Visibility in this ranking can be paid for. Payment moves a vendor's position within the
shortlist; it never adds a vendor, and it never changes a word of the review. The largest vendors in esg and sustainability reporting software
cannot hold places 1 to 3. Places 1 to 3 go to challengers, vendors outside the best-known brands in a category,
wherever the category has them; the established names follow from place 4 in their ranked order. How it works: placement disclosure ·
editorial process.
The 11 tools, reviewed
#1 Persefoni
US climate management and accounting SaaS with an advisory board including the founders of CDP, SASB and TCFD · United States · persefoni.com
Advisory board includes CDP, SASB, TCFD founders Serves companies and financial institutions Founded 2020
Persefoni's advisory board includes the founders of CDP, SASB and TCFD, three of the reference frameworks the rest of this category builds its own reporting around, which gives the Arizona company an unusually direct line to how those standards are actually meant to work.
- Pricing: Free plan + quote. Persefoni Pro is free with no time limit but limited to a single user, with GHG Metrics Reports sold as add-ons; Persefoni Advanced is quote only. Free plan: free plan.
- Best for: Financial institutions and companies wanting a platform built around formal climate-disclosure frameworks
- Strengths: Carbon footprint measurement; Climate disclosure/reporting; Decarbonization management.
Where it falls short
The free Pro plan is limited to a single user and leaves framework-ready GHG Metrics Reports as paid add-ons, so any team needing collaboration, role-based permissions or exportable disclosure data ends up on the quote-only Advanced plan with no published price.
Wrong for
A sustainability team that needs several users, role-based permissions and exportable disclosure data from day one, which only the quote-only Advanced plan provides.
Visit Persefoni →
#2 Normative
Stockholm carbon accounting pioneer bundling a named climate advisor into every account · Sweden · normative.io
Founded 2014 — one of the oldest in this category 349,000 verified emission factors Named Climate Strategy Advisor per account
Founded in Stockholm in 2014 by Kristian Rönn, Adam Wamai Egesa and Robin Undall-Behrend, Normative predates the CSRD-driven wave of newer entrants elsewhere on this list by the better part of a decade, and it still includes a named, GHG Protocol-certified Climate Strategy Advisor with every account rather than leaving a customer to a support queue.
- Pricing: Quote only. Quote only; two named plans (Essential and Premium) with no prices published, and consultancy services such as CSRD reporting or SBTi target-setting priced as separate add-ons. Free plan: none.
- Best for: Teams wanting a named, GHG Protocol-certified climate expert working alongside the software
- Strengths: Carbon accounting (Scope 1-3); Product carbon footprint tools; Supply chain engagement.
Where it falls short
No published pricing, and the advisor-bundled model is less purely self-serve than some competitors.
Wrong for
Buyers who specifically want a pure self-serve SaaS tool with no advisory relationship attached.
Visit Normative →
#3 Plan A
Berlin decarbonisation-first carbon accounting platform, GHG Protocol compliant and TÜV Rheinland certified · Germany · plana.earth
TÜV Rheinland certified methodology B Corp and SOC 2 compliant AI-assisted decarbonisation modelling
Plan A's carbon-accounting methodology carries TÜV Rheinland certification, an independent technical audit that only Normative, verified by TÜV SÜD, also claims on this list, on top of B Corp status.
- Pricing: Quote only, named tiers. Quote only; three named plans (Essential, Pro and Enterprise) with no prices published. Free plan: none.
- Best for: Organisations prioritising decarbonisation modelling over reporting alone
- Strengths: Carbon accounting (Scope 1-3); Sustainability-disclosure reporting; AI-assisted decarbonisation modelling.
Where it falls short
No published pricing, no free tier.
Wrong for
A buyer who only wants pure reporting/disclosure with no reduction-planning features.
Visit Plan A →
#4 Greenly
Paris carbon accounting platform for SMBs with three clearly named pricing tiers · France · greenly.earth
Built for SMB and mid-market Life cycle analysis (LCA) included Covers TCFD, SBTi, CBAM, EUDR
Greenly is one of the few vendors in this ranking that names its pricing tiers rather than routing every buyer straight to a single 'book a demo' button: GHG Report Compliance, Climate Action Ready and Net Zero Contributor are feature-differentiated, even though none carries a published number.
- Pricing: Quote only, named tiers. Quoted on request; three named tiers (GHG Report Compliance, Climate Action Ready, Net Zero Contributor) with no numeric prices published. Free plan: none.
- Best for: SMBs and mid-market companies wanting a clearly staged entry point
- Strengths: Scope 1-3 carbon accounting; Life cycle analysis (LCA); TCFD/SBTi framework support.
Where it falls short
Still no numeric pricing, and add-ons are priced separately.
Wrong for
Large enterprises needing deep multi-entity consolidation beyond the SMB/mid-market design point.
Visit Greenly →
#5 Position Green
Swedish ESG software and advisory serving 1,000+ customers across 30+ countries · Sweden · positiongreen.com
CSRD, ESRS, EU Taxonomy and CSDDD in one platform 10 offices across Northern Europe Software bundled with advisory services
Position Green serves more than 1,000 customers from 10 offices across Northern Europe and sells software bundled with sustainability advisory rather than as a pure self-serve product. Norvestor, a Nordic private equity firm, has held a majority stake in the Malmö company since 2022, with Euroclear, Nysnø and Arendals Fossekompani joining as investors in 2025.
- Pricing: Quote only. Quoted on request; not published. Free plan: none.
- Best for: Larger organisations wanting software bundled with advisory across many EU markets
- Strengths: CSRD/ESRS reporting; EU Taxonomy and CSDDD compliance; Scope 1-3 carbon accounting.
Where it falls short
No published pricing; the advisory-bundled model may cost more and move slower than a pure self-serve tool.
Wrong for
A small team that wants to self-configure a lightweight tool without a consulting relationship attached.
Visit Position Green →
#6 Workiva
US public company offering ESG reporting as one module inside a broader connected-reporting platform · United States · workiva.com
Public company since 2014 IPO (NYSE: WK) ESG module alongside SEC/statutory reporting and SOX 6,700+ customers, 85%+ of Fortune 1000 per vendor
Workiva has been a public company since its 2014 IPO on the NYSE under ticker WK, having started in 2008 as WebFilings before rebranding, and it sells ESG and sustainability reporting as one module inside a much broader connected-reporting platform that also covers SEC and statutory reporting, SOX internal controls and internal audit.
- Pricing: Quote only. Quoted on request; not published. Free plan: none.
- Best for: Companies wanting SEC/statutory reporting, SOX controls and ESG reporting in one connected data environment
- Strengths: ESG & sustainability reporting module; SEC and statutory reporting; Internal controls / SOX compliance.
Where it falls short
Buying the ESG capability generally means engaging with the wider Workiva platform.
Wrong for
A small company that wants a lightweight, ESG-only tool without adopting a broader financial-reporting platform.
Visit Workiva →
#7 Sami
Paris decarbonisation and ESG platform with 2,000+ clients, majority-owned by Swiss testing group SGS since Nov 2025 · France · sami.eco
GHG Protocol, ISO 27001 and B Corp certified 2,000+ clients across Europe 300,000+ emission factors
Sami combines software with consulting and training across Carbon Hub, its Scope 1-3 measurement and net-zero strategy product, and ESG Hub, its sustainability reporting product, and states it serves more than 2,000 clients across Europe from a GHG Protocol, ISO 27001 and B Corp-certified platform, though Greenly, now merging with Normative, reports a larger combined base of 4,000.
- Pricing: Quote only. Quoted on request; vendor describes positioning as enterprise-grade capabilities at SME-mid-cap pricing, no numbers published. Free plan: none.
- Best for: French and European companies wanting software, consulting and training from one provider
- Strengths: Carbon Hub (Scope 1-3 measurement, net-zero strategy); ESG Hub (sustainability reporting); Consulting and training services.
Where it falls short
Majority ownership moved to SGS SA, a Swiss testing and certification group, in November 2025, so roadmap and contract terms now answer to a new controlling shareholder, and there is no published numeric pricing for either the Carbon Hub or the ESG Hub.
Wrong for
A buyer with a strict policy requiring the controlling shareholder, not just the operating company, to be EU-based.
Visit Sami →
#8 Watershed
Sustainability AI platform reporting 4.4 gigatons of CO2e under management · United States · watershed.com
2.3 million emission factors Carbon removal marketplace ~400 employees
Watershed reports 4.4 gigatons of CO2e under management across its customer base, the largest emissions-under-management figure any vendor here publishes, and it was named a Leader in the 2026 Forrester Wave for sustainability management software and in Verdantix's 2026 Green Quadrant.
- Pricing: Quote only. Not published by the vendor; third-party estimates for enterprise deployments commonly cite a $50,000-$250,000+ annual range, unconfirmed by Watershed itself. Free plan: none.
- Best for: Large enterprises wanting the most analyst-recognized US carbon platform
- Strengths: Emissions measurement (Scope 1-3); Sustainability reporting; Supply chain engagement tools.
Where it falls short
No published pricing anywhere, and third-party estimates suggest it's among the most expensive tools in this category.
Wrong for
Small or mid-sized companies without enterprise budget, and any EU buyer whose procurement policy requires an EU-headquartered vendor.
Visit Watershed →
#9 Coolset
Dutch CSRD and EU Taxonomy platform bundling nine compliance modules in one product · Netherlands · coolset.com
9 named compliance modules Unlimited users on base platform Youngest vendor in this category (2022)
Coolset is the youngest company in this ranking, founded in 2022, and it has used that clean slate to name nine separate compliance modules rather than selling one generic 'ESG reporting' product: CSRD reporting, EU Taxonomy alignment, GHG Scope 1-3 accounting, EUDR and a lighter EUDR-for-SME track, EUTR, VSME, PPWR and EcoVadis assessment preparation.
- Pricing: Quote only, per module. Quoted per module; no numeric pricing published by the vendor. Free plan: none.
- Best for: EU mid-market companies needing CSRD, EU Taxonomy, EUDR and CBAM-adjacent compliance in one place
- Strengths: CSRD reporting module; EU Taxonomy alignment module; GHG Scope 1-3 accounting.
Where it falls short
No numeric pricing for any of its nine modules, so a buyer stacking CSRD, EUDR and PPWR has to get each one quoted, and it has the shortest track record of any vendor in this category, despite ISO 27001 certification and a SOC report.
Wrong for
Companies wanting deep Scope 1-3 carbon-accounting specialization over broad compliance-framework coverage.
Visit Coolset →
#10 Sweep
Paris-founded carbon and ESG platform named a Leader in the 2026 IDC MarketScape and Verdantix Green Quadrant · France · sweep.net
B Corp certified Registered Entreprise à Mission (France) 2026 IDC MarketScape and Verdantix Leader
Sweep was named a Leader in both the 2026 IDC MarketScape for Carbon Management and the 2026 Verdantix Green Quadrant for enterprise carbon management, two of the sustainability-software category's more closely watched independent scorecards; Watershed is the only other vendor here claiming a 2026 Verdantix Leader position.
- Pricing: Quote only. Not published; quoted after a demo. Free plan: none.
- Best for: Companies wanting independent analyst validation before shortlisting a vendor
- Strengths: Scope 1-3 emissions measurement; ESG data management across value chain; Reporting.
Where it falls short
No published pricing, no free tier.
Wrong for
Buyers wanting a numeric price before a sales call.
Visit Sweep →
#11 Greenomy (Position Green)
Brussels EU Taxonomy specialist acquired by Position Green in 2025, its website now redirecting to Position Green · Belgium · greenomy.io
Acquired by Position Green, September 2025 Narrow focus: EU Taxonomy and CSRD alignment data Distribution alliances with PwC Belgium, Deloitte, Accenture
Greenomy was built in Brussels for EU Taxonomy alignment, CSRD and VSME reporting data for corporates, credit institutions and asset managers, narrower ground than the broader carbon-accounting-plus-reporting suites ranked above it. Founded in 2020 and majority-owned by Euroclear from 2022, it was acquired in September 2025 by Position Green, the Swedish vendor ranked fifth in this list, with Euroclear staying on as a Position Green shareholder.
- Pricing: Quote only. Quote only through Position Green; greenomy.io now redirects to Position Green's site, which offers demos but no free trial or published price. Free plan: none.
- Best for: Financial institutions and corporates needing EU Taxonomy alignment data specifically
- Strengths: EU Taxonomy alignment reporting; CSRD compliance support; AI-powered reporting and data automation.
Where it falls short
No longer sold as a standalone product with its own site, since greenomy.io redirects to Position Green, so its roadmap, pricing and contract terms now sit with Position Green; and it never offered dedicated Scope 1-3 carbon accounting depth of its own.
Wrong for
A buyer needing deep Scope 1-3 carbon accounting as the primary requirement rather than Taxonomy alignment data.
Visit Greenomy (Position Green) →
Questions and answers
What is the best ESG reporting software in 2026?
Persefoni ranks first of 11, best for financial institutions and companies wanting a platform built around formal climate-disclosure frameworks. Normative is second (teams wanting a named, GHG Protocol-certified climate expert working alongside the software) and Plan A third (organisations prioritising decarbonisation modelling over reporting alone). Places 1 to 3 go to challengers, vendors outside the best-known brands, wherever the category has them.
Are most ESG reporting vendors European or American?
European. Eight of the eleven vendors in this ranking are EU-headquartered: three in France (Sweep, Greenly, Sami), two in Sweden (Position Green, Normative), and one each in Germany (Plan A), the Netherlands (Coolset) and Belgium (Greenomy).
Which tools are built specifically for CSRD and the EU Taxonomy, rather than general carbon accounting?
Coolset and Greenomy are the two vendors in this ranking built around named EU regulatory frameworks first. Coolset bundles nine modules including CSRD reporting, EU Taxonomy alignment, EUDR, EUTR, VSME and PPWR into one platform.
Is there a free tier for any of these tools?
Only one. Persefoni is the sole vendor in this ranking with a self-serve free option: Persefoni Pro is free with no trial period, covering Scope 1-3 accounting and a report builder for frameworks such as CSRD and ISSB.
Which vendors changed ownership in 2025?
Two did. Position Green Group, the Swedish vendor ranked fifth in this list, acquired the Brussels-based EU Taxonomy specialist Greenomy in September 2025.
What is the difference between carbon accounting software and full ESG or CSRD reporting software?
Carbon accounting software, the core of what Watershed, Sweep, Normative and Plan A do, measures greenhouse gas emissions across Scope 1, 2 and 3 and tracks progress against reduction targets.
Does any vendor here bundle software with human advisory services?
Three do, explicitly. Sami combines its Carbon Hub and ESG Hub software with consulting and training services. Position Green bundles software with sustainability advisory across its more than 1,000 customers.
Why do none of these vendors publish their pricing?
Real deployment cost depends heavily on entity count, historical data backlog, module selection and whether implementation or advisory services are bundled in, variables that differ enough between customers that most vendors prefer a scoped quote to a misleading list price.
Is Persefoni headquartered in Tempe or Mesa, Arizona?
Persefoni is generally cited as founded in Tempe, Arizona, but its own contact page lists its US office at a Mesa, Arizona address, alongside offices in Toronto, Munich, Tokyo, Singapore, London and Ho Chi Minh City.
