
• No ads. No banners, no partners, no data resale.
• No advertising cookies. Anonymous audience measurement you can turn off in one click. Details.

FAQ