Head-to-head
Ubigi vs GigSky
The specialists’ duel: network-operator stability against cruise-ship and inflight coverage.
Niche heroes
UbigiTransatel (NTT)
Ubigi
Telecom-grade eSIM from an actual network operator.
Niche heroes
GigSkyGigSky
GigSky
The only eSIM that follows you onto the ship.
UbigiGigSky
Our score4.3 / 54.0 / 5
Price$19$29
Free planNoNo
Best forJapan trips, connection stabilityCruises and frequent flyers
CategorySpecialistsSpecialists
ProviderTransatel (NTT)GigSky
Our verdict
Pick by itinerary, because these two barely overlap. Ubigi is the land specialist: 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