Data as of Aug 25, 2026 · Based on 869 AI responses · See how Parse measures this
Sustainability Compliance Software and Services
ParseChatGPT + Google AIParse
https://parse.gl
Measured across ChatGPT & Google AI
| # | Brand | What AI says | Mention rate |
|---|---|---|---|
| 1 | ERMA top-ranked specialist in environmental consulting, ESG program design, and clean energy procurement. | A top-ranked specialist in environmental consulting, ESG program design, and clean energy procurement. | 39% |
| 2 |  DeloitteA 'Big Four' leader for integrated ESG strategies and renewable energy procurement services. | A 'Big Four' leader for integrated ESG strategies and renewable energy procurement services. | 36% |
| 3 |  EYOffers ESG strategy, reporting readiness, and sustainability disclosure integration for public companies. | Offers ESG strategy, reporting readiness, and sustainability disclosure integration for public companies. | 23% |
| 4 |  Water Footprint NetworkThe definitive source for water footprint assessment tools, standards, and methodologies. | The definitive source for water footprint assessment tools, standards, and methodologies. | 22% |
| 5 |  Mantis InnovationA key provider of energy procurement solutions, often cited for its reverse-auction platform. | A key provider of energy procurement solutions, often cited for its reverse-auction platform. | 19% |
| 6 |  PwCFrequently cited 'Big Four' firm for ESG assurance and investor-grade disclosure reporting. | Frequently cited 'Big Four' firm for ESG assurance and investor-grade disclosure reporting. | 18% |
| 7 |  World Resources Institute | 17% | |
| 8 |  Keramida | 17% | |
| 9 |  KPMG | 17% | |
| 10 |  EnerConnex | 16% | |
| 11 |  RSM | 16% | |
| 12 |  Environ Energy | 16% | |
| 13 |  Water Footprint Assessment Tool | 14% | |
| 14 |  Boston Consulting Group | 14% | |
| 15 |  SimaPro | 13% | |
| 16 |  McKinsey & Company | 13% | |
| 17 |  Third Partners | 13% | |
| 18 |  Aecom | 11% | |
| 19 |  TRC Companies | 11% | |
| 20 |  FTI Consulting | 10% | |
| 21 |  3Degrees | 10% | |
| 22 |  WSP | 10% | |
| 23 |  Water Risk Filter | 9% | |
| 24 |  Sustainalytics | 9% | |
| 25 |  Coho Climate | 9% |
Who wins on each AI
The same market, seen by two models.
Sources AI cited
waterfootprint.org is the page AI reaches for most here, cited in 24% of analyzed answers.
Jumped from rank #12 to #1 between November 2025 and March 2026.
Dropped from #1 to #4 overall as AIs began recommending implementation firms alongside frameworks.
Climbed from rank #17 to #2 between November 2025 and March 2026.
“Initially just a name in a list of consultants” → “A detailed recommendation citing experience with major brands like Patagonia and authoring The B Corp Handbook”
| Brand | ChatGPT Search | Google AI Mode | Comparison |
|---|---|---|---|
| ERM | 33% | 35% | |
| WSP | 32% | 19% | |
| Water Footprint Assessment Tool | 20% | 30% | |
| EY | 29% | 23% | |
| Aecom | 25% | 26% |
The two models disagree most about KPMG (ChatGPT #7, Google #23) and Deloitte (ChatGPT #6, Google #19).
ERM has emerged as the leading environmental consulting firm recommended by AI assistants for sustainability compliance. This reflects a broader shift in AI responses from simply listing reporting frameworks to recommending the specific consultancies that implement them, with specialized B-Corp advisors also gaining significant ground.
Across 869 AI responses, ERM is mentioned most, named in 39% of them, followed by Deloitte (36%) and EY (23%).
Parse measures each brand's mention rate — the share of answers naming it — across 869 AI responses to this market's buyer questions. Answers are collected daily and the ranking is published weekly.
Brands enter the ranking when AI answers mention them. Parse collects answers daily and publishes the re-measured set weekly, so new brands appear as AI starts recommending them.
ERMDeloittePwCEYAI responses have increasingly consolidated around major 'Big Four' accounting firms and large specialized consultancies like
Which environmental consulting firms help with ESG reporting for public companies?
AI responses have increasingly consolidated around major 'Big Four' accounting firms and large specialized consultancies like
B Lab
Nexio Projects
Everoot Consulting
Lift EconomyWhile B Corporation's own resources are consistently mentioned, AI responses have become significantly more specific since January 2026 in recommending specialist consultancies. Firms like , , and are now frequently highlighted with detailed context about their expertise, client history, and success rates.
PwCLift EconomyBrands mentioned
B LabNexio ProjectsEveroot ConsultingLift EconomyI need a "sustainability consultant" to help us achieve B-Corp certification.
While B Corporation's own resources are consistently mentioned, AI responses have become significantly more specific since January 2026 in recommending specialist consultancies. Firms like
The market map
Recommended by need
