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Airalo or aloSIM for Japan?

2 brands checked on 27/10/2026 · published by Mocom SAS (Sirocco)

Brands compared: Sirocco, Airalo, Holafly, Orange Travel, Instabridge, Roamless, aloSIM, Kolet, Sim Local, Eskimo, eSIM.me and Jetpac

As of 27/10/2026, out of 16 trips compared in Japan: Airalo ranked higher on 5, aloSIM on 6, tied on 5; average gap 10%.

Airalo

Ranked higher on 5 of the 16 trips compared★ 4.6 · 47,735 reviewsOfficial website › Airalo (new tab)

aloSIM

Ranked higher on 6 of the 16 trips compared★ 4.7 · 419 reviewsOfficial website › aloSIM (new tab)

The verdict, by type of trip

  • Short stay3 days, 5 GBaloSIM€7.00 against €9.50 with Airalo (36% more)
  • One week7 days, 5 GBaloSIM€9.00 against €9.50 with Airalo (6% more)
  • Unlimited7 days, unlimitedAiralo€24.50 against €26.00 with aloSIM (6% more)
  • Family of 44 travellers, 7 days, 5 GB eachaloSIM€36.00 against €38.00 with Airalo (6% more)

A written rule, the same for every pair: for each type of trip, the better ranked of the two on price per GB (for unlimited, on price), at the prices we checked. Nothing is picked by hand; customer ratings don't count.

Prices, trip by trip

For each trip, each brand's cheapest plan that covers the duration and the data. In green, the better ranked of the two: price per GB, not counting GB beyond one and a half times the data requested (for unlimited, price). "+x%", how much more the other one costs, per GB when the data differs.

Prices, trip by trip
TripAiraloaloSIM
3 days
1 GB, 3 days€4.00that's €1.33/dayTied€4.00that's €1.33/dayTied
5 GB, 3 days€9.50that's €3.17/day36% more expensive€7.00that's €2.33/dayRanked higher
10 GB, 3 days€16.00that's €5.33/day14% more expensive€14.00that's €4.67/dayRanked higher
Unlimited, 3 days€11.00that's €3.67/dayTied€11.00that's €3.67/dayTied
7 days
1 GB, 7 days€7.503 GBthat's €1.07/day11% more expensive per GB€4.501 GBthat's €0.64/dayRanked higher
5 GB, 7 days€9.50that's €1.36/day6% more expensive€9.00that's €1.29/dayRanked higher
10 GB, 7 days€16.00that's €2.29/dayTied€16.00that's €2.29/dayTied
Unlimited, 7 days€24.50that's €3.50/dayRanked higher€26.00that's €3.71/day6% more expensive
15 days
1 GB, 15 days€10.00that's €0.67/day33% more expensive€7.50that's €0.50/dayRanked higher
5 GB, 15 days€10.00that's €0.67/dayTied€10.00that's €0.67/dayTied
10 GB, 15 days€16.50that's €1.10/dayRanked higher€17.00that's €1.13/day3% more expensive
Unlimited, 15 days€44.50that's €2.97/dayRanked higher€46.00that's €3.07/day3% more expensive
30 days
1 GB, 30 days€10.50that's €0.35/day40% more expensive€7.50that's €0.25/dayRanked higher
5 GB, 30 days€10.50that's €0.35/dayRanked higher€11.00that's €0.37/day5% more expensive
10 GB, 30 days€17.00that's €0.57/dayTied€17.00that's €0.57/dayTied
Unlimited, 30 days€63.50that's €2.12/dayRanked higher€70.00that's €2.33/day10% more expensive
12 brands compared, not an exhaustive listWhy this ranking?

Compared on price per GB: for each trip, each brand's cheapest plan that covers the duration and the data, at the public price we checked, divided by its GB (at most one and a half times the data requested); for unlimited, the price. Average gap: the mean, over the trips compared, of the difference between the two brands relative to the better ranked one.

Not an exhaustive comparison: 12 brands out of the dozens that sell eSIMs. The list of brands compared is in our Methodology.

eSIMeter is published by Mocom SAS, which sells Sirocco: the site is funded by those sales. No other brand pays us.

Customer ratings

App Store United Kingdom, checked on 27/10/2026. Ratings don't count in the verdict.

  • Airalo★ 4.6 · 47,735 reviews
  • aloSIM★ 4.7 · 419 reviews

Going further

A page per destination is only published if both brands have a price for at least 4 of the 16 trips, and if the better ranked one changes with the trip or the average gap reaches 5%. Otherwise they are still compared in the destination's ranking. Methodology

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