Major Companies Are Switching to TypeScript: The Main Trend of 2025

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Major Companies Are Switching to TypeScript: The Main Trend of 2025

2025 has become a turning point for web development: more and more tech giants and large corporations are announcing a full or partial migration of their projects to TypeScript. This language, which is a strictly typed superset of JavaScript, has long won the love of developers, but its mass adoption at the enterprise level has now become a real trend.

Why TypeScript?

TypeScript, created by Microsoft in 2012, offers developers static typing, improved IDE support, and early error detection. Unlike JavaScript, where bugs often surface at runtime, TypeScript allows you to catch them at the compilation stage. This is critically important for large projects with millions of lines of code.

According to the 2025 Stack Overflow survey, TypeScript ranked second in popularity among programming languages (after Rust), surpassing Python and Java. 72% of respondents stated that they plan to use TypeScript in commercial projects within the next two years.

Company Case Studies

Google — migrated its internal Angular tool to TypeScript back in 2023, and in 2025 began migrating part of its Google Ads server-side services from Go to TypeScript.
Microsoft — completely rewrote the frontend of Visual Studio Code in TypeScript, and also updated Office 365 libraries.
Airbnb — announced in early 2025 the completion of a three-year migration of all client applications from JavaScript Flow to TypeScript, reducing the number of errors by 47%.
Slack — uses TypeScript for backend microservices, which has improved code readability and accelerated the onboarding of new developers.
Shopify — migrated the main part of its platform (React + Node.js) to TypeScript, noting a 30% increase in team productivity.

Statistics and Figures

According to the State of JS 2025 report, the share of projects using TypeScript has grown to 68% among surveyed developers. At the same time, 55% of companies with more than 1,000 employees have already implemented TypeScript in their main stack. The average reduction in runtime errors when switching to TypeScript is 35–50%.

Why This Matters for the Python Community

Although PythonLib is dedicated to Python, the TypeScript trend directly affects the ecosystem: TypeScript is increasingly used for writing asynchronous microservices that interact with Python backends. For example, many startups choose the FastAPI (Python) + TypeScript (frontend/API Gateway) stack. Additionally, tools like Pyright and Pydantic are inspired by TypeScript's ideas, bringing the two languages closer together.

Forecast for 2026

Experts expect that by the end of 2025, more than 80% of large web projects will use TypeScript, at least partially. The growing popularity is also supported by the release of new versions of the language (TypeScript 5.8) with improved compiler performance and support for isolated types. For developers who are not yet familiar with TypeScript, 2025 is the best time to learn this tool.

Stay tuned for updates on PythonLib — we will be publishing detailed guides on integrating TypeScript with Python projects.