Software · IFRS S2 and UK SRS, vendor by vendor
IFRS and UK SRS software compared: Climatiq, Greenly, Normative, Persefoni, Sweep and Watershed
Greenly, Persefoni and Sweep each describe IFRS S1/S2 or ISSB reporting on their own pages, and Greenly and Sweep also name UK SRS.
Normative, Watershed and Climatiq describe the GHG measurement those standards rest on; we found no IFRS-specific claim on the pages we read, which is a question to ask, not a finding.
The six platforms
What does each platform say it does for IFRS S2 and UK SRS?
Each card quotes the platform’s own site, with the link, in alphabetical order.
Climatiq
In its own words: “Climatiq delivers the reliable data, easy-to-use tools, and deep integrations businesses need to understand their carbon impact”
On ISSB / IFRS S2: No ISSB claim found on the pages we read; a question to put to Climatiq in writing.
On UK SRS: No UK SRS claim found on the pages we read; a question to put to Climatiq in writing.
Scope 3: Leverage spend data using any taxonomy to estimate scope 3.1 carbon emissions.
No acquisition found on its own site.
Greenly
In its own words: “Measure, report, and reduce your company's emissions on one audit-ready sustainability management platform”
On ISSB / IFRS S2: “Automate compliance with IFRS S1/S2 and TCFD-aligned GHG reporting”
On UK SRS: “Connect your GHG Protocol data to UK SRS reporting”
Scope 3: Validated supplier data replaces spend-based estimates in your Scope 3 footprint automatically.
Merging with Normative, announced September 2026; see what the merger changes for customers.
Normative
In its own words: “Normative is a carbon accounting platform that helps companies calculate, report, and reduce Scope 1, 2, and 3 emissions using 349,000 verified emission factors”
On ISSB / IFRS S2: No ISSB claim found on the pages we read; a question to put to Normative in writing.
On UK SRS: No UK SRS claim found on the pages we read; a question to put to Normative in writing.
Merging with Greenly, announced September 2026; see what the merger changes for customers.
Persefoni
In its own words: Persefoni describes software and AI tools to manage an organisation’s “sustainability data, disclosures, and performance”.
On ISSB / IFRS S2: An “ISSB GHG Metrics Report”, a paid add-on to the free Pro plan
On UK SRS: No UK SRS claim found on the pages we read; a question to put to Persefoni in writing.
Scope 3: Scope 1, 2, and 3 carbon footprints for businesses of all sizes and complexities.
Diligent announced on 22 October 2025 that it will transition its carbon accounting clients to Persefoni and take an equity position in Persefoni; Persefoni remains its own company.
Sweep
In its own words: “Sweep's AI turns sustainability data into measurable business performance”
On ISSB / IFRS S2: Maps one dataset to “UK SRS, CSRD, ISSB, GRI, CDP, SASB, and TCFD”
On UK SRS: “Pre-mapped to UK SRS S1 and UK SRS S2”
No acquisition found on its own site.
Watershed
On ISSB / IFRS S2: No ISSB claim found on the pages we read; a question to put to Watershed in writing.
On UK SRS: No UK SRS claim found on the pages we read; a question to put to Watershed in writing.
No acquisition found on its own site.
Claims read 11 October 2026 and 30 September–1 October 2026. A missing claim is a question for the vendor, not evidence that the product lacks the capability.
The test for all six
What must an IFRS S2 tool produce? The metrics and the judgements behind them
IFRS S2 asks for Scope 1, 2 and 3 greenhouse gas emissions measured under the GHG Protocol, with the measurement approach and its inputs.
UK SRS S1 and S2, published by the Department for Business and Trade on 25 February 2026, adopt the ISSB baseline with UK amendments (DBT).
The full criteria list for any tool, with no vendor named, is on IFRS sustainability reporting software.
IFRS S2 outputs
Scope 1, 2 and 3
IFRS S2 outputs
Location-based Scope 2
IFRS S2 outputs
Same period as the accounts
Every ISSB claim
Which other platforms say they support ISSB?
35 of the 73 vendors in our registry describe ISSB or IFRS S2 support on their own pages; switch to UK SRS to see the 8 that name it.
What vendors say about one regime · read 11 October 2026 and 30 September–1 October 2026
Each cell is the vendor’s own description of itself, linked to the page it is on.
A missing claim is a question to put to the vendor in writing, not evidence that the product lacks the capability.
UK listed companies
Is UK SRS reporting required? Comply or explain, from 2027
Under FCA PS26/19, 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.
So a platform that maps to both ISSB and UK SRS saves a UK group a translation step; ask each one how it handles the UK amendments.
In the demo
What should you ask each platform to show? Five requests
| Ask | A good answer | Source |
|---|---|---|
| Show Scope 1, 2 and 3 for our financial year. | The same period as the accounts, by GHG Protocol category. | UK SRS S1 |
| Show location-based Scope 2 and its factors. | Location-based first; market-based alongside if contracted. | UK SRS S2 |
| Show the disclosure mapped to UK SRS, not only ISSB. | The UK amendments handled, not a generic ISSB template. | DBT response |
| Show the Scope 3 data-quality information. | Which categories use supplier data and which estimates. | Scope 3 Standard |
| Export the evidence behind one figure. | Source, factor, estimate basis, reviewer. | ISSA 5000 |
Ownership in 2026
Has anything changed for these platforms? Two announcements
A method change matters because IFRS S2 asks for changes in measurement approach and the reasons.
If your platform merges or changes method, ask for both figures side by side before the period closes.
Two 2025–26 events
Greenly and Normative
Two 2025–26 events
Persefoni and Diligent
Two 2025–26 events
Climatiq, Sweep, Watershed
The standard sets the output, and every one of these platforms can be asked to show it.
Before you choose
What does this come down to?
| Fact | So |
|---|---|
| 35 registry vendors claim ISSB | Test each on your own data, for your own period. |
| UK SRS is comply or explain from 2027 | Ask for the UK mapping, not just ISSB. |
| IFRS S2 rests on the GHG Protocol | Measurement-first platforms are part of the answer. |
| Greenly and Normative are merging | Confirm your platform and method in writing. |
Take the criteria on IFRS sustainability reporting software into each demo.
Frequently asked
IFRS and UK SRS software compared, answered
Which software is best for IFRS S2 and UK SRS?
This site has tested no product and names no best.
The six platforms here are set out in their own words, alphabetically; the test for each is whether it produces the IFRS S2 metrics with the judgements behind them, for the same period as your accounts.
How does Greenly handle IFRS sustainability standards?
Greenly says it can “Automate compliance with IFRS S1/S2 and TCFD-aligned GHG reporting”, and has a UK SRS page: “Connect your GHG Protocol data to UK SRS reporting”. It announced a merger with Normative in September 2026.
How does Sweep handle IFRS and UK SRS?
Sweep says its reporting is “Pre-mapped to UK SRS S1 and UK SRS S2”, and that one dataset maps to “UK SRS, CSRD, ISSB, GRI, CDP, SASB, and TCFD”.
How does Persefoni handle ISSB reporting?
Persefoni’s pricing page lists an “ISSB GHG Metrics Report” as a paid add-on to its free Pro plan, and says its Sustainability Report Builder covers ISSB, CSRD and CDP.
How does Normative handle IFRS sustainability standards?
We found no IFRS- or UK SRS-specific claim on the Normative pages we read.
Normative describes Scope 1, 2 and 3 “built to GHG Protocol standards, independently verified”, which is the measurement IFRS S2 rests on; ask Normative in writing how it maps to IFRS S2, and note its merger with Greenly.
How does Watershed handle IFRS sustainability standards?
We found no IFRS- or UK SRS-specific claim on the Watershed pages we read.
Watershed names TCFD, CSRD, SDR and CDP among the reporting it works on, and describes supplier emissions measurement; ask it in writing for its IFRS S2 output.
How does Climatiq handle IFRS sustainability standards?
Climatiq describes emission factor data, tools and integrations, including an API for Scope 3 estimates from spend data.
We found no IFRS-specific claim; it is a data layer other tools build on.
Is UK SRS mandatory for listed companies?
No. Under FCA PS26/19, companies in UKLR 6, 14, 15, 16 and 22 report on a comply-or-explain basis for periods beginning on or after 1 January 2027.
Is there ISSB-compliant software?
IFRS S1 and S2 say nothing about software: an entity states compliance for its report, and only when every requirement is met (IFRS S1 ¶72).
Treat “ISSB-compliant software” as a vendor statement to test on your data.
Does IFRS S2 require digital tagging?
Not by itself.
The IFRS Sustainability Disclosure Taxonomy provides tags and adds no new requirement; tagging depends on the jurisdiction.
How many vendors claim ISSB or UK SRS support?
In our registry of 73 vendors, read 11 October 2026 and 30 September–1 October 2026, 35 make an ISSB or IFRS S2 claim and 8 a UK SRS claim on their own pages.
Sources
Primary sources
Every figure, date and status on this page traces to the instrument’s owner.
Secondary commentary is never the source for a number.
- IFRS FoundationIFRS S1 General Requirements for Disclosure of Sustainability-related Financial Information
Including ¶72, the explicit statement of compliance.
- IFRS FoundationIFRS S2 Climate-related Disclosures
Scope 1, 2 and 3 under the GHG Protocol, ¶29(a).
- IFRS FoundationInternational Sustainability Standards Board
The standard-setter.
- IFRS FoundationIFRS Sustainability Disclosure Taxonomy
Digital tags; introduces no new requirement.
- Department for Business and TradeUK SRS S1 and UK SRS S2
Published 25 February 2026.
- Department for Business and TradeUK SRS S1 General Requirements (PDF)
Same reporting period as the financial statements.
- Department for Business and TradeUK SRS S2 Climate-related Disclosures (PDF)
Location-based Scope 2; no prescribed factors.
- Department for Business and TradeUK SRS guidance
How the UK standards are to be used.
- Department for Business and TradeGovernment response on the UK SRS exposure drafts
The UK amendments to the ISSB baseline.
- Financial Conduct AuthorityPS26/19: aligning listed issuers’ sustainability disclosures with international standards
Comply or explain for UKLR 6, 14, 15, 16 and 22, periods beginning on or after 1 January 2027.
- Financial Conduct AuthorityPS26/19 (PDF)
The final rules.
- Financial Reporting CouncilSustainability reporting developments: FAQs
The FRC’s position on UK sustainability reporting.
- GHG Protocol (WRI, WBCSD)Corporate Accounting and Reporting Standard
The measurement basis IFRS S2 requires.
- GHG ProtocolCorporate Value Chain (Scope 3) Standard
The Scope 3 categories.
- IAASBISSA 5000 General Requirements for Sustainability Assurance
The assurance standard an audit trail will meet.
- ClimatiqClimatiq: own product pages
The vendor’s own description, read 11 October 2026.
- GreenlyGreenly: own product pages
The vendor’s own description, read 30 September–1 October 2026.
- NormativeNormative: own product pages
The vendor’s own description, read 30 September–1 October 2026.
- PersefoniPersefoni: own product pages
The vendor’s own description, read 30 September–1 October 2026.
- SweepSweep: own product pages
The vendor’s own description, read 30 September–1 October 2026.
- WatershedWatershed: own product pages
The vendor’s own description, read 30 September–1 October 2026.