I build AI-native apps, and help companies automate their administrative work.
Onnox is a one-person studio in Utrecht, the Netherlands. Everything on this page was built with Claude Code.
Products
Versta
Live captions for loud places. Someone speaks into your iPhone's microphone and you read along with what they say. Made for bars, terraces and the dance floor, where you would otherwise not understand each other. Speech recognition runs on the phone itself.
Receptenradar
A search engine over Dutch food blogs. Search more than twenty blogs at once and filter by what you have in the house, how much time you have and what you eat. No ads.
For companies
A lot of office work is retyping, summarising, sorting and checking. An AI agent can take over part of that, provided it is set up properly. That is where I help.
- Advice. Working out together which tasks lend themselves to automation, and which do not.
- Custom tools. Building a tool that fits your files, systems and way of working.
- Start small. One process, a result you can check, and only then the next step.
About
I'm Onno ter Wisscha, an innovation consultant and analyst who now builds software together with AI agents. I'm not a traditional programmer: Claude is my co-builder. At night, Claude agents turn product ideas into working iOS apps and web products, test them, and report back by morning.
Versta started as a solution for myself. I have severe hereditary hearing loss, and in noisy places I drop out of the conversation. Others now use the app too: people who are hard of hearing, their families, and people with perfectly good hearing at a party.