eSIM.io
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eSIM.io uses a single profile (OneSim) that stays on your device across all 200+ supported destinations. You pay for data consumed rather than time-based buckets, with rates starting at €0.69/GB depending on region. 5G connectivity activates automatically where networks support it, and you'll see per-country coverage maps before purchasing to confirm availability on your route.
Works well for short trips and travelers who cross multiple countries in a month because you're not buying separate plans per destination. The pay-as-you-go model suits occasional users better than frequent fliers with predictable high usage. Compare to Jetpac if you want regional pricing bundles upfront, or Esimatic if you prefer no identity verification requirements.