Best carbon accounting software for real estate (2026)

The best carbon accounting software for real estate pulls energy, water and waste data from meters, bills and building systems, turns it into Scope 1, 2 and 3 emissions, and produces the reports investors and regulators ask for. Here are 9 platforms in 2026: four from the US, two from the UK and three from wider Europe. Every fact below comes from the vendor’s own site.

The list is grouped by market, not ranked, because the first question is which rules you report under: GRESB for investors almost everywhere, SECR and ESOS in the UK, SFDR and the EU Taxonomy in Europe. After that, it comes down to how the data gets in and who checks it.

At a glance

9 tools, grouped by market and not ranked. No vendor paid to be listed, and Zeroic isn't affiliated with any of them. Links and prices checked on October 17, 2026, from each vendor's own site.

Tool	Best for	Pricing
United States
Measurabl	Owners, operators and investors reporting to GRESB	Free solution; enterprise plans on request
Arc	LEED buildings and portfolios chasing GRESB points	Free; Arc Essentials $70.83/user/month billed annually
Atrius Sustainability	Corporate and campus portfolios that need assurance-ready data	On request
IBM Envizi	Enterprises whose property sits among many sites and suppliers	On request, priced by data volume
United Kingdom
Etainabl	UK landlords handling SECR, ESOS and tenant recharges	On request
EVORA SIERA	Real estate funds that want software plus a data team	On request
Europe
Deepki	Global portfolios managing carbon, climate risk and CapEx	On request
BuildingMinds	Funds in Europe reporting under SFDR and the EU Taxonomy	From €19.90 per building/month (Self-service)
Scaler	Managers tracking compliance across several countries	On request

United States

Measurabl

Best for owners, operators and investors reporting to GRESB · US

ESG data platform for real estate that tracks energy, carbon, water and waste and reports to frameworks such as GRESB and SFDR.

• Says over 1000 companies worldwide rely on it
• Free plan syncs with ENERGY STAR Portfolio Manager or takes bulk uploads
• Captures Scope 1, 2 and 3 emissions data with space-level precision

Measurabl pricing: Free solution; enterprise plans on request (pricing page)

Arc

Best for LEED buildings and portfolios chasing GRESB points · US

GBCI's platform to measure and score building performance, including portfolio greenhouse gas emissions and LEED readiness.

• Verified Performance Certificates earn GRESB points for energy ratings and operational building certification
• Enterprise pricing for teams with over 5 users or 25 projects

Arc pricing: Free; Arc Essentials $70.83/user/month billed annually (pricing page)

Atrius Sustainability

Best for corporate and campus portfolios that need assurance-ready data · US

Acuity's carbon accounting app that converts energy, water and waste data into Scope 1, 2 and 3 emissions and reports.

• Reports in one format for CDP, GRESB, SASB and TCFD Source
• Emission factors from EPA, UK DEFRA and eGRID, or your own Source
• Annual platform assurance document to file with a company's 10-K Source

Atrius Sustainability pricing: On request (pricing page)

IBM Envizi

Best for enterprises whose property sits among many sites and suppliers · US

IBM's ESG data suite with GHG Protocol emissions accounting, building ratings and benchmarks, and utility bill analysis.

• Bundles run from Essentials (up to 1,000 Accounts) to Premium (5,001-15,000+ Accounts)
• Emissions API to build calculations into your own software
• Customers include property group GPT Group

IBM Envizi pricing: On request, priced by data volume (pricing page)

United Kingdom

Etainabl

Best for UK landlords handling SECR, ESOS and tenant recharges · UK

Utility data platform for real estate that collects meter and invoice data and turns it into emissions reporting and bill validation.

• Outputs aligned with GRESB, SECR, TCFD, EPRA sBPR and Net Zero Carbon frameworks
• Scope 1, 2 and 3 calculated to GHG Protocol methodology
• Says go-live takes anywhere from a single day to about a month
• Reports ready to feed SECR, ESOS and GRESB submissions Source

Etainabl pricing: On request (pricing page)

EVORA SIERA

Best for real estate funds that want software plus a data team · UK

Sustainability data platform for real estate investors that gathers, validates and reports data from portfolio to asset.

• Four layers of data validation, including checks by EVORA's data team
• Backed by a team of 200+ sustainability data experts
• Open API to connect new systems and databases

EVORA SIERA pricing: On request (pricing page)

Europe

Deepki

Best for global portfolios managing carbon, climate risk and CapEx · Europe

Sustainability data platform for real estate that centralizes ESG data and tests CapEx plans against CRREM and custom targets.

• Says it is trusted by 600+ companies
• 7,300+ automated connectors and AI estimates trained on 60+ asset types
• Active across 90+ countries Source
• Holds a SOC 2 Type II report Source

Deepki pricing: On request (pricing page)

BuildingMinds

Best for funds in Europe reporting under SFDR and the EU Taxonomy · Europe

AI data platform for real estate decarbonization that collects invoices and meter data and automates GRESB, SFDR and CRREM reporting.

• Self-service covers up to 50 buildings; Enterprise is tailored to the portfolio
• ISO 27001 and SOC 2 certified, EU-hosted
• CRREM-validated decarbonization pathways included

BuildingMinds pricing: From €19.90 per building/month (Self-service) (pricing page)

Scaler

Best for managers tracking compliance across several countries · Europe

Data platform for real estate that tracks EPC, BPS and NABERS per asset and CSRD, SFDR and EU Taxonomy per portfolio.

• Ranks CapEx by ROI, from one asset to 25,000
• Shows retrofit ROI and CRREM alignment as data lands
• Founded in 2021 Source

Scaler pricing: On request (pricing page)

How to choose carbon accounting software for real estate

Start with how the data gets in. Collecting utility data is most of the work. Etainabl says it collects data from every meter, supplier and source, Deepki lists 7,300+ automated connectors, and Measurabl syncs with the EPA’s ENERGY STAR Portfolio Manager for US buildings.

Match the platform to your frameworks. For UK portfolios, check SECR and ESOS: Etainabl says its reports are ready to feed SECR, ESOS and GRESB submissions. For European funds, look for SFDR, the EU Taxonomy and CRREM, which BuildingMinds automates. Scaler tracks EPC, BPS and NABERS per asset, which helps a manager with buildings in the US, Europe and Australia.

Ask who checks the numbers. Auditors will ask where each figure came from. EVORA SIERA runs four layers of data validation, including checks by its own data team. Atrius Sustainability offers an annual platform assurance document to file with a company’s 10-K.

In India, test BRSR before you sign. Large listed companies in India report under SEBI’s BRSR, and real estate investors often ask for GRESB as well. If you need both, ask any vendor to produce a BRSR report and a GRESB export from your own data during the trial.

Compare how each one charges. Measurabl has a free solution, Arc has a free tier with Arc Essentials at $70.83 per user per month billed annually, BuildingMinds charges from €19.90 per building per month, and IBM Envizi prices by data volume. A per-building price suits a small portfolio; a per-user price suits a large one with a small team.

When building your own makes sense

Buying is the right call for most owners reporting a standing portfolio to GRESB. Building your own starts to make sense when:

• Your data sits where no connector reaches. Building management systems, procurement records and contractor data on sites under construction rarely come through a standard integration.
• You report to frameworks in more than one country. GRESB for investors, BRSR at home and CRREM for European funds, all from one dataset, is where off-the-shelf tools leave spreadsheet work.
• Embodied carbon matters as much as operations. Developers need materials and construction emissions per project, not just utility bills per building.
• Carbon data is the product. If you sell emissions reporting to other owners, the platform is what you sell.

That’s the kind of system we build. For our client Accacia, a carbon accounting platform for real estate, we built the data ingestion and calculation engine that takes utility, BMS and procurement data in and puts Scope 1-3 emissions and GRESB and BRSR reports out. Our MVP development service can scope one with you, and our guide to fixed-price MVP development explains how we price it, including telling you plainly if one of the platforms above would do the job instead.

Frequently asked questions

What is carbon accounting software for real estate?

It is software that collects energy, water and waste data from meters, utility bills and building systems, converts it into Scope 1, 2 and 3 emissions, and produces reports for frameworks such as GRESB, SFDR and CSRD. Platforms like Measurabl, Deepki and Etainabl are built for property portfolios, while IBM Envizi and Atrius Sustainability also serve other kinds of sites.

Is there free carbon accounting software for real estate?

Yes. Measurabl offers a free solution that covers tracking, benchmarking and data sharing and syncs with ENERGY STAR Portfolio Manager. Arc from GBCI has a free tier for creating a project, adding data and scoring performance, with Arc Essentials at $70.83 per user per month billed annually. BuildingMinds starts at €19.90 per building per month on its Self-service plan.

Which real estate ESG software supports GRESB reporting?

Most of the platforms on this list name GRESB. Measurabl reports to GRESB and SFDR, Etainabl gives every asset its GRESB ID, Atrius Sustainability formats outputs for CDP, GRESB, SASB and TCFD, and BuildingMinds automates GRESB, SFDR, EU Taxonomy and CRREM reporting. Arc's Verified Performance Certificates earn GRESB points for energy ratings and operational building certification.

What should UK landlords look for in emissions software?

UK landlords usually need SECR and ESOS reporting alongside GRESB, plus tenant recharges from metered data. Etainabl says its reports are ready to feed SECR, ESOS and GRESB submissions and that go-live takes from a single day to about a month. EVORA SIERA pairs its platform with a team of 200+ experts for data the software cannot reach.

When should a real estate company build its own carbon accounting platform?

When the data or the reporting does not fit a standard platform: building systems and procurement feeds no vendor connects to, embodied carbon on projects under construction, or local frameworks such as India's BRSR that your investors ask for. A portfolio of standard offices reporting to GRESB is usually better off buying one of these tools.