All 59 eSIM providers, sorted by what they actually cover

Short answer

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. We list them all so you can see exactly which is which.

Works at sea (7)

🟢 Works at seaOur #1 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.

Port-day eSIM providers
Provider	Coverage	Coupon
abesteSIM	🟡 Ports & land only	`ESIMADVICE5`
Airalo	🟡 Ports & land only	—
AlpineSIM	🟡 Ports & land only	`AFFINCO`
Amigo eSIM	🟡 Ports & land only	`ESIMDUDE`
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 only	`ESIMDUDE5`
eSIM On	🟡 Ports & land only	—
eSIM Thailand	🟡 Ports & land only	—
eSim.sm	🟡 Ports & land only	—
eSIM4Travel	🟡 Ports & land only	`ESIMADVICE`
Esimania	🟡 Ports & land only	—
Esimatic	🟡 Ports & land only	`ESIMDUDE0`
EsimCards	🟡 Ports & land only	—
EsimGlobe	🟡 Ports & land only	—
ESIMI	🟡 Ports & land only	—
eSIMX	🟡 Ports & land only	`ESIMX10`
EuropeEsim	🟡 Ports & land only	—
EzyEsim	🟡 Ports & land only	—
Flysimio	🟡 Ports & land only	`ESIMADVICE10`
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 only	`ESIMDUDE`
Matrix	🟡 Ports & land only	—
MobiMatter	🟡 Ports & land only	`ESIMDUDE`
MoodSim	🟡 Ports & land only	`ESIMADVICE`
Nomad eSIM	🟡 Ports & land only	—
Ohayu	🟡 Ports & land only	`ESIMADVICE`
Orbit Mobile	🟡 Ports & land only	—
PlanetTele	🟡 Ports & land only	—
Qrispy	🟡 Ports & land only	`ESIMADVICE20`
Quibity	🟡 Ports & land only	—
RedteaGO	🟡 Ports & land only	`RTGF95CDO`
Roamic	🟡 Ports & land only	—
Sim Local	🟡 Ports & land only	`ESIMDUDE`
Simbye	🟡 Ports & land only	`ESM15`
Surfroam	🟡 Ports & land only	`ESIMADVICE10`
Truely	🟡 Ports & land only	—
Wiiline	🟡 Ports & land only	`WIIAE63FAFD`
World Esim	🟡 Ports & land only	—
Yaalo	🟡 Ports & land only	—
Yesim	🟡 Ports & land only	—
ZenSim	🟡 Ports & land only	—
Zetexa eSIM	🟡 Ports & land only	—