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25madison is a venture studio and investment firm that collaborates with founders to build and scale innovative companies, providing capital, resources, and operational expertise.
25madison is a venture studio and investment firm that partners with entrepreneurs to create and grow innovative businesses from the ground up. 25madison helps founders navigate the early stages of company development, from concept to launch and beyond. The firm leverages its in-house team of experts and extensive network of advisors to provide strategic guidance, technical resources, and market access, ensuring startups have the support they need to succeed. Focused on building high-growth companies across various sectors, 25madison is committed to fostering innovation and driving long-term value creation for its portfolio businesses.

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Polaris Partners, established in 1996, is a top venture fund headquartered in Boston, MA with offices in New York and San Francisco, investing in technology and healthcare companies. They partner with visionary entrepreneurs, offering capital, guidance, and support to build transformative companies, emphasizing true partnerships and mutual respect.
With a global presence, Accel Partners also maintains a significant focus on San Francisco. Their portfolio includes companies across various sectors, and they are committed to nurturing entrepreneurship and driving innovation in the region.
Techstars, founded in 2006 and headquartered in Boulder, Colorado, is the world's most active pre-seed investor, focusing on tech startups through accelerator programs and venture funds. With a $115.7 billion portfolio and 3,900 mentors, they offer $120K investments and lifelong network access, empowering over 9,700 founders in diverse tech verticals.