Roamless or Sim Local 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: Roamless ranked higher on 13, Sim Local on 3; average gap 21%.
Roamless
Ranked higher on 13 of the 16 trips compared★ 4.8 · 3,295 reviewsOfficial website › Roamless (new tab)Sim Local
Ranked higher on 3 of the 16 trips compared★ 4.8 · 420 reviewsBadges for the 7 days, 5 GB trip, worked out among the 12 brands we compare, as on the destination page.
The verdict, by type of trip
- Short stay3 days, 5 GBRoamless€8.89 against €9.75 with Sim Local (10% more)
- One week7 days, 5 GBRoamless€8.89 against €9.75 with Sim Local (10% more)
- Unlimited7 days, unlimitedSim Local€16.75 against €21.02 with Roamless (25% more)
- Family of 44 travellers, 7 days, 5 GB eachRoamless€35.56 against €39.00 with Sim Local (10% 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 | Roamless | Sim Local |
|---|---|---|
| 3 days | ||
| 1 GB, 3 days | €3.53that's €1.18/day1% more expensive | €3.50that's €1.17/dayRanked higher |
| 5 GB, 3 days | €8.89that's €2.96/dayRanked higher | €9.75that's €3.25/day10% more expensive |
| 10 GB, 3 days | €13.36that's €4.45/dayRanked higher | €14.25that's €4.75/day7% more expensive |
| Unlimited, 3 days | €10.22that's €3.41/dayRanked higher | €11.50that's €3.83/day13% more expensive |
| 7 days | ||
| 1 GB, 7 days | €3.531 GBthat's €0.50/dayRanked higher | €6.753 GBthat's €0.96/day27% more expensive per GB |
| 5 GB, 7 days | €8.89that's €1.27/dayRanked higher | €9.75that's €1.39/day10% more expensive |
| 10 GB, 7 days | €13.36that's €1.91/dayRanked higher | €14.25that's €2.04/day7% more expensive |
| Unlimited, 7 days | €21.02that's €3.00/day25% more expensive | €16.75that's €2.39/dayRanked higher |
| 15 days | ||
| 1 GB, 15 days | €3.531 GBthat's €0.24/dayRanked higher | €9.755 GBthat's €0.65/day84% more expensive per GB |
| 5 GB, 15 days | €8.89that's €0.59/dayRanked higher | €9.75that's €0.65/day10% more expensive |
| 10 GB, 15 days | €13.36that's €0.89/dayRanked higher | €14.25that's €0.95/day7% more expensive |
| Unlimited, 15 days | €39.42that's €2.63/day15% more expensive | €34.25that's €2.28/dayRanked higher |
| 30 days | ||
| 1 GB, 30 days | €3.531 GBthat's €0.12/dayRanked higher | €9.755 GBthat's €0.33/day84% more expensive per GB |
| 5 GB, 30 days | €8.89that's €0.30/dayRanked higher | €9.75that's €0.33/day10% more expensive |
| 10 GB, 30 days | €13.36that's €0.45/dayRanked higher | €14.25that's €0.48/day7% more expensive |
| Unlimited, 30 days | €55.69that's €1.86/dayRanked higher | €68.25that's €2.28/day23% 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.
- Roamless★ 4.8 · 3,295 reviews
- Sim Local★ 4.8 · 420 reviews
Going further
- Every brand we compare for Japan: the full ranking ›
- Roamless or Sim Local, all destinations ›
- Other head-to-heads for Japan: Sirocco vs Roamless · Sirocco vs Sim Local · Airalo vs Roamless · Airalo vs Sim Local · Holafly vs Roamless · Holafly vs Sim Local · Orange Travel vs Roamless · Orange Travel vs Sim Local · Instabridge vs Roamless · Instabridge vs Sim Local · Roamless vs aloSIM · Roamless vs Kolet · Roamless vs Eskimo · Roamless vs eSIM.me · Roamless vs Jetpac · aloSIM vs Sim Local · Kolet vs Sim Local · Sim Local vs Eskimo · Sim Local vs eSIM.me · Sim Local 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