SB21
SB21, also known as Saarbruecker21, is a business angel group based in Berlin. Formed by a network of internet and tech entrepreneurs, the group has been active in investing in young startups and digital companies since 2011. SB21 focuses on early-stage angel investing, providing both capital and support to emerging businesses. The group aims to assist startups in their growth journey by leveraging the experience of its members, who are seasoned founders and operators in the tech industry. Its target audience includes young startups looking for initial funding to develop their ideas and prod
Investing activity
SB21 appears in 1 AI deal tracked by the Lounge deals desk. The rounds are mostly Seed, with a median round size of $6M. The most recent is Elephant Company (Seed, €5M, Jun 2026).
SB21 most often invests alongside EnBW New Ventures, WEPA Ventures, home24 SE and Ventic Ventures, and the companies it backs on Lounge are mostly in AI.
Deals
Frequently asked questions about SB21
What AI companies has SB21 invested in?
SB21's AI investments include Elephant Company. The 1 round on Lounge are listed on this page with amounts, dates and co-investors.
Where is SB21 based?
SB21 is based in Berlin, Berlin, Germany.
What stage does SB21 invest at?
In the rounds tracked on Lounge, SB21 has invested at Seed, with a median round of $6M.
Who does SB21 co-invest with?
SB21's most frequent co-investors on Lounge are EnBW New Ventures (1 deal), WEPA Ventures (1 deal), home24 SE (1 deal) and Ventic Ventures (1 deal).
How can founders reach SB21?
Founders on Lounge can see SB21's contact details in AI Investor Contacts (paid plans), check for a warm introduction through members who worked with the firm under Warm Paths, and add SB21 to their Investor Pipeline to track the conversation.