Ubigi vs GigSky
The specialists’ duel. Network-operator stability against cruise-ship and inflight coverage.
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Ubigi
Telecom-grade eSIM from an actual network operator.
GigSky
The only eSIM that follows you onto the ship.
| Feature | Ubigi | GigSky |
|---|---|---|
| Our score | 4.3 / 5 | 4.0 / 5 |
| Price | $19 | $29 |
| Free plan | No | No |
| Best for | Japan trips, connection stability | Cruises and frequent flyers |
| Category | Specialists | Specialists |
| Provider | Transatel (NTT) | GigSky |
| Visit Ubigi | Visit GigSky |
Our verdict
Pick by itinerary, because these two barely overlap. Ubigi is the land specialist, with NTT-grade network quality, best-in-class Japan coverage, and recurring plans for frequent flyers.
GigSky is the water-and-air specialist, the only mainstream eSIM with working cruise plans and inflight data, niches where its premium pricing competes against $30-a-day ship Wi-Fi rather than against other eSIMs. Land trips? Ubigi. Anything involving a cruise ship? GigSky, and buy before you board.
“The network-grade option. Ubigi is run by Transatel, an NTT company that actually operates mobile infrastructure. Connections feel carrier-stable, Japan coverage is best-in-class, and it works in cars and laptops too. The app is more utilitarian than the startups.”Editorial team, on Ubigi
“The veteran with a unique trick. Data plans that work on cruise ships and on planes, where almost no other eSIM dares. Land prices are higher than the discounters, but at sea GigSky plays nearly alone.”Editorial team, on GigSky
Frequently asked questions
Ubigi or GigSky: which one do I need?
Pick by itinerary, because these two barely overlap. Ubigi is the land specialist, with network-grade stability from an NTT-owned operator, the best Japan coverage we see, and recurring plans for frequent flyers. GigSky is the water and air specialist, with cruise plans that work on the major lines' shipboard networks and inflight data on supported airlines.
Is GigSky expensive compared to a normal eSIM?
On land, yes. Our June 2026 check put GigSky's 5 GB, 30-day Europe plan at about $29 against about $19 at Ubigi, in US dollars, and the cruise packs carry a further maritime premium on top. At sea the comparison flips. Your alternative there is the ship's own Wi-Fi pricing, against which GigSky suddenly reads as reasonable.
Can I buy a cruise eSIM once I am on board?
Buy and install it before you board. GigSky is one of the very few eSIMs that work on shipboard networks, but installing any eSIM profile needs an internet connection, and at sea that is exactly the thing you do not have yet. Set it up over Wi-Fi at home, or in port at the latest, and test it before you sail.