Sparks

Sparks sells eSIMs as both a wholesale and direct-to-consumer product, with published rates of $0.80 to $1.20 per gigabyte depending on location. Pricing is refreshingly transparent and tied to market rates, not bundles or fixed-day quotas that might leave you with unused data. You only pay for what you consume, with no hidden fees or expiration cliffs.

Heavy data users and those on long trips prefer pay-per-gigabyte models because overage is impossible. The model also suits travellers visiting countries without standard bundle options, where per-gigabyte transparency beats guessing what a fixed plan includes or whether you'll run out mid-trip.