Dylibso builds WebAssembly infrastructure and developer tools that enable plugin systems and user-defined code execution in platforms.

Key products include XTP (platform for building plugin systems), Extism (open-source universal plugin system), Chicory (Java-native WebAssembly runtime), and mcp.run (registry of AI tools for the Model Context Protocol).

Business partnerships include Axiom, Figma (using Observe SDK), and engagements with WordPress/Automattic, BigCommerce, Confluent, and others.