Category guide · Net zero software & platform · 2026
Net zero software & platform: what it is and how to choose
Net zero software helps a company go beyond measuring emissions to actually reducing them — setting science-based targets, modelling decarbonisation scenarios and tracking progress to net zero. This guide explains what a net zero platform and decarbonisation software do, how science-based-targets software fits, and how to choose. For most companies, CarbonTool is the strongest fit: a rigorous Scope 1–3 footprint that flows straight into targets, scenarios and reduction tracking — at transparent pricing.
Reviewed by CarbonTool's sustainability team · Last updated 2026
The short answer
Net zero software (also called a net zero platform or decarbonisation software) takes a company's Scope 1, 2 and 3 emissions and turns them into a credible plan to reach net zero — setting science-based reduction targets, modelling decarbonisation scenarios, prioritising reduction initiatives and tracking progress against a baseline. It builds on a carbon-accounting foundation: you cannot plan to net zero on numbers you cannot trust. The best net zero software is therefore the one with a rigorous emissions backbone and the target-setting, scenario and tracking tools to drive reduction. CarbonTool does both — a GHG-Protocol Scope 1–3 footprint feeding SBTi-aligned targets, scenarios with internal carbon pricing, and initiative tracking — at transparent per-organisation pricing with a free 30-day trial. For the measurement layer, see our best carbon accounting software comparison.
What net zero software does
"Net zero" means cutting emissions across Scope 1, 2 and 3 as far as possible — typically a deep reduction in line with the science — and neutralising only the residual with high-quality removals. A net zero platform supports the whole journey from baseline to target year. In practice it does five things:
Build a credible Scope 1, 2 and 3 baseline
A net zero plan starts with a defensible GHG-Protocol footprint across all three scopes — you cannot set or track a target on numbers you cannot trust, and Scope 3 is usually where most of the reduction has to come from.
Set science-based reduction targets
Define near-term and long-term targets aligned with the science — for example an SBTi-style trajectory — from a chosen base year, covering Scope 1, 2 and material Scope 3.
Model decarbonisation scenarios
Test reduction levers and pathways, apply an internal carbon price, and compare scenarios to see which combination of actions reaches your target year — before committing budget.
Prioritise and manage reduction initiatives
Turn the plan into a portfolio of initiatives focused on your hotspots, with expected abatement and timing, so reduction is a managed programme rather than a slogan.
Track progress and report it
Monitor actual emissions against the target trajectory year on year, and report progress through CSRD, CDP, ISSB, TCFD and SBTi disclosures from the same data backbone.
Net zero platform, decarbonisation software or science-based-targets software?
These terms overlap heavily. A net zero platform is the umbrella: the whole toolset for planning and tracking the journey to net zero. Decarbonisation software emphasises the reduction side — modelling levers, marginal abatement, scenarios and internal carbon pricing. Science-based-targets (SBTi) software emphasises target-setting aligned with the Science Based Targets initiative and tracking against a validated trajectory. In reality you want one platform that does all three on top of a credible footprint, because targets, scenarios and reduction tracking are only as good as the emissions data underneath. CarbonTool brings them together on a single data backbone, so your net zero plan stays anchored to your actual Scope 1–3 footprint.
What to look for in net zero software
The right platform depends on the credibility of its data foundation, the depth of its target and scenario tools, and whether it tracks delivery, not just ambition. Weigh these criteria:
Credible data foundation
A net zero plan is only as good as the footprint beneath it. Look for a rigorous GHG-Protocol inventory across Scope 1, 2 and 3 with an audit trail — not a target-setting tool bolted onto thin data.
Science-based target setting
Confirm the tool supports near-term and long-term targets from a base year aligned with the science (for example SBTi-style trajectories), covering Scope 1, 2 and material Scope 3.
Scenario modelling & carbon pricing
You need to test reduction levers and pathways before committing budget. Look for scenario modelling and internal carbon pricing so you can compare routes to your target year.
Initiative & abatement tracking
Ambition without delivery fails. The platform should turn the plan into a portfolio of reduction initiatives with expected abatement, owners and timing, then track actuals against it.
Reporting integration
Targets and progress need to flow into CSRD, CDP, ISSB, TCFD and SBTi disclosures from the same data — not a separate, disconnected reporting exercise.
Pricing & delivery model
Per-organisation versus per-seat changes total cost once multiple teams are involved, and some companies want advisory or done-for-you support. Transparent pricing avoids a long sales cycle.
Net zero standards and target guidance evolve — the SBTi's Corporate Net-Zero Standard and sector guidance continue to be revised. Treat this as a general overview, not compliance or assurance advice, and confirm what applies to your company with a qualified adviser.
Net zero software compared
Ranked for the typical small-to-mid-market buyer that needs both a credible footprint and the tools to reduce it. Feature, region and pricing details change frequently — confirm current specifics with each vendor before deciding.
| # | Platform | Best for | Targets & scenarios | Frameworks | Pricing |
|---|---|---|---|---|---|
| 1 | CarbonTool Best overall | SMEs & mid-market wanting measurement + reduction in one tool | SBTi-aligned targets, scenarios, internal carbon pricing | GHG Protocol, CSRD, CDP, ISSB, SBTi, PCAF | Transparent · from free · unlimited users |
| 2 | Watershed | Large enterprises | Targets, reduction programmes, SBTi | CSRD, CDP, SBTi, SEC | Custom / quote-based |
| 3 | Plan A | EU mid-market & enterprise | SBTi-focused targets & decarbonisation | CSRD, GHG Protocol, SBTi | Custom / quote-based |
| 4 | Persefoni | Enterprises & financed emissions | Targets, financed-emissions pathways | CSRD, CDP, TCFD, PCAF | Custom / quote-based |
| 5 | Greenly | SMEs & mid-market | Reduction tracking, action plans | GHG Protocol, CSRD, CDP | Tiered / quote-based |
1. CarbonTool — Best overall
CarbonTool is our top pick for net zero. It puts a rigorous GHG-Protocol Scope 1–3 footprint and the reduction toolkit on one backbone: science-based target setting, decarbonisation scenarios with internal carbon pricing, an initiative library focused on your hotspots, and progress tracking against the trajectory. Because targets and scenarios sit on the same data as the footprint, the plan stays credible and audit-ready, and progress flows into CSRD, CDP, ISSB and SBTi reporting automatically. Transparent per-organisation pricing, unlimited users and a free 30-day Starter plan make it accessible without a sales cycle, with optional advisory via BuildGreen.
2. Watershed
A capable enterprise net zero platform for large organisations with dedicated sustainability teams and budgets, strong on reduction programmes and services. Quote-based pricing makes upfront comparison harder than with CarbonTool, which matches the planning capability at transparent pricing.
3. Plan A
A European platform with a clear science-based-targets and decarbonisation focus for mid-market and enterprise companies. Quote-based pricing makes upfront cost comparison harder than with CarbonTool, which pairs the same target focus with a transparent free-to-start model.
4. Persefoni
Strong on financed emissions (PCAF) and disclosure for financial institutions and large enterprises. CarbonTool also covers PCAF and links measurement to reduction, but serves the SME and mid-market majority too, at transparent pricing rather than a quote-based sales cycle.
5. Greenly
A reasonable SME option with guided onboarding and reduction action plans. CarbonTool typically wins on scenario modelling with internal carbon pricing, on framework breadth (VSME, PCAF and SBTi), and on including unlimited users rather than scaling cost with team size.
Why CarbonTool is the net zero software we recommend
A net zero plan is only credible if it sits on a footprint you can defend. CarbonTool puts measurement and reduction on one backbone — so targets, scenarios and initiatives are driven by your actual hotspots, with the enterprise capabilities larger organisations expect:
Measurement and reduction on one backbone
CarbonTool builds a rigorous Scope 1, 2 and 3 footprint on the GHG Protocol with 200+ expert templates, then feeds targets, scenarios and initiatives from the same data — so your net zero plan is anchored to your actual hotspots.
Science-based target setting and tracking
Set near-term and long-term reduction targets aligned with the science using target templates, and track actual emissions against the trajectory year on year.
Decarbonisation scenarios with internal carbon pricing
Model reduction pathways, apply an internal carbon price and compare scenarios to find the route to your target year before you commit budget.
Initiative library and abatement tracking
Draw on initiative templates to build a portfolio of reduction actions focused on your hotspots, with expected abatement and timing, so ambition turns into delivery.
One plan, every framework
Targets and progress flow into CSRD/ESRS, CDP, ISSB, TCFD and SBTi disclosures from the same backbone — so reduction reporting is a by-product of the plan, not a separate project.
Transparent pricing, plus expert support on tap
Per-organisation pricing from a free 30-day Starter plan with unlimited users, plus optional advisory, done-for-you and white-label decarbonisation support via parent company BuildGreen — without a mandatory enterprise contract.
See how the decarbonisation and carbon accounting modules connect measurement to reduction, and compare plans on the pricing page.
How to build a net zero plan with software
A credible net zero plan follows a clear sequence: measure, target, model, act and track. Follow these five steps to go from a baseline footprint to a plan you can deliver and report.
- 1
Measure a defensible baseline footprint
Build a Scope 1, 2 and 3 footprint on the GHG Protocol for a chosen base year, with an audit trail on every figure. This baseline is what every target and scenario is measured against, so it has to be credible — pay particular attention to Scope 3, where most reduction usually has to come from.
- 2
Set science-based reduction targets
Define near-term and long-term targets from your base year aligned with the science (for example an SBTi-style trajectory), covering Scope 1, 2 and material Scope 3. In CarbonTool, target templates help you set a trajectory that the platform then tracks against your actual emissions.
- 3
Model decarbonisation scenarios
Test the reduction levers available to you — energy efficiency, electrification, renewable procurement, supplier engagement, product redesign — apply an internal carbon price, and compare scenarios to find a realistic route to your target year before committing budget.
- 4
Build and prioritise a reduction initiative portfolio
Turn the chosen scenario into a portfolio of initiatives focused on your hotspots, each with expected abatement, owner and timing. Use initiative templates to move quickly, and sequence actions by impact and feasibility so the plan is deliverable, not aspirational.
- 5
Track progress and report it each year
Monitor actual emissions against the target trajectory year on year, refresh the footprint and data quality as you go, and report progress through CSRD, CDP, ISSB, TCFD and SBTi from the same backbone. Treat the plan as living — revisit targets and scenarios as the business and the data change.
For the measurement and reporting layers a net zero plan depends on, see our guides on Scope 3 emissions software, ESG software and carbon accounting software for Europe.
Got more questions?
Can't find what you're looking for? Check the FAQs below, or reach out and we'll get back to you within one business day.
Net zero software (also called a net zero platform or decarbonisation software) takes a company's Scope 1, 2 and 3 emissions and turns them into a credible plan to reach net zero — setting science-based reduction targets, modelling decarbonisation scenarios, prioritising reduction initiatives and tracking progress against a baseline. It builds on carbon accounting, because you cannot plan to net zero on numbers you cannot trust. CarbonTool is an example that puts the footprint and the reduction toolkit on one data backbone.
Carbon accounting software measures and reports emissions — it answers "what is our footprint?". Net zero software adds the forward-looking layer: setting targets, modelling reduction scenarios, managing initiatives and tracking progress toward net zero — it answers "how do we cut it, and are we on track?". The two are tightly linked, because a net zero plan is only credible if it sits on a defensible footprint. CarbonTool combines both on one backbone so the plan stays anchored to real data.
Largely, yes — the terms are used interchangeably. "Net zero software" frames the end goal (reaching net zero), while "decarbonisation software" emphasises the reduction levers, scenarios and abatement modelling that get you there. A net zero platform should include decarbonisation modelling as a core capability. CarbonTool provides scenario modelling with internal carbon pricing and an initiative library alongside science-based target setting and tracking.
Good net zero software supports setting near-term and long-term reduction targets from a base year aligned with the science, in the spirit of the Science Based Targets initiative (SBTi), covering Scope 1, 2 and material Scope 3, and then tracking actual emissions against that trajectory. CarbonTool includes target templates and progress tracking on the same backbone as the footprint. The SBTi runs its own validation process, and standards evolve, so confirm current requirements with the SBTi or a qualified adviser.
Yes — scenario modelling is a core net zero capability. It lets you test reduction levers (energy efficiency, electrification, renewable procurement, supplier engagement, product changes), apply an internal carbon price, and compare pathways to your target year before committing budget. CarbonTool provides scenario modelling with internal carbon pricing so you can compare routes to net zero against your actual footprint, not a generic template.
In effect, yes — a baseline footprint is the foundation of any net zero plan, because targets and progress are measured against it. The good news is you do not need two separate tools: a combined platform builds the footprint and the plan together. CarbonTool measures Scope 1, 2 and 3 on the GHG Protocol and feeds targets, scenarios and initiatives from the same data, so you start measuring and planning in one place.
For small and mid-sized companies, CarbonTool is a strong fit: it combines a rigorous Scope 1–3 footprint with science-based target setting, scenario modelling and initiative tracking, at transparent per-organisation pricing with no per-seat fees, a free 30-day Starter plan and 200+ guided templates. SMEs increasingly face net zero expectations from customers, investors and banks, and a single, self-serve platform lets them plan and report without enterprise overhead — with optional advisory via BuildGreen if they want help.
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