Saily in South Korea: strong at the bottom, absent at the top

The range, and what it costs

Saily sells five metered South Korea plans. Every price below was read off Saily's own site on 18 August 2026. The Airalo figures used for comparison were read from Airalo's site on 13 August 2026, and Nomad's from its own site.

Two of the three figures we used to carry were wrong, and interestingly they were wrong in both directions: the 5GB month is a dollar cheaper than we said and the 10GB month a dollar dearer. Neither had been read off Saily. We also did not list the 3GB or 20GB months at all.

No calls or SMS are included on any plan. That is normal for a data eSIM and rarely a problem in Korea, where KakaoTalk carries most communication and works over data like anything else. It does mean you have no Korean number, which occasionally matters for restaurant reservation systems and delivery apps.

The 1GB plan is the best thing here

At $3.99 for 1GB over seven days, Saily has the cheapest South Korea plan we hold from anyone. The closest things to it are Airalo's $4 for 1GB over three days and Nomad's $4 for 1GB over seven — a penny more each.

That combination is more useful than it looks. A long weekend in Seoul on maps, translation and a taxi app rarely breaks 1GB if you use hotel and café wi-fi for anything heavy, and Korean public wi-fi is genuinely everywhere. For a four-day trip, $3.99 is close to free, and Saily lists hotspot as supported even on this tier if you need to pass a signal to a laptop for ten minutes.

The catch is that 1GB is 1GB. Video calls home, a couple of hours of navigation with the screen on, or one YouTube session on the KTX will end it.

Above 1GB, Nomad takes every tier

A dollar, four times over — Nomad under Saily, Saily a cent under Airalo. The Korean market is priced as tightly as any we cover, and none of these gaps should decide a purchase on its own.

The real gap is above 20GB. Saily has no metered plan larger than that, and Nomad's verified 50GB month at $39 — 78 cents a gigabyte — is the cheapest data in the country.

Saily also sells unlimited-data plans for South Korea, at lengths from five to thirty days. We hold no price for any of them, so nothing on this page tells you what Saily's unlimited tier costs. The uncapped figures we can quote are Nomad's verified seven-day at $25 and Airalo's verified seven-day at $29.

Network: nothing published, and a claim withdrawn

An earlier version of this page said our data recorded SKT against Saily's 1GB and 5GB Korean plans. It does not, and it never should have: Saily publishes no host network for South Korea, and it publishes none anywhere. We hold no operator against a single Saily row in any of the forty-eight countries we cover. That SKT attribution has been removed.

None of this should change your decision, because in South Korea it barely can. All three national networks run dense 5G across the populated country, and the differences show up where nobody has good coverage: high mountain trail sections, the smaller outlying islands, and dead spots on some of the older subway lines. No travel eSIM in our data lets you pick which network you land on anyway.

Verdict

Buy Saily in Korea for a short, light trip. The $3.99 week is the cheapest entry into the country we have found and it will genuinely be enough for a lot of visitors.

For anything bigger, Nomad is a dollar cheaper at every size Saily sells, and it is the only provider with a 50GB month. Also worth weighing: a local prepaid SIM at the airport runs about $12 with no ID required, which lands between Saily's 5GB and 10GB plans and gives you a Korean number. The rest of the market is laid out on our South Korea hub.