London, UKFounded 202212+ employeesPrivate
$3.5M raisedSeed· last: series unknown (Jan 2026)· 4 rounds
Backed by(9 investors)
Cosine is an AI Co-developer, and you can ask complex coding questions, get explanations about features, and plan new code just by asking our AI in plain English TLDR: Cosine is an AI knowledge engine that understands your codebase better than you do, currently available in the browser, and as a VS Code extension. It supports 50+ coding languages, allowing developers to ask any question about their codebase, get explanations about any feature and get suggestions about how to write new code.
Founders
YC W23
Hiring Pitch
Cosine is a fully agentic SWE that allows you to instantly work on every single ticket at once, asynchronously.
Open Positions at Cosine (5 Jobs)
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