Best ESG Reporting Software in 2026
Short answer: Persefoni is the only platform here priced at $0, a free Pro plan that already builds CSRD, ISSB and CDP reports. Workiva suits a regulated filer combining SEC and CSRD disclosure in one controlled workflow. Watershed and IBM Envizi fit large enterprises automating data collection at scale. Novisto, Position Green and Sphera specialize in finance-grade data and the European CSRD workflow, and Sweep, Plan A and Greenly are the mid-market and SMB entry points. Every pick besides Persefoni is quote-only.
Ten platforms compared on CSRD and ISSB disclosure depth, data management and price, checked on vendor pages in September 2026.
ESG reporting software builds the disclosure a regulator, an auditor or an investor actually reads: emissions data mapped to a framework like CSRD's ESRS, ISSB's IFRS S1 and S2, or CDP, with an audit trail behind every number. That is a different job from a pure carbon calculator. Our carbon accounting software guide covers tools built to measure Scope 1, 2 and 3 emissions; this guide covers the platforms that turn that data, plus social and governance data, into a filed disclosure.
The regulatory ground shifted in 2026. The EU's Omnibus I directive, Directive (EU) 2026/470, entered into force on March 18, 2026 and narrows mandatory CSRD reporting to companies with more than 1,000 employees and over €450 million in net turnover, applying to financial years starting January 1, 2027, with first reports due in 2028. The IFRS Foundation's targeted amendments to IFRS S2 take effect for reporting periods beginning on or after January 1, 2027, easing Scope 3 financed-emissions measurement. Both changes push the next wave of mandatory disclosures out a year without removing the job for companies still in scope, or the ones reporting voluntarily.
Toolradar data: the catalog tracks 15 ESG reporting tools, and 93% of them sell on a paid-only basis with no free tier; 7% give buyers a free or freemium way in. That skew matches these ten vendor pricing pages: nine publish no dollar figure at all, and only Persefoni's Pro plan is free with no time limit. IBM Envizi prices by data volume through a calculator instead of a published rate.
Start with Workiva when the filing itself, SEC, CSRD or both, is the job and you want one platform to own controls and audit trail. Persefoni fits a team building a CSRD, ISSB or CDP-ready report before committing budget. Watershed and IBM Envizi fit large enterprises consolidating data from dozens of systems, while Novisto, Position Green and Sphera fit a European or finance-grade data workflow. Sweep, Plan A and Greenly, an alternative worth comparing, are the mid-market and SMB entry points.
How we ranked: these ten were chosen from the 15 ESG reporting tools in the catalog because each names a specific disclosure framework, CSRD, ISSB or CDP, on its own site, not only general sustainability tracking, and every claim here was pulled from a vendor's own pages this month. No paid placement.
Top Picks
Picked by editorial review, informed by G2 and Capterra review volume and rating and by media mentions, the signals behind our category rankings. How we rate
| Tool | Starting price | Rating | Best for |
|---|---|---|---|
| Workiva | No list price | 4.52,148 reviews | Regulated filers that want one platform to own SEC and CSRD filings, controls and audit trail |
| Persefoni | $0 (Pro) | 4.820 reviews | Teams that want a CSRD, ISSB or CDP-ready report before committing budget |
| Watershed | No list price | n/a | Large enterprises consolidating scattered emissions data into one reporting workflow |
| IBM Envizi | No published rate | n/a | Large enterprises that want a data-volume pricing model instead of a flat quote |
| Novisto | No list price | n/a | Sustainability teams that need an audit trail behind every disclosed number |
| Position Green | No list price | 4.39 reviews | European mid-to-large companies running a CSRD or ESRS-mandated reporting program |
| Sphera | No list price | 4.011 reviews | Enterprises that want ESG reporting alongside EHS and supply chain risk in one vendor |
| Sweep | No list price | 4.938 reviews | Mid-market companies reporting to more than one framework from the same data |
| Plan A | No list price | n/a | German, Austrian and Swiss mid-market companies needing GHG Protocol and CSRD-aligned reporting |
| Greenly | No list price | 4.839 reviews | SMBs building their first GHG compliance report before scaling to a full ESG program |
Regulated filers that want one platform to own SEC and CSRD filings, controls and audit trail
Workiva's 'Enterprise' tier, with its custom pricing, is likely expensive given its comprehensive feature set for reporting and compliance.
Teams that want a CSRD, ISSB or CDP-ready report before committing budget
Persefoni's pricing structure is opaque, with only a 'Start for free' PRO tier and 'Request a demo' for the ADVANCED tier.
Watch out
Many key features are 'Add-on' in PRO tier
Large enterprises consolidating scattered emissions data into one reporting workflow
Large enterprises that want a data-volume pricing model instead of a flat quote
Sustainability teams that need an audit trail behind every disclosed number
European mid-to-large companies running a CSRD or ESRS-mandated reporting program
Enterprises that want ESG reporting alongside EHS and supply chain risk in one vendor
Mid-market companies reporting to more than one framework from the same data
The 'Pro' tier requires contacting sales, which often indicates a higher price point and custom solutions.
Watch out
Potential seat minimums for Pro
German, Austrian and Swiss mid-market companies needing GHG Protocol and CSRD-aligned reporting
SMBs building their first GHG compliance report before scaling to a full ESG program
Other ESG Reporting tools worth considering
More published tools from our ESG Reporting category, ordered by our category ranking. They are not part of the editorial picks above.
What ESG reporting software is
ESG reporting software collects environmental, social and governance data, maps it to a specific framework, CSRD's ESRS, ISSB's IFRS S1 and S2, CDP or SASB, and produces a report an auditor and a regulator can check line by line. That is broader than a carbon calculator: alongside Scope 1, 2 and 3 emissions, a reporting platform tracks materiality assessments, supplier and workforce data, and the controls an assurance provider signs off on.
The data management job matters most in practice. Novisto calls its approach "finance-grade" ESG data, with approval workflows and audit trails, since CSRD reporting now carries limited assurance similar to financial statements. Sweep and Position Green both map one data source to CSRD, ISSB, GRI and CDP at once, so a company reporting to two regulators is not rebuilding the same numbers twice. The filing job, drafting the document with narrative disclosures and XBRL tagging, is what Workiva built its business on for SEC filings before extending it to sustainability.
Why the framework you report to decides the tool
A company forced into CSRD by its EU revenue and headcount needs software that speaks ESRS, double materiality and limited assurance. A US company reporting voluntarily to CDP or building a first climate disclosure for investors needs something closer to Persefoni's Sustainability Report Builder, which targets CSRD, ISSB and CDP from the same emissions data. Buying the wrong tool means re-mapping the same numbers to a second framework a year later.
Omnibus I cut the number of companies mandatorily in CSRD's scope by roughly 80%, per EU estimates cited in coverage of the directive, but it did not remove the obligation for the companies that remain, and many mid-sized companies outside mandatory scope still report voluntarily because a customer, lender or investor asks for it. A platform's own framework coverage, not its marketing copy about "sustainability," is the fact to verify before a demo.
Key Features to Look For
Multi-framework mapping from one data source (Essential)
Sweep and Novisto both map a single data set to CSRD, ISSB, GRI, CDP and TCFD at once, so a company reporting to more than one regulator is not rebuilding the same data twice.
Audit trail and assurance readiness (Essential)
Novisto builds approval workflows and audit trails into every data point, matching the limited assurance CSRD now requires on sustainability statements. A tool with no approval workflow leaves that evidence trail to a spreadsheet.
Scope 1, 2 and 3 emissions calculation (Essential)
Persefoni covers all 15 categories of Scope 3 on its free Pro plan; IBM Envizi and Watershed both calculate the same three scopes inside a wider ESG data platform.
Materiality assessment (Essential)
Position Green runs a double materiality assessment, the CSRD-specific step deciding which topics a company must disclose, alongside data consolidation and benchmarking.
AI-assisted drafting (Important)
Watershed's AI drafts report narrative with inline recommendations, and Persefoni's Copilot does the same for a CSRD or ISSB report. Both vendors describe the AI as a draft assistant, not a sign-off replacement.
Volume-based or per-account pricing (Nice to have)
IBM Envizi prices by the number of data "accounts" tracking activity, supplier data and KPIs, from under 1,000 accounts on Essentials to 15,000-plus on Premium, rather than a flat seat price.
What to settle before the first demo
Confirm whether your obligation is CSRD, ISSB, CDP or a mix, and ask each vendor to show that exact framework's output, not a general "sustainability dashboard."
Check the Omnibus I threshold, 1,000 employees and €450 million net turnover, against your own headcount and EU revenue before assuming mandatory CSRD scope for 2027.
Ask how the platform handles Scope 3, the category every vendor here spends the most words on and first-time buyers underestimate.
Get the quote itemized by module. Every platform except Persefoni and IBM Envizi is fully quote-only, so the sales call is where data collection, framework mapping and assurance support turn out to be one price or three.
Evaluation Checklist
On Workiva, ask to see a completed CSRD or SEC climate filing end to end, not only the drafting interface, since the value is the controls and audit trail around the document.
On Persefoni, confirm the free Pro plan's single-user limit works for your team before assuming you will stay on it past a pilot.
On IBM Envizi, run your real account count, not a demo estimate, through the pricing calculator before comparing it to a flat quote elsewhere.
On Novisto, ask to see the approval workflow and audit trail for one metric end to end, not only the dashboard.
On Position Green, confirm the double materiality assessment output maps directly to your CSRD topics, not a generic ESG scorecard.
Pricing Overview
Free
Persefoni Pro: single user, all Scope 1-3 categories, CSRD, ISSB and CDP report builder, no credit card and no time limit.
$0
Volume-based calculator
IBM Envizi's three account-based bundles, Essentials, Standard and Premium, estimated through a pricing calculator with a 12-month minimum term.
No published rate
Pricing Comparison
| Tool | Free tier | Entry price | Past the entry tier | Best fit |
|---|---|---|---|---|
Workiva | None published | No list price | No list price | Regulated filers combining SEC and CSRD disclosure in one platform |
Persefoni | Yes, Pro plan, no time limit | $0 (Pro) | No list price (Advanced) | Free CSRD, ISSB and CDP report builder for a first-time buyer |
Watershed | None published | No list price | No list price | Large enterprises consolidating emissions data at scale |
None published | No published rate (calculator, Essentials tier) | No published rate (Standard, Premium) | Large enterprises wanting a data-volume pricing model | |
Novisto | None published | No list price | No list price | Finance-grade ESG data with audit trails |
None published | No list price | No list price | European CSRD and ESRS specialist for mid-to-large orgs | |
Sphera | None published | No list price | No list price | ESG reporting bundled with EHS and supply chain risk |
Sweep | None published | No list price | No list price | Mid-market carbon and ESG reporting from one data source |
None published | No list price | No list price | DACH-region mid-market carbon and ESG reporting | |
Greenly | None published | No list price | No list price | SMBs starting with a GHG Report Compliance tier |
Prices checked on vendor pricing and product pages, September 25, 2026, including Persefoni pricing and IBM Envizi pricing. Workiva, Watershed, Novisto, Position Green, Sphera, Sweep, Plan A and Greenly publish no list price.
Mistakes to Avoid
- ×
Buying a carbon calculator when the requirement is a full ESG disclosure. CSRD and ISSB ask for materiality assessments, social and governance data and an audit trail, not only Scope 1-3 emissions math. Our carbon accounting software guide covers the emissions-only tools separately.
- ×
Assuming the Omnibus I scope change removes the reporting job. The narrowed 1,000-employee, €450 million threshold cuts who must report under CSRD from 2027 onward; it does not remove voluntary disclosure pressure many mid-sized companies still face.
- ×
Treating Persefoni's free Pro plan as a permanent solution for a growing team. Pro caps at a single user account; a sustainability team of two or more needs the quote-only Advanced plan.
- ×
Comparing IBM Envizi's calculator estimate against a flat enterprise quote on a spreadsheet. IBM states its estimate is not guaranteed, so treat it as a starting number to confirm with sales, not a locked price.
Expert Tips
- →
Ask every vendor which specific ESRS topics or IFRS S2 disclosures it cannot yet map, not only the ones it highlights first. A vendor that names its gaps directly is more trustworthy than one that will not.
- →
Start with Persefoni's free Pro plan if you are still scoping the requirement. Building one real CSRD or CDP report on a free tier tells you more about your own data gaps than any demo will.
- →
- →
Reuse your emissions data across frameworks instead of re-collecting it. Sweep, Novisto and Persefoni all map one data source to multiple frameworks; ask any vendor how many times you would re-enter the same number.
Red Flags to Watch For
- !
A vendor that talks about "sustainability" broadly but cannot name CSRD, ISSB or CDP specifically when asked which frameworks its reports map to.
- !
A sales team that cannot say whether limited assurance or an audit trail is built into the platform.
- !
A quote with no line item for Scope 3 or supplier data, the category every vendor here calls hardest to collect.
- !
A pricing calculator estimate, like IBM Envizi's, presented as a guaranteed number rather than one to confirm with sales.
The Bottom Line
Workiva when the filing itself, SEC, CSRD or both, is the deliverable and you want one platform to own the controls and audit trail. Persefoni is the pick to start with: its Pro plan is genuinely free with no time limit and builds a real CSRD, ISSB or CDP report from Scope 1-3 data.
Watershed and IBM Envizi fit large enterprises consolidating data from dozens of systems; Envizi is the one platform here with a published pricing structure, even if the dollar figure needs its calculator and a sales call. Novisto, Position Green and Sphera fit teams that need finance-grade data management, a European CSRD workflow, or ESG reporting bundled with EHS and supply chain risk. Sweep, Plan A and Greenly are the mid-market and SMB entry points.
Cite this: Toolradar, "Best ESG Reporting Software in 2026", September 2026. Prices checked on vendor pricing pages in September 2026. No paid placement. Ranked against the 15 ESG reporting tools the catalog tracks.
Frequently Asked Questions
What is the best ESG reporting software in 2026?
Workiva and Persefoni, depending on what you need first. Workiva fits a regulated filer combining SEC and CSRD disclosure in one platform with a full audit trail, though it publishes no list price. Persefoni is the only platform in this guide with a genuinely free, unlimited-time plan, building CSRD, ISSB and CDP-ready reports from Scope 1-3 data. Watershed and IBM Envizi fit large enterprises consolidating data at scale, and Novisto, Position Green and Sphera specialize in finance-grade data management and the European CSRD workflow.
How much does ESG reporting software cost in 2026?
As of September 25, 2026, nine of the ten platforms in this guide publish no list price: Workiva, Watershed, Novisto, Position Green, Sphera, Sweep, Plan A and Greenly route every visitor to a sales conversation. Persefoni's Pro plan is free with no time limit; its Advanced plan is quote-only. IBM Envizi prices by data volume through a calculator across three account-based tiers, but states its estimate is not a guaranteed, formal offer.
Is there a free ESG reporting tool?
Persefoni's Pro plan is the only genuinely free option among these ten, with no credit card, no time limit and no hidden fees. It covers all 15 Scope 3 categories and a Sustainability Report Builder for CSRD, ISSB and CDP, but caps at a single user account. Every other platform here is quote-only or, for IBM Envizi, calculator-based with no published free tier.
What is ESG reporting software and how is it different from carbon accounting software?
ESG reporting software collects environmental, social and governance data and maps it to a disclosure framework, CSRD's ESRS, ISSB's IFRS S1 and S2, or CDP, producing a report an auditor and regulator can check. Carbon accounting software, covered in our separate carbon accounting guide, focuses specifically on measuring Scope 1, 2 and 3 emissions. Several platforms here do both, but reporting adds materiality assessments and an audit trail on top of the emissions math.
Who has to comply with CSRD after the Omnibus I changes?
Following Directive (EU) 2026/470, in force since March 18, 2026, mandatory CSRD reporting now applies to EU companies and non-EU issuers with more than 1,000 employees and over €450 million in net turnover, plus qualifying non-EU parents. The amended scope applies to financial years starting January 1, 2027, with first reports due in 2028. Companies below that threshold are out of mandatory scope but many still report voluntarily.
When do the ISSB's IFRS S2 changes take effect?
The IFRS Foundation's targeted amendments to IFRS S2, which ease Scope 3 financed-emissions measurement and add jurisdictional reliefs, apply to reporting periods beginning on or after January 1, 2027, with early application permitted. They do not change IFRS S2's core climate disclosure requirements, only specific implementation details.
How does IBM Envizi's pricing model work?
IBM Envizi prices by the number of data "accounts" tracking activity data, supplier data and KPIs, across three tiers: Essentials for up to 1,000 accounts, Standard for 1,001 to 5,000, and Premium for 5,001 to 15,000-plus. There is no published dollar figure; IBM offers a pricing calculator for an estimate, states a 12-month minimum term, and notes the estimate is not a guaranteed or formal offer.
Cite this page: Toolradar, "Best ESG Reporting Software in 2026", updated September 2026, https://toolradar.com/guides/best-esg-reporting-software
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