BrowserStack acquires Y Combinator-backed Requestly to strengthen developer tools stack

BrowserStack has acquired Requestly, a developer tool for HTTP interception, application programming interface (API) mocking, and debugging, as it looks to expand its offerings for frontend developers.

The terms of the deal were not disclosed. Backed by Y Combinator and Peak XV (formerly Sequoia Capital India and SEA), Requestly is used by more than 200,000 developers across over 10,000 companies. The tool allows frontend developers to intercept, modify, and mock PI requests directly in the browser, helping them build and test applications without waiting for backend systems to be ready.

“Requestly was born from our own frustration of wasted developer hours due to broken workflows in end-to-end code testing caused by dependency on the environment and backend team," said Sachin Jain, founder of Requestly. "Joining BrowserStack means we can maintain our core values while accelerating our roadmap to address even more developer pain points.”


The acquisition adds to Accel-backed BrowserStack’s efforts to strengthen its developer productivity suite by integrating Requestly’s open-source solution, the company said on Tuesday.

“We're excited to accelerate Requestly's disruption of the API mocking and interception space while preserving its open-source foundation. We're backing Requestly's growth while maintaining what developers love about it—this will help them innovate faster in a space ready for fresh thinking,” said Ritesh Arora, cofounder and CEO of BrowserStack.

With mobile development on the rise, Requestly plans to extend its capabilities to support HTTP interception and mocking on Android emulators and iOS simulators. It will continue to operate as an open-source tool backed by BrowserStack.

According to Tracxn, Requestly has raised a total of $125,000 in funding to date.

In February, BrowserStack launched an AI-powered testing platform to consolidate the entire quality assurance (QA) workflow—from planning and execution to debugging—under one roof, helping teams deliver applications faster.

Founded in 2011 by Ritesh Arora and Nakul Aggarwal, BrowserStack provides a cloud-based platform for developers to test websites and mobile apps across a wide range of devices, browsers, and operating systems. Its clients include Amazon, Nvidia, MongoDB, Microsoft, and X (formerly Twitter).