Every SME hitting a customer questionnaire, a bank loan application, or a tender ends up asking the same question: which software is actually built for us?
The enterprise leaders (Persefoni, Watershed, Sweep, Plan A) are priced and scoped for companies with dedicated sustainability teams. The alternative — Excel with emission factors — breaks the moment you need a signed report, a peer benchmark, or a estimate.
This guide covers the non-negotiable features, methodology red flags, integrations that save weeks of manual work, and typical price bands so you can shortlist in a day.
Non-negotiable features
Automated , 2, and spend-based calculation using peer-reviewed databases (DEFRA, EPA, IEA, or Ecoinvent). Region-specific electricity grid factors — a UK kWh is not a Cyprus kWh. Native support for at least VSME and GHG Protocol Corporate Standard. Export to PDF, XBRL (for CSRD-scoped customers), and CDP.
Integrations that eliminate manual entry: bank feeds for spend-based categories, utility bill OCR, HRIS for headcount, fleet cards for fuel. Multi-user access with roles. Audit trail on every datapoint.
Red flags in vendor demos
No published methodology. Emission factors that don't cite a source. Reports built in Word/PowerPoint templates instead of a structured data model. No support for if you plan to grow into . Per-employee pricing with no cap — punitive for growing teams.
Interactive tool
01 / 03
Scope 1 / 2 / 3 mini-calculator
Rough annual emissions estimate. For directional planning - replace with metered data before reporting.
Estimated total
199.4
tCO₂e / yr
Emissions split
Uses simplified 2024 EU-average factors (natural gas 0.184, diesel 2.51 kg/L, EU grid 0.253, road travel 0.171 kg/km, spend-based S3 0.35 kg/€). Not audit-grade.
Typical SME pricing bands
Entry (up to ~50 FTE): €150–€400/month for +2 + basic , -ready reports, and 1–2 integrations. Growth (50–250 FTE): €400–€1,500/month with full Scope 3, materiality, and multi-entity. Anything above €30k/year is enterprise pricing dressed as SME.
FAQ
Frequently asked questions
Can I do this in Excel?
For a single Scope 1+2 snapshot, yes. For anything shared with a customer, bank, or auditor — no. Excel has no audit trail, no version control, and no methodology enforcement.
Do I need to pay for a Scope 3 module?
If you supply into a CSRD-reporting customer, yes. If you're only answering a bank ESG questionnaire, a spend-based Scope 3 estimate is usually enough.
How long does implementation take?
For a 30–100 FTE SME with organized utility bills and one accounting system, a first credible Scope 1+2 report takes 2–4 weeks. Scope 3 adds another 2–4 weeks.
What about AI features?
AI is useful for OCR on bills and drafting narrative sections. Be skeptical of AI features that generate emission estimates without traceable factors — auditors reject them.
SME-native carbon accounting, priced like software should be
Vuneli delivers audited-grade Scope 1, 2, and 3 reporting for SMEs — with published methodology, EU-specific factors, and pricing that doesn't punish you for growing.
