Several countries: one eSIM or one each?
A regional pack covers a whole group of destinations with a single profile. Buying per country is usually cheaper per gigabyte. Which wins depends less on how many borders you cross than on how the trip is shaped.
What a regional pack actually is
It is one profile that works across every destination in a defined group — install it once, and it keeps working as you move between them without you touching anything. We sell packs from two destinations up to global ones covering more than a hundred. Each pack page lists exactly which destinations are inside it, because the group is fixed: a pack that does not include a country you are visiting will not connect there, however close by it looks on a map.
When one pack is the right answer
Take the pack when the trip moves. A rail route through several European countries, a work trip with three stops in a fortnight, a cruise or a road trip across borders — in all of these the alternative is buying a separate plan for each stop, installing each one, and remembering to switch. Any of those steps can be forgotten in an airport, and being offline is precisely when buying a replacement is hardest. One profile removes the whole class of problem.
When separate plans are better
Buy per country when the trip is really one destination with a short detour. Two weeks in one country and a weekend across the border is not a multi-country trip: a country plan for the fortnight plus a small plan for the weekend almost always costs less than a regional pack sized for both. Country plans are also priced per destination, so somewhere inexpensive stays inexpensive — a regional price is an average, and averages are paid for by whoever visits the cheap end of the group.
How to work it out in a minute
Open the pack page for your region and note its price and gigabytes. Then open the country pages for the destinations you will actually spend nights in, and add up plans of the size you would buy for each. Compare the two totals. Then add a judgement to the cheaper one: if the separate plans win by a small margin, the pack is often still worth it for not having to install anything mid-trip. If they win by a wide one, take the plans.
Things that hold either way
Validity starts when the eSIM first connects to a network in one of the covered destinations, not when you buy or install it — so a pack bought a week early loses nothing. Both kinds are data only: your own SIM keeps handling calls and texts. And a phone can hold several profiles at once, so buying a pack now does not stop you adding a country plan later if you run out.