Best ESG & Sustainability Reporting Software in 2026
ESG and sustainability reporting software turns a company’s Scope 1-3 emissions data and supply-chain disclosures into the reports regulators, investors and customers now expect, from voluntary carbon accounting to mandatory EU frameworks like CSRD, ESRS and the EU Taxonomy.
This guide ranks 11 vendors on what actually separates them once the demo is over: how much setup effort a team faces before a first baseline is live, what the real annual cost becomes once modules and users are counted in a category where almost nothing is priced in public, whether the emissions and compliance data you build actually exports cleanly, and who controls the vendor behind the product.
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In short
What ESG & sustainability reporting software does
ESG and sustainability reporting software measures a company’s greenhouse gas emissions across Scope 1, 2 and 3, and turns that data into the disclosures needed for frameworks such as CSRD, the ESRS standards and the EU Taxonomy, often alongside decarbonisation planning to reduce the footprint it just measured.
In this order: setup effort, what it really costs, how your data comes back out, whether
you can leave, and who each ESG & sustainability reporting tool is built for. One rule sits on top of those tests:
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. Why those five, and why there is no
score out of ten, is on the how we work page.
Free plan (Persefoni Pro) with no time limit, GHG metrics reports as paid add-ons; Advanced quoted on request; California SB 253 and SB 261 reporting services published from $25,000 each, $40,000 as a bundle
Yes
US climate management and accounting SaaS with an advisory board including the founders of CDP, SASB and TCFD
Not published by the vendor; third-party estimates for enterprise deployments commonly cite a $50,000–$250,000+ annual range, unconfirmed by Watershed itself
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Enterprise sustainability AI platform managing emissions equivalent to four major economies combined
Quoted on request; the GHG plan has three named tiers (GHG Report Compliance, Climate Action Ready, Net Zero Contributor), with separate LCA and ESG plans, and no numeric prices published
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Paris carbon accounting platform for SMBs with three clearly named pricing tiers
Not published; greenomy.io now redirects to Position Green, which quotes on request after a demo, and the self-serve trial is no longer advertised
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Brussels EU Taxonomy and CSRD specialist acquired by Position Green in 2025, its website now redirecting there
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Country is where the vendor is headquartered or contracts from, which is a
different question from where your data is hosted. Where the two tell different stories, the
entry says so.
US climate management and accounting SaaS with an advisory board including the founders of CDP, SASB and TCFD
Ranked #1 of 11 in Best ESG & Sustainability Reporting Software in 2026.
Free tierPublished pricingNorth America
Persefoni's climate management and accounting SaaS is built to serve financial institutions as well as ordinary companies, which sets it apart from tools built only for corporate carbon reporting. Headquartered in Tempe, Arizona (also cited with a Mesa, Arizona corporate address in some directories), and founded in 2020 by Kentaro Kawamori (CEO), Jason Offerman (President & COO) and Kim Stroh (Chief Digital & Information Officer), its advisory board includes, per the vendor, the founders of CDP, SASB and TCFD.
Persefoni covers carbon footprint measurement, disclosure and reporting, and decarbonisation management, and lists Xerox, Caliber, Natera and the Pittsburgh Penguins among its named clients. Unusually for this category it has a free plan: Persefoni Pro covers Scope 1-3 footprints and a sustainability report builder with no trial period or time limit, while framework-specific GHG metrics reports are paid add-ons. The Advanced plan is quoted on request, and its done-for-you California SB 253 and SB 261 reporting services are listed from $25,000 each.
What stands out
Free plan (Pro) covering Scope 1-3
Advisory board includes CDP, SASB and TCFD founders
Serves companies and financial institutions
United StatesFree plan (Persefoni Pro) with no time limit, GHG metrics reports as paid add-ons; Advanced quoted on request; California SB 253 and SB 261 reporting services published from $25,000 each, $40,000 as a bundle
Swedish ESG software and advisory serving 1,000+ customers across 30+ countries
Ranked #2 of 11 in Best ESG & Sustainability Reporting Software in 2026.
Pricing on requestEurope
Position Green bundles CSRD, ESRS, EU Taxonomy and CSDDD compliance reporting with Scope 1-3 carbon accounting and supplier sustainability management, and, unlike most of this list, sells it together with advisory services rather than as software alone. Headquartered in Malmö and founded in 2015 by Daniel Gadd and Joachim Nahem, it states it now serves 1,000+ customers across 30+ countries from 10 offices, all in Europe.
Position Green has not been independently owned since April 2022, when Nordic private equity firm Norvestor acquired a majority stake, and in 2025 it turned acquirer itself, buying Morescope, Greenomy (#11 in this ranking) and Factlines. Greenomy's own website now redirects to Position Green, so two entries on this page lead to one company, which matters if vendor independence is part of your decision. Pricing is quoted on request and not published.
Stockholm carbon accounting pioneer bundling GHG Protocol-certified climate advisors into both of its plans
Ranked #3 of 11 in Best ESG & Sustainability Reporting Software in 2026.
Pricing on requestEurope
Normative predates the CSRD-driven wave of newer entrants in this category: it was founded in Stockholm in 2014 by Kristian Rönn, Adam Wamai Egesa and Robin Undall-Behrend, with additional offices in Copenhagen and London, making it one of the oldest vendors on this page. Its distinguishing feature is the service bundled with the software: both plans include a climate strategist and access to 20+ GHG Protocol-certified advisors, and the Premium plan adds a dedicated Climate Strategist.
The vendor states a database of 349,000 emission factors, promises a full baseline including Scope 3 in 8 to 12 weeks, and says it has consulted the European Commission and worked with the United Nations on an emissions accounting standard. Pricing is not published; both the Essential and Premium plans are quoted on request. On 15 September 2026 Normative and Greenly announced a merger, so check which product and contract a new buyer will be on.
What stands out
Founded 2014, one of the oldest in this category
349,000 emission factors
Climate strategist on both plans, a dedicated one on Premium
SwedenNot published; two plans (Essential and Premium), both quoted on request
Enterprise sustainability AI platform managing emissions equivalent to four major economies combined
Ranked #4 of 11 in Best ESG & Sustainability Reporting Software in 2026.
Pricing on requestNorth America
Watershed pairs an AI-assisted sustainability platform with one of the largest emissions-factor libraries in this category (the vendor states 2.3 million factors) plus a marketplace for carbon removal, clean power and sustainable aviation fuel projects that most competitors here do not offer. Headquartered in San Francisco with additional offices in London, New York, Sydney, Paris and Berlin, and a further office in Mexico City, it was founded in 2019 by Christian Anderson (CEO), Taylor Francis and Avi Itskovich.
The vendor states its customers manage more than the combined annual emissions of France, the UK, Germany and Italy, with a team of nearly 400 and named clients including Airbnb, Spotify, FedEx, Visa, Walmart, BlackRock, Stripe and four of the top six US banks. Watershed closed a $100M Series C in February 2024 at a $1.8B valuation, led by Greenoaks with Sequoia Capital and Kleiner Perkins, on $239M raised to date. It publishes no pricing anywhere on its own site; third-party reporting has put enterprise contracts in a $50,000–$250,000+ annual range, but that figure is an outside estimate, not one Watershed itself confirms, which is the main transparency drawback for a buyer trying to shortlist by cost.
What stands out
2.3 million emission factors in its library
Carbon removal and clean power marketplace
Backed by Sequoia and Kleiner Perkins
United StatesNot published by the vendor; third-party estimates for enterprise deployments commonly cite a $50,000–$250,000+ annual range, unconfirmed by Watershed itself
Dutch CSRD and EU Taxonomy platform bundling nine compliance modules in one product
Ranked #5 of 11 in Best ESG & Sustainability Reporting Software in 2026.
Pricing on requestEurope
Coolset is the youngest vendor in this ranking, founded in Amsterdam in 2022, and it is also the most explicitly EU-compliance-shaped entry here: nine named modules cover CSRD, EU Taxonomy, GHG Scope 1-3, EUDR (plus a simplified EUDR-for-SME edition), EUTR, VSME, PPWR and EcoVadis preparation. The company is headquartered at Egelantiersgracht 572 in Amsterdam, with a secondary office in Lelystad.
Every module is quoted individually rather than listed on a public rate card, but the vendor states onboarding and a dedicated customer success manager are included at no extra cost on every module, and the base platform carries unlimited users. Being the newest company on this page also means the shortest track record of the eleven — worth weighing if you want a vendor with years of renewal history behind it.
What stands out
9 named compliance modules (CSRD, EU Taxonomy, EUDR, EUTR, VSME, PPWR...)
Unlimited users on base platform
Onboarding and CSM included at no extra cost
NetherlandsQuoted per module; no numeric pricing published by the vendor
Paris-founded carbon and ESG platform named a Leader in the 2026 IDC MarketScape and Verdantix Green Quadrant
Ranked #6 of 11 in Best ESG & Sustainability Reporting Software in 2026.
Pricing on requestEurope
Sweep covers measurement, reporting and reduction of Scope 1-3 emissions and broader ESG data across a company's value chain, and has built a credibility case around outside recognition: it is B Corp certified, registered as an Entreprise à Mission under French law, and named a Leader in both the 2026 IDC MarketScape and the 2026 Verdantix Green Quadrant.
Founded in Paris in 2020 by Rachel Delacour (CEO), Yannick Chaze (CTO) and Raphael Güller (CPO), Sweep also has an office in London and opened a Denver, Colorado office in 2025. It is a member of the World Bank's Carbon Pricing Leadership Coalition, France Invest and the International Emissions Trading Association. Pricing is not published anywhere on its site; it is quoted after a demo.
Berlin decarbonisation-first carbon accounting platform, GHG Protocol compliant and TÜV Rheinland certified
Ranked #7 of 11 in Best ESG & Sustainability Reporting Software in 2026.
Pricing on requestEurope
Plan A goes beyond measurement into AI-assisted decarbonisation modelling and target-setting, emphasising turning a footprint into a reduction plan rather than a report alone, on top of Scope 1-3 carbon accounting and disclosure reporting. Its methodology is GHG Protocol compliant and TÜV Rheinland certified, and the company itself is B Corp and SOC 2 compliant — a heavier certification stack than most competitors here publish.
Headquartered in Berlin with an additional office in Paris, and founded in 2017 by Lubomila Jordanova and Nathan Bonnisseau, Plan A lists BMW, Visa, KFC, Sorare, Alphabet and Mollie as clients on its own site, and has raised roughly $40M in total, including a $27M round in 2023. Pricing itself is quoted on request and not published.
Paris carbon accounting platform for SMBs with three clearly named pricing tiers
Ranked #8 of 11 in Best ESG & Sustainability Reporting Software in 2026.
Pricing on requestEurope
Greenly is lighter-weight than the enterprise suites elsewhere on this list; the vendor counts 4,000 clients from SMB to enterprise, but its tiers and support model suit SMB and mid-market buyers best. It covers Scope 1-3 carbon accounting and compliance support for TCFD, SBTi, CBAM and EUDR, with life-cycle analysis sold as a separate plan. Founded in Paris in 2019 and headquartered there since.
Its pricing page names three tiers for the GHG plan (GHG Report Compliance, Climate Action Ready and Net Zero Contributor), differentiated by measurement depth, reduction planning and support, alongside separate LCA and ESG plans, but attaches no numbers to any of them; every tier is a sales conversation rather than a checkout page. On 15 September 2026 Greenly and Normative announced a merger, so check which product and contract a new buyer will be on.
What stands out
4,000 clients from SMB to enterprise, per vendor
Life cycle analysis (LCA) as a separate plan
Covers TCFD, SBTi, CBAM, EUDR
FranceQuoted on request; the GHG plan has three named tiers (GHG Report Compliance, Climate Action Ready, Net Zero Contributor), with separate LCA and ESG plans, and no numeric prices published
US public company (NYSE: WK) offering ESG reporting as one module inside a broader connected-reporting platform
Ranked #9 of 11 in Best ESG & Sustainability Reporting Software in 2026.
Pricing on requestNorth America
Workiva is not a dedicated ESG tool: it is a public, NYSE-listed (WK) connected-reporting platform headquartered in Ames, Iowa, launched in 2008 as WebFilings, rebranded Workiva and taken public via IPO in 2014. Sustainability and ESG reporting is one module inside a much broader suite that also handles SEC and statutory reporting, SOX internal controls and internal audit — rather than a dedicated point solution.
The vendor states it serves more than 6,700 customers, including over 85% of the Fortune 1000, the widest install base in this ranking. That breadth is also the catch for a buyer who wants only carbon accounting and CSRD disclosure: you are adopting a much bigger GRC platform to get it, with the procurement process that implies. Pricing is quoted on request and not published.
What stands out
Public company since 2014 IPO
ESG reporting alongside SEC/statutory reporting and SOX
Paris decarbonisation and ESG platform with 2,000+ clients, majority-owned by Swiss testing group SGS since Nov 2025
Ranked #10 of 11 in Best ESG & Sustainability Reporting Software in 2026.
Pricing on requestEurope
Sami combines a Carbon Hub (Scope 1-3 measurement, net-zero strategy) with an ESG Hub for sustainability reporting, plus its own consulting and training arm. Headquartered in Paris, with additional French offices in Marseille, Bordeaux and Lyon and a further office in London, it was founded in March 2020, states a database of 300,000+ emission factors and more than 2,000 clients across Europe, and holds GHG Protocol, ISO 27001 and B Corp certifications.
The fact that matters most for a buyer weighing independence: in November 2025, Geneva-headquartered testing and certification group SGS SA acquired a majority stake in Sami. The company remains Paris-headquartered and French-registered, but its controlling shareholder since that date is SGS. Pricing is quoted on request; the vendor describes its own positioning as enterprise-grade capabilities at SME-mid-cap pricing, with no numbers published.
What stands out
GHG Protocol, ISO 27001 and B Corp certified
2,000+ clients across Europe
300,000+ emission factors
FranceQuoted on request; vendor describes positioning as enterprise-grade capabilities at SME-mid-cap pricing, no numbers published
Brussels EU Taxonomy and CSRD specialist acquired by Position Green in 2025, its website now redirecting there
Ranked #11 of 11 in Best ESG & Sustainability Reporting Software in 2026.
Pricing on requestEurope
Greenomy is narrower than most of this list by design: EU Taxonomy alignment, CSRD and VSME reporting, built for corporates, credit institutions and asset managers, and distributed partly through PwC Belgium, Deloitte and Accenture. Founded in Brussels in 2020 and based at 54 Avenue Louise, it was majority-owned by Euroclear from 2022 until Position Green Group (#5 in this ranking) acquired it in September 2025.
The brand has since been folded in: greenomy.io now redirects to Position Green's own site, the Avenue Louise address is listed as Position Green's Brussels office, and the self-serve trial this entry used to note is no longer advertised. In practice, buying Greenomy now means a Position Green sales conversation, with pricing quoted on request.
What stands out
Part of Position Green since September 2025
Narrow focus: EU Taxonomy, CSRD and VSME reporting
Distribution alliances with PwC Belgium, Deloitte, Accenture
BelgiumNot published; greenomy.io now redirects to Position Green, which quotes on request after a demo, and the self-serve trial is no longer advertised
How to choose ESG & sustainability reporting software
ESG and sustainability reporting software measures a company’s greenhouse gas emissions across Scope 1, 2 and 3, and turns that data into the disclosures needed for frameworks such as CSRD, the ESRS standards and the EU Taxonomy, often alongside decarbonisation planning to reduce the footprint it just measured. The differences that matter are rarely in the feature list, so this is
the order we would work through them.
01
Decide whether you need a published price
1 of the 11 tools here publish what they cost; the other 10 quote per organisation. The ones you can compare without a sales call: Persefoni.
02
Decide how much the jurisdiction matters
These 11 vendors are established in 6 countries across 2 regions (Europe 8, North America 3). That decides whose disclosure law applies to what the vendor holds, wherever the servers are.
Carbon accounting and disclosure are two products sold under one label
Normative, Plan A, Greenly and Watershed start from the footprint: emission factor libraries, Scope 1-3 measurement and reduction planning. Coolset, Greenomy and Position Green start from the regulation, with modules for CSRD, EU Taxonomy and related rules.
Workiva treats sustainability as one module beside SEC filings and SOX controls. The right starting point depends on who is demanding the numbers.
Write down which frameworks you must file under and ask each vendor to produce that exact output.
Ask how your activity data is matched to emission factors and which factor database is used.
If finance owns the report, check how sustainability figures tie to statutory reporting.
Software alone, or software with an adviser attached
Normative includes a climate strategist and access to 20+ GHG Protocol-certified advisors on both plans, with a dedicated strategist on Premium, Position Green sells advisory services together with the platform, Sami runs its own consulting and training arm, and Coolset includes onboarding and a customer success manager on every module.
For a first-year team without a sustainability specialist that help is the product; an experienced team may not need it.
Ask how many adviser hours are included and what further hours cost.
Check whether your existing consultants and auditors can work inside the platform.
Ask who at the vendor reviews your first baseline before it is reported.
Hardly anyone publishes a price, so negotiate the meter
Almost no vendor on this page lists a number. Coolset quotes each module separately yet carries unlimited users on the base platform; Greenly names three tiers without prices; Sami describes itself as enterprise capability at SME and mid-cap pricing; Watershed's cost is known only from outside estimates.
Persefoni is the exception: its Pro plan is free with no time limit, and its California SB 253 and SB 261 reporting services are listed from $25,000.
Ask each vendor what the quote scales with: modules, entities, users or suppliers.
Get prices for the regulations you expect to add next year written into the first quote.
Check which reports are paid add-ons on Persefoni's free Pro plan before relying on it.
Built for a mid-sized company, an enterprise or a bank
Greenly is the lighter product, built for SMB and mid-market; Watershed and Workiva serve large enterprises; Persefoni and Greenomy also serve financial institutions and asset managers.
Ownership is shifting as well: Position Green bought Greenomy in 2025 and SGS took a majority stake in Sami, while Coolset, founded in 2022, has the shortest track record on the page.
Ask for a reference customer in your sector and of your size.
If you lend or invest, ask to see reporting on a portfolio, not just on your own operations.
Ask Position Green whether Greenomy stays a separate product or is being merged into its own platform.
What goes wrong most often when buying ESG & sustainability reporting software
Buying a carbon accounting tool and learning at filing time that the mandatory disclosure needs another module or another product.
Adopting Workiva's whole connected-reporting platform when the requirement was a footprint and a CSRD disclosure.
Accepting a quote for a single module without prices for the regulations you will add next year.
Expecting the software to solve Scope 3 when collecting supplier data is the work that delays a first baseline.
07
Frequently asked questions
6 answers
What is the best ESG & sustainability reporting software in 2026?
Persefoni leads our ranking of 11. Persefoni's climate management and accounting SaaS is built to serve financial institutions as well as ordinary companies, which sets it apart from tools built only for corporate carbon reporting. Headquartered in Tempe, Arizona (also cited with a Mesa, Arizona corporate address in some directories), and founded in 2020 by Kentaro Kawamori (CEO), Jason Offerman (President & COO) and Kim Stroh (Chief Digital & Information Officer), its advisory board includes, per the vendor, the founders of CDP, SASB and TCFD.
Persefoni covers carbon footprint measurement, disclosure and reporting, and decarbonisation management, and lists Xerox, Caliber, Natera and the Pittsburgh Penguins among its named clients. Unusually for this category it has a free plan: Persefoni Pro covers Scope 1-3 footprints and a sustainability report builder with no trial period or time limit, while framework-specific GHG metrics reports are paid add-ons. The Advanced plan is quoted on request, and its done-for-you California SB 253 and SB 261 reporting services are listed from $25,000 each.
Which ESG & sustainability reporting tools publish their pricing?
1 of the 11, with the pricing model each one publishes:
Persefoni: Free plan (Persefoni Pro) with no time limit, GHG metrics reports as paid add-ons; Advanced quoted on request; California SB 253 and SB 261 reporting services published from $25,000 each, $40,000 as a bundle.
The other 10 quote per organisation.
Is there a free ESG & sustainability reporting tool?
Persefoni offer a free tier or a free self-hosted edition.
Where are these ESG & sustainability reporting software vendors established?
In 6 countries across 2 regions: Europe 8, North America 3.
Persefoni: United States.
Position Green: Sweden.
Normative: Sweden.
Watershed: United States.
Coolset: Netherlands.
Sweep: France.
Plan A: Germany.
Greenly: France.
Workiva: United States.
Sami: France.
Greenomy (now Position Green): Belgium.
What should you use instead of Persefoni?
Position Green and Normative are the next two on this page. Position Green is for Swedish ESG software and advisory serving 1,000+ customers across 30+ countries; Normative is for Stockholm carbon accounting pioneer bundling GHG Protocol-certified climate advisors into both of its plans.
Who should not buy Persefoni?
Persefoni's climate management and accounting SaaS is built to serve financial institutions as well as ordinary companies, which sets it apart from tools built only for corporate carbon reporting. Headquartered in Tempe, Arizona (also cited with a Mesa, Arizona corporate address in some directories), and founded in 2020 by Kentaro Kawamori (CEO), Jason Offerman (President & COO) and Kim Stroh (Chief Digital & Information Officer), its advisory board includes, per the vendor, the founders of CDP, SASB and TCFD.
Persefoni covers carbon footprint measurement, disclosure and reporting, and decarbonisation management, and lists Xerox, Caliber, Natera and the Pittsburgh Penguins among its named clients. Unusually for this category it has a free plan: Persefoni Pro covers Scope 1-3 footprints and a sustainability report builder with no trial period or time limit, while framework-specific GHG metrics reports are paid add-ons. The Advanced plan is quoted on request, and its done-for-you California SB 253 and SB 261 reporting services are listed from $25,000 each.
If your ESG & sustainability reporting software product belongs among these 11, tell us what it does and who it is for. Inclusion is an editorial call; what a listing is and is not is set out under software advice.
