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Antoine Duno

Independent developer, France

Antoine Duno

Small software products, built and run by one person.

I make software products by myself. I write the code, run the servers, do the SEO, handle the billing and answer the support emails.

Most of them fix one narrow problem that people already search for. I ship the smallest useful version, watch what real visitors do with it, and keep going with whatever works.

One of them has been sold. The others are live and still mine.

Work

5

Bullynx

AI for traders

Upload a screenshot of any trading chart and get a written technical analysis back: key levels, indicators and scenarios with probabilities. The advisor remembers your strategy.

The Passport Photo Maker

Photo tool

Passport and visa photos that pass the official checks. Take the photo at home and the tool crops it to the country's exact size, swaps the background and checks it before you pay.

Piano to Sheet Music

Music AI

Upload a piano recording and get sheet music back as a PDF, with MIDI and MusicXML files, in a few minutes.

Cross Stitch Pattern Generator

Craft tool

Turns a photo into a cross stitch chart you can actually use, with real DMC thread numbers, symbols that are easy to read and skein counts based on your own stitch counts.

CineRads

AI videoCo-founded

Paste a product page and get TikTok slideshows back, with hooks, captions and automatic posting. No filming, no editing.

Exited

1

Zeriflow

Sold

A security tool that finds vulnerabilities in your code, writes the fix and opens the pull request. I built it, grew it and sold it in 2026.