About Wunderli

Wunderli is a bootstrapped family company in Zurich, founded by Andrei Baciu and Raluca Baciu. We make an audio story app for parents: you shape the character, setting and mood from your child's ideas, then Wunderli writes and narrates the story.

Why we built it

Families often know exactly what kind of story would fit the evening. A child may be thinking about a fox, a castle or something that happened that day, while the parent knows how much time is left before lights out. Wunderli gives the parent a clear way to combine those ideas without writing the story from scratch.

The parent operates the app and makes the final choices with the child. Wunderli then creates the text and narrated audio. Once playback starts, the screen can go dark. The full sequence is on How Wunderli works.

Built in Zurich for multilingual families

Wunderli was conceived and built in Zurich by ArvenX GmbH. German, English and French are available for each story, alongside three language levels. A family can choose one language tonight and another tomorrow without changing accounts or creating a profile for the child.

Stories offer 10+, 15+ or 20+ minutes. Once a completed story is downloaded, it stays in the family's personal library and plays offline. Nothing starts automatically when it ends.

The people behind Wunderli

Andrei Baciu, Co-founder and CTO, built Wunderli's story engine. It plans, writes, checks and narrates each story.

Raluca Baciu, Co-founder and Chief Communications Officer, leads communications, brand and growth.

The company is funded by its founders. There is no larger publisher behind the product, and the two founders remain responsible for what families see, hear and read from Wunderli.

What parents can expect

Wunderli uses an adult account and does not create child profiles. The app has no third-party advertising and no ad tracking. The parent chooses from a prepared catalogue with the child instead of handing over a blank prompt. Sharing, reporting and account actions sit behind a parental gate.

These are product decisions rather than broad promises. The Child safety page explains how the app handles story creation, and the Privacy policy lists the data processing in detail.

Contact

Families can reach us through the contact page. Journalists can find founder biographies, images and product material in the press kit. Company details are listed in the imprint.