Geometry Venture Development

Geometry Venture Development (Geometri Melek Yatirim Fonu) is a Turkish angel investment fund founded in July 2019 by Melih Efeoglu and based in Istanbul. The fund operates under a rolling fund and syndicate model, dedicated to empowering early-stage technology startups at the problem-solution and go-to-market stages. Efeoglu specializes in cybersecurity, deep tech, and biotech, and the fund's check sizes range from $20,000 to $50,000 per company, with some deals reaching $250,000 as part of syndicated rounds. The team comprises four people and has built a portfolio of approximately 20 companies across Turkey, the United Kingdom, and the United States. Portfolio companies span education, healthtech, AI, cybersecurity, hardware and IoT, virtual reality, and sustainability. Known investments include Enhencer (AI-powered advertising), HoustonBionics (biotech), Sweephy (data platform), Sensgreen (indoor air quality IoT), Scoutli (sports analytics), Postuby (design automation), DatAnchor, Pangea VR (virtual reality), FenixPyre (cybersecurity), Sorbil (educational software, latest investment October 2023), and Barty Digital. One portfolio exit has been recorded: Nebyan Dogal, exited June 2025. Limited partner Uygar Mesudiyeli has supported the fund's formation. Geometry Venture Development's rolling fund and syndicate structure gives the firm flexibility to move quickly on compelling early opportunities and to bring in co-investors at varying check sizes depending on deal requirements. The firm has not reported new investments in 2025, and its last publicly recorded deal dates to October 2023.