How to Compare Travel eSIM Plans: The Price-per-GB Method
Every provider advertises a different plan size for a different number of days, which makes the sticker prices meaningless. Here is a five-minute method that makes any two plans directly comparable — including the costs that are not on the price tag.
Travel eSIM pricing is deliberately hard to compare. One provider sells 3 GB for 7 days, another 5 GB for 10 days, a third sells "unlimited" with a daily cap. The headline numbers do not line up, which is the point.
Here is a method that makes any two plans comparable in about five minutes.
Step 1: convert everything to price per gigabyte
Divide the price by the gigabytes. That is it.
| Plan | Price | Data | Price per GB |
|---|---|---|---|
| A | $8.99 | 3 GB | $3.00 |
| B | $12.99 | 5 GB | $2.60 |
| C | $19.99 | 10 GB | $2.00 |
| D | $29.99 | 20 GB | $1.50 |
Plan A looks cheapest and is the most expensive data on the list. This single step eliminates most bad purchases.
Step 2: check the validity against your trip
A cheap per-gigabyte rate on a 30-day plan is irrelevant if your trip is 10 days and you will use a third of it.
Ask: will I finish this plan inside its validity window? If not, recalculate using the data you will actually use.
Plan D at $29.99 for 20 GB is $1.50/GB — but if you will only use 8 GB, your effective rate is $3.75/GB, which is worse than Plan A.
This is the step almost everyone skips, and it is where most overspending happens.
Step 3: price the stranded data
Multi-country trips make this worse. Four country plans, each partly used, means four abandoned balances.
| Bought | Used | Effective | |
|---|---|---|---|
| Four country plans | 40 GB | 24 GB | You paid for 40 |
| One regional plan | 25 GB | 24 GB | You paid for 25 |
Even if the regional plan's headline rate is 20% worse, it wins comfortably here. The reasoning is in one eSIM for all of Southeast Asia.
Step 4: read the "unlimited" terms before comparing them at all
Unlimited plans cannot be divided by gigabytes, so compare them against your expected usage:
A 7-day unlimited plan at $34.99, if you will use 6 GB, is $5.83 per gigabyte you actually use.
That is frequently worse than a fixed plan — unless the value to you is the absence of a cap rather than the data itself, which is a legitimate reason to pay more. Check the daily allowance and the throttled speed first: "unlimited" travel eSIMs explained.
Step 5: check the costs that are not in the price
Five things that change the real total:
1. Does the country list actually cover your route? A cheap plan that excludes one of your stops is not cheap. Especially relevant in Europe and the Balkans.
2. Can you top up, and at what rate? A plan you can extend lets you buy smaller with confidence. One you cannot forces over-buying. See top up or buy a new eSIM.
3. Is tethering included at full speed? If you work from a laptop, a hotspot restriction makes the plan unusable for you.
4. When does validity start? On activation is normal and good. On purchase means a plan bought early is already burning.
5. What happens if it does not work? A refund-or-replace guarantee has real monetary value, because the downside case is being offline in an unfamiliar country. Ours is set out in the refund policy.
A worked example
Ten days in Thailand, expecting about 8 GB.
| Plan | Price | Data | Days | Price/GB | Effective (8 GB used) |
|---|---|---|---|---|---|
| 5 GB / 15 days | $12.99 | 5 GB | 15 | $2.60 | Runs out — needs a top-up |
| 10 GB / 15 days | $19.99 | 10 GB | 15 | $2.00 | $2.50/GB used |
| 20 GB / 30 days | $29.99 | 20 GB | 30 | $1.50 | $3.75/GB used |
| Unlimited / 10 days | $39.99 | — | 10 | — | $5.00/GB used |
The 10 GB plan wins — not because it has the best headline rate, but because it is the one sized to the trip. That is the whole method in one table.
(Figures above are illustrative, for showing the arithmetic. Live prices for every destination are on the destination pages.)
FAQ
Is the cheapest per gigabyte always best? No — the cheapest per gigabyte you actually use is best. Sizing beats rate.
Should I always buy the biggest plan? No. Buy slightly under your estimate and top up. Over-buying is the most common way to overpay.
How do I estimate my usage? Start with how much data do you need, then cut it with 23 ways to use less data abroad.
Do prices vary by country? Yes, substantially — wholesale costs differ enormously between markets. Compare within a destination, not across.
The bottom line
Divide price by gigabytes, then re-divide by the gigabytes you will actually use, then check the country list, the top-up option and the refund policy. Five minutes of arithmetic beats every "best eSIM" list on the internet — including ours. See the live per-destination pricing on the destinations page.
