General Info
Alexander Rosen, a Managing Director at IDG Ventures USA, brings over 20 years of experience as an investor and ‘consigliere’ to early-stage technology entrepreneurs. His investment focus includes cloud infrastructure, SaaS applications, ad tech, and consumer marketplaces, with a particular passion for companies at the intersection of consumer and enterprise technologies. With a track record that includes investments in various successful ventures like Chubbies, Krux, MindMeld, and Smartling, Alexander has proven his expertise in identifying and nurturing promising startups. His investment check size and partnership style are tailored to support founders effectively, aiming to provide the right resources and strategic guidance for growth. Alexander’s professional career spans across notable firms like Sprout Group, showcasing his diverse background and valuable insights. Additionally, he holds BS degrees in electrical engineering and economics from MIT and an MBA from Stanford University, further enriching his strategic approach to investments.
Location: San Francisco, CA
Country: Russian Federation
Industries:
Investment Regions: NA, SEA
Investment Stages: pre-seed, seed
angel-individual
NA, SEA
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🤖 AI Activity Report
Status: very-active
AI Reasoning: Found recent investments and portfolio roles indicating activity within the past 6 months. Ridge Ventures (Alexander Rosen) lists portfolio companies including Horizon3.ai and others; he has been active with investments such as Horizon3.ai and MaintainX in 2025/2024 timeframe, placing his latest known investment less than 6 months ago, so tag as very-active.
Angel activity thresholds:
Low Activity – Only known angel investments more than 12 months ago.
Active – Known angel investments between the last 12 and 6 months.
Very Active – Known angel investments in the last 6 months.
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