Safari Technology Preview is a mix of the stability we expect from Safari with the iterative energy of WebKit nightly builds. Apple tells TNW it will update Safari Technology Preview every two weeks or so, and will sign and validate each release.
Apple also says it will look to WebKit nightlies for inspiration for Safari Technology Preview, but that it won’t necessarily work the tech found in those nightlies into the new browser. It’s meant for Web developers who want to build for incoming standard technology, not as a stable version of WebKit nightlies.
To that, it’s easy to consider Apple’s WebKit/Safari builds as competitive with Chrome’s channels. the difference is that the Chrome beta and developer channels are more like playgrounds, while Safari Technology Preview is meant as a forward-facing browser for what’s on the horizon.
Safari Technology Preview will be hosted on Apple’s developer Website, but you don’t have to be a registered developer to download it. Apple is also encouraging Web developers to use Bug Reporter to send feedback about Safari Technology Preview to let them know what is and isn’t working.