Airalo or Roamless 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 0, Roamless on 16; average gap 27%.
Airalo
Ranked higher on 0 of the 16 trips compared★ 4.6 · 47,735 reviewsOfficial website › Airalo (new tab)Roamless
Ranked higher on 16 of the 16 trips compared★ 4.8 · 3,295 reviewsOfficial website › Roamless (new tab)The verdict, by type of trip
- Short stay3 days, 5 GBRoamless€8.89 against €9.50 with Airalo (7% more)
- One week7 days, 5 GBRoamless€8.89 against €9.50 with Airalo (7% more)
- Unlimited7 days, unlimitedRoamless€21.02 against €24.50 with Airalo (17% more)
- Family of 44 travellers, 7 days, 5 GB eachRoamless€35.56 against €38.00 with Airalo (7% 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.
| Trip | Airalo | Roamless |
|---|---|---|
| 3 days | ||
| 1 GB, 3 days | €4.00that's €1.33/day13% more expensive | €3.53that's €1.18/dayRanked higher |
| 5 GB, 3 days | €9.50that's €3.17/day7% more expensive | €8.89that's €2.96/dayRanked higher |
| 10 GB, 3 days | €16.00that's €5.33/day20% more expensive | €13.36that's €4.45/dayRanked higher |
| Unlimited, 3 days | €11.00that's €3.67/day8% more expensive | €10.22that's €3.41/dayRanked higher |
| 7 days | ||
| 1 GB, 7 days | €7.503 GBthat's €1.07/day42% more expensive per GB | €3.531 GBthat's €0.50/dayRanked higher |
| 5 GB, 7 days | €9.50that's €1.36/day7% more expensive | €8.89that's €1.27/dayRanked higher |
| 10 GB, 7 days | €16.00that's €2.29/day20% more expensive | €13.36that's €1.91/dayRanked higher |
| Unlimited, 7 days | €24.50that's €3.50/day17% more expensive | €21.02that's €3.00/dayRanked higher |
| 15 days | ||
| 1 GB, 15 days | €10.005 GBthat's €0.67/day89% more expensive per GB | €3.531 GBthat's €0.24/dayRanked higher |
| 5 GB, 15 days | €10.00that's €0.67/day12% more expensive | €8.89that's €0.59/dayRanked higher |
| 10 GB, 15 days | €16.50that's €1.10/day24% more expensive | €13.36that's €0.89/dayRanked higher |
| Unlimited, 15 days | €44.50that's €2.97/day13% more expensive | €39.42that's €2.63/dayRanked higher |
| 30 days | ||
| 1 GB, 30 days | €10.505 GBthat's €0.35/day98% more expensive per GB | €3.531 GBthat's €0.12/dayRanked higher |
| 5 GB, 30 days | €10.50that's €0.35/day18% more expensive | €8.89that's €0.30/dayRanked higher |
| 10 GB, 30 days | €17.00that's €0.57/day27% more expensive | €13.36that's €0.45/dayRanked higher |
| Unlimited, 30 days | €63.50that's €2.12/day14% more expensive | €55.69that's €1.86/dayRanked higher |
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
- Roamless★ 4.8 · 3,295 reviews
Going further
- Every brand we compare for Japan: the full ranking ›
- Airalo or Roamless, all destinations ›
- Other head-to-heads for Japan: Sirocco vs Airalo · Sirocco vs Roamless · Airalo vs Holafly · Airalo vs Orange Travel · Airalo vs Instabridge · Airalo vs aloSIM · Airalo vs Kolet · Airalo vs Sim Local · Airalo vs Eskimo · Airalo vs eSIM.me · Airalo vs Jetpac · Holafly vs Roamless · Orange Travel vs Roamless · Instabridge vs Roamless · Roamless vs aloSIM · Roamless vs Kolet · Roamless vs Sim Local · Roamless vs Eskimo · Roamless vs eSIM.me · Roamless vs Jetpac
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