Seed · Developer Tools · London, United Kingdom · Founded 2022 · 12–17 employees
Founded in 2022 by Yang Li and Alistair Pullen, Cosine is a fully agentic AI software engineer that allows developers to work on multiple tickets simultaneously. Their AI model Genie achieved a breakthrough 30.08% score on SWE-Bench, the industry standard for evaluating AI software engineering skills, significantly outperforming previous best of 19.27%. The Y Combinator-backed startup raised €2.2 million led by Uphonest and SOMA Capital with participation from Lakestar and Focal. Co-founder Yang Li is a Forbes 30 under 30 recipient with experience scaling unicorns including Mobike's growth to 220M MAUs.