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Sirocco 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: Sirocco ranked higher on 13, aloSIM on 2, tied on 1; average gap 13%.

Sirocco Our eSIM

Ranked higher on 13 of the 16 trips comparedno ratingSee Sirocco for Japan ›

aloSIM

Ranked higher on 2 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 €9.00 with Sirocco (29% more)
  • One week7 days, 5 GBTiedTied: €9.00 with both
  • Unlimited7 days, unlimitedSirocco Our eSIM€23.20 against €26.00 with aloSIM (12% more)
  • Family of 44 travellers, 7 days, 5 GB eachSirocco Our eSIM€32.40 against €36.00 with aloSIM (11% 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
TripSirocco Our eSIMaloSIM
3 days
1 GB, 3 days€3.80that's €1.27/dayRanked higher€4.00that's €1.33/day5% more expensive
5 GB, 3 days€9.00that's €3.00/day29% more expensive€7.00that's €2.33/dayRanked higher
10 GB, 3 days€15.20that's €5.07/day9% more expensive€14.00that's €4.67/dayRanked higher
Unlimited, 3 days€10.40that's €3.47/dayRanked higher€11.00that's €3.67/day6% more expensive
7 days
1 GB, 7 days€3.80that's €0.54/dayRanked higher€4.50that's €0.64/day18% more expensive
5 GB, 7 days€9.00that's €1.29/dayTied€9.00that's €1.29/dayTied
10 GB, 7 days€15.20that's €2.17/dayRanked higher€16.00that's €2.29/day5% more expensive
Unlimited, 7 days€23.20that's €3.31/dayRanked higher€26.00that's €3.71/day12% more expensive
15 days
1 GB, 15 days€3.801 GBthat's €0.25/dayRanked higher€7.503 GBthat's €0.50/day32% more expensive per GB
5 GB, 15 days€9.50that's €0.63/dayRanked higher€10.00that's €0.67/day5% more expensive
10 GB, 15 days€15.60that's €1.04/dayRanked higher€17.00that's €1.13/day9% more expensive
Unlimited, 15 days€42.20that's €2.81/dayRanked higher€46.00that's €3.07/day9% more expensive
30 days
1 GB, 30 days€3.801 GBthat's €0.13/dayRanked higher€7.503 GBthat's €0.25/day32% more expensive per GB
5 GB, 30 days€9.90that's €0.33/dayRanked higher€11.00that's €0.37/day11% more expensive
10 GB, 30 days€16.10that's €0.54/dayRanked higher€17.00that's €0.57/day6% more expensive
Unlimited, 30 days€60.30that's €2.01/dayRanked higher€70.00that's €2.33/day16% more expensive

Sirocco is ranked lower on 2 trips: 3 days, 5 GB (€9.00 against €7.00); 3 days, 10 GB (€15.20 against €14.00).

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.

  • Sirocco Our eSIMno rating
  • 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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