Updated September 30, 2026 · TariffCue Editorial Team
BreezeSim vs Simbye
Where BreezeSim and Simbye differ
| Compare |  BreezeSim |  Simbye |
|---|---|---|
| Seller type | Mvno | Reseller |
| Price from | €4.95 | €1.95Lower |
| Reference plan prices | Explorer pass (cheapest 12-month data plan of 30GB or more): 3GB/month, 36GB total, 12 months one-time payment, price not shown on page; cheapest unlimited plan: Global Premium Unlimited 30GB over 5 days, price not shown on page; cheapest plan overall: Europe eSIM from EUR 4.95, 1 month prepaid, 5G where available | Japan 1 GB: EUR 1.95, 1 GB, 7 days, prepaid no contract (cheapest plan overall) | Japan Unlimited: EUR 18.95, unlimited, 7 days, prepaid no contract (cheapest unlimited) | Build Your Own eSIM, app only: 5-50 GB, 30-365 days validity, up to 10 countries (12-month, 30 GB+ line, price set in app) |
| Markets | AL, AR, AU, AT, BE, BR, BG, CA, CL, CN, CO, HR, CY, CZ, DK, EC, EE, FI, FR, DE, GR, GG, HK, HU, IS, IN, ID, IQ, IE, IM, IL, IT, JP, JE, KW, LV, LB, LT, LU, MY, MT, MU, MX, MA, NL, NZ, NO, PK, PY, PE, PH, PL, PT, QA, RO, SA, RS, SG, SK, SI, ZA, KR, ES, SE, CH, TW, TH, TR, UA, AE, GB, US, UY, VE, VNCovers more | CH, GB, PL, TR, US |
| Host network | Not confirmed | NTT Docomo, KDDI/au, SoftBank, Rakuten Mobile (Japan); Orange Holiday Europe (Europe); 700+ partner networks worldwide |
| Unlimited plan price | Not confirmed | €18.95 |
| EU roaming | Not confirmed | Included |
| Multi-line discount | Yes | Not confirmed |
Same on both: SIM-only (Yes), 5G (Yes), eSIM (Yes), Roaming countries (190), Data rollover (No), Hotspot sharing (Yes).
We earn a commission when you sign up through links on this site. Partner status can affect where a brand appears in our rankings.
Key differences
- Simbye scores higher overall: 8.8 vs 8.5.
- Price from is lower at Simbye: €1.95 vs €4.95.
- Support channels: only BreezeSim offers Help centre.
- Contract length: only Simbye offers 1.
- Markets: only BreezeSim offers AL, AR, AU.
Our verdict on each
BreezeSim
BreezeSim suits travellers and expats who want prepaid eSIM data rather than a handset contract, with plans starting at €4.95 and coverage across 190 countries. The trade-off is data that does not roll over and support running on chat, email and help centre, from a company registered in the United Kingdom.
Simbye
Simbye is a prepaid eSIM reseller that suits travellers who want a short single-market data plan instead of a long mobile contract. Its entry plan starts at €1.95, Japan eSIMs run on the major Japanese carriers, and help arrives by chat and email.
Score breakdown
| Area | BreezeSim | Simbye |
|---|---|---|
| Cost | 8.4Entry price of €4.95 sits above the site median of €3.07, ranking 12 of 15. | 8.7HigherThe entry plan is €1.95 and the unlimited plan is €18.95, with EU roaming included across 190 countries. |
| Offer | 9.0HigherRoaming of 190 countries, sim only eSIM with 5G, hotspot sharing and a multi line discount. | 8.9Entry plan starts at €1.95, close to KnowRoaming at $1.75, while unlimited sits higher at €18.95. |
| Trust | 8.0Legal entity Breezesim Limited in GB, founded 2025, with support on chat, email and help centre. | Not confirmed |
By the numbers
| Fact | BreezeSim | Simbye |
|---|---|---|
| Price from | €4.95 | €1.95 |
| Roaming countries | 190 | 190 |
Availability and regulation
| Country | BreezeSim | Simbye |
|---|---|---|
| Headquarters | United Kingdom | United Kingdom |
Sources behind this comparison
BreezeSim
- breezesim.com: 16 facts, checked September 30, 2026
- find-and-update.company-information.service.gov.uk: 1 fact, checked September 30, 2026
Simbye
- simbye.com: 18 facts, checked September 30, 2026
How they place
| Ranking | BreezeSim | Simbye |
|---|---|---|
| Phone plans with eSIM | 6 of 389 | 3 of 389 |
Every fact side by side
| Fact | BreezeSim | Simbye |
|---|---|---|
| Billing | Prepaid | Prepaid |
| Contract length | 12 | 1, 12Covers more |
| Legal entity | Breezesim Limited | Simbye Ltd |
| Headquarters | United Kingdom | United Kingdom |
| Founded | 2025 | Not confirmed |
| Support channels | Chat, Email, Help centreCovers more | Chat, Email |
Where each stands against the rest
| Fact | BreezeSim | Simbye | Median |
|---|---|---|---|
| Price from | €4.95below the median | €1.95lowest quarter | €5 |
| Unlimited plan price | Not confirmed | €18.95below the median | €19.99 |
| Roaming countries | 190highest quarter | 190highest quarter | 100 |
Median across 176 listed providers.
Pros and cons
BreezeSim
Pros
- Sim only plans start at €4.95 on prepaid billing, with no handset in the bundle.
- Coverage spans 190 countries, and eSIM, 5G and hotspot sharing are all included.
- A multi line discount is available for extra lines on the same account.
Cons
- Data rollover is not offered, so unused data is lost when a period ends.
- Support runs on chat, email and help centre only, with no phone line listed for urgent problems.
- The Explorer pass is sold on 12 month terms paid upfront, which is heavy for a short trip.
Simbye
Pros
- The entry Japan plan starts at €1.95, close to KnowRoaming at $1.75.
- Roaming reaches 190 countries and EU roaming is included, so a multi-country trip needs no extra regional pack.
- Japan eSIMs ride NTT Docomo, KDDI/au, SoftBank and Rakuten Mobile, with hotspot sharing available on the same plans.
Cons
- Data rollover is not offered, so an unused allowance expires with the plan it was bought for.
- Support runs on chat and email, with no phone line among the listed channels, so a failed install has no voice route.
- Simbye is a reseller, and the carrier you connect to in Japan belongs to a partner rather than to Simbye itself.
Who each suits
BreezeSim
Who it suits
- Frequent travellers who need data in 190 countries rather than on one home network.
- People who want a sim only eSIM and nothing tied to a handset.
- Households running extra lines, since a multi line discount is available.
Who should look elsewhere
- Buyers chasing the lowest entry price, since co:sim lists $0.99 against BreezeSim's €4.95.
- Shoppers who prefer to buy through a reseller, since ESIMZON and KnowRoaming list reseller and reseller where BreezeSim lists mvno.
Simbye
Who it suits
- Travellers landing in Japan who want data on a major Japanese carrier without taking a handset contract.
- People who want to buy and install an eSIM in the app before departure.
- Readers who want a small prepaid top-up for a single market rather than a monthly allowance.
Who should look elsewhere
- co:sim suits anyone who would rather buy from an MVNO, as co:sim is mvno, than from a reseller working on partner networks.
- KnowRoaming fits a reader whose budget is set in dollars, with an entry price of $1.75.
- ESIMZON suits anyone who wants its named partner set, from AT&T and T-Mobile to Verizon, rather than a Japanese carrier mix.
Current offers
Questions about each
BreezeSim
How much does BreezeSim cost when I start a plan?+
Plans start at €4.95 on prepaid billing, and the cheapest option overall is a Europe eSIM bought as a monthly prepaid plan with 5G where available. There is no separate introductory and renewal split to weigh here: you pay for the plan you choose, while the Explorer pass is sold on 12 month terms and paid upfront.
Do unused data roll into the next period?+
No, data rollover is not offered, so anything left at the end of a period is lost rather than carried into the next one. That matters most on a longer pass such as the Explorer pass sold on 12 month terms, where a quiet month leaves you with less than you paid for. Size the pass to your heaviest travel period and treat the rest as gone.
Simbye
What does the cheapest Simbye plan cost?+
The entry Japan plan starts at €1.95 as a prepaid plan with no contract, so you buy a set amount of data for a fixed trip rather than a monthly allowance. Unlimited data on the same Japanese coverage comes from the Japan Unlimited plan at €18.95. A Build Your Own eSIM can also be set in the app across several markets.
Is there an unlimited data option and what does it cost?+
The Japan Unlimited plan costs €18.95 and carries uncapped data for a short validity window, on 5G networks with hotspot sharing available. Compared with the entry plan at €1.95, the jump is large, so unlimited makes sense for a stretch of heavy use in Japan and less sense for a brief visit.