The Best AI Carbon Accounting Software for...

The hardest number in a freight operator's climate disclosure is not the diesel. Diesel is 2.7 kg CO2-e per litre under the NGA Factors 2025 workbook, the litres sit on a monthly card statement, and the calculation is one line.

The hard number is the haul you did not drive.

Subcontracted linehaul. Owner-drivers billing by the run. A rail leg across the Nullarbor. Coastal shipping on the Bass Strait run. Airfreight uplift bought through a forwarder who buys it from someone else. That is where a freight operator's reported emissions actually live, it is Scope 3 on your ledger and Category 4 on your customer's, and it is where restatements come from.

Group 2 mandatory climate reporting under AASB S2 starts for financial years from 1 July 2026, which pulls in a wide swathe of Australian logistics operators. Group 3 catches most of the rest from 1 July 2027. Meanwhile enterprise tenders now ask for a per-tonne-km number on the invoice, and Safeguard Mechanism baseline decline is squeezing the top of the sector. Four reporting demands, one data set.

This post walks the honest set of software options for that shape of business. It is a comparison, not a hit piece. Where we sell one of them (Carbonly), we say so plainly, and we are equally plain about what we do not do.

Where freight Scope 3 actually breaks

Every vendor demo starts with a fuel docket, because a fuel docket is the trivial case. One fuel, one unit, one factor, unambiguously Scope 1. Any OCR tool in the category reads one. A fleet-heavy operation produces them by the crate, so the volume is real, but volume is not the difficulty. These five things are.

Movement ambiguity. A consignment note says "Melbourne to Perth, 18 pallets, 4.2 tonnes". It does not say road to the rail head, rail across, road on the last leg. It does not say whether the trailer ran loaded on the backload. Each mode carries a different NGA factor and a different denominator, and a tool that treats every kilometre as "freight" cannot rebuild the split after the fact.

Unit chaos. Freight bills in chargeable weight, which is a commercial construct, not a mass. Parcel and air freight bill on dimensional weight. Sea freight bills on TEU. Your customers want tonne-km. Your factors are expressed per tonne-km or per litre. LNG arrives in gigajoules, diesel in litres, the electric metro vans in kilowatt-hours. Converting a billing unit into an activity unit, correctly and the same way every quarter, is the single most common cause of a freight restatement we would expect an assurer to find.

Double counting. A 4PL subcontracts to a 3PL, which subcontracts to an owner-driver. The same 900 kilometres can appear on three ledgers as three different scopes. Add a shared depot held in a joint venture, where one partner consolidates on operational control and the other on equity share, and one tonne of CO2-e gets counted twice inside the same corporate family. That is a reporting error, not a boundary quirk.

Spend-based estimation erases the thing you are trying to prove. Map freight spend to an environmentally extended input-output factor and a lane shifted from articulated road haul to rail at the same freight rate shows no improvement at all. Rail freight carries a materially lower intensity per tonne-km than road in the NGA workbook. Spend-based methods cannot see that, which means the one decarbonisation lever a freight operator genuinely controls is invisible in its own report.

Carriers send evidence, not data. A subcontract carrier's annual emissions statement arrives as a PDF with three charts in it. Refrigerant service dockets arrive as scanned carbon copies from a mobile fitter. Owner-driver fuel comes in as expense claims with a phone photo attached. None of that is a data feed. All of it is evidence an assurer will want to see.

Assurance traceability. Under ASSA 5010 the assurance provider samples one number, often a Scope 3 line, and asks where it came from. In freight that question is "which of your subcontractors, in which month, on what evidence". If the answer involves a tab in someone's workbook, you have a problem that software should have solved a year earlier.

The freight-specific things a platform still has to get right

Scope 3 is the hard part, but three operational details will sink a platform on a freight footprint regardless.

Fuel card reconciliation at owner-driver scale is the first. Physical litres are split across monthly statements from multiple card issuers for the company trucks, reimbursement claims for the owner-drivers, and truck-stop dockets photographed at 4am. The same fill often appears twice, once on the card statement and once as a docket, which is a duplicate that inflates your Scope 1 if nothing catches it.

Cold-chain refrigerant is the second. R-404A carries a GWP of 3,943 under AR5, the set NGER applies through regulation 2.02 of the NGER Regulations. Industry-recognised leak rates on refrigerated trailers sit around 15 per cent of charge per year, which puts a multi-tonne CO2-e number per trailer per year in a blind spot if a top-up docket is not treated as a Scope 1 event in its own right.

Threshold arithmetic is the third. A freight operator crosses the NGER 25 kilotonne facility threshold on diesel alone at roughly 9 to 10 million litres a year, and the 50 kilotonne corporate threshold at around 18 to 19 million. Crossing it lands you in NGER Measurement Determination territory and, through the registration pathway, into AASB S2 Group 2.

The five options honestly worth evaluating

This is not a quality ranking. We are the vendor of one of these products, and the basis here is Australian regulatory fit under NGER and AASB S2, whether a subcontracted movement can be traced back to evidence, and per-project cost. A freight operator that weights those three differently, or that is already contracted globally, will end up with a different order. Descriptions of the other vendors summarise their own public material as at September 2026. We have not run their platforms, so treat this as a starting point for your diligence, not a verified assessment.

1. Carbonly

Australian-built. The question we designed the freight path around is not "how many litres" but "whose litres, on whose movement".

Every emission record carries the operator and the project it belongs to, and the 15 Scope 3 subcategories are tracked separately rather than rolled into a single Scope 3 total. That is what lets the same Melbourne to Perth movement sit as Scope 1 diesel on the carrier that drove it, Category 4 upstream transport on the shipper's ledger, and Category 9 downstream on the retailer's, without any of the three netting it away. For shared depots and interline arrangements, JV consolidation runs under operational, financial and equity-share methods so you can see the same asset three ways and pick one deliberately.

On the fuel side, monthly card statements, owner-driver expense claims and phone photos of truck-stop dockets all land through the same path: per-project email ingestion, or a OneDrive or SharePoint folder synced per depot. The document engine reads layout and context rather than matching a fixed per-issuer template, so a card provider changing its statement design mid-quarter does not stop ingestion. Five-tier material matching is what resolves "DSL", "ULSD", "diesel exhaust fluid" and "AdBlue" into the right factor rather than the nearest-looking one.

Refrigerant is a first-class record type, not a note in a comment field. A top-up docket for a reefer trailer becomes a Scope 1 event with the AR5 GWP applied, held against that trailer so the annual charge loss history is visible instead of reconstructed at year end.

The data quality layer is deliberately boring, and we think that is the right call for something an assurer has to accept. It is rules and statistics, not a model forming an opinion: threshold breaches, z-score outliers against a rolling baseline, trend drift against that baseline, missing-period detection for the depot that quietly stopped submitting, duplicate detection for the fill that appears on both the card statement and the docket, and emission factor drift where a record's factor no longer matches the pinned NGA edition for that reporting year. Every one of those is a rule you can explain out loud in an assurance meeting.

Underneath it sits NGA Factors 2025 with factor version pinning, so prior periods stay locked to the edition that was current when the emissions were recorded, and per-site Scope 2 selection for warehouse networks spread across state grids. Carbonly calculates and stores on the AR5 values NGER applies. Every emission record links to its source document, and the Auditor Workspace exports an Evidence Pack for an ASSA 5010 engagement.

Freight-specific extras that matter in practice: calculation rules that turn odometer or telematics exports into per-vehicle emissions, and custom formulas for the tonne-km figure a customer wants on an invoice. Depot and fleet managers can also connect ChatGPT or Claude to the workspace and ask which trailers had refrigerant top-ups over two kilograms this quarter, with the answer read live from the ledger.

Where it fits. Mid-tier road freight, 3PL and 4PL operators, cold-chain fleets, linehaul carriers, last-mile networks and multi-modal forwarders, from about 20 vehicles to several thousand. Strongest where subcontracted haul, fuel evidence and refrigerant records are the dominant inputs.

Honest gaps. We do not have out-of-the-box API connectors to the major telematics vendors, so telematics arrives as scheduled exports rather than a live feed. We do not have a direct submission path into Climate Active, and no accreditation against the GLEC Framework: we calculate on NGA factors and can express the result per tonne-km, but that is our method, not a third-party certification. No PCAF financed-emissions engine, no CBAM module, no CSRD or ESRS template, no NABERS or GRESB generator. For those we hold the underlying data and the submission is a reporting view assembled on top.

Pricing. Per project, with a workspace minimum of $100 per month. Email hello@carbonly.ai for a number against your depot and vehicle count.

2. NetNada

Australian-built, with integrations into Xero, MYOB and QuickBooks Online. Public marketing positions the platform around SME sustainability reporting driven from the accounting system, where transactions are categorised and factored as they land. The company's public materials state backing from Skalata Ventures and participation in the UNSW Founders program.

Where it fits. Smaller courier and metro delivery operators whose cost base is coded consistently and whose fleet is small enough that fuel is genuinely a general ledger problem.

The freight consideration. A general ledger line for a subcontracted linehaul says a dollar amount and a carrier name. It does not say tonnes, kilometres or mode, which are the three things a tonne-km disclosure needs. That is not a knock on the vendor, it is the structural limit of starting at the transaction: dollars are what the accounting system knows. Under AASB S2 a spend-based Scope 3 number is defensible in year one with the method disclosed, and assurance providers push toward physical activity data after that. Ask directly how the platform gets litres out of a card statement and tonne-km out of a consignment note without a person retyping them.

3. Greener

Australian-built. Greener's public marketing as at September 2026 positions the platform around retail and consumer-facing businesses managing many small sites, with a focus on supplier engagement and making the output communicable.

Where it fits. Contract logistics operators whose emissions are dominated by large distribution centres run for retail customers rather than by vehicles. If your Scope 2 across a DC network is bigger than your diesel, this is a genuinely different and legitimate shape of problem, and a platform built around fixed sites and supplier data suits it.

The freight consideration. If the profile inverts and diesel across a mobile fleet is the material line, the design centre moves away from you. Ask specifically about owner-driver fuel evidence, duplicate detection across card statements and dockets, and whether reefer refrigerant is a tracked record type.

4. Watershed, Persefoni and Salesforce Net Zero Cloud

The international enterprise tier. Watershed is US-headquartered according to public reporting, with public marketing around large corporate footprints and clean power procurement. Persefoni positions around climate management and accounting with SEC and CSRD-shaped disclosures. Salesforce Net Zero Cloud sits inside the wider Salesforce platform and is often chosen where Salesforce is already the system of record.

Where they fit. Multinational freight and 3PL groups where a US or European parent already has an obligation running alongside the Australian AASB S2 disclosure. If the parent has picked the platform, the Australian entity is usually configuring, not selecting, and the real question becomes how to make NGER work inside it.

Honest note. Their published material centres on TCFD, SEC and CSRD rather than the NGER Measurement Determination. As at September 2026 we could not find public documentation from any of the three covering NGA factor pinning by edition, Safeguard baseline tracking, or Measurement Determination Chapter alignment as native features rather than configuration. That is a statement about published material, not about what the products can be configured to do, so put the question to each vendor. On price, none publishes a public price list. Publicly reported figures suggest roughly AUD 37,000 to AUD 264,000 per year for Watershed and AUD 48,000 to AUD 210,000 for Salesforce Net Zero Cloud; confirm with the vendor, because quotes move a long way with scope.

5. The bespoke consultant model

Still the most common answer in mid-tier Australian freight, and worth naming honestly. A sustainability consultant builds a model, populates it from statements and service records the client emails across, and hands back a report at the end of the reporting year.

Consultants are not the competition here. A boutique practice is frequently the buyer of a platform like this one, because the platform is the workshop equipment that lets the practice carry ten freight clients instead of two without hiring another analyst. The consultant stays the craftsperson on materiality, scenario analysis and the board conversation.

Where it fits. A single-year engagement where the goal is one disclosure, or the very beginning, when the job is working out where the emissions are before committing to a platform.

Where it stops. Assurance. The Clean Energy Regulator published a notice on 9 July 2025 recording that it had accepted an enforceable undertaking from Beach Energy after inadvertent misstatements in prior-period NGER reports, and the remediation it required was structural: documented controls, strengthened data collection systems, and reasonable assurance audits before submission for three reporting periods. The published lesson is about control systems rather than individuals, and a hand-built model carries hidden formulas and single-person knowledge risk that no amount of care removes.

The questions to ask any vendor before you sign

The demo is where the vendor shows you their best invoice. These are the questions that separate platforms on a freight footprint.

On subcontracted haul. "Here is a consignment note and a subcontractor invoice for a Melbourne to Perth movement. Show me the emission record, the mode split, the method you used, and where the evidence sits." If the answer is a spend factor, you know your year-two problem already.

On double counting. "We are a 3PL with a shared depot in a joint venture. Show me the same movement as our Scope 1, our customer's Category 4, and the JV partner's equity-share view, and prove it is not counted twice inside our own group."

On duplicates. "This fill appears on the BP statement and again as a photographed docket. What happens?" Silence here means inflated Scope 1.

On refrigerant. "Here is a service docket with a 3.2 kilogram R-404A top-up on a reefer. Show me the Scope 1 record, the AR5 GWP applied, and the trailer's charge history."

On assurance walkability. "Pick a random Scope 3 record and walk me back to the source document and the factor version used." Two clicks is good. More than three is a problem with the assurer sitting beside you.

A practical starting point

Pick your messiest lane, not your tidiest depot. Run one quarter through a single platform trial: the subcontractor invoices and consignment notes for that lane, the fuel statements from every card issuer that touches it, a stack of owner-driver claims, reefer service dockets if you run cold chain, and the tonne-km report your largest customer already asks for.

Then bring in whoever will provide your ASSA 5010 assurance and ask one question: which platform's audit trail is easier to walk. That answer usually settles it.

Frequently asked questions

When does AASB S2 apply to logistics and freight operators? Group 2 reporters, broadly entities meeting two of three thresholds on consolidated revenue, gross assets or employee count, report for financial years from 1 July 2026. Group 3 picks up the rest from 1 July 2027. An operator already registered under NGER as a corporate group is pulled into Group 2 through the registration pathway.

How do we handle owner-driver and subcontractor emissions? They sit in Scope 3, Category 4 or Category 9 depending on which side of the movement you are on. Physical activity data, meaning litres or tonne-km, is the strong answer. Distance-based estimation against NGA factors is the acceptable fallback. What matters most to an assurer is a documented method applied consistently across periods, and evidence retained for the movements you sampled from.

Do NGER and AASB S2 use the same global warming potentials? No. NGER applies AR5 values set in regulation 2.02 of the NGER Regulations, with a single methane value of 28. AASB S2 is written to AR6. AASB S2025-1, issued December 2025, provides jurisdictional relief so NGER reporters can use the AR5 values in the AASB S2 disclosure for NGER-covered portions without recalculating. Carbonly calculates and stores on AR5; restating a non-NGER portion to AR6 is a reporting step handled on top of the ledger, not inside it.

What is the NGER threshold for a freight fleet? The corporate group threshold is 50 kilotonnes CO2-e a year, reached at roughly 18 to 19 million litres of diesel. The single-facility threshold is 25 kilotonnes, at around 9 to 10 million litres. Energy thresholds of 200 TJ and 100 TJ can bite first for operators with large warehousing loads.

What does a Carbonly deployment for a freight operator cost? Per project, with a $100 per month workspace minimum. For a quote against your vehicle count, depots and the Scope 3 categories you need tracked, email hello@carbonly.ai.

The Best AI Carbon Accounting Software for Australian Logistics and Freight Companies (2026)