Tesonet is a Vilnius-based venture builder and founders' office that invests in, scales, and acquires technology businesses. It targets established companies with traction from late seed and Series A onward, can lead or co-lead investments, and provides hands-on support across product, growth, hiring, legal, finance, and procurement. The firm focuses on software, AI, infrastructure, cybersecurity, privacy and sports tech, with investment geography including Lithuania, the USA, the UK, Israel, Sweden, Denmark, the Netherlands and Latvia.