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This guide is built from pricing, not from a trip. In September 2026 we read the Greece page of every eSIM provider we track — 14 of them — and recorded what each one actually charges, which Greek network it says it uses, and which plans it still sells. We haven't run speed tests on a Santorini clifftop, and this guide says so rather than dressing up marketing claims as firsthand experience.
What the numbers show is a market with an unusually wide spread. Buy 10 GB for a Greece trip and you'll pay anywhere from $11.99 to $22.99 — a 92% difference for identical data on the same island. Greece runs on three networks — Cosmote, Vodafone, and Nova — and only one provider in this comparison gives you access to all three. Below is what each charges, which network it rides, and where island-hopping changes the answer.
Before you buy: Greece is in the EU, Turkey is not
Pairing the Greek islands with a few days in Istanbul or Bodrum is one of the most common Aegean itineraries — and one of the most common eSIM mistakes. Turkey is excluded from essentially every EU regional plan, so a Greece or EU eSIM stops working the moment you cross. Buy two country plans, or a bundle that names both. Jump to that section →
Our Top 3 eSIM Picks for Greece
Ubigi
Ubigi is the strongest all-round pick for Greece: it is cheap at every size, and it names its network. 10 GB for $12 over 30 days is $1.20/GB, and it scales better than anyone: 25 GB is $22 and 50 GB is $32 ($0.64/GB). Its unlimited plans are the cheapest of any mainstream provider here — $22 for a week and $55 for a month. Ubigi runs on Nova.
Best for: Almost everyone — the mainland-plus-an-island trip most visitors actually take. Two honest tradeoffs: Ubigi has no plan below 3 GB at $6, so it's the wrong choice for a two-day stopover, and its app is more utilitarian than Airalo's. It is also a single-network eSIM, which matters on the smaller islands — see pick #2.
View Ubigi Greece Plans→TooSim
TooSim is the only provider in this comparison that gives you all three Greek networks — Cosmote, Vodafone, and Nova — with manual switching in your phone settings. That is a genuine Greece-specific advantage rather than a marketing line: coverage quality on the smaller Cyclades and Dodecanese islands varies by operator, and being able to try a different network beats being locked to whichever one your reseller chose. Pricing is mid-pack and fair: 10 GB is $14.99 ($1.50/GB), 5 GB is $9.99, and 1 GB for 7 days is $3.99.
Best for: Multi-island itineraries, anyone staying somewhere smaller than Santorini or Mykonos, and travelers who specifically want Cosmote — the fastest Greek network on published speed data, and the one almost no other travel eSIM offers. The tradeoff: TooSim sells no unlimited plan for Greece, and its 50 GB at $51.99 is poor value against Nomad's or Ubigi's.
View TooSim Greece Plans→Nomad
Nomad names its networks directly — Nova and Vodafone, two of the three — and sells the single cheapest gigabyte in the entire Greece market: 50 GB for $31, or $0.62/GB. Its 20 GB at $21 ($1.05/GB) is the best mid-large plan going, and 1 GB for 7 days is $4.
Best for: Long stays, remote workers, laptop tethering, and anyone on a month-long island circuit where 20–50 GB is a realistic target. Below 10 GB it loses its edge — at 10 GB for $18 it is 50% more than Breeze and Ubigi charge — so buy Nomad when you're buying big.
View Nomad Greece Plans→Provider Comparison
How the major providers stack up for Greece. Every price here was read directly off the provider's own Greece page in September 2026:
The same 10 GB, six different prices
Because 10 GB over 30 days is the plan most Greece visitors actually want, it's the cleanest way to see the spread:
Breeze is technically the cheapest 10 GB in Greece, by one cent — and it's the outright cheapest at 5 GB ($6.99) too, where nobody else gets under $9.99. We still lead with Ubigi because Breeze doesn't disclose which Greek network it uses, and because Ubigi wins decisively everywhere above 10 GB. If you want the lowest possible price on a small plan and don't care which tower you're on, Breeze is the honest answer.
Holafly doesn't sell fixed-data plans, so it isn't in this table. Its Greece pricing is identical to what we recorded for Ireland, the UK, and Australia, because Holafly charges flat global rates rather than pricing per destination — which makes it uncompetitive in a market this cheap. Its 30-day unlimited at $73.90 is the most expensive unlimited plan sold for Greece.
Which plan should you choose?
For a week or two split between Athens and the islands, 10 GB is the right size and $12 from Ubigi is the right price — with more options on our full Greece comparison. Staying on smaller islands? TooSim's access to all three networks is worth the extra $3. Tethering a laptop for a month? Nomad's 50 GB at $0.62/GB is the cheapest data in the country. Just passing through for a weekend? SimOptions sells 1 GB for $1.50 and 3 GB for $2.50 on 3-day validity, which nothing else comes close to. And if Greece is one stop on a wider European trip, a regional EU plan will usually beat stacking country plans.
Island-Hopping Changes the Answer
Most destination guides treat a country as one coverage area. Greece doesn't work that way. A trip here typically means a mainland city, a ferry, and one or more islands — and each leg puts a different demand on your data.
On the mainland, coverage is a non-issue. Athens and Thessaloniki have dense 5G on all three networks, and any provider in this comparison will serve you well. Buy on price.
On the ferries, nothing works reliably and no provider can fix it. Short hops stay within reach of coastal towers at either end; long crossings like Piraeus to Crete spend hours genuinely out of range. Download your ferry tickets, offline maps, and anything you plan to read before you board — this is the single most useful piece of Greece connectivity advice, and it has nothing to do with which eSIM you bought.
On the islandsis where provider choice actually matters. The big names — Santorini, Mykonos, Crete, Rhodes, Corfu, Paros, Naxos — are well covered on all three networks. The smaller Cyclades and Dodecanese are not uniformly covered, and which operator has the better signal genuinely differs from island to island and village to village. A single-network eSIM gives you one roll of the dice. TooSim's three-network access gives you three, which is why it earns a top-three spot here despite not being the cheapest.
The practical rule
Mainland and major islands only → buy on price (Ubigi or Breeze). Small islands on the itinerary → pay the extra few dollars for multi-network access (TooSim). Either way, assume the ferry is offline.
Greece's Three Networks
Greece has three mobile operators. Knowing which one your eSIM rides tells you more about the experience you'll get than the provider's brand name does.
Cosmote
The OTE / Deutsche Telekom incumbent and the fastest network on published speed data — averaging roughly 187 Mbps on 5G download. Also the hardest to reach: of the 14 providers we checked, only TooSim names it.
Vodafone Greece
The reliability leader, with the highest overall uptime and strong speeds (around 121 Mbps average 5G download). Named by Nomad, TooSim, and aloSIM.
Nova
Around 115 Mbps average 5G download and the highest user-reported reliability score of the three. Formed when WIND Hellas merged into Nova in January 2023 — some eSIM providers still print the retired "WIND" label. Named by Ubigi, Airalo, Nomad, and TooSim.
Nine of the fourteen providers we checked — Saily, Holafly, Breeze, GigSky, eSIMo, Yesim, Maya, MobiMatter, and SimOptions — don't name a Greek carrier anywhere on their Greece pages. That isn't automatically a red flag; it usually means the eSIM roams across whatever the reseller's wholesale agreement covers. But it does mean you can't predict which network you'll land on, which is worth something on a small island and worth nothing in central Athens.
One detail worth flagging: Breeze lists 3G/4G/5G for Greece where most providers list 4G/5G. Greece's operators have been retiring 3G, so treat that as a legacy label rather than a promise of a 3G fallback layer.
How to Set Up Your Greece eSIM
Install before you fly, on your home WiFi. Every provider in this guide lets you install the eSIM ahead of time and activate it on arrival, and doing it at the gate in Athens airport on patchy public WiFi is how activations go wrong.
Buy and install at home
Purchase the plan, then scan the QR code or use the provider's app to add the eSIM to your phone while you're on reliable WiFi. Nothing starts counting down yet on any of the providers here — activation is triggered by connecting to a Greek network, not by installing.
Label the line
Name it something obvious like "Greece" in your phone's cellular settings. You'll be toggling between it and your home line, and the default labels are unhelpful.
Land, then switch over
On arrival, set the Greece eSIM as your cellular data line and turn data roaming ON for that line only — the eSIM is roaming by design. Leave your home line's data roaming OFF so it can still receive calls and texts without racking up charges.
If you're on TooSim, pick your network
TooSim is the one provider here where manual network selection is a feature worth using. If you have no bars in a village, go into network settings, switch from automatic, and try Cosmote, Vodafone, and Nova in turn.
Full walkthrough with screenshots: How to Set Up an eSIM.
Greece-Specific Tips
Adding Turkey? You need a second plan
Greece is in the EU and Turkey is not, and Turkey is excluded from essentially every EU regional eSIM. The Aegean itinerary that pairs Rhodes or Kos with a few days in Bodrum or Istanbul will strand you on arrival if you only bought a Greece plan. Either buy two country plans, or use a bundle that names both — MobiMatter sells a Greece-Cyprus-Turkey package at 15 GB for $15.49, 30 GB for $26.49, and 50 GB for $39.99.
Skip unlimited — Greece is cheap enough not to need it
In expensive eSIM markets, unlimited plans earn their keep. Greece isn't one. A 30-day unlimited plan costs between $49.99 and $73.90, while 50 GB of fixed data costs $31. Unless you're tethering a laptop full-time, fixed data wins on value by a wide margin here.
Download everything before the ferry
Ferry crossings are the reliable dead zone in a Greek itinerary, and a four-hour run to Crete or the Dodecanese is largely offline. Save your tickets as files rather than relying on an app that needs to phone home, download offline maps for your destination island, and queue up anything you want to watch or read. This matters more than which provider you picked.
Short stopover? The cheap small plans are genuinely cheap
Greece has unusually good pricing at the bottom end. SimOptions sells 1 GB for $1.50 and 3 GB for $2.50 on 3-day validity, and GigSky sells 1 GB for $2.99 over 7 days. For a cruise stop or a one-night layover in Athens, that beats buying a 30-day plan you'll use a tenth of.
Check the validity window, not just the price
Greece plans are sold on wildly different clocks. SimOptions' cheap tiers run 3 to 15 days. GigSky's 20 GB runs 90 days and its 50 GB runs 180. Most others are 7 or 30. A cheaper headline price on a 3-day window is no bargain if your trip is two weeks long.
Frequently Asked Questions
How much data do I need for a week in Greece?
For a week split between Athens and an island or two, 10 GB is the comfortable size and 5 GB is the lean one. Greece leans on cellular data more than a single-city European trip does: you're checking live ferry departures, reading reviews from a dock with no WiFi, and navigating unfamiliar port towns on foot. Hotel and taverna WiFi is common but inconsistent once you're off the mainland. Since the cheapest 10 GB plan runs $11.99 and the cheapest 5 GB runs $6.99, the $5 you save buying small is rarely worth the risk of running dry mid-ferry.
Which Greek network do travel eSIMs actually use?
Greece has three mobile networks: Cosmote (the OTE/Deutsche Telekom incumbent), Vodafone Greece, and Nova. Of the 14 providers whose Greece pages we read for this guide, only TooSim names all three and lets you switch between them manually. Ubigi and Airalo both name Nova. Nomad names Nova and Vodafone. aloSIM's page still lists "Vodafone, WIND" — but WIND Hellas was merged into Nova on 2 January 2023 and the brand retired, so in practice that is Vodafone plus Nova. Saily, Holafly, Breeze, GigSky, eSIMo, Yesim, Maya, MobiMatter, and SimOptions don't disclose a carrier on their Greece pages at all.
Will my eSIM work on the ferries between islands?
Partly. Greek ferries stay within coastal coverage for much of a short hop like Athens (Piraeus) to Aegina or Mykonos to Paros, so you'll usually hold a signal near either end and lose it in the middle. Longer open-water crossings — Piraeus to Crete, or the run out to the Dodecanese — spend hours out of range of any land tower. No travel eSIM changes this, because it's a question of where the towers are, not which reseller sold you the data. Download your tickets, offline maps, and anything you want to read before you board.
Does my eSIM work on the smaller islands, not just Santorini and Mykonos?
Coverage on the well-touristed islands — Santorini, Mykonos, Crete, Rhodes, Corfu, Paros, Naxos — is generally solid on all three networks, with 5G in the main towns. It thins out on the smaller Cyclades and Dodecanese islands, and which network holds up best genuinely varies island to island. This is the one scenario where TooSim's manual switching between Cosmote, Vodafone, and Nova is worth more than a couple of dollars of price difference: if one network has no bars in a given village, you can try another instead of being stuck with whichever one your provider picked for you.
Greece is in the EU — can I use one plan for Greece and Turkey too?
No, and it's the most common cross-border mistake on this route. Greece is in the EU; Turkey is not, and it is excluded from essentially every EU regional eSIM plan. If your trip pairs the Greek islands with a few days in Istanbul or Bodrum — a very common Aegean itinerary — an EU plan will simply stop working when you cross. Either buy two country plans, or look for a bundle that names both: MobiMatter sells a Greece-Cyprus-Turkey package (15 GB for $15.49, 30 GB for $26.49, 50 GB for $39.99) built for exactly this trip.
Is an eSIM cheaper than my carrier's international roaming for Greece?
By a wide margin. AT&T's International Day Pass and Verizon's TravelPass both run roughly $12/day, putting a one-week Greece trip around $84 and a two-week island-hopping trip around $168. The cheapest 10 GB Greece travel eSIM is $11.99 total with 30 days of validity, and a full month of unlimited data tops out around $50 from the cheapest provider. Even the most expensive unlimited plan in this comparison, at $73.90, undercuts two weeks of carrier roaming.
Which Greek network is fastest?
Cosmote, by a clear margin on the published speed data — averaging roughly 187 Mbps on 5G download against about 121 Mbps for Vodafone and 115 Mbps for Nova. Vodafone scores highest on reliability and overall uptime, and Nova rates best on user-reported reliability. The practical catch is that Cosmote is the network fewest travel eSIMs give you access to: of the providers we checked, only TooSim names it. If raw speed matters to you more than price, that narrows the field considerably.
Should I buy unlimited data for Greece?
Usually not. Greece is one of the cheaper eSIM markets, so fixed data is good value here: 10 GB costs $11.99 and 50 GB costs $31. A 30-day unlimited plan starts at $49.99 and runs as high as $73.90, which only makes sense if you're tethering a laptop all month or genuinely can't predict your usage. For a normal two-week island trip, a 20 GB plan at around $21 does the same job for a third of the price.
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