Carbon reporting software — UK guide

Choose wrong and the lock-in is not the contract — it is a data model you cannot walk away with: emissions history trapped in a vendor format, methodology that lives only inside the tool, an audit trail an assurer cannot follow.

The ESOS leg has its own tooling question: managing ESOS online covers the digital route from meter feeds to notification, and the two stages that stay human.

So before any demo, know which regimes actually bind you. Put your numbers in.

Photo: Unsplash / Nicholas Doherty

07 · SECR software

SECR reporting software

The reporting duty most UK companies meet first.

SECR is the reporting duty most UK companies meet first — and the best software for SECR reporting in the UK is the software that produces the statutory SECR format on its own, with no configuration project.

Three of the seventeen do: Climatise (our overall pick, built around SECR, ESOS and UK SRS), Emitwise (strongest on supplier Scope 3 for manufacturers) and Seedling (SME-friendly, with a dedicated adviser).

What “native” means here, since it is the number people quote: the platform produces the statutory SECR energy-and-emissions statement as shipped, with no configuration project. Several more will produce it once configured — a different claim, and one a vendor is happy to let you conflate. Those are marked “~” rather than “✓” in the comparison table.

All three apply the current-year DESNZ conversion factors automatically, and produce the energy-and-emissions figures your SECR disclosure needs for the directors’ report under the 2018 SECR regulations. Be exact about what those regulations say, because vendors are not: they require the statement, and they require you to state the methodology you used. They do not name an official factor set. Applying the DESNZ factors is the convention every UK preparer follows and what HM Government’s Environmental Reporting Guidelines assume — not a statutory instruction. A platform that lets you pin an old factor year is not breaking the law; it is breaking your comparability, which is worse to explain to an auditor.

Global suites such as Watershed and Workiva can get there too, but usually need extra setupTheir SECR output is configured, not native — budget a mapping exercise before the first directors’ report. — check who must report under SECR before you buy anything.

What separates UK-compliant SECR reporting software from a generic ESG tool with SECR bolted on? Three things:

Judged against that bar, the strongest UK SECR carbon accounting platforms in our review are Climatise, Emitwise and Seedling — each reviewed in full below alongside all 17 platforms we assessed. If your search is for a lighter-weight SECR tool rather than a full multi-framework suite, Seedling’s SME-focused plan and Climatise’s SECR-first configuration are the two worth shortlisting first.

Photo: Unsplash / Zac Wolff

11 · The same category, by its other name

GHG reporting software and greenhouse gas accounting tools

One methodology underneath every label.

Search for GHG reporting software, greenhouse gas accounting software or emissions tracking tools and you are describing the same seventeen platforms — the vocabulary changes, the market does not.

The reason is that every serious platform builds on one methodology: the GHG Protocol Corporate Standard, which defines the greenhouse gases counted, the Scope 1–2–3 structure and the consolidation rules.

A “greenhouse gas software” product that cannot show you its GHG Protocol alignment is not a category alternative — it is a red flag, as our GHG Protocol guide sets out.

If the mechanics are what you came for — which gases, which consolidation approach, and what a platform has to hold to satisfy each part of the standard — that is a separate guide. GHG reporting software takes the requirements in turn and gives you the test to run on a demo for each one. This page stays on the procurement question: which of the seventeen belongs on your shortlist.

It is not the only inventory standard. Some UK organisations quantify to ISO 14064-1 instead of, or alongside, the GHG Protocol — particularly where a certification body will verify the inventory. “Which inventory standard does the tool implement?” is a fairer demo question than “are you GHG Protocol compliant?”, because every vendor answers yes to the second.

The other thing worth asking about is Scope 2. A UK market-based figure rests on renewable supply backed by REGO certificates, which Ofgem administers. Reporting both a location-based and a market-based figure is what the GHG Protocol Scope 2 Guidance asks for — so the real question is whether the platform reports the two separately and can hold the certificate evidence behind the market-based number.

Jurisdictional variants exist — SEC climate-disclosure tooling in the US, NGER reporting software in Australia — but for UK buyers the binding outputs are SECR and UK SRS, and those are the two this review scores natively.

If your search started from “emissions reporting software” for permitted industrial sites — air-quality and pollutant returns rather than greenhouse gases — that is a different product category from the corporate carbon platforms reviewed here, and none of the seventeen is designed for it.

Photo: Unsplash / Paula Prekopova

14 · The shortcut

Carbon reporting software by company type and sector

Different sectors, different Scope 3 shapes.

Every recommendation below restates a claim from the seventeen reviews — the matcher computes the same logic interactively.

In the SECR native column, ✓ means the platform produces the statutory SECR energy-and-emissions statement as shipped, with no configuration project — three of the seventeen do. ~ means it is supported via configuration or an add-on. All 15 Scope 3 categories are defined by the GHG Protocol’s Corporate Value Chain (Scope 3) Standard — see our GHG Protocol guide.

A price appears on this page only when live research confirms the vendor publishes it, linked and dated. Assurance remains a separate cost the software does not include. Sourcing: methodology and the fit-matrix research record.

Then pick your financial year-end and we’ll place the SECR, ESOS and UK SRS dates on your own calendar. Filing windows follow Companies House accounts deadlines — 9 months from the accounting reference date for a private company, 6 for a public one, measured to the day the accounts are delivered. SECR sits inside the directors’ report, so the carbon number has to be closed inside that same window.

UK SRS S2 dates reflect the FCA CP26/5 proposal and may change at the autumn 2026 Policy Statement — check UK SRS deadlines before planning.