Saily in South Korea

What does Saily cost in South Korea?

every plan in USD, 2026

Saily sells five fixed buckets, all on a 30-day window except the 1GB, and seven unlimited lengths. The fixed buckets are never the cheapest and never far off. The unlimited ladder, with the biggest daily cap, is the reason to be here.

Prices in USD, checked 2026, before promo codes. The five fixed plans were checked on Saily's own Korea page (saily.com/esim-south-korea/); every plan earns 3% back in Saily credits and no discount was running. The seven unlimited lengths, the "5GB/Day without a speed limit" cap, the "up to 1 Mbps" after it and the hotspot terms were read on the same page. Saily's Terms and support pages say the daily allowance resets at midnight local time.

Saily publishes the largest unlimited cap for Korea, 5GB a day, and the carriers still beat it

the honest unlimited story

No travel eSIM sold for Korea is actually unlimited. Every plan with the word on it is a daily allowance with a throttle behind it, and the only question is whether the seller will tell you the two numbers: how much full speed per day, and how slow it goes afterwards.

Saily publishes the first number, and it is the biggest one anyone we link will commit to: 5GB per day. Airalo prints 3GB. GigSky's Unlimited allows 3.5GB a day. Nomad, unlinked, is 2GB. Yesim and Holafly publish no daily figure at all.

Saily publishes the second number too. Its Korea page says that after the 5GB you get "Unlimited data at up to 1 Mbps" until the allowance resets at midnight local time, enough for messaging and maps, not for video. Airalo prints the same 1 Mbps after 3GB. GigSky does not print a post-cap speed on its Korea page. We have not tested any of them.

Five gigabytes a day is a real amount. It is a full working day on a tethered laptop with video calls, or roughly four to five hours of 720p video, or every Naver Map search, KakaoTalk thread and photo upload a day in Seoul can generate with a film left over. If you actually use it, thirty days works out at 48 cents a gigabyte. GigSky's thirty days, used to its 3.5GB cap, is 41 cents.

The last two rows are the uncomfortable part of this review. Korea is the rare country where the local carriers sell genuinely uncapped tourist eSIMs, for less than Saily, with a Korean 010 number included. We earn nothing on them. The cost is passport registration after you land, at an airport counter or online, and a face-authentication regime that is being phased in through 2026. The carrier page has the details. If you will not do the registration, Saily's 5GB a day is the largest cap you can buy with no ID at all, and GigSky's 3.5GB is the cheapest.

Which Korean network does Saily use?

it does not say

Saily does not disclose which Korean carrier its eSIM rides. Not on its Korea page, not in the technical details, not in its FAQ or Terms, which say: "We reserve the right to select network operators." So the answer is local partner networks, not disclosed by Saily. It is the only one of the four brands we link without a named Korean network: Airalo shows SK Telecom, Yesim lists SK Telecom, and GigSky's plan data lists SK Telecom and KT. SKT is Opensignal's Best Network in Korea for December 2025.

Every Saily price and fair-use term on this page is read from Saily's own pages. Several guides name SK Telecom and KT for Saily; Saily itself does not, so neither do we.

Here is the honest weight of the missing network name in Korea specifically: less than in most countries. Opensignal's Coverage Experience scores were 9.4 for SKT, 9.1 for KT and 8.6 for LG U+, all high. MSIT's official 2025 evaluation averaged 974 Mbps on 5G nationwide and 617 Mbps in rural areas, across the three carriers. In Seoul, Busan and on Jeju you are not going to notice which one Saily picked. On the KTX, nobody's network holds up, so the name would not have helped. The place it matters is a mountain valley, where LG U+ has no 3G fallback and drops to no service faster than the others, and Saily cannot tell you whether that is your network. The full network comparison is here.

Is Saily trustworthy?

4.7 across 32,870 reviews, the only clean one at that level

Saily is run by Nord Security, the company behind NordVPN, and the support operation shows it. Trustpilot 4.7 from 32,870 reviews in 2026, with no warning banner on the profile.

That last clause matters in Korea because the other brand at 4.7, Holafly, carried an active Trustpilot banner on the same date: "Trustpilot is currently working with this business to address past violations of our Guidelines for Businesses and Legal Brand Guidelines. This profile is under active review." Holafly also publishes no daily cap on its unlimited and limits hotspot to 1GB a day. We do not link Holafly, and that banner is a large part of why its rows in our tables come with a footnote.

Among the linkable brands, Airalo sits at 4.2 from 48,959, GigSky at 4.3 from 8,403, and Yesim at 4.3 from 2,996 with a 2026 suspension in its history during a fake-review cleanup, since restored. The gap between 4.7 and 4.2 across tens of thousands of reviews is not noise.

Why this matters more than the numbers suggest: an eSIM fails at the worst possible moment, in the arrivals hall at Incheon at one in the morning. Once the prices are within a dollar of each other, what you are buying is whether someone answers when it does not work. Saily pays us 15%; GigSky pays 20%. We are telling you Saily has the better support record anyway.

Saily against the field for Korea, including the brand we cannot sell

size by size

Ubigi is in this table because it beats Saily on 10GB by five dollars and on 30-day unlimited by twenty-three, and publishes two networks on 5G. We earn nothing on it and reviewed it in full anyway.

² Yesim's Trustpilot score was suspended in 2026 during a fake-review cleanup and has since been restored. All figures checked 2026; Saily's from Saily's own Korea page.

Saily wins the daily cap by a wide margin and the trust column outright. It wins nothing on price: GigSky's Unlimited is cheaper at every length, $10.50 less for a week and $28.50 less for a month, for 1.5GB less a day. Nor on fixed buckets: third at 1GB, second at 3GB, third at 5GB, third at 10GB, third at 20GB, always within a dollar or two, never first. And it is the only one of the four that does not say whose network it is.

Where does Saily work well in Korea?

published maps and traveler reports, not our tests

We have not tested Saily in Korea. What follows is what the government's 2025 measurements and the carriers' own coverage records say about each place, and what Saily's silence about its network costs you there.

Buying and activating Saily for Korea

four minutes, at home

1. Buy on the Saily website or app at home on wifi, and check the currency shows USD before comparing against the tables here. If the Korea page shows you a verification screen, as it once did us, the app is the route around it.
2. Pick the length honestly. Seven unlimited lengths from 5 to 30 days; a week is $26.99. If 3.5GB a day is enough, GigSky Unlimited is $16.49 for the week. For a fixed bucket, 20GB over a month is $29.99, and Yesim's is $2.03 cheaper.
3. Install the profile before you fly. It does not start counting until it connects in Korea. No passport, no registration, no airport counter, which in Korea now means no queue at Incheon and no problem at Jeju, where the counters are gone.
4. On landing: Saily line on for data, home line on for calls with data roaming off. If it will not attach, set network selection to manual and work through SKT, KT and LG U+ in turn, since Saily does not tell you which to expect. Full setup and fixes.

Buy Saily for Korea if, skip it if

the short version

Saily Korea questions

short answers