Vendor comparison
Greenly alternative: a ledger-first carbon accounting option for US companies
Last updated July 2026. Greenly is a real and capable product, and this page says where it wins as well as where it does not fit. Both tools do genuine Scope 1, 2 and 3 carbon accounting. The difference is starting point and buyer. Greenly is questionnaire- and data-collection-first, with deep European regulatory coverage and a factor library it puts at around 300,000 factors. We are ledger-first and US-regulation-first: the inventory is postings built from your AP and utility exports, and the design center is the evidence trail an assurance review samples against.
| Greenly | Carbonaccounting.ai | |
|---|---|---|
| Primary buyer | European SMEs and mid-market, first footprint | US companies triggered by SB 253, customers or investors |
| Starting point | Data collection and activity questionnaires | Your accounts payable and utility ledger |
| Regulatory focus | CSRD, European frameworks, double materiality | California SB 253 and SB 261, plus CSRD and CBAM |
| Emission factors | Large library (company cites ~300,000) | Documented factor per line, versioned for restatement |
| Scope 3 method | Activity and spend data collection | Spend-based screening first, graduating to activity data |
| Try before contact | Demo on request | Run the classifier on your own lines, no signup |
| Status and pricing | Established product; pricing quote-based | Early access; planned pricing published, nothing charged today |
Live demo · Scope Classifier
No signup neededSee your own spend classified to GHG Protocol scopes in about a minute.
When Greenly is the better choice
If you are a European SME doing carbon accounting for the first time, want an established vendor with a broad factor library and a mature CSRD double-materiality workflow, and you value a guided data-collection experience with advisory support, Greenly is a strong pick and probably the more complete product for that job today. It has been built around exactly that user for years. We are honest about being in early access, and we are not going to claim a European SME is better served by a US-regulation-first tool than by one designed for them.
When Carbonaccounting.ai fits better
The fit flips when your trigger is American and your data lives in your ledger. If you are a US company over $1 billion in revenue facing the SB 253 deadline, or a supplier answering a customer's emissions questionnaire, the fastest path to a defensible number is to classify the AP export you already have rather than launch a data-collection project. That is what our carbon accounting software does: AI drafts the scope and category for every line with a confidence level, a human reviews the low-confidence tail, and every figure keeps a link to the invoice behind it. You can watch that happen on your own data in the demo above.
How much does Greenly cost?
Greenly does not publish standard pricing; like most carbon accounting vendors it quotes based on company size, scope coverage and the modules you need, so the real figure comes from a sales conversation. Anyone printing an exact Greenly price is guessing. We take the opposite approach on transparency: our planned pricing is published on the pricing page, and nothing is charged during early access. Compare the wider field on best carbon accounting software, or the enterprise-heavy option on the Sweep alternative page.
Greenly facts here summarize the company's publicly described product and positioning as of July 2026 and may change; verify current features and pricing with Greenly directly. This comparison is our honest view, not Greenly's. Our product is in early access and capabilities are described as planned.
See your own footprint classified in about a minute.
Run the live demo on a sample or on your own spend lines. If it earns it, request early access.