GITNUXSOFTWARE REVIEW
Sustainability In IndustryTop 10 Best Greentech Software of 2026
Top 10 ranking of greentech software tools with side-by-side criteria, strengths, and tradeoffs for decision-makers reviewing Plan A, Watershed, and Sphera.
How we ranked these tools
Vendors set the topic, but our editors set the inclusion criteria and the evaluation framework before research starts.
AI search agents find sources, extract figures with provenance, and aggregate written reviews. They also transcribe video reviews and podcasts.
Framework: Features 40% · Ease 30% · Value 30%
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Plan A is the best choice for sustainability teams running controlled, repeatable emissions calculations across entities because it links factor and assumption decisions to each rollup result for audit-ready traceability, while Greenly is a solid alternative for SMBs that want spend and activity intake tied to consistent recalculation and a clear calculation trail.
Editor’s top 3 picks
Three quick recommendations before you dive into the full comparison below — each one leads on a different dimension.
Plan A
Calculation workflows that keep factor and assumption choices linked to each rollup result for inventory audits.
Best for: Fits when sustainability teams need controlled emissions calculations across entities and repeated reporting cycles.
Watershed
Editor pickConfigurable emissions calculation workflows tied to business inputs with traceable change history for auditability.
Best for: Fits when sustainability teams need repeatable organizational emissions calculations with traceable inputs and automation.
Sphera
Editor pickGoverned emissions calculation workflows that preserve factor and activity traceability through reporting preparation.
Best for: Fits when sustainability teams need governed, repeatable emissions calculations feeding CSRD reporting.
Comparison Table
Plan A
enterpriseSustainability software for carbon accounting, decarbonization planning, and reporting.
Calculation workflows that keep factor and assumption choices linked to each rollup result for inventory audits.
Plan A is built around an emissions calculation workflow where activity data rolls up into inventory results with traceable assumptions and factor choices. The tool supports organizational boundary and operational boundary settings so different entity scopes can be calculated from the same underlying dataset. Plan A’s automation emphasis shows up in repeatable calculation runs and structured data import paths that reduce manual recalculation across reporting periods.
A tradeoff appears in how custom estimation setups and boundary configurations can require sustained governance to keep factor usage consistent across teams. Plan A fits best when a sustainability function needs controlled emissions calculations across multiple business units and reporting timelines, rather than one-off spreadsheets.
- +Traceable emissions calculation history for factor and input changes
- +Configurable estimation logic that links activity data to results
- +Boundary configuration supports multi-entity governance
- +Repeatable calculation runs reduce spreadsheet rework
- –Advanced factor and boundary configuration needs ongoing governance
- –Complex product footprint setups may require careful data preparation
- –Some edge-case data sources can be harder to model consistently
- –Role separation depth depends on how teams are mapped internally
Sustainability reporting teams
Build and rerun GHG inventories
Lower effort each reporting cycle
Procurement and operations teams
Manage supplier activity inputs
More consistent supplier reporting
Show 2 more scenarios
ESG data owners
Govern shared emissions master data
Fewer conflicting inventory versions
Admin workflows centralize factor usage and boundary settings so business units submit changes under reviewable structure.
Product sustainability analysts
Support product carbon footprint work
Faster product footprint modeling
Plan A supports product footprint calculations that reuse configured factor logic and standardized inputs.
Best for: Fits when sustainability teams need controlled emissions calculations across entities and repeated reporting cycles.
Watershed
enterpriseCarbon management software for emissions measurement, reporting, reduction, and climate programs.
Configurable emissions calculation workflows tied to business inputs with traceable change history for auditability.
Watershed helps sustainability teams manage activity data, map it to organizational and operational boundaries, and run repeatable emissions calculations aligned to GHG accounting needs. The workflow focus centers on ingesting inputs, maintaining factor selections, and keeping calculation history so teams can trace results back to underlying data changes. API and integration options support connecting internal systems like ERP exports and utility bill sources, which reduces manual re-entry. It fits organizations that need governance across business units, not just per-project carbon accounting.
A key tradeoff is that complex product footprint or life cycle assessment workflows require careful configuration of the activity structure and factor choices. Watershed fits best for ongoing organizational emissions programs where throughput matters, like monthly or quarterly recalculation from updated spend and energy data. Teams that primarily need bespoke product-level LCA depth may find the configuration effort higher than systems designed around deep product modeling.
- +Strong spend and utility input workflows for recurring emissions calculations
- +Audit trail supports tracing results back to data inputs and factor selections
- +APIs and integrations support automation beyond manual spreadsheets
- +Boundary configuration supports multi-unit governance
- –Product footprint and LCA depth depends on careful configuration of modeling structure
- –Setup requires governance discipline to keep factors and boundaries consistent
Sustainability reporting teams
Quarterly emissions refresh from multiple inputs
Faster refresh with traceable changes
ESG data and operations
Centralize emissions data across business units
Consistent inventory across units
Show 2 more scenarios
Finance ops and analysts
Automate emissions inputs from ERP extracts
Lower re-entry effort
Use integration and API flows to provision activity data without manual spreadsheet copy steps.
Compliance and governance teams
Support stakeholder review with audit trail
Review-ready audit trail
Provide traceability from results back to selected inputs and factor choices for controlled reporting.
Best for: Fits when sustainability teams need repeatable organizational emissions calculations with traceable inputs and automation.
Sphera
enterpriseEnvironmental, health, safety, risk, and sustainability software for complex enterprises.
Governed emissions calculation workflows that preserve factor and activity traceability through reporting preparation.
Sphera is designed for organizations that need controlled emissions calculation at scale, not just ad hoc spreadsheet math. It combines factor libraries, activity data intake, and audit trail oriented documentation so sustainability teams can explain how Scope 1 emissions, Scope 2 emissions, and Scope 3 emissions outputs were produced. Reporting execution ties to CSRD oriented workflows, including data preparation patterns that support consistent submissions.
A tradeoff shows up in implementation effort because enterprise coverage tends to require careful configuration of organizational and operational boundaries and clear ownership of source data. Sphera fits best when a sustainability program needs repeatable calculations across business units and when data ingestion from ERP or utility sources can be standardized into a recurring pipeline.
- +Configurable emissions calculations across scopes with traceable calculation logic
- +Factor library workflows support consistent emissions estimation inputs
- +Structured data preparation helps sustain repeatable CSRD reporting cycles
- +Automation focus fits recurring data refreshes across business units
- –Implementation and governance require strong internal data ownership
- –Advanced configuration can slow early iterations for new reporting boundaries
- –Some workflow depth depends on how organizations model processes and sites
- –Integrations may need custom mapping work for existing ERP fields
Sustainability reporting teams
Build CSRD-ready greenhouse gas inventory
More consistent audit trail.
ESG data management leads
Standardize activity data intake
Fewer calculation discrepancies.
Show 1 more scenario
Procurement and sourcing teams
Manage emissions factors for suppliers
Comparable supplier footprints.
Teams apply factor library governance to normalize estimation inputs for supplier-related emissions categories.
Best for: Fits when sustainability teams need governed, repeatable emissions calculations feeding CSRD reporting.
Persefoni
enterpriseEnterprise carbon accounting software for emissions data, reporting, and target management.
Evidence-linked carbon accounting workflows that keep calculations traceable to the inputs used for each reporting deliverable.
Persefoni is a greentech carbon and sustainability data system that turns audit-scoped inputs into calculated emissions outcomes. It differentiates itself with workflow-driven carbon accounting that can handle complex organizational boundaries and multi-source data flows.
- +Workflow-based accounting with evidence trails tied to calculation steps
- +API and integration surface designed for recurring data refreshes
- +Strong support for scope-based reporting across complex boundary setups
- +Factor library management reduces manual rework when assumptions change
- –Configuration depth can slow initial onboarding without a clear governance owner
- –Some reporting customization requires more model setup than spreadsheet workflows
Best for: Fits when sustainability teams need controlled emissions calculations with repeatable data ingestion and evidence trails.
Sweep
enterpriseCarbon management software for emissions data, supplier engagement, and reduction planning.
Evidence-linked calculation runs that preserve which inputs fed each output and which workflow state produced it.
Sweep captures sustainability data from distributed sources and converts it into emissions-related outputs through configurable calculations. The tool focuses on workflow-driven collection, evidence attachment, and reusable estimation logic so teams can repeat inventories across reporting cycles. Sweep also supports automation via integrations and API access to move activity inputs, maintain factor data, and keep audit trails tied to specific calculation runs.
- +Configurable calculation runs with linked evidence for traceable inventory updates
- +API access supports moving activity inputs and factoring logic into existing pipelines
- +Workflow collection reduces manual chasing for approvals and source documents
- +Reusable configuration helps standardize estimation logic across business units
- –Complex setups can slow down boundary definitions across nested operational structures
- –Less depth for product carbon footprint workflows than for org-level inventories
Best for: Fits when sustainability teams need evidence-linked data collection and repeatable emissions calculations across departments.
Diligent ESG
enterpriseESG software for sustainability data collection, reporting, risk, and board oversight.
Evidence-linked review workflows that connect content changes to controlled approvals and an audit trail for reporting cycles.
Diligent ESG targets sustainability teams that need governed ESG data workflows across reporting frameworks and internal stakeholders. It centralizes sustainability information management with configurable workflows, stakeholder reviews, and evidence tracking so drafts and source documents stay traceable.
- +Configurable review workflows with evidence attachment improves traceability
- +Audit trail captures data edits for reporting readiness evidence
- +Stronger governance controls for cross-team ownership and approvals
- +Integration-friendly architecture for pulling external ESG content into cycles
- –Workflow setup requires disciplined governance to avoid review bottlenecks
- –Some emissions preparation steps feel less standardized than specialist carbon tools
- –Admin configuration can become heavy across multiple reporting streams
- –Reporting output customization may require iterative configuration work
Best for: Fits when governance-heavy ESG reporting needs controlled collaboration, evidence tracking, and audit trail across functions.
Novisto
enterpriseEnterprise ESG data management software for reporting, disclosure, and sustainability performance.
A configuration-driven workflow that connects imported sustainability inputs to calculation and reporting outputs with traceable lineage.
Novisto centers on automating ESG and sustainability data workflows for enterprise reporting, with a workflow and integration layer that reduces manual consolidation. The system focuses on importing and normalizing emissions and sustainability inputs into report-ready structures for CSRD-style disclosures.
- +Workflow-based emissions data handling with clear steps from import to report output
- +Configuration-driven mappings reduce one-off spreadsheet labor across reporting cycles
- +Audit trail ties data changes to the actions that produced report inputs
- +Integration options support pulling operational inputs from existing enterprise systems
- –Emissions calculation setup can require sustained configuration work for first rollout
- –Advanced customization beyond standard mappings may depend on implementation support
- –Complex organizational boundary scenarios need careful input hygiene to avoid duplication
- –Reporting granularity can feel constrained when organizations require highly bespoke layouts
Best for: Fits when sustainability teams need workflow automation for emissions data consolidation and traceable reporting inputs.
Position Green
enterpriseESG management software for sustainability data, reporting, and regulatory workflows.
Evidence-first evidence attachments inside the emissions workflow that preserve an audit trail from input to reporting output.
Position Green is a greentech sustainability software focused on managing environmental data workflows for CSRD-style reporting use cases, with a strong emphasis on document-driven evidence. It supports greenhouse gas inventory construction with structured inputs for emissions activities and factors, then carries those calculations into reporting-ready outputs.
- +Evidence-led reporting workflow connects calculations to required documentation
- +Emissions workflow supports both factor-driven and activity-driven inventory inputs
- +API supports programmatic updates to reporting objects and calculation inputs
- +Configurable process steps reduce manual spreadsheet handoffs
- –Governance setup takes time when organizations require strict approval chains
- –Scope 3 coverage depends on how activity categories and estimation methods are configured
- –Some integrations still require preprocessing to match expected import formats
- –Large multi-site models can slow down review cycles without disciplined input hygiene
Best for: Fits when sustainability teams need configurable emissions workflows with audit-traceable evidence for structured reporting cycles.
Microsoft Cloud for Sustainability
enterpriseCloud software for sustainability data, emissions accounting, environmental reporting, and reduction planning.
Tenant-governed emissions calculation and reporting workflow with end-to-end audit trail tied to Microsoft identity and RBAC.
Microsoft Cloud for Sustainability ingests operational and enterprise data to calculate emissions, manage sustainability workflows, and publish reporting artifacts under Microsoft identity and administration controls. It provides configuration-driven calculation options that support both location-based and market-based energy accounting paths for utilities and energy attribute instruments.
- +Strong emissions calculation workflow with configurable activity-data mappings
- +Enterprise identity and RBAC model supports controlled collaboration
- +Audit trail captures user actions across data, configuration, and exports
- +Azure integration paths improve automation for data ingestion and processing
- –Scope and boundary setup demands disciplined governance to avoid rework
- –More advanced automation requires Azure-adjacent integration work
- –Large, multi-system activity data flows can be operationally heavy
- –Some reporting formats rely on curated templates rather than fully custom layouts
Best for: Fits when sustainability teams need governed calculations and reporting workflows integrated with enterprise IT systems.
Greenly
SMBCarbon accounting and sustainability software for companies measuring and reducing emissions.
Spend and activity intake that ties supplier and invoice data to greenhouse gas results with a consistent recalculation workflow.
Greenly focuses on emissions management for teams that collect sustainability inputs from procurement and operations data, not only from energy meters.
- +Invoice- and procurement-led intake reduces spreadsheet work for emissions estimates
- +Clear calculation trail helps trace outputs back to submitted inputs
- +Boundary configuration supports consistent rollups across business units
- +Reporting workflows align data preparation with CSRD-style disclosure needs
- –Coverage depth varies by data source type and may require manual cleanup
- –Automation strength depends on integration availability for each upstream system
Best for: Fits when sustainability teams need spend-centric emissions management with traceable calculations and CSRD-oriented reporting.
Conclusion
After evaluating 10 greentech software, Plan A stands out as our overall top pick — it scored highest across our combined criteria of features, ease of use, and value, which is why it sits at #1 in the rankings above.
Use the comparison table and detailed reviews above to validate the fit against your own requirements before committing to a tool.
How to Choose the Right Greentech Software
Sustainability teams buying greentech software typically need controlled emissions calculation workflows that keep every factor and assumption choice linked to the rollup results, not just the final inventory totals. This guide covers Plan A, Watershed, Sphera, Persefoni, Sweep, Diligent ESG, Novisto, Position Green, Microsoft Cloud for Sustainability, and Greenly, with each tool evaluated through the mechanics teams use to run recurring reporting cycles.
The selection tradeoffs cluster around integration breadth and automation surface for recurring data refresh, plus governance depth for traceability across reporting deliverables. Buyers can use the cards for Plan A and Watershed to anchor calculation repeatability, then compare Sphera, Persefoni, and Microsoft Cloud for Sustainability for governed workflows tied to reporting preparation and enterprise identity.
Greentech Software for governed emissions calculation, evidence-linked traceability, and reporting readiness
Greentech software helps organizations run greenhouse gas inventory and related sustainability reporting workflows by converting activity inputs into auditable calculation outputs with linked evidence for the deliverables. Tools like Plan A and Watershed focus on calculation workflows that preserve factor and assumption selections through each rollup, so changes to inputs and estimation logic remain traceable over repeated cycles.
In practice, the differentiator is how each greentech platform connects intake to output across org structure. Plan A and Sphera emphasize traceable calculation history for inventory audits and CSRD-oriented preparation, while Persefoni and Sweep center evidence-linked runs that keep each output tied to the inputs and workflow state used to produce it.
Emissions workflow controls that sustain audit trails through reporting cycles
Greentech software earns its place by keeping factor choices and assumption changes linked to the rollup outputs that teams submit for sustainability reporting, not by producing totals in a single run. Plan A and Watershed both center calculation workflows that preserve traceability from inputs to inventory results so recurring cycles stay defensible.
Traceability also depends on evidence handling and governance mechanics that teams can run repeatedly across entities, reporting boundaries, and workflow states. Tools like Persefoni, Sweep, and Position Green use evidence-linked runs or evidence-first attachments to connect calculation outputs to the documentation and workflow state behind each deliverable.
Traceable calculation history from inputs to rollup outputs
Plan A keeps calculation workflows tied to factor and assumption selections so changes remain explainable for inventory audits. Watershed similarly ties business inputs to emissions calculation workflows with traceable change history for auditability.
Evidence-linked outputs that preserve inputs and workflow state
Persefoni preserves evidence-linked carbon accounting so each reporting deliverable remains traceable to the inputs used for its calculations. Sweep keeps evidence-linked calculation runs that preserve which inputs fed each output and which workflow state produced it.
Governed workflows for repeatable emissions calculations feeding reporting preparation
Sphera emphasizes governed emissions calculation workflows that preserve factor and activity traceability through reporting preparation. Microsoft Cloud for Sustainability adds tenant-governed calculation and reporting tied to Microsoft identity and RBAC.
Workflow-based collaboration with audit trail for reporting readiness
Diligent ESG provides configurable review workflows with evidence attachment and an audit trail that captures data edits for reporting cycles. Sphera and Diligent ESG both target governed preparation steps where traceability depends on controlled collaboration.
API and automation surface for recurring refreshes and intake pipelines
Persefoni includes an API and integration surface designed for recurring data refreshes tied to evidence-linked workflows. Sweep also pairs API access with configurable calculation runs so activity inputs and factoring logic move into existing pipelines.
Configuration-driven mapping from imports to calculations and report outputs
Novisto uses configuration-driven workflows that connect imported sustainability inputs to calculation and reporting outputs with traceable lineage. Plan A and Novisto both reduce spreadsheet labor by keeping estimation logic linked to reusable mappings.
Select by matching the workflow philosophy to the reporting boundary complexity
The practical question is how each greentech platform maintains traceability when teams rerun calculations after factor updates, boundary changes, or refreshed activity data. Plan A and Watershed center calculation workflows that keep factor and assumption choices linked to rollup outputs, which suits repeat cycles across entities.
Another decisive fork is whether the platform treats evidence as first-class workflow material or as documentation attached to a governed process. Persefoni, Sweep, and Position Green anchor outputs to evidence linked to inputs and workflow state, while Diligent ESG focuses on evidence-linked review and approvals that connect content changes to a controlled audit trail.
Choose calculation history depth when boundary and factor governance drive audits
Select Plan A when controlled emissions calculations require factor and assumption choices to stay linked to each rollup result across inventory audits. Choose Watershed when recurring emissions calculations need traceable business-input workflows that preserve change history for auditability.
Choose evidence-linked run tracking when outputs must cite inputs and workflow state
Select Persefoni when each reporting deliverable must remain traceable to the inputs used for its calculation workflow with evidence trails tied to steps. Select Sweep when the priority is evidence-linked calculation runs that preserve which inputs fed each output and which workflow state produced it.
Choose governed collaboration when approvals gate reporting readiness
Select Sphera when governed emissions calculations must preserve factor and activity traceability as teams prepare for CSRD reporting cycles. Select Diligent ESG when review workflows must connect content changes to controlled approvals and maintain an audit trail across functions.
Choose evidence-first emissions workflows when documentation is embedded inside the run
Select Position Green when evidence-first attachments inside the emissions workflow must preserve an audit trail from input to reporting output. Select Position Green when scope coverage depends on how activity categories and estimation methods are configured.
Choose enterprise identity governance when sustainability work aligns to IT access controls
Select Microsoft Cloud for Sustainability when tenant-governed calculations and reporting workflows must tie to Microsoft identity and RBAC. Treat Scope and boundary setup discipline as part of adoption because governance misalignment can force rework.
Choose spend-centric intake when procurement and invoices drive the activity data
Select Greenly when supplier and invoice data are the primary inputs and emissions estimates should follow an invoice- and procurement-led intake workflow. If upstream integrations are inconsistent, plan for manual cleanup where automation strength depends on the available integration surface.
Who benefits from governed emissions workflows and traceable evidence trails
Sustainability teams benefit most when greentech software preserves traceability from activity inputs to emissions results so reporting cycles withstand internal review and external scrutiny. Teams that rerun calculations across multiple entities also need repeatable workflows with linked inputs and factor choices.
Some buyers need additional governance for collaboration and approvals, while others need evidence-first run tracking that ties documentation to each output. The fit differs sharply between Plan A and Watershed calculation-history models and Diligent ESG review workflow models, as well as between Microsoft Cloud for Sustainability identity governance and invoice-driven intake in Greenly.
Sustainability reporting teams running repeat CSRD-oriented cycles
Sphera supports governed emissions calculations designed to feed CSRD reporting preparation while preserving factor and activity traceability. Plan A also fits recurring reporting cycles where factor and assumption choices must remain linked to each rollup result for inventory audits.
Audit-facing teams that need factor and input change explainability
Plan A keeps traceable emissions calculation history for factor and input changes so audits can follow what changed between cycles. Watershed adds traceable change history tied to business inputs for recurring organizational emissions calculations.
Functions that must gate reporting readiness through approvals
Diligent ESG provides configurable review workflows with evidence attachment and an audit trail that captures data edits for reporting readiness evidence. This approach suits teams where collaboration steps are the main control point rather than only the calculation run itself.
Teams focused on spend and invoice ingestion for emissions estimation
Greenly ties procurement-led intake to greenhouse gas results through a consistent recalculation workflow that traces outputs back to submitted inputs. This supports orgs that can structure upstream data as supplier and invoice activity inputs.
Enterprise IT-aligned teams that must map access control to sustainability work
Microsoft Cloud for Sustainability supports tenant-governed calculations and reporting with end-to-end audit trail tied to Microsoft identity and RBAC. This fits organizations where access control and collaboration must follow existing enterprise identity patterns.
Common adoption pitfalls that break traceability or slow governance
Greentech tools can fail when governance discipline does not match the configuration depth needed for consistent emissions boundaries and factor selections. Several platforms explicitly require careful modeling structure and ongoing governance to keep factors and boundaries consistent across cycles.
Another frequent pitfall is choosing a platform that matches a calculation workflow but not the evidence or collaboration workflow that reporting actually requires. Evidence-linked run tracking and evidence-linked review workflows solve different control problems, so teams need to map their audit trail expectations to the tool mechanics.
Treating factor and boundary setup as one-time configuration instead of ongoing governance
Plan A and Sphera both require advanced factor and boundary configuration work to preserve traceability, and governance mistakes can force rework on new reporting boundaries. Watershed similarly needs governance discipline to keep factors and boundaries consistent across recurring cycles.
Overlooking that evidence-linked runs and review workflow approvals solve different traceability needs
Persefoni and Sweep preserve evidence-linked calculation runs that tie outputs to inputs and workflow state, which differs from Diligent ESG review workflows that connect content changes to controlled approvals. Choosing the wrong model can shift audit trail coverage away from where auditors expect it.
Assuming product carbon footprint depth matches org inventory strength without validating the modeling scope
Sweep signals less depth for product carbon footprint workflows than for org-level inventories, which can become a limitation if reporting requires deeper life cycle modeling. Plan A and Sphera emphasize traceable calculation workflows for inventory and reporting preparation, but footprint depth still depends on how modeling structure is configured.
Underestimating the setup work needed for configuration-driven workflows during first rollout
Novisto can require sustained configuration work for first rollout because workflow mappings connect imported inputs to calculation and reporting outputs. Position Green also notes governance setup takes time when strict approval chains are required.
Relying on spend-centric automation when upstream integration coverage is incomplete
Greenly automation strength depends on integration availability for upstream systems and may require manual cleanup where data sources vary in completeness. Teams that cannot stabilize their invoice and procurement feed often lose time during repeated recalculation cycles.
How analysts built the shortlist using documented workflow mechanics
Analysts used published information from the original sources to capture the figures and workflow claims that describe how each greentech platform maintains traceability and supports recurring reporting cycles. Search tools opened the original publication pages and copied each figure alongside the passage that stated it, then analysts compared each copied figure with official documentation and the vendor changelog.
Analysts kept a figure only when it matched those sources and included a published benchmark only when that benchmark was the cited basis. Plan A stood out in the shortlist because its calculation workflows keep factor and assumption choices linked to each rollup result to support repeatable emissions calculations for inventory audits.
Frequently Asked Questions About Greentech Software
How do EcoVadis, Sphera, and SAP Sustainability Control Tower handle emissions data lineage during reporting?
Which greentech tools offer API access for automating data provisioning and calculation refresh cycles?
How do these systems support SSO and tenant-level access controls for sustainability workflows?
What breaks if an organization switches factor assumptions mid-cycle in Plan A or Persefoni?
How does data migration work when moving from spreadsheets into Sweep or Position Green?
Which tools are better for integrating spend-based emissions inputs versus utility bill ingestion?
When do Sphera and Persefoni differ most in how they structure calculation approaches across Scope work?
How do admin controls and audit logs show up for review and approvals in Diligent ESG versus Plan A?
Where does extensibility matter most when connecting IoT telemetry or other operational sources into emissions workflows?
Tools reviewed
Primary sources checked during evaluation.
Referenced in the comparison table and product reviews above.
Funding and competing interests
This study was co-funded by several of the vendors assessed in it. No single vendor funded it. Funders could propose the market studied.
They had no role in selecting vendors, setting or weighting criteria, analysing data or drawing conclusions, and they received the same factual-accuracy check as every other vendor assessed.
Market definition, inclusion rules and criteria weights were fixed by an editor before research began and did not change afterwards. Editorial process →
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