BNESIM

BNESIM, a UK-based company, offers prepaid eSIMs with refillable data balances that you can spend however you like. You choose between global rate plans or country-specific rates, depending on your itinerary and how you want to optimize costs.

The refill process is quick and in-app, letting you adjust your budget as your trip unfolds. It's a solid fit for budget-conscious travelers who value pricing flexibility.