⚡ API Tools

API 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 3.6M+ analyzed websites. About this data

⭐ Most Popular in 2026

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

The most popular is Swagger with a share of 3%, followed by Postman with 0.1% and Scalar with 0.007%.

Below is a more detailed list of 3 API tools we detect, ranked by their market share.

Available filters: API

Rank	Name	Market share
1	Swagger Somerville, Massachusetts, United States A suite of open-source tools built around the OpenAPI Specification that enables developers to design, build, and document REST APIs through a standardized, machine- and human-readable interface. FreeOpen source$19+/month	3%
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	0.1%
3	Scalar Victoria, British Columbia, Canada An open-source platform for creating API documentation with an interactive playground, built around the OpenAPI standard. Free$24+/seat/month	0.007%

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 3,653,460 websites.
We currently track the presence of 46 tools across the web.
Statistics were last calculated on August 21, 2026.
For more details, see our methodology and disclaimer.