Heavybit is a San Francisco–based venture capital firm focused on investing in early-stage enterprise infrastructure startups. Founded over a decade ago, the firm has established itself as a premier backer of technical founders building category-defining companies. With a portfolio that spans 47 cities across 15 countries, Heavybit combines capital with deep domain expertise and a robust platform to support startups from day zero.
Heavybit invests in pre-seed and seed-stage companies building AI-native solutions across infrastructure, cybersecurity, and enterprise software. The firm is especially interested in developer-first products and tools that redefine how software is built, deployed, and scaled globally.
In July 2025, Heavybit closed two new funds: its fifth flagship pre-seed and seed fund, and its second opportunity fund, with a combined total of over $180 million.
The flagship fund continues the firm’s strategy of leading early rounds with initial checks ranging from $500,000 to $5 million.
The opportunity fund provides follow-on capital to support portfolio companies through later stages of growth. These vehicles enhance Heavybit’s ability to partner deeply with founders from inception through scale.
Founders benefit not only from capital but also from the firm’s extensive go-to-market support, which includes a global network of more than 1,000 expert advisors and a hands-on platform team with deep technical and operational experience.
Leadership
Heavybit is led by founder and managing director Tom Drummond, alongside general partner Joseph Ruscio. Together, they bring deep experience in enterprise software and developer infrastructure, having supported early-stage companies through product development, customer acquisition, and organizational scaling.
Investment Strategy
Heavybit is a conviction-driven investor that leads pre-seed and seed rounds globally, with a focus on highly technical founding teams. The firm differentiates itself by offering structured go-to-market acceleration, leveraging a global community of advisors and a founder-centric approach to product and sales execution. Heavybit aims to identify technical trends early, back the builders of foundational platforms, and stay involved as a long-term partner through its opportunity funds.
Notable Investments
Heavybit has backed the founders of several category-defining companies, including:
Notable Exits
PagerDuty stands out as one of Heavybit’s marquee exits, having gone public in 2019. The firm’s portfolio continues to mature with multiple emerging leaders attracting strong interest from acquirers and public markets.
Other
Heavybit is recognized not only as a venture capital firm but also as a community and programmatic support ecosystem for technical founders. The firm operates with a unique blend of investor expertise and operational mentorship, making it particularly attractive to engineers launching infrastructure products.
Its content-driven approach and global founder support network make it one of the most influential institutions in developer-first venture investing.
