Is Yesim any use on a cruise ship?
What Yesim sells, what it works out at per gigabyte, and the specific stretches of a cruise where it is the wrong tool for the job.
Does Yesim work at sea?
Yesim is a Swiss eSIM app from Genesis Group AG, founded in 2019 and based in Zug. The Global Plus Package covers 145 countries, and the wider catalogue reaches past 200. It also runs a page badged “Cruise”. Read its own FAQ, though, and the promise thins out: once at sea, the connection “depends on the partner’s network coverage”. That is a land eSIM in cruise wrapping, not a maritime product.
Prices last confirmed
Who Yesim is for
Dmitri Verbovski and Max Pankratov founded Yesim in 2019, and Genesis Group AG runs the app out of Zug, Switzerland. The company claims more than 4 million users and a 4.7 rating from tens of thousands of ratings. By its own count that is seven-plus years in the market.
The core product is a reseller eSIM linking to local partner networks in more than 200 places. It sells as a country plan, a regional bundle, or the 145-country Global Plus Package. Whichever is bought, it hops between partner networks on its own as you move.
There is a cruise-branded landing page too, plus blog posts aimed at cruise passengers, pointing them at the existing Global Plan or a pay-as-you-go option called “Pay & Fly”. Credit where it is due: the page’s own FAQ does not oversell. It promises a stable connection in ports and coastal areas, and says that further out it depends on whichever partner network happens to reach. That is the same qualified language every land eSIM uses.
What happens when the ship leaves port
Yesim sells nothing ship-based or satellite-backed. Its FAQ says the eSIM “works on most routes, in ports and coastal areas with mobile coverage from our partner networks”, then adds that “out at sea it depends on the partner’s network coverage”. That is shore-network language, and it falls well short of what GigSky, Saily and Maya actually sell. On a cruise this is a port-day eSIM and nothing else. Reliable at the dock, reliable near the coast, then patchy, then gone. The word “cruise” on the landing page does not change the physics.
What Yesim costs, and what that buys
Checked on yesim.app in September 2026, the Global Plus Package spans 145 countries in fixed or unlimited tiers. On the fixed side: 5GB for 30 days is $28.80, and 10GB for 90 days is $46.80, cut 19% from $57.60. The 20GB, 180-day tier at $70.80 carries the Most Popular tag, down 39% from $115.20. Above that, 40GB for a year is $130.80, down 43% from $230.40.
Unlimited runs $78 for 7 days, or $11.15 a day. Fifteen days is $118.80, which works out at $7.92 a day and is cut 29% from $167.22. The term worth noting is the activation window: 180 days from purchase, with the clock starting only when the phone first meets a partner network. Balance top-ups are handled in-app, and buying two or more eSIMs on one order takes 10% off.
The details that matter on a ship
| Coverage | 145 countries on the Global Plus Package; 200+ destinations across the wider catalogue |
|---|---|
| Hotspot / tethering | Depends on the network operator in each destination |
| Data / calls / SMS | Data only |
| Validity | 30 to 365 days depending on the tier; clock starts on first network connection |
| Activation | Must be activated within 180 days of purchase |
| App | Yesim app (iOS/Android) or yesim.app, 1-click install |
| Top-ups | Balance top-up available in-app |
| Refunds | 100% refund guarantee per Yesim’s published refund policy |
| Support | 24/7; average response time cited as roughly 5 minutes |
| Payment | Card in-app; 10% off when buying 2+ eSIMs on one order |
Getting it working before you sail
Plans are bought and installed in the app, either by a one-tap Install eSIM flow or a QR code. Yesim suggests installing before leaving home, so the profile simply waits and connects at the first port. Because validity begins on first connection rather than at purchase, installing early costs nothing off a plan bought for a specific sailing.
Where Yesim shines, and where it does not
- One eSIM covers 145 countries on the Global Plus Package, and it’s competitively priced.
- You get up to 180 days to activate a plan you’ve bought.
- There’s a 100% refund guarantee, plus 24/7 support with a roughly five-minute response time.
- Yesim’s own documentation is upfront that it can’t guarantee sea-day coverage.
- The “Cruise” page markets a land eSIM, not a maritime plan.
- Hotspot support depends on the local network operator, so it varies by country.
- Unlimited plans get fair-use throttled, following the operator’s own policy.
- There’s no genuine at-sea coverage, so you’ll still need a separate maritime plan.
Cruise and ferry plans
The plans database on this site holds cruise, ferry and maritime products only. Yesim publishes none, so there is no plan table on this page. Its regional data plans remain the relevant purchase for port days.
The verdict for cruise passengers
The Global Plus Package is a good, keenly priced land eSIM with genuinely broad reach, and Yesim’s own documentation is honest about where that reach ends. The cruise-branded page sells exactly what the rest of the catalogue sells. On a cruise itinerary it belongs as the port-day half, paired with a real at-sea seller for the time in between. The mistake to avoid is the obvious one: buying it for sea days because the landing page says “cruise”.
What to pair this with for sea days
Whatever you buy here, something on this list has to handle the crossings:
Frequently asked questions
01Does Yesim work on a cruise ship?+
Only alongside. Yesim runs on land networks, so it connects when the ship is docked or hugging a coastline and shows no service the rest of the time. It is half a cruise setup — buy it for the ports and buy something maritime for the crossings.
02Does Yesim’s cruise eSIM really work once the ship is at sea?+
Yesim’s own cruise FAQ says it works in ports and coastal areas with mobile coverage from its partner networks. Performance out at sea depends on that same partner coverage, not a dedicated maritime network. In practice, that means reliable data at the dock. Once the ship is genuinely offshore, expect that data to turn unreliable, then vanish.
03How long can a Yesim eSIM sit unactivated after purchase?+
Up to 180 days from the date you buy it. The plan’s validity period doesn’t start counting down until your phone connects to a partner network. So you can buy well ahead of a cruise without using up any of the plan’s days.
04What is Yesim’s “Pay & Fly” option, and does it suit an uncertain cruise schedule?+
It’s a pay-as-you-go plan that bills you only for the data you actually use, not a fixed bucket. Yesim markets it specifically at travellers worried their cruise itinerary might change. There’s nothing to pause or extend if a port gets added or dropped.
05Does hotspot work on a Yesim eSIM in port?+
It depends on the network operator in that destination, rather than being guaranteed everywhere. Yesim’s own plan details list hotspot as operator-dependent, not universally supported. It’s worth checking for your specific country or region before you rely on it.
Compare Yesim with
- Simbye — A budget eSIM retailer with an open catalog feed and a standing 15% code. Regional land plans for port days.
- Surfroam — A global roaming SIM and eSIM provider with pay-as-you-go style flexibility across many countries. Useful ashore on multi-country itineraries.
- Truely — A comparison-led eSIM seller with transparent per-GB pricing. Land plans only; no cruise or ferry products.
- Wiiline — A referral-driven eSIM store with regional packs and a permanent code. Port-day coverage.