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Founded in 2015, Underscore VC is a Boston-based venture capital firm that specializes in early-stage investments, particularly at the Pre-Seed and Seed stages. The firm has adopted a unique 'open-source' investing model, which allocates 10% of General Partner (GP) profits to over 1,800 Core Partners. These partners are seasoned operators and experts who provide non-dilutive support to portfolio companies, enhancing their chances of success. With a portfolio of over 114 investments and more than 60 active companies, Underscore VC has established itself as a significant player in the venture capital landscape. The firm has successfully backed two unicorns and facilitated over 12 acquisitions, showcasing its ability to identify and nurture high-potential startups.
Underscore VC's Fund III, which closed in 2024, has a total size of $58 million, allowing the firm to maintain a concentrated portfolio. The firm is known for its commitment to B2B software solutions, focusing on sectors such as fintech, healthcare, and vertical SaaS. With a geographic presence that is primarily rooted in Boston but also spans the rest of the United States, Underscore VC is well-positioned to leverage local expertise while remaining open to opportunities nationwide. The firm's reputation for community-driven support and its innovative profit-sharing model distinguish it from traditional venture capital firms, making it an attractive partner for early-stage entrepreneurs.
Underscore VC focuses exclusively on Pre-Seed and Seed investments, with check sizes ranging from $500,000 to $3 million. The firm's sweet spot is around $1 million, where it typically leads or co-leads funding rounds. The investment strategy is balanced between vertical SaaS and fintech/emerging technologies, with approximately 50% of investments in each category. The firm conducts a thorough 2-3 week diligence process before making investment decisions, ensuring that they back only the most promising entrepreneurs and innovative solutions.
Geographically, Underscore VC maintains a strong presence in Boston, while also being geography-agnostic, with about 50% of its investments located outside of the Boston area. The firm deliberately avoids sectors such as biotech, medtech (FDA), and pure hardware, focusing instead on B2B software solutions that address impactful problems. This targeted approach allows Underscore VC to concentrate its resources and expertise on startups that align with its vision of fostering bold, early-stage entrepreneurs who are committed to making a difference in their respective industries.
Underscore VC boasts a diverse portfolio of over 114 investments, including two unicorns and more than 12 successful acquisitions. Notable portfolio companies include Coda, Project44, and Salsify, which have demonstrated significant growth and market impact. The firm has been particularly active in the past year, making seven investments, with recent notable deals including Slang AI in February 2026 and Quilt Health, which received a $6 million Seed investment. Terra Security also received a Series A follow-on investment, further illustrating Underscore VC's commitment to supporting its portfolio companies through various stages of growth.
The firm's focus on B2B software solutions has allowed it to build a robust portfolio that spans multiple sectors, including fintech, healthcare, and vertical SaaS. This strategic diversification not only enhances the firm's overall investment performance but also provides valuable insights and synergies among its portfolio companies. Underscore VC's ability to identify and nurture high-potential startups has solidified its reputation as a leading venture capital firm in the early-stage investment landscape.
Underscore VC Team: The firm is led by a team of experienced partners who have successfully transitioned through generational changes with the launch of Fund III in 2024. Each partner brings a wealth of knowledge and expertise in various sectors, particularly in B2B software and emerging technologies.
To pitch Underscore VC, founders should prepare a detailed presentation that outlines their business model, market opportunity, and team. The firm prefers to receive pitches through warm introductions, but cold applications are also accepted. Founders should ensure their pitch includes key metrics and a clear vision for their startup.
Underscore VC operates the Pearce Summer Fellows program, which provides opportunities for aspiring entrepreneurs to gain hands-on experience and mentorship within the startup ecosystem. The firm also engages in academic partnerships with institutions like Harvard and MIT, fostering collaboration and innovation in the tech space.
In recent activity, Underscore VC has made seven investments in the last twelve months, with the latest being Slang AI in February 2026. The firm also invested $6 million in Quilt Health during the same period. Fund III, which closed in 2024, has a total size of $58 million, allowing Underscore VC to continue supporting its portfolio companies effectively.
Underscore VC exclusively invests in Pre-Seed and Seed stages, focusing on early-stage B2B software startups. The firm typically invests between $500,000 and $3 million, with a sweet spot around $1 million.
Founders interested in pitching Underscore VC should prepare a concise presentation that highlights their business model, market opportunity, and team. The firm prefers to lead or co-lead funding rounds and conducts a thorough 2-3 week diligence process before making investment decisions.
Underscore VC primarily focuses on sectors such as fintech, healthcare, vertical SaaS, and other emerging technologies. The firm avoids investments in biotech, medtech, and pure hardware.
The typical check size for Underscore VC ranges from $500,000 to $3 million, with the firm often investing around $1 million in its sweet spot.
While Underscore VC is rooted in Boston, it is geography-agnostic, with approximately 50% of its investments located in Boston and the other 50% spread across the rest of the United States and internationally.
Underscore VC offers extensive support through its network of over 1,800 Core Partners, who provide hands-on assistance in areas such as hiring, customer validation, and strategic guidance. This community-driven approach enhances the resources available to portfolio companies.
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