IFRS S1 and S2
The ISSB’s own standards, issued June 2023; S2 amended December 2025.
For groups reporting outside the UK.Software · a buyer’s guide to ISSB tools
ISSB software: the IFRS S1 and S2 platforms, and how to choose
ISSB software helps a company prepare disclosures under IFRS S1 and IFRS S2, the International Sustainability Standards Board’s standards, and in the UK under their endorsed versions, UK SRS S1 and S2.
35 vendors in this site’s registry make an ISSB claim on their own pages; this page lists them in their own words and shows how to shortlist, test and buy.
How a tool should map disclosures and tags is on ISSB reporting software.
IFRS or UK SRS
Are you buying for IFRS S2, UK SRS S2, or both?
A UK group with listings or subsidiaries abroad may report against both, so the tool has to hold one dataset and show two views.
The government’s response explains why the UK versions differ; the differences are small but they change the output.
The mapping work is described on ISSB reporting software; this page is about the purchase.
ISSB
standards
standards
UK SRS S1 and S2
The UK’s endorsed versions, published 25 February 2026 with UK amendments.
For UK listed companies, comply or explain from 2027.The platforms
Which platforms say they support ISSB?
35 of the 73 vendors in this site’s registry make an ISSB or IFRS S2 claim on their own pages, read 11 October 2026 and 30 September–1 October 2026, listed alphabetically.
Each line is the vendor’s own, linked to the page that says it.
Japan
ASUENE
ISSB（国際サステナビリティ基準審議会）が策定した国際的な開示基準（IFRS S1・S2）に準拠した、ESG関連データの集計・報告を行います。
Price: Enterprise level · TBD
United Kingdom
CarbonChain
Price: Enterprise level · TBD
United States
Clarity AI
Our platform simplifies compliance with frameworks like CSRD, EU Taxonomy, Pillar 3, TCFD, and ISSB.
Price: Enterprise level · TBD
United Kingdom
Climatise
“Generate SECR, CSRD, ISSB, and custom reports”
Price: Enterprise level · TBD
Canada
Cority
“Global frameworks covered including CDP, GRI, TCFD, SASB, ISSB”
Price: Enterprise level · TBD
Headquarters not stated on its site
Datamaran
The platform supports specific compliance and regulatory requirements from ISSB to CSRD.
Price: Enterprise level · TBD
Spain
Dcycle
Price: Enterprise level · TBD
France
Deepki
Price: Enterprise level · TBD
United Kingdom
Diginex
AI-powered ESG reporting platform supporting 19 frameworks, including IFRS S1 and S2.
Price: Enterprise level · TBD
Netherlands
Enablon
Price: Enterprise level · TBD
Part of Wolters Kluwer since July 2016
United Kingdom
Evotix
Align every KPI to CSRD, ISSB/IFRS, SASB, CDP and your internal standards.
Price: Enterprise level · TBD
France
Greenly
“Automate compliance with IFRS S1/S2 and TCFD-aligned GHG reporting”
Price: Enterprise level · TBD
Merger with Normative announced, September 2026
United Kingdom
Ideagen
Generate audit-ready reports that meet CSRD, ASRS, IFRS, SECR & GHG Protocol standards.
Price: Enterprise level · TBD
Part of Hg since June 2022
Germany
IntegrityNext
Price: Enterprise level · TBD
United States
Measurabl
United States
Microsoft Sustainability Manager
Price: US$4,000 (Essentials) or US$12,000 (Premium) per tenant, per month
United Kingdom
Net Zero Now
Master TCFD / ISSB Reporting to Illuminate Climate Risks and Strategies
Price: Enterprise level · TBD
Part of Ecologi since February 2025
United Kingdom
Nossa Data
Price: Enterprise level · TBD
United States
Novata
Price: Novata for Companies: Manage 20K, Grow 50K, Lead 100K a year (currency not stated)
Canada
Novisto
Yes, Novisto supports other ISSB standards, including IFRS S1 and IFRS S2.
Price: Enterprise level · TBD
Germany
osapiens
Price: Enterprise level · TBD
United States
Persefoni
An “ISSB GHG Metrics Report”, a paid add-on to the free Pro plan
Price: Persefoni Pro “completely free”, single user; Advanced by quote
Sweden
Position Green
Price: Enterprise level · TBD
United States
Pulsora
Price: Enterprise level · TBD
Germany
SAP Sustainability Footprint Management
Price: Enterprise level · TBD
United Kingdom
Sedex
United States
SINAI Technologies
“Create reports for CSRD, CBAM, SEC, IFRS/ISSB, CDP, and more”
Price: Enterprise level · TBD
United States
Sphera
Disclosure content for “CSRD, GRI, CDP, IFRS/ISSB, EU Taxonomy”
Price: Enterprise level · TBD
Part of Blackstone since September 2021
France
Sweep
Maps one dataset to “UK SRS, CSRD, ISSB, GRI, CDP, SASB, and TCFD”
Price: Enterprise level · TBD
Singapore
Terrascope
Price: Enterprise level · TBD
Part of XeleratedFifty since February 2026
Headquarters not stated on its site
Trace
Price: Enterprise level · TBD
Singapore
Unravel Carbon
Price: Enterprise level · TBD
United States
Workiva Carbon
“Comply with regulatory frameworks like CSRD, ISSB…”
Price: Enterprise level · TBD
Sweden
Worldfavor
SASB / ISSB Disclose what investors in your sector consider material.
Price: A free plan for suppliers responding to data requests; buyer plans by quote
Headquarters not stated on its site
Zevero
Acquired, 2024 (buyer not named on its site)
35 vendors, alphabetically. Each line is the vendor’s own description, linked to the page it is on.
A vendor missing from this list may still do the work: put the question to it in writing.
The ISSB, in four datesExplore
From the list to three
How do you cut 35 platforms to three demos?
Tick UK SRS in the tool beside this text if you are a UK listed company: 6 vendors claim both on their own pages.
Tick Scope 3 if your value chain is large, because Scope 3 is where S2 reporting takes most of the effort.
Then cut by the part of S1 that is not climate: a tool built only for carbon may not hold wider sustainability-related risks.
Six well-known platforms are set side by side on IFRS and UK SRS software compared.
Your long list · from vendors’ own pages, read 11 October 2026 and 30 September–1 October 2026
Start: vendors whose own pages mention ISSB (35). Tick what else the same tool must serve.
35 of 35 vendors make every claim you ticked.
- ASUENE
- CarbonChain
- Clarity AI
- Climatise
- Cority
- Datamaran
- Dcycle
- Deepki
- Diginex
- Enablon
- Evotix
- Greenly
- Ideagen
- IntegrityNext
- Measurabl
- Microsoft Sustainability Manager
- Net Zero Now
- Nossa Data
- Novata
- Novisto
- osapiens
- Persefoni
- Position Green
- Pulsora
- SAP Sustainability Footprint Management
- Sedex
- SINAI Technologies
- Sphera
- Sweep
- Terrascope
- Trace
- Unravel Carbon
- Workiva Carbon
- Worldfavor
- Zevero
Alphabetical; the order ranks nothing. A claim is what a vendor says, not a test result.
Nothing you tick is stored or sent.
One group, start to finish
What does choosing look like for a UK group reporting abroad?
Group D is an illustration: a UK listed group with a subsidiary whose own market expects IFRS S2.
It ticks ISSB, UK SRS and Scope 3 in the long-list tool, then asks three vendors to produce both views from the same records.
The one that shows where the UK version differs, without a second dataset, goes forward.
Group D, two regimesExplore
Group D, two regimes
Abroad
A subsidiary asked by its own market for IFRS S2.
Group D, two regimes
Data
One emissions inventory, one risk register.
Group D, two regimes
Need
Two views from one dataset, with the differences shown.
Group D, two regimes
Shortlist
Vendors claiming ISSB and UK SRS, cut by Scope 3.
In the demo
What should you ask in an ISSB demo?
Ask the vendor to name the edition of IFRS S2 it implements before anything else.
Then ask for both the IFRS and the UK SRS view from your own data.
This site has tested no products
The questions test outputs; they score no one, and passing them is not an approval.
ISSB demo questions · tick the ones you need
The pass tests are our reading of the cited provisions.
Nothing you tick is stored or sent.
Assurance
Should ISSB software be built for assurance?
Vendors claiming ISSB
35In this site’s registryAlso claim UK SRS
6Of thoseAssurance required by PS26/19
NoA statement about it isPS26/19 asks a listed company to state whether it obtained third-party assurance and, if so, from whom, to what level and under which standard; it does not require assurance.
Assurance over sustainability information can be given under ISSA 5000 or, for emissions, ISAE 3410, and both need evidence a practitioner can follow.
The UK assurance picture is on sustainability assurance.
What an assurer readsExplore
What an assurer reads
Sustainability
The international standard for sustainability assurance.
What an assurer reads
Evidence
Every figure back to its source record.
After you sign
How does a first ISSB cycle run on new software?
- 01 / Scope01
- 02 / Risks02
- 03 / Metrics03
- 04 / Gaps04
- 05 / Publish05
No official timetable exists for setting up ISSB software; this order is this site’s, built from the standards cited.
Choose the ISSB tool that shows both the IFRS and the UK view from one set of records.
Two datasets mean two answers to the same question.
In short
ISSB software, in five facts
| Fact | What to do with it |
|---|---|
| 35 vendors claim ISSB on their own pages | Start from their own words, linked here. |
| 6 also claim UK SRS | Tick UK SRS in the long-list tool if you are listed in the UK. |
| UK SRS was published on 25 February 2026 | Ask which UK differences the tool handles. |
| Assurance is not required by PS26/19 | But the statement about it is, so keep the evidence. |
| The ISSB taxonomy adds no requirements | Pay for tagging only if your filing route needs it. |
Next: see how a tool should map disclosures and tags on ISSB reporting software.
Frequently asked
ISSB software, answered
What is ISSB software?
Software that helps a company prepare sustainability disclosures under the International Sustainability Standards Board’s standards: IFRS S1 for sustainability-related financial information in general and IFRS S2 for climate.
In the UK the endorsed versions are UK SRS S1 and S2.
Which software supports ISSB?
In this site’s registry, 35 vendors make an ISSB or IFRS S2 claim on their own pages, read 11 October 2026 and 30 September–1 October 2026; 6 also make a UK SRS claim.
They are listed here alphabetically, in their own words.
What is the best ISSB software?
This site has tested no product and names no best.
Choose the tool that produces both the IFRS and the UK SRS view from one dataset, names the edition of IFRS S2 it implements, and leaves evidence an assurer can use.
Is ISSB software the same as UK SRS software?
Close, not identical.
UK SRS S1 and S2 are the UK’s endorsed versions of IFRS S1 and S2, published on 25 February 2026 with UK amendments; a UK listed company reports against UK SRS on a comply-or-explain basis under FCA PS26/19.
Do UK companies have to use ISSB software?
No company has to use any software.
Listed companies in UKLR 6, 14, 15, 16 and 22 report against UK SRS on a comply-or-explain basis for periods beginning on or after 1 January 2027; for everyone else, UK SRS is voluntary.
Does ISSB software need XBRL tagging?
Only if a filing regime asks for it.
The ISSB’s taxonomy is for tagging disclosures and adds no disclosure requirements of its own; check whether your filing route needs tags before paying for them.
How much does ISSB software cost?
Most vendors on the list quote rather than publish.
Prices usually rise with entities, modules such as scenario analysis and value-chain emissions, and the number of frameworks covered.
Can ISSB software handle other countries’ versions?
Some vendors say so; check by asking for the jurisdictions the tool supports and the version of each, in writing.
New ISSB standards apply in the UK only once endorsed.
Do we need assurance features?
PS26/19 asks a listed company to say whether third-party assurance was obtained and, if so, from whom and to what level; it does not require assurance.
A tool that leaves a clean evidence trail makes either answer easier.
Who owns the data in ISSB software?
You do, with the vendor as processor under a written UK GDPR contract.
Read the exit terms before you sign.
How long does a first ISSB cycle take on new software?
There is no official figure.
The time goes on identifying sustainability-related risks and opportunities under S1, collecting Scope 3, and agreeing what will be explained rather than disclosed in the first year.
Sources
Primary sources
Every requirement on this page traces to a source listed here.
Vendor descriptions are cited to each vendor’s own page.
Checked against 17 sources fromIFRS FoundationDepartment for Business and TradeFinancial Conduct AuthorityGHG Protocol (WRI, WBCSD)GHG ProtocolIAASB
- IFRS FoundationInternational Sustainability Standards Board
Formed 3 November 2021.
- IFRS FoundationIFRS S1 General Requirements
Issued June 2023.
- IFRS FoundationIFRS S2 Climate-related Disclosures
Issued June 2023; amended December 2025.
- IFRS FoundationIFRS Foundation and the TCFD
IFRS S2 is consistent with the TCFD recommendations.
- IFRS FoundationISSB proposes update to the IFRS Sustainability Disclosure Taxonomy (July 2026)
The taxonomy adds no disclosure requirements.
- IFRS FoundationISSB overview
The board and its standards.
- Department for Business and TradeUK SRS S1 and S2
Published 25 February 2026 for voluntary use.
- Department for Business and TradeUK SRS S1 General Requirements (PDF)
The UK version of IFRS S1.
- Department for Business and TradeUK SRS S2 Climate-related Disclosures (PDF)
The UK version of IFRS S2.
- Department for Business and TradeGovernment response to the UK SRS consultation
Why the UK versions differ.
- Financial Conduct AuthorityPS26/19 — UK SRS reporting by listed companies
Comply or explain for periods beginning on or after 1 January 2027.
- Financial Conduct AuthorityPS26/19 (PDF)
The rules and the assurance statement.
- GHG Protocol (WRI, WBCSD)Corporate Accounting and Reporting Standard
The Scope 1 and 2 metrics underneath S2.
- GHG ProtocolCorporate Value Chain (Scope 3) Standard
Scope 3 under S2.
- IAASBISSA 5000 General Requirements for Sustainability Assurance Engagements
The international assurance standard.
- IAASBISAE 3410 Assurance Engagements on Greenhouse Gas Statements
Assurance over emissions.
- Information Commissioner’s OfficeUK GDPR: what needs to be included in a processor contract
The terms that govern a vendor holding your data.