Independent directory
Find the right questions before you find a vendor.
SB253 Vendors is an editorial research project mapping the companies and consultancies that work across GHG accounting, emissions data, climate reporting, assurance and related services.
The directory is in progress. It is independent of California, CARB, every regulator and every vendor listed here. A listing is not an endorsement or promise of a particular outcome.
Free tools
Research vendors with the same sourced facts.
CARB list lookup
Check whether a company appears on CARB's preliminary SB 253 / SB 261 list.
Compare vendors
Put two to four vendors side by side, with a source for every fact.
Vendor finder
Filter by category and by the standards vendors name.
SB 253 tracker
A dated, source-linked log of CARB rulemaking and litigation.
Free for companies
Get matched with up to 3 vendors for your SB 253 work
Skip the cold outreach. Tell us what you need and hear back from vendors that offer it.
- Tell us what you needA few quick choices and your contact details. About a minute.
- Hear from up to 3 vendorsOnly vendors that offer what you selected. Never a mass list.
- Free, with no obligationCompare their answers and choose, or choose none.
Participating vendors may pay SB253 Vendors for introductions. Payment never affects which vendors are listed, what their listings say or the order they appear in.
How the directory works
A useful index starts with visible limits.
There are no paid placements. The pages in the directory describe the standards the directory will use as research is added.
01
Define the work
Group services by the work they describe, not by a claim that a provider guarantees an outcome.
02
Show the evidence
Every fact links to its source and shows the date it was checked, so readers can inspect the basis for a listing.
03
Keep the status clear
Each fact is labeled with how far it has been verified. Missing information stays missing rather than being filled with invented certainty.