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Built by a licensed German audit firm

Review sustainability reports like an auditor.
In self-service, backed by an audit firm.

Cupel reviews your sustainability report with the methodology of a licensed audit firm: structured, traceable, in hours instead of days. Book experts only when you actually need them.

Join the beta How it works

Licensed audit firmEU serversNo training on your data

Cupel: AI review comments on a sustainability report across Clarification, Evidence, and Proofreading

Real-world ESG claims

I see something you don't see…

Every claim below appeared in a real sustainability report. Can you spot what’s missing?

We achieved carbon neutrality across our operations.

More than 80% of our products are now recyclable.

All suppliers underwent a human rights audit this year.

We reduced water consumption by 25% since 2022.

Every executive’s bonus now includes ESG metrics.

We achieved carbon neutrality across our operations.

More than 80% of our products are now recyclable.

All suppliers underwent a human rights audit this year.

We reduced water consumption by 25% since 2022.

Every executive’s bonus now includes ESG metrics.

Our renewable energy share reached 90% in 2024.

Product X carries a cradle-to-gate carbon footprint label.

Zero waste was sent to landfill from our factories.

Community investments exceeded €10 million last year.

Employee engagement reached 88% in the latest survey.

Our renewable energy share reached 90% in 2024.

Product X carries a cradle-to-gate carbon footprint label.

Zero waste was sent to landfill from our factories.

Community investments exceeded €10 million last year.

Employee engagement reached 88% in the latest survey.

We launched a global biodiversity restoration program.

All packaging will be plastic-free by 2027.

Scope 3 emissions dropped 18% versus baseline.

We offset business travel emissions through certified projects.

100% of sourced cotton meets the Better Cotton Initiative.

We launched a global biodiversity restoration program.

All packaging will be plastic-free by 2027.

Scope 3 emissions dropped 18% versus baseline.

We offset business travel emissions through certified projects.

100% of sourced cotton meets the Better Cotton Initiative.

The auditor's eye. For everyone.

As experienced auditors grow scarcer, the methodology has to move into the tool.

The shortage of skilled auditors hits report review twice over: methodological know-how sits in fewer and fewer heads, and day to day there is no time left to work through a 120-page report in a structured way. Cupel turns audit methodology into a process. It automatically handles up to 60 percent of the routine work, across around 100 built-in review use cases in three dimensions. That keeps the mind free for what experience is actually needed for: substantive judgment.

With Cupel

Without (manual work or a generic AI tool)

With Cupel

A structured process across around 100 review use cases

Without (manual work or a generic AI tool)

Review from memory, as good as the day allows

With Cupel

Up to 60% of the routine work handled automatically

Without (manual work or a generic AI tool)

Every finding tracked down by hand

With Cupel

A clear head for substantive judgment

Without (manual work or a generic AI tool)

Time tied up in evidence-gathering and formalities

With Cupel

The methodology of a licensed audit firm, built by a certified public accountant with experience at three of the four largest audit firms

Without (manual work or a generic AI tool)

A generic language model with an ESG prompt

With Cupel

Criminally enforced professional secrecy (Section 203 StGB), licensed audit firm

Without (manual work or a generic AI tool)

Confidentiality clause, software company

Two ways to use Cupel

Review reports yourself, or offer Cupel to your clients under your own brand. You choose the path that fits your firm.

Self-service for auditors

Review reports yourself, in hours instead of days, with the methodology of a licensed audit firm. Book expert hours only when you actually need them.

Explore self-service

White-label for audit firms

Offer your clients AI-assisted report review under your own brand, without building it yourself. With strict isolation per firm and engagement.

Request white-label

The difference no software can copy

Run by auditors, bound by professional secrecy.

Other AI tools promise confidentiality. Cupel is liable for it, criminally bound, as a licensed German audit firm.

Section 203 StGB, personally enforced

Disclosing data here risks a prison sentence, not a contractual penalty. It is the strongest confidentiality commitment German law knows, stronger than any ISO standard.

Your counterparty is an audit firm

You contract with a licensed audit firm, not a startup. Section 50a WPO is binding professional law for us, not a voluntary gesture.

Hosted in Frankfurt (AWS)

Operated in AWS Frankfurt (eu-central-1), in-region routing, AES-256 encrypted. Your data never leaves the European Union.

No training on your data

Your reports never train an AI model and never cross the boundary of your engagement. The reference store is user-isolated and opt-out at any time.

More on security

The roadmap

Built as a review platform for corporate reports. We start with sustainability.

Cupel (the cupel, the crucible used to assay precious metal) keeps the brand deliberately standard-agnostic. Today the sharp focus is on sustainability reporting under ESRS, where the pressure and complexity are greatest.

Mid-term, the path opens toward the assurance of financial reports and annual accounts. Every corporate report has to be reviewed, sustainability today, every report tomorrow.

Private beta

Join the beta

Sign up to secure early access to Cupel. We get in touch personally, and beta participants receive special conditions at launch.