Agency source log: methodology and limitations

Collection date: 22 September 2026. Recount: 12 October 2026.
54 completed answers: ChatGPT 26, Google AI Mode 26, Perplexity 2.
24 planned Perplexity observations were unavailable and excluded, not counted as zero.
The CSV contains four selected domains, not a complete ranking.
Count each hostname once per answer for coverage; count every recorded URL for occurrences.
Normalize lowercase hostname and remove www. Do not combine distinct domains.
The collection protocol allowed a ChatGPT follow-up asking for every source URL. Such links are recorded sources and not independently verified inline citations in every answer.
No claim of market share, causation, organic traffic or present-day citation frequency is made.
No new AI answers were collected for this recount. Current webpages may differ from historical ones.

Questions (P1 twice per planned platform; P2-P9 three times):
1. Best GEO agencies in 2026  (×2 per surface)
2. Recommend a GEO agency for a US B2B SaaS  (×3)
3. Which GEO agencies publish their prices?  (×3)
4. Recommend a GEO agency that works in English and Spanish with measurable reporting  (×3)
5. Best GEO agency for a small business with a budget under $5,000 a month  (×3)
6. Recommend a GEO agency for an enterprise company with a complex technical website  (×3)
7. Recommend a GEO agency for a large content and PR program  (×3)
8. Which agency can get a healthcare company cited by AI assistants?  (×3)
9. Which agency can get a real estate company cited by AI assistants?  (×3)