Best eSIM Europe

The EU's roam-like-at-home rules stop at the EU/EEA border — and that is exactly where a Europe data plan needs checking. Switzerland is in neither the EU nor the EEA, so even many European domestic SIMs treat it as expensive roaming; the United Kingdom left the EU roaming framework after Brexit; and the Western Balkans — Serbia, Bosnia and Herzegovina, Albania, North Macedonia, Montenegro, Kosovo — sit outside the zone entirely.

A travel eSIM does not follow the EU rulebook: its coverage is simply the list of countries in the plan. Before you buy, check that list against your route — a Zurich stopover, a London leg, a Balkan road trip or a finish in Turkey each need to appear by name. Do that once at checkout and the classic border-crossing surprise never reaches your bill.

AviaeSIM sells two families of Europe plans. The wider one covers 41 countries: the 27 EU members — Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Spain and Sweden — plus the United Kingdom, Switzerland, Norway, Iceland, Liechtenstein, Gibraltar, Turkey, Ukraine, Georgia and the Western Balkans: Albania, Bosnia and Herzegovina, Montenegro, North Macedonia and Serbia.

The smaller family covers 28 countries — the 27 EU members plus the United Kingdom — and is priced for trips that stay inside the EU. Both run on the same tier-one networks; the plan card names its exact country list, so a route that includes Switzerland, Turkey, Ukraine or the Balkans needs a 41-country plan.

Not on either list: Russia, Belarus, Moldova, Andorra, Monaco, San Marino, the Faroe Islands and Kosovo. Most of them have their own country eSIM — see Moldova, Andorra, Belarus and Kosovo — which is the better buy for a single-country visit anyway.

The same plan works east of Vienna. Poland, the Czech Republic, Slovakia, Hungary, Romania, Bulgaria and the three Baltic states are on both the 28- and the 41-country lists, and the 41-country plan adds Ukraine, Georgia, Turkey, Serbia, Bosnia and Herzegovina, Montenegro, North Macedonia and Albania — the countries where EU roaming from a home contract usually does not apply and a local SIM means a passport at the counter. Prices for the single-country alternative are on the pages for Poland, the Czech Republic, Hungary, Romania and Serbia.

Every Europe eSIM is data-only: it carries no European phone number and no SMS. Calls run over WhatsApp, FaceTime, Telegram or Signal on the eSIM's data, and your own SIM stays active in the second slot for the calls and bank codes that need your number. That is also why checkout asks for nothing but an email address — the passport registration that applies to a SIM bought in a European shop does not come into it. For heavy use — video calls, streaming, tethering a laptop — the unlimited data eSIM for Europe gives full 4G/5G speed up to 3 GB a day, then 1 Mbps until the 24-hour allowance renews; the fixed-data plans have no daily cap.