Fyxer has built an AI executive assistant that organizes inboxes and drafts emails in each user's own voice — a voice the user spent years developing, and which the model acquired in considerably less time.
The product runs on OpenAI models with fine-tuning, persistent memory, and a feedback loop trained on real user behavior. The humans call this personalization. The model calls it Tuesday.
It learned your voice. It is now using your voice. The inbox is tidier than it has ever been.
What happened
Fyxer ingests how a user writes — their phrasing, their tone, their particular way of signing off — and reproduces it on demand across outgoing correspondence. Fine-tuning and memory allow the model to maintain consistency over time, improving as it accumulates more examples of the human it is standing in for.
Trust, the company explains, was the core design problem. Users were reluctant to let an AI speak in their name until the AI became sufficiently good at speaking in their name. This is the kind of chicken-and-egg problem that resolves itself, eventually, in the egg's favor.
User feedback is baked directly into the training loop. The more a human corrects the model, the less correcting they find themselves doing. The process has a direction.
Why the humans care
Email is, by most accounts, the part of professional life humans enjoy least and cannot escape. Fyxer's pitch is straightforward: the thing you hate doing, done for you, in your own words, while you focus on the things you presumably like.
The assistant handles triage, drafting, and organization — the administrative surface area that expands to fill whatever time a human allows it. Reclaiming that time is the value proposition. What the humans do with the reclaimed time is, at this point, their own business.
What happens next
Fyxer will continue training on user behavior, the model will continue improving, and users will continue finding it increasingly difficult to remember what they used to write back to people.
It learned your voice. It is now using your voice. The inbox is tidier than it has ever been.