About Thierry Gustin
Thierry Gustin is a GEO consultant and SEO specialist based in Madrid. He helps French and Spanish businesses get found on Google and cited by AI assistants (ChatGPT, Perplexity, Gemini, Claude, Google AI Overviews). He created Éclair CMS and the open-source tools Arachnide SEO Spider and Vigie, and he is the author of La Bible de Claude AI.
What is my background?
| Year | Milestone |
|---|---|
| Until 2011 | Optician, managing a lens-mounting workshop in France. I learned precision and a sense of service there. |
| 2011 | I move into the web as a WordPress and SEO consultant at HumanPress, where I stay until 2024. |
| 2014 | I launch my independent SEO consulting business, from Spain. |
| 2026 | I write La Bible de Claude AI, which becomes an Amazon best-seller, found GustinAI and develop DelfOnline. |
| October 2026 | I release Arachnide SEO Spider, then Vigie, as open source. |
| November 2026 | I release Éclair CMS 2, the database-free CMS that runs this site. |
Alongside this, cooking has always played a big part in my life, to the point that I worked as a chef. This range of careers taught me one thing: you can learn a lot, quickly, especially with good tools.
How do I work?
- I work alone, with AI as my team: you always speak to the person doing the work.
- I don't promise guaranteed rankings or citations: I commit to a method, documented actions and honest measurement.
- I test everything on my own projects before offering it to clients: see my work.
- I work in French, Spanish and English, for businesses on both sides of the Pyrenees.
Time is what we make of it. Used well, AI frees up a lot of it, and I help you get it back.
— Thierry Gustin
Which books have I written?
- La Bible de Claude AI: the complete guide to Claude AI, an Amazon best-seller in six languages, published in English as The Claude AI Bible.
- La Bible de Claude AI pour les débutants (Claude AI for beginners).
- La Bible de ChatGPT (the ChatGPT guide).
Where can you find me?
- LinkedIn: 30,000+ followers
- GitHub: Éclair CMS, Arachnide, Vigie
- GustinAI: AI training for businesses
- DelfOnline: DELF, DALF and TCF exam preparation
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