When comparing Geb vs Puppeteer, the Slant community recommends Puppeteer for most people. In the question“What are the best test automation tools for web apps?” Puppeteer is ranked 11th while Geb is ranked 14th.
Ranked in these QuestionsQuestion Ranking
Pro Easy integration with build systems
It's very easy to integrate Geb with any build system.
Pro Asynchronous requests testing is a easier
Asynchronous web pages can easily be tested with Geb as it has built in, easy to use support for testing such operations.
Pro Works great with modern node.js features
Pro Runs a real browser
Unlike the other options here, this is a real browser, just without the GUI parts. This means the quality of the test is much higher, and lets you do things like save to PDF or images.
Pro Actively developed and promoted by Google
Pro Complete API for Chromium included
Chromium tests depend on the same API that Puppeteer gives you access to, so all the features are included
Con Low IDE support
There are not many IDEs that support Geb.
Con Not good for Cross Browser Tests
Since it only tests via Chromium, it won't help you test inconsistencies between browsers like Edge or Safari. There are projects to get around this, but they aren't mature.