Saily in South Korea

Every Saily Korea plan USD via esimdb, checked September 2026

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

Prices in USD, checked September 7, 2026, before promo codes. Saily's own Korea page could not be read on that date (Cloudflare challenge), so every figure in this table is esimdb's listing of Saily's Korea plans. We will re-verify against Saily's page at the first monthly refresh and note the date here. Saily has no 7-day unlimited for Korea; a one-week trip buys the 10-day at $34.99.

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 sells 3.5GB-a-day packs with the cap in the name. Nomad, unlinked, is 2GB. Yesim and Holafly publish no daily figure at all.

The second number is where Saily goes quiet. Its own fair-use post describes the slowdown as 1 Mbps or less; esimdb's listing of the Korea plan says 1 kbps, which is a thousand times slower. Those cannot both be right, we could not load Saily's Korea page to settle it, and we have not tested it. So the post-cap speed on this page is marked unverified. Airalo prints 1 Mbps and is the only linkable brand that commits to a throttle speed.

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, the cheapest full-speed data on this site.

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.

The two things Saily will not tell you about Korea the network, and the page itself

Saily publishes nothing about which Korean carrier its eSIM rides. Not SK Telecom, not KT, not LG U+. Of the four brands we link, only Airalo names a network, and that network is SKT, Opensignal's Best Network in Korea for December 2025.

The second silence is newer. On September 7, 2026 Saily's own Korea page returned a Cloudflare challenge instead of a plan list, from a normal residential connection. That is why every Saily price on this site carries the esimdb label. It is probably a bot-protection setting rather than anything sinister, but a brand whose page we could not read is a brand whose prices we cannot vouch for first-hand, and we would rather say that than paper over it.

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.

The 4.7 across 30,662 reviews is the best trust record on this site and 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 30,662 reviews on September 7, 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 4.1 from 42,273, GigSky at 4.3 from 6,288, and Yesim at 4.3 from 2,943 with a 2026 suspension in its history during a fake-review cleanup, since restored. The gap between 4.7 and 4.1 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. 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 September 7, 2026; Saily's from esimdb.

Saily wins the daily cap by a wide margin and the trust column outright. It wins nothing 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 loses the column this site cares about most, because it will not say whose network it is.

What an unnamed network means for Saily from Seoul to the Ulleungdo ferry 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 did us, the app is the route around it.
2. Pick the length honestly. Six unlimited lengths from 5 to 30 days, but no 7-day: a week buys the 10-day at $34.99. 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