Every travel eSIM is prepaid. You pay once, you get a fixed amount of data, and the plan expires after a set number of days. No contract, no monthly bill, no cancellation fee.
What separates prepaid providers is everything that happens afterwards: whether you can top up a live eSIM, whether an unused plan is refundable, and what a gigabyte actually costs. HelloRoam ranks first at 4.9/5 overall, with plans from $1.14, top-up on 1,124 of its 1,129 plans and a 180-day refund window on anything unactivated. Airalo covers more ground at 200 destinations.
Here are five prepaid picks for 2026.
Which providers are best for this use case?
| Rank | Provider | Best For | Why |
|---|---|---|---|
| #1 | HelloRoam | Prepaid value and a 180-day refund window | HelloRoam rates 4.9/5 overall across 185 destinations and sells 1,129 prepaid plans, from $1.14 for 1GB over 7 days to $15.99 for 20GB over 30 days. An unactivated eSIM stays refundable for 180 days, so buying months ahead carries no risk. Top-up loads data onto a live eSIM on 1,124 of the 1,129 plans, with no new QR code. Hotspot sharing works on all of them and support answers in 63 languages. |
| #2 | Airalo | Catalogue size and in-app top-up | Airalo covers 200 destinations, the widest catalogue on this list, and rates 4.5/5 overall. Airalo plans run $4.50 for 1GB over 7 days and $26.00 for 10GB over 30 days, a rate of $2.60/GB. In-app top-up adds data to a live plan without a new QR code, and usage tracking shows what is left. The refund window closes at 14 days, against 180 days at HelloRoam. |
| #3 | Nomad eSIM | Budget prepaid on short trips | Nomad covers 120 destinations and prices 1GB at $3.00, 3GB at $8.00, 5GB at $12.00 and 10GB at $20.00 over 30 days. Nomad strips out the extras, including top-up: running out means buying a fresh plan and installing a new QR code. Support answers in 2 languages. For a short trip with a known data ceiling, the arithmetic still works. |
| #4 | Saily | Privacy-first prepaid | Saily rates 4.4/5 overall across 150 destinations and runs on Nord Security's no-log stack, so browsing on shared WiFi stays encrypted. Saily prepaid plans cost $3.49 for 1GB, $8.49 for 3GB and $18.99 for 10GB, a rate of $1.90/GB. Saily answers support in 1 language. An existing NordVPN subscription trims the effective cost of the bundle. |
| #5 | Simly | Simple prepaid with in-app top-up | Simly covers 125 destinations and prices 1GB at $2.99 over 7 days, 3GB at $7.99 and 5GB at $11.99 over 30 days. Simly supports in-app top-up, so a depleted plan takes a tap rather than a reinstall. That pairing of low entry pricing with top-up puts Simly ahead of Nomad for anyone who runs close to the data cap. |
How a prepaid eSIM works, purchase to connection
A prepaid eSIM behaves like a prepaid SIM card with no plastic. You buy a plan, receive a QR code by email or in the provider's app, scan it in your phone's settings, and the profile installs on the device.
The profile then sits dormant until you land and the phone registers on a partner network. That first connection starts the clock. A 7-day plan means 7 calendar days from first connection, not 7 days of active use.
Coverage runs to 185 destinations on that model, and 5G runs on a partner network in 93 of them.
A phone holds several profiles at once. iPhone XR and later store 8 or more, with one or two active at a time. Load a plan for every stop on a multi-country trip before you leave home, then switch between them as you go.
Payment is a single charge with no renewal. No provider on this list asks for a deposit or a credit check. HelloRoam refunds an unactivated eSIM for 180 days, which is the one term that makes buying early safe.
Airalo closes its window at 14 days, and none of the five auto-renews.
What happens when prepaid data runs out
When the allowance reaches zero the connection stops. No overage, no surprise charge, no automatic renewal. Spending stops when the balance does, which is the whole point of prepaid.
What follows depends on the provider. HelloRoam supports top-up on 1,124 of its 1,129 plans: data lands on the live eSIM with no new QR code and no reinstall. Airalo and Simly offer in-app top-up as well.
Nomad and Saily sell a fresh plan instead. That means a new QR code and a new profile, which is awkward on a street corner with no data to complete the purchase. The workaround is a cafe or hotel WiFi connection long enough to buy and install.
Buy a little more than you plan to use. Moving from 3GB at $3.22 to 5GB at $5.22 costs $2.00, a small premium against running dry on arrival day.
At 10GB the spread is wider. The first pick charges $8.26, Saily $18.99, Nomad $20.00 and Airalo $26.00 for the same 30-day window.
Top-up support, provider by provider
Top-up support is the feature that separates prepaid providers in daily use. Adding data to a live profile, with nothing to reinstall, saves time at exactly the moment time is short.
HelloRoam supports it on 1,124 of its 1,129 plans. The 5 plans without it are marked on the plan page before you pay. Data lands on the existing eSIM and the profile stays exactly where it is.
Airalo's in-app flow does the same thing: open the plan, choose an amount, pay, and the data merges into the active profile. Simly offers in-app top-up across its 125 destinations. Roamless works differently again, deducting from a prepaid wallet balance rather than selling fixed data blocks.
Nomad and Saily support neither. A depleted plan on either one means a new purchase and a new QR code. Saily covers 150 destinations and Nomad 120, so the gap shows up often enough to matter on a long trip.
Flexiroam takes a third route with data rollover. Unused data moves into your next purchase, which suits anyone buying a plan every few weeks.
How We Chose
We scored prepaid providers on seven things: price at the 1GB, 3GB, 5GB and 10GB tiers; top-up on a live eSIM; refund terms on an unactivated plan; data expiry rules; low-data warnings; support language coverage; and how many taps a common task costs inside the app. Every price and count comes from each provider's published catalogue, recorded in our provider database and dated May 2026. Refund windows come from each provider's own published terms.
We publish no throughput figures on this page, because no measurement set behind them exists. Top-up behaviour and refund terms carry the heaviest weight in the ranking, because those two are where prepaid providers actually differ once the money has left your account.
Common Mistakes to Avoid
Starting the validity clock days before arrival
Install the profile at home, but leave your home SIM as the active data line until you land. The plan timer starts on first connection in the destination, not on install. A 7-day plan loses a full day for every day you start it early.
Buying a plan with no top-up support and running out mid-trip
Check top-up before paying. HelloRoam supports it on 1,124 of its 1,129 plans and Airalo supports it in-app. On Nomad or Saily, buy 30 to 50% more than you expect to use. The step from 3GB at $3.22 to 5GB at $5.22 costs $2.00.
Ignoring the refund window on a plan bought months ahead
Check how long an unactivated plan stays refundable. HelloRoam holds that open for 180 days, so a trip cancelled in month five still returns the money. Airalo closes the window at 14 days, which covers almost no advance planning.
Mismatching the validity period to the length of the trip
A 7-day plan bought for a 14-day trip dies halfway through. Match validity to the whole stay, not the arrival week. The first pick sells 7-day and 30-day windows, so a 20GB plan at $15.99 runs a full month without a second purchase.
Buyer's Guide
Every travel eSIM is prepaid. The real differences sit in what happens after the purchase, so work through them in this order.
Start with the refund window, because it costs the most when a trip moves. HelloRoam refunds an unactivated eSIM for 180 days. Airalo closes at 14 days.
Buy in January for a June trip and only one of those two still protects your money.
Then check top-up. The first pick supports it on 1,124 of its 1,129 plans, Airalo supports it in-app, and Simly supports it across 125 destinations. Nomad and Saily support neither, so on those two, size up before you travel.
On price, the entry tier tells you most of what you need. HelloRoam charges $1.14 for 1GB over 7 days, Simly $2.99, Nomad $3.00, Saily $3.49 and Airalo $4.50. At 5GB the same order holds: $5.22, then Simly $11.99, Nomad $12.00, Saily $12.49 and Airalo $16.00.
Match validity to the trip. A 7-day plan suits a city break and a 30-day plan suits a long haul. The same 20GB plan runs $15.99 for 30 days.
HelloRoam's Thailand plans reach $0.29/GB.
Install the profile at home over WiFi before you fly. The process is far easier on a familiar network than on airport WiFi after a long flight.
Frequently asked questions
Do prepaid eSIM plans auto-renew?
No. All five providers on this list charge once. When the data runs out or the validity period ends, service stops and nothing further is billed. HelloRoam goes one step further: an unactivated eSIM stays refundable for 180 days, against 14 days at Airalo. To carry on, you buy a new plan or top up the existing one.
Can I buy a prepaid eSIM after I arrive at my destination?
Yes, though buying before departure is far easier. Arriving without a plan means using airport WiFi to purchase and scan the QR code, and airport WiFi often demands registration first. Buy at home instead. The first pick refunds an unactivated eSIM for 180 days, so an early purchase for a trip that later moves costs you nothing.
What happens to unused data when a prepaid plan expires?
Unused data is forfeited at the end of the validity period. Buy a 5GB plan for 7 days, use 2GB, and the other 3GB disappears. Flexiroam is the exception, rolling leftovers into your next purchase. To waste less, size the plan to daily use: the first pick sells 3GB at $3.22 and 5GB at $5.22 over 30 days.
Is a prepaid eSIM the same as a regular eSIM?
Yes. Every consumer travel eSIM is prepaid by design. The phrase means you pay a fixed price upfront for a set data amount over a set number of days. The top-ranked provider runs 1,129 plans on that model across 185 destinations. Roamless is the near-exception, deducting from a prepaid wallet per megabyte rather than selling fixed blocks.
Can I use a prepaid eSIM for voice calls?
Most travel eSIMs are data only, including all 1,129 plans from the first pick. There is no phone number and no traditional voice service attached. YeSIM bundles a virtual number with its plans across 140 destinations. For calls, use WhatsApp, FaceTime or Skype over the eSIM data connection, which costs nothing beyond the data itself.
Which prepaid eSIM supports top-up on the most plans?
HelloRoam supports top-up on 1,124 of its 1,129 plans, so data lands on a live eSIM with no new QR code. Airalo supports in-app top-up too, and Simly offers it across 125 destinations. Nomad and Saily support neither: running out on either one means buying a new plan and installing a new profile.
Can I use a prepaid eSIM on an iPhone?
Yes. Every iPhone from the XR onward runs prepaid e SIM profiles, including the 11, 12, 13, 14, 15 and 16 series. The handset must be carrier-unlocked. Install through Settings, Cellular, Add eSIM, then scan the QR code. The first pick at $1.14 for 1GB and Airalo at $4.50 for 1GB both deliver that code by email.
How does prepaid e-sim pricing compare across providers?
At 1GB, HelloRoam charges $1.14, Simly $2.99, Nomad $3.00, Saily $3.49 and Airalo $4.50. At 10GB it charges $8.26, against Airalo's $26.00, Nomad's $20.00 and Saily's $18.99. The HelloRoam 20GB plan at $15.99 works out to $0.80 per gigabyte, its lowest published rate anywhere in the catalogue.
Can I keep several prepaid eSIMs on one phone?
Yes. Modern handsets store 8 to 12 eSIM profiles at once, with one or two active. Load a plan for every stop before a multi-country trip and switch as you travel. The first pick covers 185 destinations and Airalo 200, so between them almost any route is served. Delete a profile once its 30 days are spent.