- A carbon accounting software centralizes data, applies emission factors and covers scopes 1, 2 and 3.
- Beyond the calculation, look at scope 3 coverage, supplier collection, factor traceability and reuse toward EcoVadis, CDP and CSRD.
- A software gives the tool, not the method: support helps settle the decisions of a first footprint.
- A spreadsheet is enough for a simple first footprint; the platform takes over when the process repeats and grows more complex.
What is a carbon accounting software?
It is a tool that structures and automates the calculation of a carbon footprint. Where a spreadsheet leaves you to do everything by hand, a platform centralizes your activity data into a single source, applies emission factors, splits emissions by scope, and keeps a record of the calculations so you can reproduce them from one year to the next. The calculation principle stays the same as for a manual footprint, detailed in our article on how to calculate your carbon footprint; the software saves time and makes the process more reliable.
This reliability point matters more than it seems. An Excel file shared between several people is fragile: one wrong click breaks a formula or overwrites a data point, and the result is distorted without anyone noticing. A platform protects the calculations, tracks who changed what, and prevents an entire footprint from resting on a file that anyone can damage.
Which features are must-haves?
Every platform advertises emissions calculation. The difference plays out on what surrounds it. The functions that really matter:
- a single source for your emissions data, your supporting documents and your policies, shared across your teams;
- official emission factors built in and kept up to date, starting with the ADEME Base Empreinte, without limiting yourself to it for the categories that require finer data, with traceability of the versions used;
- full coverage of scopes 1, 2 and 3, and not only the easy categories;
- the organization and running of data collection campaigns with suppliers for scope 3, adapted to each one's maturity;
- the move from footprint to action: reduction plan, pathway, transition plan tracked over time;
- the reuse of data toward your other obligations: EcoVadis, CDP, CSRD, without re-entering everything;
- history and multi-year tracking, to compare reporting years on a consistent basis.
A platform that ticks the first line but not the others will leave you alone on what is difficult.
Software alone or software with support?
This is the real watershed. A software gives you a tool; it does not give you the method. And a first footprint rarely stumbles on the calculation, but on the decisions: which boundary, which limits, how to handle a category with no data, which scope 3 category to prioritize. A tool alone leaves you to settle these questions without a safety net.
This is Ditto's stance: a platform and an expert who steers it with you. A dedicated coach teaches you the method as you go, so you can run it yourself in the next cycle rather than depend on a provider for every reporting year. Ditto is not only a carbon tool: the same data serves your EcoVadis assessments, your CDP responses and your CSRD reporting. This reuse is not an empty claim: Ditto practices these frameworks day to day, as an EcoVadis training partner since 2023, rated EcoVadis Platinum on its own assessment, and a CDP Accredited Solutions Provider. Carbon support therefore rests on real expertise in the frameworks where your footprint will then be put to use.
How do you cover scope 3 and suppliers?
This is the decisive test of a platform, because scope 3 most often represents the largest part of the footprint. According to a report by Boston Consulting Group and CDP published in June 2024, supply chain emissions are on average 26 times higher than direct emissions. A good platform must therefore let you start with a monetary approach to map quickly, then refine with physical data, and above all organize and run data collection campaigns with your priority suppliers.
The subtlety is there: each request must be calibrated to the supplier's maturity. You do not ask the same thing of a very small business just starting out, whose task you make as easy as possible, as of a large mid-market company, which often already holds established, reliable carbon data that you can take as is. A uniform campaign discourages the small players and under-uses the large ones. A tool that stops at scopes 1 and 2 simply misses the essential.
Software or spreadsheet: what is the difference?
A spreadsheet is enough for a simple first footprint, on a small boundary: with Base Empreinte factors and a clear method, you take a first measurement without buying anything. The limit appears quickly: on scope 3, multi-year tracking, collaboration between departments, source traceability and reuse toward EcoVadis or CDP. Beyond a certain volume, the spreadsheet becomes fragile and time-consuming, and the risk of error rises. The software takes over when the process repeats and grows more complex.
How to choose: the questions to ask
Before signing, ask the vendor these questions:
- Are the emission factors official, built in and updated, and can I trace the version used?
- How far does the tool cover scope 3, and how does it collect supplier data?
- Do I get human support, or only a self-service software?
- Can I reuse my data for EcoVadis, CDP and CSRD without double entry?
- Does the platform track my action plan and my pathway over time, not only the footprint?
- Will I be able to run it myself after one cycle, or dependent at every reporting year?
Cost obviously comes into play; we detail it in our article on the cost of a carbon footprint. According to ADEME's business ecological transition service, a footprint produced through a platform with tracking tools costs €2,000 to €5,000 for an SME, against around €10,000 for a full footprint supported by a consulting firm. Watch the meaning of the word "platform" in that figure: it refers to a tool with minimal support. A solution that combines platform and expert, like Ditto, sits between the two, more complete than a self-service software, more accessible than a consulting firm.
If you are a small organization, the question of the first tool arises differently. We address it in our article on the SME carbon footprint.
Steer your carbon with Ditto
Ditto brings together what matters in one place: a single source for your emissions data, Base Empreinte factors built in, coverage of scopes 1, 2 and 3, supplier collection, and the move from footprint to transition plan tracked year after year. The same data feeds your EcoVadis ratings, your CDP responses and your CSRD reporting. And a dedicated coach teaches you the method, so the platform lets you run it yourself rather than stay dependent. If you are just starting out, a platform like Ditto saves time, but a clear method and a well-defined boundary already give you plenty to build on.
See what a carbon platform can change
A Ditto expert shows you how to centralize your data, cover your scope 3 and reuse your footprint across all your frameworks.
Carbon accounting software: key takeaways
| Criterion | What to look at |
|---|---|
| Data | Single source, official factors built in and traced |
| Scopes | Full coverage of 1, 2 and 3, not only the easy categories |
| Suppliers | Structured scope 3 collection, monetary then physical |
| Support | Software + coach, to become able to run it yourself |
| Reuse | Export to EcoVadis, CDP, CSRD without double entry |
| Duration | History and multi-year tracking on a consistent basis |
Frequently asked questions
Which carbon accounting software should you choose?
The one that covers the whole process, not only the calculation: a single data source, official factors traced, full scope 3 coverage and supplier collection, action plan tracking, reuse toward EcoVadis, CDP and CSRD, and human support. The best tool is the one you will manage to keep up to date from one year to the next.
Is a spreadsheet enough for a carbon footprint?
For a simple first footprint on a small boundary, yes, with Base Empreinte factors and a clear method, ideally after training, even a short one: it avoids the boundary and factor errors that distort a footprint from the start. Beyond that, the spreadsheet shows its limits on scope 3, multi-year tracking, traceability and data reuse. A platform then takes over.
Do you need software or support?
Both beat either one alone. A software gives the tool, not the method. Support helps you settle the decisions of a first footprint (boundary, categories with no data, scope 3 priorities) and become able to run it yourself. A solution that combines platform and coach covers both needs.
How does a software cover scope 3?
By letting you start with a monetary approach to map all categories, then refine the heaviest ones with physical data, and above all organize data collection with your priority suppliers. This is the point that sets a true carbon platform apart from a simple scopes 1 and 2 calculator.
