GigSky

GigSky was founded in Silicon Valley in 2010 and has built a catalog covering more than 200 countries and regions. For mainland China, it provides a data-only eSIM option alongside its massive geographic range and a single all-in-one World plan spanning 172 destinations.

The company's breadth is its strength, especially if you're a frequent international traveler needing coverage across many regions. A single account and app handle all your global connectivity needs.