Roamless

Roamless takes the pay-as-you-go approach to eSIMs, charging only for the data you actually use. The service offers unlimited-speed data (no throttling when you hit a cap), and any balance you don't spend never expires, so you can return to the US next year and pick up where you left off.

Great for unpredictable travelers who don't know how much data they'll need or want to visit multiple times without committing to large plans each trip. The no-expiration policy particularly rewards occasional travelers who would otherwise lose unused credit.