FREEDOM251

Freedom251 › Analytics & Data

Free and open first

Best Environmental, Social and Governance Reporting Software in 2026

ESG reporting tools bring together sustainability information for emissions accounting, Scope 3 measurement, materiality reviews, supplier records, assurance processes and report exports. These products are offered across combinations of web, API, iOS, Android and Windows platforms.

  1. 1

    Persefoni

    Free plan APIWeb

    Persefoni combines emissions accounting coverage with guided disclosure tools and anomaly detection.

    6.9 Free plan Visit site
  2. 2

    Brightest

    Free plan Web
    6.1 Free plan · paid from $5,900/yr Visit site
  3. 3

    Arbor

    Paid APIWeb

    Choose Arbor if your company needs product carbon footprints alongside emissions measurement for assets or organizational activity.

    5.8 Visit site
  4. 4

    EcoOnline

    Paid AndroidiPhoneWeb

    Choose EcoOnline if your multi-site, high-risk operation needs safety workflows and reporting across locations.

    5.8 Pricing on request Visit site
  5. 5

    OpenEco

    Free plan Web
    5.7 Free plan Visit site
  6. 6

    Plan A

    Paid APIWeb

    Plan A combines emissions measurement and reporting with target-setting and reduction planning for businesses. Buyers should note that pricing is on request and CSRD reporting is an add-on.

    5.2 Pricing on request Visit site
  7. 7

    Certainty ESG

    Paid AndroidiPhoneWeb+1
    5.0 From $18/user/mo (annual) Visit site
  8. 8

    Watershed

    Paid APIWeb

    Watershed combines emissions measurement, ESG reporting, and decarbonization planning in one platform.

    5.0 Pricing on request Visit site
  9. 9

    Supplier.io

    Paid Web

    Supplier.io combines supplier discovery and data enrichment with spend, carbon, and impact reporting. Organisations should ask about pricing and specific integrations before choosing a plan.

    4.9 Pricing on request Visit site
  10. 10

    Sweep

    Paid Web

    Sweep brings emissions data collection, reporting, and AI-assisted workflows into one sustainability platform.

    4.9 Pricing on request Visit site
  11. 11

    Assent Sustainability Platform

    Paid Web
    4.7 Pricing on request Visit site
  12. 12

    EcoVadis Sustainability Intelligence Platform

    Paid Web
    4.6 Pricing on request Visit site
  13. 13

    Greenly

    by Greenly
    Paid Web
    4.6 Pricing on request Visit site
  14. 14

    IBM Envizi

    Paid Web
    4.6 Pricing on request Visit site
  15. 15

    KEY ESG

    Paid Web
    4.4 Pricing on request Visit site
  16. 16

    KindLink CSRD Reporting

    Paid Web
    4.4 Pricing on request Visit site
  17. 17

    ESG:ONE

    Paid Web
    4.3 From £3,000/yr Visit site
  18. 18

    Novisto

    Paid Web
    4.3 Pricing on request Visit site
  19. 19

    Oren Sustainability Hub

    Paid Web
    4.1 Pricing on request Visit site
  20. 20

    SINAI Report

    Paid Web
    4.1 Pricing on request Visit site
  21. 21

    ServiceNow ESG Management

    Paid Web
    3.9 Pricing on request Visit site
  22. 22

    Sphera Corporate Sustainability Software

    Paid Web
    3.9 Pricing on request Visit site

#1Places #1, #2, #3, #4, #5 on this list can be bought by the makers of the software on it. See the price

Compare free access, paid pricing, platform support and the reporting capabilities you need. Check whether a free plan or trial is available, what paid use costs, and whether the licence lets you read or change the code when that matters.

Questions

Is ESG reporting software available with a free plan?

Brightest shows a free plan. Check the current pricing page for any product you are considering, because other products may require a paid plan or a quote.

What does ESG software compare for emissions?

Greenhouse-gas accounting and Scope 3 tracking are among the emissions criteria. Arbor's carbon accounting platform measures emissions from companies and products.

Which platforms can ESG reporting tools run on?

The listed products cover web, API, iOS, Android and Windows platforms. Support varies by product; Arbor lists API and web access, while EcoOnline lists Android, iOS and web.

Do products show pricing publicly?

Brightest shows paid options starting at $5,900 per year, Certainty ESG at $18 per user per month with annual billing, and ESG:ONE at £3,000 per year. Several products list pricing on request.

Can I check supplier and assurance features?

Yes. Supplier data portals and assurance workflows are comparison points for this category, along with framework coverage, materiality assessment and reporting exports.

More in Analytics & Data