TypeScript overtook Python and JavaScript in August 2025 to become the most used language on GitHub. The change marked the most significant language shift in more than a decade. The language grew by more than 1 million contributors in 2025, a 66% year-over-year increase, ending August with 2,636,006 monthly contributors.
Almost all major frontend frameworks now structure projects in TypeScript by default. Next.js 15, Astro 3, SvelteKit 2, Qwik, SolidStart, Angular 18, and Remix generate TypeScript codebases when developers create new projects. Type systems reduce ambiguity and catch large language model errors before production. A 2025 academic study found that 94% of compilation errors generated by LLM were type checking failures. Tools like Vite, ts-node, Bun, and IDE autoconfig hide boilerplate configuration. Among new repositories created in the last twelve months, TypeScript accounted for 5,394,256 projects. That represented a 78% increase from the previous year.
