Browserling vs Web Platform Tests

Browserling provides cloud-hosted virtual browsers for checking websites and links across browsers and operating systems. Its listed browser coverage includes Chrome, Firefox, Safari, Edge, Opera, and Internet Explorer on real operating systems, as well as mobile browsers on Android and iOS devices, including iPhones and iPads. Users can inspect pages at different screen sizes, resolutions, and device viewports. SSH tunnels provide access to private or local development sites. Other listed tools include screenshots, file uploads and downloads, geo-browsing, browser extensions, and bookmarklets. A free sandbox opens a URL in a remote isolated browser session. The Live API can embed interactive browsers in applications and supports automation, continuous integration, and SIEM/SOAR workflows. Browserling says each session runs in an isolated virtual machine that is destroyed afterward; traffic uses TLS 1.2 or higher, and URLs, session content, and files are not persistently retained. Paid plans begin at $9 a month billed annually. Listed options include Starter at $9 a month billed annually, Developer at $19 a month billed annually, and Live API at $99 a month as a starting price.

Web Platform Tests is an open-source suite for checking web platform compatibility across browser implementations. Anyone can run tests through the public wpt.live deployment in an internet-enabled browser, or clone the suite for local use on Linux, macOS, or Windows. The suite includes JavaScript API, rendering, crash, WebDriver, and manual tests. Its command-line `wpt` tool runs tests in a selected browser and can produce machine-readable JSON reports and screenshots. It can also save and load expected results for continuous integration and regression tracking. Regularly collected results from a range of browsers are archived at wpt.fyi. Local setup requires Python 3.9 or later and configuration of test domains in the system hosts file. Running tests in multiple browser processes may make results less deterministic and add noise compared with the default single-process mode. The project is free and open source, and documents Windows, macOS, and Linux setup.