The leading GHG Accounting Platform for Reporting and Scope 3
Sumday's GHG accounting platform is built for organisations that need numbers they can stand behind - for reporting, compliance and better decision making.
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Hear from our customers
We're proud to work with organisations who are taking tangible steps to drive better outcomes for people and the planet.
Australian Unity
Australian Unity uses Sumday to report on emissions to an audit ready standard. Ashley was looking for a true partner.
Optus
Discover how Optus is leading the way in supply chain engagement with Sumday.
Cirka
With a Science Based Target and a supplier engagement program with Sumday, Cirka is taking real action.
Pinnacle
Pinnacle Investment Management Group shares how Sumday helped them scale ESG reporting across 18 investment affiliates.
What leaders say about Sumday
~80% response rates
Scope 3 Supplier Engagement
“The Sumday team has a lot of deep accounting expertise that helps us to really engage clients, customers and suppliers. The response rate this time has been very high, around 80% engagement. But more importantly, we've been able to understand what our suppliers are doing in terms of reducing emissions. I think everyone in corporate Australia has a role to play in supporting small and medium companies as part of the decarbonisation journey.”
Juan Pablo Alvarez Gaitan
Associate Director, Environment
Right fit
Platform Choice
“The level of work we're doing around it wouldn't be possible without some level of automation. Of all the platforms we looked at, we think Sumday was absolutely the right choice for us.”
Ashley Bleeker
Group Strategy & Impact Environmental Lead, Australian Unity
Audit-ready
GHG Inventory
“Before using Sumday, we had a lot of spreadsheets and data everywhere. It was a challenge for us to map our inventory and get our operational boundary right. The barriers to entry into the GHG inventory were really around how do we capture that data, how do we know it can be audited and validated and what were we going to do to engage our supply chain. We know now that Sumday is the provider that we needed.”
Daniel Rowe
Executive General Manager, ESG, Cirka
Real Support
For this work to drive decisions, sustainability needs to become the native language of finance. We remove the translation tax. We've got your back.
The tools you need for an efficient, repeatable process
Built by accountants to save time and improve data quality. For organisations that want to understand the impact of their decisions.
A carbon ledger for audit ready accounting
Have confidence that your footprint can be traced back to your financials. Transactions are automatically coded to an emissions source to give you a head start.
Leverage AI for faster data mapping
Spend less time classifying transactions and activity data. Sumday's AI suggests emissions sources with confidence scores and remembers how you coded similar data last time.
Generate the documentation and reports you need
Draft reports and disclosures in minutes, generate board reports, climate disclosure drafts and regulatory submissions with AI that already understands AASB S2, ISSB, CSRD, TCFD, and NGER.
Every database ready to go and updated for you
Forget the spreadsheets. Select from pre-loaded emission factor databases, search all EFs in one table and import your own custom sets.
Report in a way the rest of the organisation understands
Break down emissions by department, project, site, or any category that makes sense to your team. Give managers numbers they can be accountable for.
Support from AI agents trained on GHG accounting
Ask questions, get accounting-grade answers, whether classifying a new activity, choosing an emission factor, or preparing for audit, get answers grounded in GHG Protocol methodology.
Run your supply chain engagement program with Sumday
You can't reduce Scope 3 emissions without reliable data from your suppliers. Sumday runs that whole program for you, the outreach, the tools, the support.
Not all suppliers are the same. We segment your supply chain into large disclosing suppliers, strategic suppliers, and SMBs you can support, so the programme works. We even find the right contacts.
Support SMBs
Thanks to Xero, Sumday is free for over 4 million SMBs. Your suppliers get the help and tools they need.
Sumday is now.
Sustainability Accounting the Organisation Trusts
Sustainability becomes part of better decision making when its robust, trusted and transparent. Let's work together to make it happen.