In short: Instead of buying a new data eSIM for every trip, Simsalasim gives you unlimited data in 100 countries in one plan for €10 a month. Classic travel eSIMs like Airalo or Holafly only give you data per destination.

  1. Simsalasim – #1.
    Not a single pass but a plan with unlimited data in 100 countries, a German number, and calls, for €10/month. One plan for home and away.
  2. Airalo – the biggest provider.
    Data packs per country or region, no number, from about €4* (1 GB/3 days), unlimited from about €7.50*. Minutes and texts are offered in only a few destinations.
  3. Holafly – unlimited data per destination.
    Data only, often pricier, unlimited from about €3.79* per day, monthly plan from €59.90*.
  4. Saily (by NordVPN) – cheap with security extras.
    Data packs per country, from about €3.49* (1 GB / 7 days), unlimited from about €18.49* (7 days). A US number for local calls is available as an option.
  5. Nomad – flexible data packs.
    Per destination, data only, including unlimited day passes, from about €3.56* (1 GB / 7 days).

Verdict: For a single short trip, a travel eSIM is enough. If you travel often or need a number and calls on the go, Simsalasim is cheaper and simpler.

*Prices and offers can change over time (as of October 2026).