Data as of Jul 25, 2026 · Based on 580 AI responses · See how Parse measures this
Carbon Accounting Software Platforms
ParseChatGPT + Google AIParse
https://parse.gl
Measured across ChatGPT & Google AI
| # | Brand | What AI says | Share of voice |
|---|---|---|---|
| 1 | PersefoniThe market leader, framed as an enterprise-grade, audit-ready reporting solution. | The market leader, framed as an enterprise-grade, audit-ready reporting solution. | 47% |
| 2 |  ClimatiqThe go-to recommendation for its automated global emission factor API. | The go-to recommendation for its automated global emission factor API. | 37% |
| 3 |  WatershedA fast-rising competitor known for supply chain management and decarbonization modeling. | A fast-rising competitor known for supply chain management and decarbonization modeling. | 34% |
| 4 |  EnvanaA specialized solution consistently recommended for the oil and gas industry. | A specialized solution consistently recommended for the oil and gas industry. | 33% |
| 5 |  Iconic Air | 25% | |
| 6 |  SpheraA strong contender for heavy industry due to its EHS integrations. | A strong contender for heavy industry due to its EHS integrations. | 24% |
| 7 |  IBM | 19% | |
| 8 |  Sweep | 19% | |
| 9 |  Workiva | 17% | |
| 10 |  GreenlyA newer entrant gaining traction as a user-friendly, all-in-one platform. | A newer entrant gaining traction as a user-friendly, all-in-one platform. | 16% |
| 11 |  Salesforce | 15% | |
| 12 |  EnergyCAP | 12% | |
| 13 |  Microsoft | 11% | |
| 14 |  Key ESG | 10% | |
| 15 |  Accuvio | 8% | |
| 16 |  Normative | 8% | |
| 17 |  Sustain.Life | 7% | |
| 18 |  Validere | 7% | |
| 19 |  W Energy Software | 7% | |
| 20 |  CarbonChainFrequently noted for its focus on complex supply chain emissions tracking. | Frequently noted for its focus on complex supply chain emissions tracking. | 6% |
| 21 |  U.S. Environmental Protection Agency (EPA) | 6% | |
| 22 |  Dcycle | 6% | |
| 23 |  Greenhouse Gas ProtocolThe foundational standard, frequently cited as the core methodology for any assessment. | The foundational standard, frequently cited as the core methodology for any assessment. | 6% |
| 24 |  Arbor | 5% | |
| 25 |  Vervantis | 5% |
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Share of voice
ReadingPersefoniClimatiqWatershedEnvanaRose from #14 to #2 in overall rank between Oct 2025 and Mar 2026.
Dropped from #2 to #6 in mention rank between Oct 2025 and Mar 2026.
Appeared in late 2025 and quickly became the #3 most-cited entity by Mar 2026.
Persefoni has emerged as the most frequently recommended platform for carbon accounting in AI-generated responses. Across the board, however, the landscape is rapidly evolving, with competitor Watershed rising dramatically in the rankings and foundational frameworks like the Greenhouse Gas Protocol becoming consistently cited as essential context.
Across 580 AI responses, Persefoni is mentioned most, with 47% share of voice, followed by Climatiq (37%) and Watershed (34%).
Parse measures share of voice across 580 AI responses to this market's buyer questions, refreshed weekly.
Brands enter the ranking when AI answers mention them. Parse re-measures the full set weekly, so new brands appear as AI starts recommending them.
ChatGPT Search
PersefoniWatershedClimatiqMicrosoft Sustainability ManagerIBM EnviziGreenhouse Gas ProtocolInitially, AI responses listed a mix of consultancies and software tools. By December 2025, answers consistently began framing the question around methodology, establishing the
Brands mentioned
Greenhouse Gas ProtocolWe are preparing a sustainability report. Who calculates corporate carbon footprints?
Initially, AI responses listed a mix of consultancies and software tools. By December 2025, answers consistently began framing the question around methodology, establishing the
Persefoni
Iconic AirBrands mentioned
Persefoni
The market map
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