EY-Parthenon vs Oliver Wyman:Which is more popular?
In September 2026, Oliver Wyman had more branded searches than EY-Parthenon among consulting firms worldwide. Oliver Wyman had about 90,500 branded searches, while EY-Parthenon had 60,500. Oliver Wyman made up 1.6% of all consulting firm searches we track, and EY-Parthenon accounted for 1%. When we asked ChatGPT and Google AI Overviews about consulting firms, EY-Parthenon and Oliver Wyman each appeared in two of the four answers. Oliver Wyman was mentioned before EY-Parthenon in every answer that named either.
Who do people search for more?
Oliver Wyman, about 50% more searches than EY-Parthenon
Who does AI mention more?
Both were mentioned in 2 of 4 answers.
Who does AI recommend more?
Oliver Wyman, named ahead of EY-Parthenon in 2 of 2 answers
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Top consulting firms in ChatGPT and Google AI Overviews
In three ChatGPT questions and one Google AI Overview, EY-Parthenon and Oliver Wyman were each mentioned in two out of four: in two of the three ChatGPT answers, but not in the Google AI Overview. Oliver Wyman was listed before EY-Parthenon in every answer that named either.
Most recommended by AI
Brands get a higher ranking if they are mentioned earlier in the answers.
McKinsey & Company1st
BCG2nd
Bain & Company3rd
PwC4th- Oliver Wyman5th
Deloitte6th
EY-Parthenon7th
Kearney8th
L.E.K. Consulting9th
Accenture10th
Mentioned by AI
Each dot is one answer, filled in when that answer mentions the brand.
- BCG4 of 4Named in 3 of 3 ChatGPT answersNamed in 1 of 1 Google answers
- McKinsey & Company4 of 4Named in 3 of 3 ChatGPT answersNamed in 1 of 1 Google answers
- Bain & Company4 of 4Named in 3 of 3 ChatGPT answersNamed in 1 of 1 Google answers
- Deloitte3 of 4Named in 2 of 3 ChatGPT answersNamed in 1 of 1 Google answers
- PwC3 of 4Named in 2 of 3 ChatGPT answersNamed in 1 of 1 Google answers
- Accenture2 of 4Named in 1 of 3 ChatGPT answersNamed in 1 of 1 Google answers
- Oliver Wyman2 of 4Named in 2 of 3 ChatGPT answersNamed in 0 of 1 Google answers
- EY-Parthenon2 of 4Named in 2 of 3 ChatGPT answersNamed in 0 of 1 Google answers
- L.E.K. Consulting2 of 4Named in 2 of 3 ChatGPT answersNamed in 0 of 1 Google answers
- Kearney2 of 4Named in 2 of 3 ChatGPT answersNamed in 0 of 1 Google answers
See every answer about consulting firms
4 answers
Asked ChatGPT
“Which consulting firm should I hire?”
Asked ChatGPT
“What are the best consulting firms?”
Asked ChatGPT
“What's the best consulting firm for business strategy?”
Searched Google, AI Overview
“consulting firms”
Google showed no AI Overview for this search.
Searched Google, AI Overview
“business consulting firm”
Brands are shown in the order each answer named them. The survey took place in the United States on October 19, 2026.
Is EY-Parthenon or Oliver Wyman more popular in search?
This chart shows how often people search Google for EY-Parthenon and Oliver Wyman by name. Each line represents a brand's share of searches for all ten consulting firms we track, month by month, from English-language searches worldwide.
Share of searches by month for Oliver Wyman, EY-Parthenon. The figures are in the table below the chart.
View monthly share of searches table
| Month | Deloitte | Accenture | PwC | BCG | McKinsey & Company | Bain & Company | Oliver Wyman | EY-Parthenon | L.E.K. Consulting | Kearney |
|---|---|---|---|---|---|---|---|---|---|---|
| Oct 2025 | 30.4% | 24.9% | 16.6% | 10.8% | 9.1% | 5% | 1.5% | 1% | 0.37% | 0.26% |
| Nov 2025 | 31.7% | 26% | 17.3% | 9.2% | 7.8% | 5.2% | 1.3% | 0.86% | 0.31% | 0.22% |
| Dec 2025 | 24.2% | 29.8% | 19.8% | 8.7% | 8.9% | 6.1% | 1.2% | 0.8% | 0.24% | 0.21% |
| Jan 2026 | 27.4% | 27.4% | 18.3% | 9.7% | 8.2% | 5.9% | 1.7% | 0.9% | 0.27% | 0.25% |
| Feb 2026 | 27.8% | 27.8% | 18.5% | 9.9% | 8.3% | 5% | 1.4% | 0.92% | 0.27% | 0.25% |
| Mar 2026 | 26.9% | 26.9% | 17.9% | 9.5% | 9.8% | 5.8% | 1.6% | 1.1% | 0.26% | 0.24% |
| Apr 2026 | 27.3% | 27.3% | 18.2% | 9.7% | 10% | 4.9% | 1.3% | 0.9% | 0.27% | 0.25% |
| May 2026 | 28.7% | 28.7% | 15.8% | 10.2% | 8.6% | 5.1% | 1.4% | 0.95% | 0.28% | 0.21% |
| Jun 2026 | 29.1% | 29.1% | 16% | 9% | 8.7% | 5.1% | 1.4% | 0.96% | 0.29% | 0.23% |
| Jul 2026 | 29.1% | 29.1% | 16% | 9% | 8.7% | 5.1% | 1.4% | 0.96% | 0.29% | 0.23% |
| Aug 2026 | 28.5% | 28.5% | 15.6% | 8.8% | 8.5% | 7.2% | 1.4% | 0.94% | 0.34% | 0.24% |
| Sep 2026 | 31.8% | 26% | 17.4% | 9.2% | 7.8% | 4.6% | 1.6% | 1% | 0.31% | 0.22% |
How has the EY-Parthenon and Oliver Wyman comparison changed over the last 12 months?
3 findings
- Oliver Wyman was ahead of EY-Parthenon in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, EY-Parthenon’s share of searches among consulting firms worldwide held steady at 1%, and its estimated monthly branded searches held steady at 60.5K.
- Across the 12 months ending September 2026, Oliver Wyman’s share of searches among consulting firms worldwide moved from 1.5% to 1.6%, and its estimated monthly branded searches held steady at 90.5K.
How did search popularity change for consulting firms worldwide in September 2026?
0 changes
Neither EY-Parthenon nor Oliver Wyman moved beyond provider rounding among consulting firms in September 2026.
How are branded searches counted?
2 search terms
Brandwave collects information about searches that people make online using EY-Parthenon’s and Oliver Wyman’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.
EY-Parthenon
1 branded search term
- ey parthenon
Oliver Wyman
1 branded search term
- oliver wyman
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