David Klein
One Peak
Co-Founder and Managing Partner
London, UK

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Category: Emerging Growth
Mark: AA

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Biography

David is Co-Founder and Managing Partner of One Peak, a leading growth equity firm backing exceptional B2B software companies. With over 20 years of experience, David has built a reputation for identifying category-defining businesses early and partnering closely with founders to scale globally.


Since One Peak’s founding in 2014, David has overseen investments in 25 high-growth software companies across cloud infrastructure, cybersecurity, vertical and horizontal SaaS, data analytics, and AI-driven platforms. Notable portfolio companies include Akur8, Ardoq, Deepki, DocPlanner, Keepit, Neo4j, and PandaDoc. Known for his hands-on approach, David supports founders on strategy, product, go-to-market, and talent, helping companies rapidly scale and achieve market leadership.


Prior to founding One Peak, David held senior investment roles at Summit Partners and Morgan Stanley Principal Investments. He holds a master’s degree in economics and business administration from the University of St. Gallen, Switzerland.


Awards

Top Software Investors: 2025, 2024, 2023