Has anyone worked with a german seo/geo agency before?

I’ve been running SEO for a small SaaS company in the EU market, and lately I’ve been hearing more about this whole “GEO” (Generative Engine Optimization) trend, optimizing not just for Google, but for AI-generated search results. I came across a German agency called TRYSEO, and they seem to focus on exactly that, traditional SEO combined with AI visibility.

Their approach looks interesting. They offer audits, on-page work, link building, and what they call “GEO optimization”, supposedly helping your brand show up in AI-driven summaries. I’ve mostly handled SEO in-house, but the international aspect and the AI angle make me curious.

Has anyone here worked with a german seo agency? Did you actually see any difference in visibility or leads from AI-based search tools (like ChatGPT or Perplexity)?