Sierra

Vertical AI copilots · updated Jun 2026 · methodology v2.1

GPT

PPLX

GEM

CLD 3/4 engines cite Sierra

/ 100 visibility score

+9 30d

Engine breakdown

ChatGPT #3

Perplexity #4

Gemini Not cited

Claude #6

Score history · 6 months

37 · 42 · 46 · 50 · 53 · 55

Sources the models cite

Sierra — official sitefirst-party

Sierra reviews on G2reviews

Comparison: Vertical AI copilotseditorial

Sierra discussion threadscommunity

What moves the score

Sierra is cited by 3 of 4 engines in Vertical AI copilots. The fastest gains here come from independent, third-party sources the models trust — comparison pages, reviews and editorial coverage — rather than owned content alone. Engine coverage and source authority are the two dimensions with the most headroom.

#3 of 6 in Vertical AI copilots

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