Blumberg Capital is an early-stage venture capital firm headquartered in San Francisco, California. David Blumberg founded the firm around 2002 after careers at several investment and technology companies. The firm concentrates on seed and Series A rounds in B2B software, fintech, cybersecurity, and enterprise data. It has built a particular reputation as a bridge between the United States and Israeli tech ecosystems, backing founders in both geographies across multiple fund cycles.
The firm keeps a focused portfolio rather than deploying capital broadly across many bets. Investment sizes at entry typically range from a few hundred thousand dollars to a few million at seed stage, with follow-on capital reserved for top performers. Blumberg Capital does not publicly disclose assets under management, which is common for smaller, partnership-led funds of its type. Public information about total AUM is limited.
In the broader technology space, Blumberg Capital's most widely cited success is CrowdStrike, the cybersecurity company that went public on Nasdaq in 2019 and became one of the defining enterprise security platforms of the decade. The firm also backed Fundbox, a working-capital fintech that raised several hundred million dollars in equity and debt before market conditions tightened. Other portfolio companies have included Lendio, a small-business lending marketplace, and various Israeli enterprise software startups that Blumberg Capital supported during their earliest rounds.
Notable investments
- CrowdStrike – endpoint security platform; Nasdaq IPO 2019; one of the most successful cybersecurity exits of the 2010s
- Fundbox – B2B fintech lending; raised $300M+ across equity and debt rounds
- Lendio – small-business loan marketplace; facilitated billions in SBA and fintech loans
- Various Israeli B2B SaaS startups – the firm has backed multiple early-stage companies through its US-Israel investment corridor
Blumberg Capital's crypto and blockchain portfolio is modest by the standards of dedicated Web3 funds. Based on available data, the firm has made approximately five investments in the digital assets and blockchain space, with one deal recorded as a lead. The specific names of those crypto portfolio companies are not consistently surfaced in public databases, and the firm does not maintain a detailed public-facing portfolio page for this segment. Public information about individual crypto positions is limited.
Team
David Blumberg is the founder and managing partner. He studied at Harvard and later earned an MBA, and worked in investment roles before starting the firm. He has been a vocal advocate for the US-Israel startup corridor and has spoken at conferences including the AIPAC Policy Conference and various fintech summits. Beyond Blumberg, the firm employs a small investment team; individual partner names beyond David Blumberg are not consistently disclosed in public sources.
Recent activity
In 2024 and into 2025, Blumberg Capital continued backing early-stage B2B companies in its core verticals. The firm has not announced a large new fund in the public record during this window, which may reflect either quiet fundraising or a hold period as many institutional LPs slowed commitments to venture during the rate cycle of 2023–2024. No major exits or write-downs have been publicly announced in the most recent 18 months.
For a firm of Blumberg Capital's profile – early-stage, sector-focused, with genuine exits on record – the limited crypto footprint is consistent with its broader investment philosophy. The firm has historically preferred capital-efficient B2B software over speculative asset categories. Any expansion into digital assets appears selective rather than thematic. Investors tracking Blumberg Capital for crypto-specific deal flow should monitor its Crunchbase profile and the firm's official site for portfolio updates, as the most granular data is not aggregated in third-party databases.