Introducing 1esg.app: ESG reporting that fits a mid-market budget

Why we built it

ESG reporting at mid-market companies is broken. Sustainability leads spend three to six months wrestling with Excel, twelve supplier PDFs and a Slack thread — only to hand €32,000+ to a consultancy and still send the report back to the auditor with open questions.
Large enterprises have ten-person ESG teams and six-figure software contracts. Mid-market companies in CSRD wave 2, 3 and 4 do not. They need a tool that understands the frameworks, captures audit-ready evidence on every row, and produces a defensible report — without a quarter-long implementation.
That is what 1esg.app is for.

What's in the box

Full E + S + G coverage in one workspace, mapped to ESRS topic codes from day one.
Double materiality assessment with stakeholder engagement, IRO scoring and rationale capture — the exact artefacts your auditor will ask for.
Scope 1, 2 and 3 emissions with version-pinned emission factors from DEFRA, EPA and IEA. Per-row source, factor, uploader and reviewer — every datapoint is traceable.
SBTi-aligned target tracking from baseline through trajectory, with location-based and market-based Scope 2 side by side.
A supplier portal that collects Scope 3 data without chasing PDF attachments. Send a tokenised link, suppliers fill in a structured form, the data lands in your inventory.
One-click reports for CSRD/ESRS, GHG Protocol, ISO 14064 and GRI — same underlying data model, four export targets.

Built for the people doing the work

Sustainability leads, CFOs and COOs at companies between 250 and 5,000 employees. The teams who do not have a dedicated ESG function but are now in scope for CSRD wave 2 (FY2025) or wave 3 (FY2026), or are receiving CDP-style questionnaires from in-scope customers. The teams who need to ship a report, not reinvent the wheel.

The economics

A typical mid-market CSRD engagement runs €32,000 to €96,000 in year one, plus internal time.
1esg.app is €299 per month — €3,588 per year — for the full platform, all frameworks, unlimited datapoints and the supplier portal. Free tier available for teams getting started.
Same audit trail. A fraction of the time. A fraction of the cost.

What's next

Over the coming weeks we are rolling out an AI copilot that reads uploaded utility bills and supplier responses, suggests material topics from your sector profile, and drafts narrative sections of your report — always with the underlying numbers exposed for review.
We are also expanding the emission factor library and adding a benchmarking layer so you can see how your intensity compares within your sector.

Try it today

Spin up a workspace in two minutes, or click into the live demo to see a fully populated example company. If CSRD wave 2 is on your 2026 roadmap, take fifteen minutes for a guided walkthrough — we will show you the platform on your own data.