ESG and sustainability consulting
ThisRock ESG
ESG consultancy in Ontario supporting EcoVadis, CDP, SBTi and climate reporting work, plus sustainability training.
California SB 253/261 software and service providers
Compare providers that support California SB 253/261 reporting, from software platforms to consultants and assurance firms.
What is California SB 253/261?
California’s SB 253 (Climate Corporate Data Accountability Act) requires large companies that do business in California to report Scope 1 and 2 emissions, then Scope 3, with third-party assurance. SB 261 requires a report on climate-related financial risk.
Who it applies to
SB 253: US entities with over $1 billion in annual revenue that do business in California. SB 261: over $500 million revenue. “Doing business in California” has a specific legal meaning, so confirm it with an adviser.
By category
- Carbon accounting and emissions management (6)
- SBTi and net-zero target setting (6)
- ESG and sustainability consulting (5)
- GHG inventory and verification (4)
- ESG reporting and disclosure software (3)
- Sustainable finance and EU Taxonomy tools (2)
- Training and capacity building (2)
- ESG data and ratings platforms (1)
- Legal and regulatory advisory (1)
- Supply chain ESG and due diligence (1)
Training and capacity building
London Reporting Academy
London academy running professional courses on ESRS, ISSB, UK SRS, GRI, TNFD and California climate reporting.
Carbon accounting and emissions management
Sinai
Enterprise carbon and energy management platform with measurement, supplier engagement, reporting and reduction modules.
ESG and sustainability consulting
Sustridge
Sustainability consultancy offering GHG inventories, double materiality assessments, SBTi targets and California climate disclosure support.
Legal and regulatory advisory
Covington & Burling
International law firm advising on ESG disclosure and supply chain regulation.
ESG data and ratings platforms
Climate X
Physical climate risk data and analytics that translate risk into asset and portfolio financial loss metrics.
ESG and sustainability consulting
Governance & Accountability Institute
New York ESG and sustainability consultancy for reporting, materiality, GHG inventories and SBTi target setting.
GHG inventory and verification
KERAMIDA
Indiana-based environmental firm providing corporate GHG inventories, verification, decarbonization roadmaps and climate disclosure support.
Carbon accounting and emissions management
Carbonfact
Carbon accounting and product life cycle assessment software for apparel, footwear and textile brands and their suppliers.
Carbon accounting and emissions management
Sprih
AI-based sustainability platform for carbon accounting, supplier engagement and compliance reporting, including India BRSR filings.
Carbon accounting and emissions management
Carbon Footprint Ltd
UK carbon footprint software, net zero consultancy and rated carbon credits for businesses of all sizes.
ESG reporting and disclosure software
Novata
ESG data and reporting platform for private markets covering SFDR, CSRD, carbon accounting and LP reporting.
Carbon accounting and emissions management
Carbonhound
Toronto carbon management software for measuring, reducing and reporting emissions, with reports aligned to Canadian, US and EU rules.
What to look for in a California SB 253/261 provider
- GHG Protocol Scope 1, 2 and 3 accounting with a full audit trail.
- Verification and assurance support from an accredited provider.
- Reporting formats aligned with CARB guidance.
Common questions about California SB 253/261
Who must report under SB 253?
US companies with over $1 billion revenue that do business in California. The first report, covering Scope 1 and 2, is due 10 November 2026.
Sources
- CARB guidance and deadline change (Sidley, June 2026)
- Ninth Circuit injunction on SB 261 (Harvard Law School Forum)
This page is general information, not legal advice.