Best CO2 AI Alternatives in 2026
The top CO2 AI alternatives are IBM Envizi, ACT Group Decarbonization Platform and CarbonTool: 15 carbon accounting software our editors would look at instead of CO2 AI, in our ranking order.
CO2 AI: A broad carbon accounting platform for corporate, product, and supply-chain emissions. Where it falls short: pricing is handled through contact sales.
Switching from CO2 AI? For most carbon accounting software buyers the best CO2 AI alternative is IBM Envizi, built for large enterprises needing mature ESG infrastructure. Persefoni has a free plan, which CO2 AI does not.
Why People Look for a CO2 AI Alternative
- Pricing is handled through contact sales
- No free plan is offered
- Its enterprise breadth may exceed narrower accounting needs
- No free plan — 2 of the alternatives below have it
Quick Picks by What You Need
- Best overallIBM Envizi9.4
Large enterprises needing mature ESG infrastructure
Visit IBM Envizi - Best free optionPersefoni8.9
Has a free plan (CO2 AI has none)
Visit Persefoni
All 15 CO2 AI Alternatives, Ranked
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
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Best forLarge enterprises needing mature ESG infrastructure
- Better than CO2 AI:
- Editor score 9.4 vs 7.8
A broad Scope 1–3 platform for organizations with complex sustainability data needs.
- API access
9.4/10★★★★★Visit IBM Envizi -
Best forEnd-to-end decarbonization and supplier programs
- Better than CO2 AI:
- Editor score 9.3 vs 7.8
An end-to-end platform for carbon accounting, supplier programs and renewable-energy procurement.
- API access
9.3/10★★★★★Visit ACT Group -
Best forOrganizations needing affordable audit-ready accounting
- Better than CO2 AI:
- Editor score 9.2 vs 7.8
Broad Scope 1–3 accounting and reporting from €2,000 per organization annually.
- API access
9.2/10★★★★★Visit CarbonTool -
Best forCompanies prioritizing emissions-factor depth
- Better than CO2 AI:
- Editor score 9.1 vs 7.8
A Scope 1–3 platform with deep emissions-factor coverage, supplier engagement, and audit-ready reporting.
- API access
9.1/10★★★★★Visit Normative -
Best forEnterprises needing flexible climate management
- Better than CO2 AI:
- Editor score 9.0 vs 7.8
A broad carbon accounting platform for enterprise measurement, disclosure, and reduction planning.
- API access
9.0/10★★★★☆Visit Watershed -
Best forTeams seeking a free entry point
- Better than CO2 AI:
- Free plan
- Editor score 8.9 vs 7.8
A free entry point for Scope 1–3 accounting with audit-ready workflows and integrations.
- API access
8.9/10★★★★☆Visit Persefoni -
Best forComplex value-chain and product footprints
- Better than CO2 AI:
- Editor score 8.8 vs 7.8
A broad carbon accounting platform for detailed corporate, product, and supplier footprints.
- API access
8.8/10★★★★☆Visit Sweep -
Best forTeams combining accounting with abatement planning
- Better than CO2 AI:
- Editor score 8.7 vs 7.8
A full-scope carbon platform that connects inventories, suppliers and reduction planning.
- API access
8.7/10★★★★☆Visit SINAI -
Best forGrowing organizations wanting transparent pricing
- Better than CO2 AI:
- Editor score 8.6 vs 7.8
A broad carbon accounting platform with transparent entry pricing and supplier tools.
- API access
8.6/10★★★★☆Try CarbonAnalytics -
Best forFinance-led teams wanting automated accounting
- Better than CO2 AI:
- Editor score 8.4 vs 7.8
A finance-friendly platform for automated emissions accounting, supplier engagement, and reporting.
- API access
8.4/10★★★★☆Visit NetNada -
Best forTextile companies needing detailed value-chain analysis
- Better than CO2 AI:
- Editor score 8.2 vs 7.8
A textile-focused platform for Scope 1–3 accounting, product analysis and supplier data.
- API access
8.2/10★★★★☆Visit GreenStitch -
Best forFashion brands needing product and supplier depth
- Better than CO2 AI:
- Editor score 8.1 vs 7.8
A fashion-focused platform combining Scope 1–3 accounting, product LCA, and supplier data.
- API access
8.1/10★★★★☆Visit Carbonfact -
Best forRetailers needing deep supply-chain traceability
- Better than CO2 AI:
- Editor score 8.0 vs 7.8
A retail-focused platform for Scope 1–3 accounting, supplier data, and product footprints.
- API access
8.0/10★★★★☆Visit Vaayu -
Best forIndustrial teams needing verification workflows
- Better than CO2 AI:
- Editor score 7.9 vs 7.8
A broad carbon accounting platform for industrial teams with verification needs.
- API access
7.9/10★★★★☆Visit CarbonSmart -
Best forSmall organizations starting with free accounting
- Better than CO2 AI:
- Free plan
A practical starting point for Scope 1–3 accounting, with manual data collection.
7.7/10★★★★☆Visit Hedgehog
CO2 AI Alternatives: Common Questions
What is the best alternative to CO2 AI?
IBM Envizi: #1 in our Carbon Accounting Software ranking, with an editor score of 9.4 out of 10. A broad Scope 1–3 platform for organizations with complex sustainability data needs.
Is there a free alternative to CO2 AI?
Yes. Persefoni and Hedgehog Carbon Platform have a free plan or a free tier.
Why do people look for CO2 AI alternatives?
Pricing is handled through contact sales; No free plan is offered; Its enterprise breadth may exceed narrower accounting needs.
How do I switch from CO2 AI?
Export your data from CO2 AI (most tools have an export in their settings). Sign up for the alternative; start on its free plan or trial if it has one. Import your export and set up the integrations your team relies on. Run both side by side for a short while, then cancel CO2 AI.
How to Switch from CO2 AI
- Export your data from CO2 AI (most tools have an export in their settings).
- Sign up for the alternative; start on its free plan or trial if it has one.
- Import your export and set up the integrations your team relies on.
- Run both side by side for a short while, then cancel CO2 AI.
CO2 AI vs Each Alternative
| # | Tool | Free plan | Paid from | Scope coverage | Data collection | Emissions factors | Supplier engagement | Audit trail | Score |
|---|---|---|---|---|---|---|---|---|---|
| 15 | CO2 AI | No | Scope 1-3+ | Both | Both | Yes | Yes | 7.8 | |
| 1 | IBM Envizi | Scope 1-3 | Both | Both | Yes | Yes | 9.4 | ||
| 2 | ACT Group Decarbonization Platform | Scope 1-3 | Both | Built-in | Yes | Yes | 9.3 | ||
| 3 | CarbonTool | No | €2,000/yr | Scope 1-3 | Both | Both | Yes | Yes | 9.2 |
| 4 | Normative | Scope 1-3 | Both | Built-in | Yes | Yes | 9.1 | ||
| 5 | Watershed | Scope 1-3 | Both | Both | Yes | Yes | 9.0 | ||
| 6 | Persefoni | Yes | Scope 1-3 | Both | Both | Yes | Yes | 8.9 | |
| 7 | Sweep | Scope 1-3 | Both | Both | Yes | Yes | 8.8 | ||
| 8 | SINAI Technologies | Scope 1-3 | Both | Both | Yes | Yes | 8.7 | ||
| 9 | CarbonAnalytics | No | £671.99/unit/yr | Scope 1-3 | Both | Both | Yes | Yes | 8.6 |
| 10 | NetNada | No | Scope 1-3 | Both | Both | Yes | Yes | 8.4 | |
| 11 | GreenStitch | No | $3,000/yr | Scope 1-3 | Both | Both | Yes | Yes | 8.2 |
| 12 | Carbonfact | No | Scope 1-3 | Both | Both | Yes | Yes | 8.1 | |
| 13 | Vaayu | Scope 1-3 | Both | Built-in | Yes | 8.0 | |||
| 14 | CarbonSmart | Scope 1-3 | Both | Both | Yes | Yes | 7.9 | ||
| 15 | Hedgehog Carbon Platform | Yes | €100/mo | Scope 1-3 | Manual | Both | Yes | 7.7 |
Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026
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