Compare 13 Persefoni implementation partners delivering enterprise carbon accounting rollouts, greenhouse gas inventory builds across Scope 1, Scope 2, and Scope 3, supplier engagement programmes, and the assurance and reporting workflow for CSRD, SEC climate rules, CDP, TCFD, and ISSB IFRS S2. Engagements cover the organisational and operational boundary setting under the GHG Protocol, the activity data ingestion from ERP, procurement, fleet, facilities, and travel systems, the emission factor library configuration, the Scope 3 category mapping with spend-based and activity-based methods, the supplier engagement workflow for primary data collection, the assurance audit trail for limited and reasonable assurance, the disclosure mapping for CSRD ESRS E1, SEC climate, CDP, and TCFD, and the operational handover including controls aligned with SOX-style governance. Listings cover Big Four sustainability practices, climate consulting boutiques, India-heritage SIs, ERP integration specialists, and the verification firms that pair with Persefoni implementation. No partner pays for placement on this directory.
Persefoni programmes break into four workstreams. Boundary and methodology, where the partner sets the organisational and operational boundary under the GHG Protocol, defines the consolidation approach (operational, financial, or equity share), maps the Scope 1, Scope 2, and Scope 3 categories applicable to the organisation, and selects the emission factor libraries (DEFRA, EPA, IEA, EXIOBASE) by region. Data ingestion and integration, where the partner integrates activity data from ERP (SAP, Oracle, Workday), procurement (Coupa, Ariba), fleet and facilities, travel and expense (Concur, SAP), and energy and utility billing, designs the spend-based to activity-based Scope 3 upgrade path, and stands up the supplier engagement workflow for primary data. Calculation and assurance, where the partner configures the calculation methodology by category, builds the audit trail for limited and reasonable assurance under ISAE 3000 and ISAE 3410, reconciles emissions to financial accounts, and stands up the controls model aligned with the SOX-style governance that CSRD and SEC climate require. Disclosure and reporting, where the partner maps Persefoni outputs to CSRD ESRS E1, SEC climate disclosures, CDP, TCFD, ISSB IFRS S2, and the SBTi target-setting workflow.
Three procurement archetypes recur. Big Four sustainability practices (PwC, EY, Deloitte, KPMG) lead at organisations preparing for CSRD limited or reasonable assurance, SEC climate filings, or material climate-related disclosures, where the audit firm relationship and the assurance methodology drive the engagement. Climate consulting boutiques (Anthesis, South Pole, ERA, Ramboll, Ricardo) lead on the deep methodology work for Scope 3, the supplier engagement and primary data collection, and decarbonisation strategy alongside reporting. India-heritage SIs (TCS, Infosys, Wipro) lead at organisations where the ERP integration, multi-region data ingestion, and managed run for global subsidiaries matter more than methodology depth. Friction point: Persefoni pricing scales with revenue band and supplier count, and the platform value depends heavily on data quality upstream. Organisations with poor procurement category coding, inconsistent fleet records, or fragmented travel systems should expect the data-foundation workstream to take 3-6 months before useful disclosure is possible, and assurance readiness adds another 6-12 months on top of the platform rollout.
For complementary research see carbon accounting platforms, ESG reporting platforms, supplier sustainability platforms, energy management platforms, and GRC platforms. For adjacent services see CSRD reporting services, Workiva implementation, SAP implementation, Coupa implementation, IT governance and compliance, and data engineering and analytics.
Tell us what you're evaluating and we'll send a tailored shortlist of vendors that actually fit — no vendor funding, no pay-to-play.
6,000+ vendors · 893 comparisons · 48 country guides · Independent & vendor-neutral