ESG software comparison — UK SRS-ready platforms
Major ESG software platforms compared for UK preparers in 2026: enterprise sustainability suites (Workiva, Microsoft Sustainability Cloud, IBM Envizi, Salesforce Net Zero Cloud), pure-play carbon platforms (Watershed, Persefoni, Sweep, Climatise) and SME-focused tools (Greenly, Plan A). Reviewed for UK SRS, TCFD and SECR compliance.
Why ESG software matters
UK SRS, TCFD and SECR demand structured, audit-ready data across the three ESG pillars — with explicit connectivity to financial reporting. Software increasingly necessary above £100m turnover.
Three tiers of ESG software
Enterprise sustainability suites, pure-play carbon platforms and SME-focused tools. Each tier suits a different company size and use case.
- Tier 1 — Enterprise sustainability suites FTSE 100/250 · £100k–£500k/yr
- Workiva, Microsoft Sustainability Cloud, IBM Envizi, Salesforce Net Zero Cloud, Sphera. Full ESG scope (not just carbon), multi-framework mapping (UK SRS, IFRS S1/S2, ESRS, GRI, SASB, CDP), integration with ERP and financial consolidation, audit-ready evidence trail, climate scenario modelling. Used by Big Four for client reporting. See our carbon reporting software guide.
- Tier 2 — Mid-market carbon platforms Mid-market · £10k–£50k/yr
- Watershed, Persefoni, Sweep, Climatise, Plan A, Cority. Strong on emissions and carbon accounting across Scopes 1/2/3, with supplier engagement features. Less depth on broader ESG topics (social, governance) but increasingly extending into the full ESG scope. Best fit for mid-market companies focused on TCFD/UK SRS S2 climate reporting.
- Tier 3 — SME-focused tools SME · £5k–£15k/yr
- Greenly, Normative, Plan A (entry tier), Compare Your Footprint. Streamlined onboarding, often spreadsheet-based input, automated calculation for SECR and TCFD-light. Best fit for sub-£100m turnover companies starting their ESG reporting journey or under supply-chain pressure.
- Adjacent: ratings-data platforms Investor view
- MSCI, Sustainalytics, Moody's, S&P Global, ISS, Bloomberg. These provide ESG ratings and data to investors; UK companies engage with them to understand their public ESG rating and to provide additional disclosure data. From 29 June 2028, these providers require FCA authorisation under the ESG Ratings Order 2025.
Five features that matter for UK SRS compliance
What to ask software vendors when evaluating against UK SRS S2 requirements from 2027.
- 1. GHG Protocol methodology with UK conversion factors Foundation
- Calculation engine following GHG Protocol Corporate Standard, with DESNZ (BEIS) UK conversion factors updated annually. Both location-based and market-based Scope 2 methodologies. Auditable calculation logs.
- 2. Scope 3 across all 15 GHG Protocol categories Critical for UK SRS S2
- Supplier engagement workflows, spend-based and activity-based calculations, supplier emissions request templates. UK SRS S2 makes Scope 3 mandatory from year two — software with strong Scope 3 capability becomes essential.
- 3. TCFD and UK SRS S2 scenario analysis Strategic disclosure
- Built-in NGFS climate scenarios with sector translation; physical-risk modelling using IPCC AR6 RCPs / SSPs; financial-impact modelling templates. Increasingly important as UK SRS S2 demands quantitative scenario analysis with financial impact.
- 4. Assurance-ready evidence trail Critical for ISSA (UK) 5000
- Complete audit trail: source data, calculation methodology, change logs, sign-off workflows. The FRC's ISSA (UK) 5000 sustainability assurance standard (development 2026) will codify what assurers expect — software with mature evidence-trail features positions companies well.
- 5. Multi-framework mapping Practical
- Same data set mapped to UK SRS, IFRS S1/S2, ESRS, GRI, CDP, SASB without duplicate collection. The strongest platforms maintain real-time mapping as standards evolve.
Tier comparison
Enterprise vs mid-market vs SME tools compared across eight dimensions.
ESG software — frequently asked
Do you need it, what’s best for UK SRS, how much it costs, and which features matter for UK SRS compliance.
Do I need ESG software?
If you're already reporting under SECR, TCFD or preparing for UK SRS S2, dedicated software helps automate data collection, calculation under GHG Protocol, multi-framework mapping, audit trail and reporting output.
Smaller companies often start with spreadsheets and graduate to software once Scope 3 enters scope.
For UK SRS preparation, software increasingly becomes necessary because of the integrated reporting and assurance requirements.
What's the best ESG software for UK SRS?
It depends on company size and complexity.
Enterprise platforms (Workiva, Microsoft Sustainability Cloud, IBM Envizi, Salesforce Net Zero Cloud) suit FTSE 250+ groups needing connectivity to financial systems and multi-framework mapping.
Pure-play carbon platforms (Watershed, Persefoni, Sweep, Plan A, Climatise) suit mid-market companies focused on emissions.
Greenly suits SMEs.
See our full /carbon-reporting-software guide.
How much does ESG software cost?
Highly variable.
Enterprise ESG/sustainability platforms typically start around £30k-£100k per year for mid-market and run to £500k+ for FTSE 100.
Mid-market carbon platforms (Watershed, Persefoni, Sweep) typically start £10k-£50k per year.
SME platforms (Greenly, Plan A) start around £5k.
Pricing usually reflects scope (just carbon vs full ESG), boundary complexity, and bundled consulting.
What features matter for UK SRS compliance?
Five features matter most: (1) GHG Protocol calculation methodology with DESNZ conversion factors; (2) Scope 3 capability across 15 GHG Protocol categories; (3) TCFD scenario analysis support; (4) audit-ready evidence trail aligned with ISSA (UK) 5000 expectations; (5) integration with financial systems (ERP, consolidation tools) for UK SRS connectivity requirements.
The ESG guide set
From software, continue to strategy, data management, and the broader frameworks.
ESG reporting — UK hub
Three-layer UK system; UK SRS backbone; preparation roadmap.
Sister guideCarbon reporting software — full review
Independent reviews of 17 major UK carbon platforms.
CriteriaESG criteria
Practical criteria per pillar — what software must capture.
DataESG data management
Collection, verification, audit-readiness for UK reporting.
StrategyESG strategy
Board-level ESG integration and target-setting.
ExamplesESG reporting examples
UK case studies and reporting patterns.