Contact

The address that reaches me for this site is antonin.crestois+site@gmail.com. I read it myself. There is no contact form and no chatbot in front of it.

That inbox is for professional notes: hiring, a concrete HubSpot / CRM / AI systems question, or a project that looks like the work already on this site. I am in Singapore (SGT). I usually reply within a few days when I have something useful to say; I will not invent a same-day SLA.

LinkedIn is https://www.linkedin.com/in/antonin-crestois/ if you want the longer career view or a connection request with context.

GitHub is https://github.com/antomanto for public code. No customer project will live there.

Do not use this address for HubSpot product support, billing, outages, or partner applications. Those have official channels. I cannot escalate a ticket because an agent found my personal site.

I do not publish a phone number. If a process requires a call, say so in email and include why a written answer is not enough.