What channels actually work for a solo founder with a zero-euro budget? We rank every free marketing channel as a live tier list - S down to F - arguing each placement instead of reading a checklist. Founder-led content and answering in communities take the top spot: fastest trust, zero spend, and it compounds. Traditional SEO drops to the bottom - Google's zero-click era killed it, and what's left is GEO, getting cited by the AI engines. Short-form video, warm-base newsletters, and influencer swaps land in the middle; random cold email is a hard F. Throughout, the real unlock is AI doing the grunt work so one person can run two or three channels at once - but we make the case that AI ghostwriting is a dead strategy, and "AI blindness" is now a real factor. We close on why agents have no money, and why you still have to talk to real people in human language.