Published directory

Categories

Explore the kinds of services and data vendors describe in their published profiles.

Last reviewed: September 20, 2026

• Assurance and verification

  Organizations that state they offer verification or assurance services related to greenhouse gas information. Accreditation details, where shown, are as displayed on the cited source page on the date shown; confirm with the accrediting body and the provider.

  18 vendors

• Carbon accounting software

  Software for calculating and tracking greenhouse gas emissions from organizational data. Listed vendors describe their own capabilities; SB253 Vendors has not tested, scored or ranked them.

  13 vendors

• Emissions data and factors

  Providers of emissions factor data and related datasets used as inputs to greenhouse gas calculations, as described by the providers.

  2 vendors

• ESG and climate reporting platforms

  Platforms for collecting sustainability data and preparing disclosures. Listed vendors describe their own capabilities; SB253 Vendors has not tested, scored or ranked them.

  8 vendors

• GHG accounting consulting

  Consultancies that state they advise on greenhouse gas inventories, reporting readiness and related programs.

  10 vendors