Sunhat Helps 500+ Enterprises Close Compliance Proof Gap With AI Platform
A growing number of enterprises are turning to AI for ESG proof.
Sunhat has raised €14.2 million since its 2022 founding to solve what its chief executive calls a proof problem, not a sustainability problem. The Cologne-based startup builds AI software that pulls ESG and compliance data from across an enterprise and converts it into verified, audit-ready answers in minutes. It already serves thousands of users at companies including EnBW, Ingredion, Grundfos and Geberit across more than 20 countries, and is now targeting 500 enterprise clients as it pushes into the UK and North America.
“Enterprises don’t have a sustainability problem, they have a proof problem,” said Lukas Vogt, CEO and co-founder. “Companies are meeting standards, building quality systems, and hitting sustainability goals. But when someone asks for proof, finding it and making sure it checks all the boxes takes too long.”
Sunhat closed a €9.2 million Series A in September 2025, led by CommerzVentures, the Commerzbank venture arm focused on fintech and climate technology. Returning backers Capnamic, EnBW New Ventures, xdeck and WEPA Ventures also participated. The company had previously raised a €2 million seed round in May 2023 and extended it to €5 million in early 2024 after adding EnBW New Ventures. The company reports tenfold growth over the 15 months preceding the Series A, though it has not disclosed revenue figures.
The idea came from Vogt’s own frustration. While working as an investment manager at Capnamic, the Cologne-based venture capital firm, he found himself spending hours responding to sustainability questionnaires from limited partners and portfolio companies. Vogt had studied finance at the University of Cologne and later completed a sustainability management program at the Cambridge Institute for Sustainability Leadership, giving him an unusually direct view of both the investment and reporting sides of ESG.
He approached two contacts from his professional network. Alexander Behr, now chief product officer, had served as Innovation Principal at Axa Ventures and previously co-founded the startup Snooze Project. Ali Kamalizade, the chief technology officer, was building enterprise SaaS products. Together they interviewed dozens of corporate sustainability teams and found the same pattern everywhere: qualified professionals spending the bulk of their time on administrative work, copying answers between spreadsheets, chasing documents across departments and rebuilding evidence packages from scratch for every new questionnaire. Research the company cites puts the cost at roughly 360 hours per employee per year spent searching for the right documentation.
Sunhat’s answer is a platform it calls Proof AI. The system connects to tools an enterprise already runs, from SharePoint and OneDrive to ERP systems, carbon accounting software and specialized ESG, EHS and quality management platforms. When a questionnaire, audit request or due diligence form arrives, Proof AI maps the requirements against frameworks like ISO 9001, ISO 14001, CDP and the EU’s Corporate Sustainability Reporting Directive. A proprietary Similarity Score matches each question to previously validated answers already in the company’s systems, generating a source-linked, verified response package ready to send. The platform also monitors documentation health in real time, alerting teams when certificates are expiring or records are incomplete.
The company says customers typically see a 50% to 70% reduction in response time on their first assessment, improving to 80% to 90% as the platform learns. The company supports modules for EcoVadis, CDP, CSRD, MSCI ESG ratings, Sustainalytics and ISO certifications among others, and holds accreditations as an official EcoVadis Consulting Partner and CDP Accredited Solutions Provider. Most clients start with one painful assessment and then expand Sunhat across departments. Sales teams use it to unblock deals stalled by sustainability questionnaires. Legal and finance pull verified data on demand. The C-suite monitors proof readiness across the organization.
That cross-functional creep is central to how the company differentiates itself. Unlike broader compliance platforms such as Workiva and AuditBoard, or carbon accounting tools like its partner Cozero, the company does not measure ESG performance or calculate emissions. It sits on top of those systems as a horizontal proof layer, focused entirely on finding, verifying and delivering the evidence that stakeholders demand. Vogt describes it as the difference between a library and a librarian: one stores files, the other understands what they prove, who needs them and how they map to specific requirements.
“Too many companies lose deals just because they can’t move fast enough,” said Paul Morgenthaler, Managing Partner at CommerzVentures, which led the Series A. “We backed Sunhat because it turns that pain into an advantage. Proof AI knows what proof is needed and has it ready, so teams can respond instantly and confidently. That speed wins business.”
Sunhat is scaling into a market with strong structural demand. The global governance, risk and compliance platform market is projected to grow by more than $44 billion between 2025 and 2029, according to Technavio. The EU’s CSRD was originally expected to draw roughly 50,000 companies into mandatory sustainability reporting, though the Omnibus agreement reached in December 2025 significantly narrowed that scope, limiting requirements to companies with more than 1,000 employees and €450 million in turnover. Even with the reduced mandate, supply chain due diligence laws across Europe continue to generate downstream questionnaires for suppliers that were never directly regulated. Sunhat sells exclusively to organizations with more than €1 billion in annual revenue or over 5,000 employees, a segment where the compliance burden remains heavy regardless of regulatory shifts.
The company plans to use its Series A to double headcount, develop Proof AI to validate compliance with more than 100 global standards and certifications, and build 20 new integration partnerships across enterprise software, ESG and finance. The startup operates as a remote-first company out of Cologne, with a team of around 35 drawn from seven nationalities.
Risks are real. The Omnibus agreement has already cut the number of companies subject to mandatory CSRD reporting by an estimated 80%, and further regulatory rollbacks remain possible. North America, where the company is now expanding, presents a less uniform regulatory environment and more polarized corporate attitudes toward sustainability disclosure. And as the AI compliance category heats up, larger incumbents could build or acquire their way into its niche before it locks in enough enterprise customers to defend its position.
Vogt is betting they will not move fast enough. The proof gap, as Sunhat defines it, is the time and effort between what enterprises know internally and what they can report externally. For most companies that gap still runs to weeks. For its customers, the company claims, it runs to minutes. Whether that speed advantage holds as the startup scales toward its 500-enterprise target will determine if it becomes the category leader it is positioning itself to be, or another well-funded competitor that found a problem faster than it could own it.
