Updated October 17, 2026 · NomadCue Editorial Team
4ka vs AIS
AIS
4ka
Higher score in this comparison
Where 4ka and AIS differ
| Compare | 4kaReviewSee alternativesSee alternatives | AISReviewVisitVisit |
|---|---|---|
| Price from | €5 | Not confirmed |
| Countries covered | 18 | Not confirmed |
| Unlimited data | Yes | Not confirmed |
| Reference plan prices | Zone 2 travel passes: 500 MB 5 EUR/7 days, 3 GB 10 EUR/30 days (Europe incl. Switzerland, Serbia, Turkey; Greenland, Canada, USA; Egypt, Morocco, Tunisia). UK/Ukraine/Moldova: Zone 1, roaming at home rates under SLOBODA plans. Mexico: Zone 3, no data pack, 0.025 EUR per MB. Japan/Thailand: Zone 3A, no data pack, 3.0750 EUR per MB. EU: unlimited plan gives 11.39 GB in the EU. | Not confirmed |
| Fair use policy | SLOBODA NEKONEČNO for one: unlimited data in Slovakia, of which 11.39 GB in the EU. Shared plan for two to four: 4 GB in Slovakia and the EU; with extra data 18.78 to 33.56 GB in the EU. | Not confirmed |
| Top-ups | Yes | Not confirmed |
Same on both: 5G (Yes), Seller type (Carrier).
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Key differences
- 4ka scores higher overall: 8.9 vs 8.5.
- Support channels: only 4ka offers Phone, Chat.
- Region: only 4ka offers Regional.
- Region: only AIS offers Local.
- Features: only 4ka offers Unlimited data, Instant activation, Carrier plan.
Our verdict on each
4ka
4ka suits Slovak subscribers who want their home plan to roam rather than buying a travel eSIM, and it starts at €5 with coverage across 18 countries. The trade-off is the fair use policy, which caps the EU share of the unlimited data.
AIS
AIS stands apart as a carrier seller focused on local service with 5G for straightforward trips. You get a clear and simple choice for focused mobile travel when your device supports eSIM and you want steady network linked coverage.
Score breakdown
| Area | 4ka | AIS |
|---|---|---|
| Cost | 9.0 | Not confirmed |
| Offer | 9.0HigherRegional reach of 18 countries with unlimited data in the feature list unlimited data, 5g and instant activation and a fair use policy. | 8.6 |
| Trust | 8.3 | Not confirmed |
How they place
| Ranking | 4ka | AIS |
|---|---|---|
| Travel SIMs and eSIMs | 291 of 926 | 92 of 926 |
| Travel eSIMs | 298 of 918 | 94 of 918 |
Every fact side by side
| Fact | 4ka | AIS |
|---|---|---|
| Region | Regional | Local |
| Features | Unlimited data, 5G, Instant activation, Carrier planCovers more | 5G |
| Audience | Short trip, Long trip | Not confirmed |
| Legal entity | SWAN, a.s. | Not confirmed |
| Headquarters | Slovakia | Not confirmed |
| Founded | 2015 | Not confirmed |
| Support channels | Phone, Chat, Help centreCovers more | Help centre |
Where each stands against the rest
| Fact | 4ka | AIS | Median |
|---|---|---|---|
| Price from | €5above the median | Not confirmed | €4.99 |
| Countries covered | 18lowest quarter | Not confirmed | 120 |
Median across 492 listed travel providers.
Pros and cons
4ka
Pros
- Unlimited data on home networks, with top-ups available for a longer trip.
- Roaming to 18 countries, the UK, Ukraine and Moldova at SLOBODA home rates.
- Support on phone, chat and help centre from a carrier founded in 2015.
Cons
- Coverage is limited to 18 countries, well short of a global eSIM.
- Mexico, Japan and Thailand bill per MB under their own zone rates.
- Unlimited data comes with a fair use policy that caps the EU share.
AIS
Pros
- Carrier sourcing that keeps local service tied to mobile networks
- Focused coverage that keeps planning simple for one stop trips
- 5G inclusion that supports faster browsing and maps on supported devices
Who each suits
4ka
Who it suits
- Slovak subscribers on a home plan who want it to keep working abroad
- Travellers on short trips to Europe, Canada and the USA
- People who prefer a carrier desk reachable by phone, chat and help centre
Who should look elsewhere
- Anyone planning a trip outside Europe: Zwitchy covers 200 countries.
- Price-first buyers: eSIMGo.is starts at $0.99 against 4ka's €5.
- Travellers who want a different price point for a single market: SimToIsrael starts at $25.
AIS
Who it suits
- Travelers planning simple trips around one place
- Visitors who want 5G on compatible phones
Current offers
4ka
Current offer
First period offer
Unlimited plan for two at the price of one: first 30 days
Birthday offer; after the first 30 days the plan automatically stays on SLOBODA NEKONEČNO for one unless another plan is chosen
Source, checked September 26, 2026
Bonus
Port your number to 4ka: 4 EUR start credit plus 1 GB data in the EU for 30 days
Number port-in to 4ka, no contract
Source, checked September 26, 2026
Bonus
Free 3 GB roaming pack for customers in affected Middle East countries: 3 GB free for 30 days
Activated automatically on 3 March 2026 for all prepaid and postpaid customers located in affected countries; Middle East countries temporarily moved from Zone 3 to Zone 2
Source, checked September 26, 2026
Country by country
| Country | 4ka | AIS |
|---|---|---|
| Slovakia | Yes | No |
| Thailand | No | Yes |
Questions about each
4ka
How much does a 4ka roaming pack cost?+
Roaming packs start at €5, and travel passes are priced by data allowance and the number of days you buy. Coverage runs to Europe including Switzerland, Serbia and Turkey, Greenland, Canada and the USA, and Egypt, Morocco and Tunisia. The UK, Ukraine and Moldova roam at home rates under the SLOBODA plans.
Is 4ka data really unlimited?+
Unlimited data is listed for home use in Slovakia, and the fair use policy caps how much of it can be used in the EU. Shared plans carry a smaller allowance at home and across the EU, with extra data sold on top. Read that cap before a long EU trip. The roaming map runs to 18 countries.
AIS
What does AIS offer for travelers?+
AIS acts as a carrier seller with local eSIM options. That structure suits travelers who prefer network linked service for one destination. Check that your phone accepts eSIMs before you choose an option.
Where does AIS coverage work?+
AIS focuses on local coverage for trips centered on one destination. That approach keeps planning simple for short stays and city visits. Confirm the destination matches your itinerary for the whole stay.
Other options to compare
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AIS