Vendors by standard

Vendors that name ISSB standards (IFRS S1 and S2)

Sustainability disclosure standards issued by the International Sustainability Standards Board: IFRS S1 for general sustainability disclosures and IFRS S2 for climate-related disclosures.

Sources checked: September 20, 2026

The 12 vendors below name ISSB standards (IFRS S1 and S2) in the sources we recorded. Naming a standard does not mean a vendor is certified, accredited or approved under it. Listings are alphabetical and are not a ranking. Confirm details directly with each vendor.

12 vendors that name ISSB standards (IFRS S1 and S2)

• BDO USA

  Accounting firm describing limited and reasonable sustainability assurance, readiness assessments, and GHG inventory support, and referencing SB 253 reporting.

  Standards the vendor names: AICPA; ISAE; GHG Protocol; ISSB; ESRS

  Source: Assurance levels, standards named, SB 253 mention, service components (accessed September 20, 2026)

  Assurance and verification

• Cority

  EHS and sustainability software offering GHG emissions tracking across Scope 1-3, ESG targets and KPIs, and reporting to global frameworks.

  Standards the vendor names: GRI, CDP, SASB, TCFD, CSRD; ISSB

  Source: Homepage: sustainability and EHS modules (accessed September 20, 2026)

  ESG and climate reporting platforms

• Deloitte (US)

  Accounting and advisory firm whose US page describes sustainability assurance integrated with financial audit, plus GHG inventory and carbon assessment services.

  Standards the vendor names: ISSB; CSRD; ESRS; GRI

  Source: Vendor page: services and standards named (accessed September 20, 2026)

  Assurance and verification

• ERM

  Sustainability consultancy whose pages describe sustainability reporting and disclosure support and GHG accounting work, including a private-equity GHG standard using the GHG Protocol.

  Standards the vendor names: GHG Protocol; PCAF Standard; CSRD; ESRS; IFRS/ISSB; GRI; SASB; TCFD; CDP

  Source: Reporting and disclosure services, frameworks named (accessed September 20, 2026)

  GHG accounting consulting

• KERAMIDA

  Environmental consultancy offering GHG assessments and inventories (Scopes 1-3), verification services, and SB 253 and New York reporting assistance.

  Standards the vendor names: GHG Protocol; ISO 14064-3; ISO 14067; ISO 14040/14044; CDP; SBTi; TCFD; IFRS S2; CSRD; AA1000

  Source: Services, standards, credentials statement, address (accessed September 20, 2026)

  GHG accounting consulting

• Novisto

  Sustainability management software for ESG data collection, carbon emissions measurement, peer benchmarking and multi-framework disclosure reporting.

  Standards the vendor names: IFRS S1/S2; GRI; SASB; CSRD; CDP; TCFD; TNFD; HKEX; EU Taxonomy; SFDR PAI; TCFD and IFRS S2

  Source: Homepage: features and frameworks (accessed September 20, 2026)

  ESG and climate reporting platforms

• SAP Sustainability Solutions

  SAP's ERP-connected sustainability portfolio covering carbon accounting through a green ledger, footprint management and ESG steering and reporting.

  Standards the vendor names: CSRD; CBAM, IFRS S1/S2, SBTi, CDP

  Source: Sustainability solutions overview (accessed September 20, 2026)

  Carbon accounting software

• South Pole

  Climate consultancy whose GHG accounting page describes inventory support (notably Scope 3), data-gap work and help with disclosure frameworks.

  Standards the vendor names: CSRD; IFRS S2; ASRS; TCFD; CDP

  Source: GHG accounting services and frameworks named (accessed September 20, 2026)

  GHG accounting consulting

• Sweep

  Platform for centralizing carbon and ESG data across a business and its value chain, with supplier data collection and multi-framework reporting templates.

  Standards the vendor names: GHG Protocol; CSRD; CDP; ISSB; California SB 253 and SB 261; UK SRS, GRI, SASB, FDR, PCAF

  Source: Homepage: features and frameworks named (accessed September 20, 2026)

  Carbon accounting software

• Terrascope

  Software for measuring and reducing corporate and product carbon footprints, with AI-assisted data ingestion, gap filling and reporting.

  Standards the vendor names: GHG Protocol; CDP, TCFD, CSRD, GRI, ISSB, SBTi, FLAG

  Source: Homepage: features, frameworks, address (accessed September 20, 2026)

  Carbon accounting software

• Watershed

  Enterprise sustainability platform for measuring emissions, drafting sustainability reports and planning reductions, with AI-assisted data tools.

  Standards the vendor names: CSRD; CDP; ISSB; California SB 253 and SB 261

  Source: Homepage: features, frameworks named, customer list (accessed September 20, 2026)

  Carbon accounting software

• Workiva

  Reporting and disclosure platform whose sustainability offerings include Workiva Carbon for GHG accounting, plus ESG reporting, double materiality and data collection.

  Standards the vendor names: GHG Protocol; CSRD, ISSB, California SB 253 and SB 261; CDP and GRI; ESEF

  Source: Homepage: sustainability offerings, HQ address (accessed September 20, 2026)

  ESG and climate reporting platforms

Compare the first four side by side or combine standards in the vendor finder.