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All 59 eSIM providers, sorted by what they actually cover

All 59, sorted by the only thing that matters once you leave the quay: whether the signal follows you out there, or stops dead at the harbour wall.

How the providers compare

Only seven of these work at sea, and all of them resell one of just two wholesale maritime networks. GigSky, Saily, Maya.net, OneRoam, eSIM.dog, Voye Global and Red Bull MOBILE eSIM sell genuine maritime plans. The other 52 are ordinary travel eSIM providers — excellent for port days, useless once the ship clears the coast. Every one is listed here so you can see exactly which is which.

Works at sea (7)

🟢 Works at seaTop pick
GigSky

The only eSIM provider selling true maritime data across 290+ cruise ships, with "Cruise + Land" plans that hand off between the ship's at-sea network and local networks in port. It is also the only brand in the market with ferry-branded plans (Brittany Ferries, Color Line, DFDS, Stena Line) and a free 100 MB trial.

Code ESIMDUDE
🟢 Works at sea
Saily

Nord Security's travel eSIM brand, which added a dedicated Cruise tab in June 2026 covering 28 cruise and ferry operators (only one of which, P&O Ferries, is a ferry line). Its at-sea pricing is the keenest per gigabyte we track, but the plans activate only beyond 12 nautical miles — they do nothing in port, so pair one with a regular regional eSIM.

Code ESIMDUDE
🟢 Works at sea
Maya.net

Maya sells a "Global + Cruise" unlimited plan in 3, 7, 14 and 30-day windows that bundles worldwide land coverage with at-sea data on Carnival, Celebrity, Disney, NCL, Princess, Royal Caribbean and Virgin Voyages ships. It is the simplest option for anyone who refuses to think about data allowances.

🟢 Works at sea
OneRoam

Unlimited data on one eSIM that covers both the ship at sea and 140+ countries on land, across 200+ vessels. Priced by duration rather than gigabytes, and the only provider we list that quotes in GBP, EUR and CAD as well as dollars.

🟢 Works at sea
eSIM.dog

Sells both a huge land catalog at keen per-GB rates and — unusually — a genuine Telenor Maritime satellite plan that works at sea on 150+ named ships and ferries. The cheapest way onto a ship network at $14.49 for 100MB, and the most expensive per gigabyte beyond that.

Code DUDEADVICE5
🟢 Works at sea
Voye Global

A global connectivity brand whose Cruise eSIM rides the same Cellular at Sea maritime network as GigSky and Saily, across 220+ ships and 27 lines. It is sea-only by design — it does not connect in port — and it has no free trial, so it reads as a cheaper Saily rather than as a GigSky alternative.

🟢 Works at sea
Red Bull MOBILE eSIM

Telenor Maritime exclusive consumer partner since April 2024, covering 150+ named vessels that the Cellular at Sea providers largely miss — AIDA, Costa, P&O, Cunard, TUI/Marella and the Stena, DFDS, Brittany Ferries and Color Line fleets. Its 250 MB plan at EUR 5 is the cheapest way onto a ship network anywhere; the allowances are correspondingly small.

Port-day providers (52)

These have no maritime product and never claim one. Any of them will cover you ashore; which is cheapest depends on the countries on your itinerary.

ProviderCoverageCoupon
abesteSIM🟡 Ports & land onlyESIMADVICE5
Airalo🟡 Ports & land only—
AlpineSIM🟡 Ports & land onlyAFFINCO
Amigo eSIM🟡 Ports & land onlyESIMDUDE
Billion Connect🟡 Ports & land only—
Bloomy eSIM🟡 Ports & land only—
BreezeSim🟡 Ports & land only—
ByteSIM🟡 Ports & land only—
ChillSim🟡 Ports & land only—
CloudOn eSIM🟡 Ports & land onlyESIMDUDE5
eSIM On🟡 Ports & land only—
eSIM Thailand🟡 Ports & land only—
eSim.sm🟡 Ports & land only—
eSIM4Travel🟡 Ports & land onlyESIMADVICE
Esimania🟡 Ports & land only—
Esimatic🟡 Ports & land onlyESIMDUDE0
EsimCards🟡 Ports & land only—
EsimGlobe🟡 Ports & land only—
ESIMI🟡 Ports & land only—
eSIMX🟡 Ports & land onlyESIMX10
EuropeEsim🟡 Ports & land only—
EzyEsim🟡 Ports & land only—
Flysimio🟡 Ports & land onlyESIMADVICE10
Gigago🟡 Ports & land only—
GoMoWorld🟡 Ports & land only—
InstaBridge eSIM🟡 Ports & land only—
iRoamly🟡 Ports & land only—
Japan Wireless🟡 Ports & land only—
Jetpac🟡 Ports & land only—
LatAm Travellers🟡 Ports & land only—
LotsoTravel🟡 Ports & land onlyESIMDUDE
Matrix🟡 Ports & land only—
MobiMatter🟡 Ports & land onlyESIMDUDE
MoodSim🟡 Ports & land onlyESIMADVICE
Nomad eSIM🟡 Ports & land only—
Ohayu🟡 Ports & land onlyESIMADVICE
Orbit Mobile🟡 Ports & land only—
PlanetTele🟡 Ports & land only—
Qrispy🟡 Ports & land onlyESIMADVICE20
Quibity🟡 Ports & land only—
RedteaGO🟡 Ports & land onlyRTGF95CDO
Roamic🟡 Ports & land only—
Sim Local🟡 Ports & land onlyESIMDUDE
Simbye🟡 Ports & land onlyESM15
Surfroam🟡 Ports & land onlyESIMADVICE10
Truely🟡 Ports & land only—
Wiiline🟡 Ports & land onlyWIIAE63FAFD
World Esim🟡 Ports & land only—
Yaalo🟡 Ports & land only—
Yesim🟡 Ports & land only—
ZenSim🟡 Ports & land only—
Zetexa eSIM🟡 Ports & land only—