Updated September 30, 2026 · TariffCue Editorial Team
BreezeSim vs KnowRoaming
Where BreezeSim and KnowRoaming differ
| Compare |  BreezeSim |  KnowRoaming |
|---|---|---|
| Seller type | Mvno | Reseller |
| Price from | €4.95 | $1.75 |
| 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 | USA Unlimited 30 Days: US $68.00, unlimited data, prepaid 30 days (no 12-month 30 GB+ SIM-only plan offered); USA Unlimited 1 Day: US $3.50, unlimited data, prepaid 1 day; USA 1 GB 7 Days: US $3.89, 1 GB, prepaid 7 days |
| Roaming countries | 190 | from 200 |
| Unlimited plan price | Not confirmed | $3.50 |
| 5G | Yes | Not confirmed |
| Data rollover | No | Not confirmed |
| Hotspot sharing | Yes | Not confirmed |
| Multi-line discount | Yes | Not confirmed |
| 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, VN | Not confirmed |
Same on both: SIM-only (Yes), eSIM (Yes).
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Key differences
- KnowRoaming scores higher overall: 9.1 vs 8.5.
- Support channels: only BreezeSim offers Chat, Email.
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.
KnowRoaming
KnowRoaming sells prepaid sim-only eSIM data for travellers who want to buy a plan, use it and walk away, and the USA Unlimited daily plan at $3.50 makes a single heavy-use day cheap. Coverage spans from 200 countries, though the monthly unlimited option is where the range gets expensive.
Score breakdown
| Area | BreezeSim | KnowRoaming |
|---|---|---|
| Cost | 8.4Entry price of €4.95 sits above the site median of €3.07, ranking 12 of 15. | 9.5HigherEntry price of $1.75 and unlimited data at $3.50 put KnowRoaming near the front of both price measures. |
| Offer | 9.0HigherRoaming of 190 countries, sim only eSIM with 5G, hotspot sharing and a multi line discount. | 8.7Sim-only eSIM plans across from 200 countries, sold on prepaid billing by the day. |
| Trust | 8.0Legal entity Breezesim Limited in GB, founded 2025, with support on chat, email and help centre. | Not confirmed |
Positions in our rankings
| Ranking | BreezeSim | KnowRoaming |
|---|---|---|
| Phone plans with eSIM | 6 of 389 | 8 of 389 |
Where each is licensed and available
| Country | BreezeSim | KnowRoaming |
|---|---|---|
| Headquarters | United Kingdom | Not confirmed |
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
KnowRoaming
- knowroaming.com: 9 facts, checked September 30, 2026
Every fact side by side
| Fact | BreezeSim | KnowRoaming |
|---|---|---|
| Billing | Prepaid | Prepaid |
| Contract length | 12 | Not confirmed |
| Legal entity | Breezesim Limited | Not confirmed |
| Headquarters | United Kingdom | Not confirmed |
| Founded | 2025 | Not confirmed |
| Support channels | Chat, Email, Help centreCovers more | Help centre |
Where each stands against the rest
| Fact | BreezeSim | KnowRoaming | Median |
|---|---|---|---|
| Unlimited plan price | Not confirmed | $3.50lowest quarter | $25 |
| Roaming countries | 190highest quarter | from 200highest 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.
KnowRoaming
Pros
- Both sim-only and eSIM are offered, so nothing is posted and no store visit is needed, which suits a traveller already carrying a compatible handset.
- Coverage of from 200 countries lets a multi-stop trip stay with a single provider instead of changing SIMs at each border.
- Billing is prepaid, so every purchase is a set figure with no renewal step and no minimum term to serve out.
Cons
- Support runs on help centre only, so a connection that fails overnight leaves a help centre to sort it out.
- KnowRoaming is a reseller rather than a mobile virtual network operator, so a network fault has to be traced through another party; co:sim and BambooSIM answer as their own operators.
- The monthly USA Unlimited option costs many times the entry figure of $1.75, so a full month of heavy use is the expensive end of the range.
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.
KnowRoaming
Who it suits
- Travellers already holding a compatible handset who want data only, bought digitally with no delivery wait.
- Anyone covering a multi-country trip from a single provider, given coverage of from 200 countries.
- Readers who plan a trip day by day and want unlimited data for a single heavy-use moment rather than a capped monthly allowance.
Who should look elsewhere
- Readers who would rather deal with the network's own operation, since co:sim and BambooSIM run as mobile virtual network operators.
- Shoppers who want the lowest starting figure, since ESIMZON starts at $1 against KnowRoaming's $1.75.
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.
KnowRoaming
What does a KnowRoaming plan cost to start with?+
KnowRoaming's eSIM data plans start at $1.75, the entry figure for its lightest option. It is a set price rather than an introductory rate that renews higher, and billing is prepaid, so a reader can work out the whole spend for a trip before buying anything.
How much does unlimited data cost?+
The USA Unlimited daily plan is $3.50 for a full day of unlimited data, which is the figure most useful for anyone planning a trip day by day. The monthly unlimited option is priced far above that, so longer stays work out better with a smaller allowance topped up alongside it.