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Join Capital is a venture capital firm founded in 2015 and based in Berlin, Germany. The organization is dedicated to investing in early-stage technology companies, particularly in the deep tech sector, which addresses complex and foundational challenges across various industries. With a strong emphasis on intellectual property and competitive advantages, Join Capital aims to build companies that tackle significant global challenges through foundational technologies.
As of now, Join Capital manages a fund size of €235 million and has invested in a portfolio of 36 companies. The firm primarily focuses on early-stage investments, targeting Pre-Seed to Series A stages. Their geographic focus is primarily on Europe and NATO-aligned regions, reflecting their commitment to supporting innovation in these areas. Join Capital has established a reputation for its strategic guidance and extensive network within the defense and technology sectors.
Join Capital invests in early-stage companies primarily within the following sectors: defense, space and aerospace, quantum and advanced computing, AI and cybersecurity, advanced materials and manufacturing, and autonomous systems and robotics. The firm targets investments ranging from €1 million to €5 million at the Pre-Seed to Series A stages, with a strong emphasis on deep tech solutions that possess real intellectual property and a clear competitive edge over legacy systems.
The organization seeks resilient technologies capable of effective scaling, particularly in defense and dual-use sectors. Their investment thesis emphasizes the importance of addressing significant global challenges through innovative technologies, ensuring that portfolio companies are well-positioned to thrive in competitive markets.
Join Capital's notable portfolio includes:
Jan Borgstädt: Founding Partner with extensive experience in venture capital and technology investments. He has a strong background in supporting early-stage companies in the deep tech sector.
Sebastian v. Ribbentrop: Founding Partner known for his expertise in defense technology investments and strategic partnerships within the sector.
Tobias P. Schirmer: Founding Partner with a focus on operational support and scaling strategies for portfolio companies.
Julia Flaig: Principal with a background in technology investments and a keen interest in emerging deep tech solutions.
To pitch Join Capital, startups should visit their website at join.capital or email hello@join.capital. They prefer detailed pitch decks that include information on the technology, market opportunity, and competitive landscape. Response times may vary, but founders are encouraged to provide clear and concise information to facilitate the review process.
Join Capital operates the Ambassador Network, which connects founders with industry leaders to facilitate partnerships and customer acquisition. They also host the Asymmetric Advantage forum, a high-trust conference series for leaders in defense and technology, aimed at fostering collaboration and innovation in these critical sectors.
As of March 4, 2026, Join Capital has received a €50 million commitment from the European Investment Fund for their Fund III, which targets €235 million. The firm has been actively deploying capital across its portfolio of 36 companies, focusing on deep tech investments in defense and dual-use applications. Recent notable portfolio additions include Enclaive, Quadsat, and Kreios Space, reflecting their commitment to foundational technologies.
Q?
What are Join Capital's investment criteria?
Join Capital focuses on early-stage technology companies in sectors such as defense, AI, and robotics, with a strong emphasis on deep tech solutions that have real intellectual property and competitive advantages.
Q?
How can startups apply or pitch to Join Capital?
Startups can pitch to Join Capital through their website at join.capital or by emailing hello@join.capital. They prefer detailed decks that outline the technology and market potential.
Q?
What makes Join Capital different from other VCs?
Join Capital specializes in deep tech investments with a focus on defense and dual-use applications, leveraging a strong network within these sectors to provide strategic guidance and resources to portfolio companies.
Q?
What is the geographic scope of Join Capital's investments?
Join Capital primarily invests in Europe and NATO-aligned regions, reflecting their commitment to supporting innovation in these areas.
Q?
What is the typical check size for investments?
Join Capital typically invests between €1 million and €5 million in early-stage companies.
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