⚡ API Build Tools

API build tools are solutions used to design, document, test, and maintain application programming interfaces throughout the development lifecycle.

They typically provide API specification formats, interactive documentation, request testing and automation, validation, and collaboration features.

Statistics based on 3.3M+ analyzed websites. About this data

⭐ Most Popular in 2026

The following chart shows the leading API build tools on the web in 2026, based on market share.

The most popular is Swagger with a share of 23.2%, followed by Postman with 0.8%.

Here is a list of tools that are especially popular in certain countries.
Differences between global and country rankings are shown in parentheses.

Below is a more detailed list of 2 API build tools we detect, ranked by their market share.

Available filters: API No-Code

Rank	Name	Market share
1	Swagger Somerville, Massachusetts, United States A suite of open-source tools built around the OpenAPI that enables developers to design, build, and document REST APIs through a standardized, machine- and human-readable interface. FreeOpen source$19+/month	23.2%
2	Postman San Francisco, California, United States A cloud-based collaboration platform for API development that allows users to build, test, design, modify, and document APIs. Free$19+/user/month	0.8%

We evaluate the popularity of technologies based on the number of websites where we detect their usage.
Technologies without a detectable web footprint, and those we do not track, are not reflected in the calculated market share.
This report is based on the analysis of 3,375,483 websites.
We currently track the presence of 25 build tools across the web.
Statistics were last calculated on May 5, 2026.
For more details, see our methodology and disclaimer.