Socket Raises $60M Series C at $1B Valuation to Secure Open-Source Dependencies in the AI Coding Era

Socket closed a $60 million Series C on May 21, 2026, crossing the unicorn threshold at a $1 billion valuation. Thrive Capital led the round, with Andreessen Horowitz, Abstract Ventures, and Capital One Ventures participating. Total funding now stands at $125 million since the company’s 2020 founding.

The timing is notable. Socket’s platform detected the Laravel-Lang supply chain attack that same week — a PHP credential stealer injected into 233 package versions across four widely-used Composer libraries. The back-to-back timing of a major attack and a $1B raise is not coincidence: it reflects exactly the threat environment that has made supply chain security one of the most urgent enterprise security categories.

What Socket actually does

Socket performs automated static and behavioral analysis on open-source packages across npm, PyPI, Maven, and Composer before they are installed. The system flags malware, suspicious install scripts, obfuscated code, and typosquatting attempts in real time — catching malicious packages at the point of integration rather than after the fact. The company says it blocks over 1,000 supply chain attacks per week.

The customer list reads like a directory of AI-native development: Anthropic, xAI, Replit, Cursor, Figma, and Vercel are all paying customers, alongside Fortune 100 companies in financial services and media. That client profile reflects both the seriousness of the threat and who builds the tools most likely to consume open-source dependencies at high velocity.

Why the AI coding boom makes this urgent

AI code assistants — Cursor, GitHub Copilot, Replit Agent — have dramatically accelerated the pace at which developers add open-source dependencies. A developer who once spent an hour evaluating a new library now accepts an AI-generated npm install suggestion in seconds. That compressed decision window is exactly what supply chain attackers exploit.

Socket’s strategy for the next phase targets this problem at the source: building integrations with AI coding tools to analyze packages at the moment of code generation, not just at install time. If an AI assistant is about to suggest a dependency, Socket wants to flag the risk before the suggestion lands in the editor.

The new capital will fund enterprise sales expansion, coverage of additional package registries, and those coding assistant integrations. Socket is betting that securing the AI coding workflow is the next major surface in the supply chain security market — and the week’s events suggest the bet is sound.