Holafly

Holafly stands out for its focus on unlimited-data travel eSIMs. The Spain-founded app, launched in 2018, simplifies international connectivity for travelers who'd rather not manage daily limits or bundle sizes across every destination.

If you're the type to stream, browse, and video-call freely while abroad, Holafly's flat-rate unlimited plans appeal more than metered alternatives. You activate everything in the app and swap plans by country as you travel.