All case studies
Stummeyer
+871% AI visibility in 10 months
From 7.5% to 72.8% GEO visibility across all models (peak Juni 2026, +65.3 pp) · Aug 2025 – Juli 2026.
Stummeyer
Result: visibility per AI system
start → peak · Juni 2026
All models (avg) — headline
+871%
relative growth
Start 7.5%Peak 72.8%
+65.3 percentage points across all models
StartHöchstwert
Google AI Overviews
+80,2 pp
0,4 %
80,6 %
ChatGPT
+56,1 pp
5,1 %
61,2 %
Perplexity
+59,6 pp
17 %
76,6 %
Key facts
- Industry
- AI & Keynote Speaking
- Company size
- Personal brand
- Domain
- stummeyer.de
- Tracking period
- Aug 2025 – Juli 2026 (10 months)
- Tracked AI answers
- 14.525
- AI systems
ChatGPT
Perplexity
Google AI Overviews
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