In short: Saily (by NordSecurity, makers of NordVPN) is a travel eSIM with data packages per country. Calls and texts are available optionally through a US number. With it you can only call locally in the country you are in, not internationally. Saily offers no German number. Simsalasim is a full plan for €10 a month with unlimited data in 100 countries.

FeatureSimsalasimSaily
What you getfull plan: data, minutes, textsdata for one trip (1–20 GB or unlimited), calls optional via a US number
German numberyes, free to bringno
Minutes and textsunlimited (to 50 countries), included in the priceoptional: US number from €1.99*/month plus call and text packages from €0.99*. Local calls only in the country you are in, no international calls; ID verification required
Travel dataunlimited in 100 countriesper country/region, 7 or 30 days
Price€10/monthGermany from €3.99* (1 GB / 7 days)

What speaks for Saily: affordable data packages for a single trip, plus security extras (ad blocker, web protection).

What speaks for Simsalasim: a full plan for home and away, including a number and calls, instead of data only.

Verdict: For a short data trip, Saily can be enough. For everything from one provider, Simsalasim is the better choice.

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