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Johannes Fiegenbaum

Johannes is a sustainability consultant and early-stage climate tech investor. With a background in marketing technology, he now helps companies grow sustainably—whether through ESG strategy, carbon accounting, or positioning for Article 9 VC funds. He regularly writes about corporate decarbonisation, product LCAs, and climate innovation, drawing on hands-on experience with startups, investors, and sustainability leaders across Europe.

Measuring Your Startup’s Impact: Choosing Between Triple Top Line and Lifecycle Assessment

Discover how startups can measure impact using the Triple Top Line framework or Lifecycle Assessment to meet sustainability goals and regulatory demands.

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Impact Reporting in Venture Capital: Driving Sustainable Success with the Triple Top Line Framework

Discover how impact reporting and the Triple Top Line Framework help VCs measure financial, social, and environmental outcomes for sustainable investments.

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AI for Impact Startups: Cut CO₂ Costs Without Funding

How European startups calculate a product carbon footprint with AI: tool selection by ISO 14067 coverage, data needs, EU hosting and cost at zero budget.

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ESG vs. CSR: Navigating the Shift to Sustainable Corporate Strategies in 2025

CSR is voluntary and narrative, ESG is measurable and partly binding in the EU. The difference explained, plus where sustainability fits and which matters more.

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Ten Climate Tech Niches Under €1 Billion and the EU Rules Behind Them

Ten climate tech niches under €1 billion, each tied to the EU rule that creates the buying moment: instrument, first compliance wave and who has to buy.

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Degrowth vs Green Growth: Strategic Choices for Sustainable SMEs

Explore how German SMEs can balance Degrowth and Green Growth strategies to achieve sustainable success and meet ecological and economic goals.

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