Airalo vs 4S eSIM
— which eSIM is better?
For most of the world, Airalo's breadth makes it the default choice. But for Japan, Thailand, Singapore, Indonesia and South Korea specifically, 4S eSIM's direct carrier relationships often outperform Airalo's resold capacity in real-world speed tests.
Verdict
Airalo wins for global trips; 4S eSIM wins specifically for Asia-focused itineraries, especially Japan, Thailand and Singapore.
Head-to-head
| Criteria | Airalo | 4S eSIM |
|---|---|---|
| Coverage | 200+ countries✓ | 80+ countries (Asia-focused) |
| Asia network quality | Resold local MNO capacity | Direct MNO agreements (NTT, AIS, SingTel, Telkomsel, KT/SKT)✓ |
| Data throttle | Varies by plan | None on premium plans✓ |
| Hotspot/tethering | Yes on most plans | Yes, included |
| Typical price range | $5–$50 | $6–$40 |
Network routing — what's actually different
This is the clearest routing-quality gap in our entire provider set. 4S eSIM has direct agreements with NTT Docomo/SoftBank in Japan, AIS in Thailand, SingTel/StarHub in Singapore, Telkomsel in Indonesia, and KT/SKT in South Korea — these are the dominant networks in each market. Airalo's Asia coverage comes via resold capacity on various local MNOs, which can mean a weaker secondary carrier in the same country. If your trip is Asia-only, this difference shows up directly in download speeds and indoor coverage.
Pick Airalo if...
Travellers whose itinerary spans multiple regions or includes destinations outside Asia.
Get Airalo →Pick 4S eSIM if...
Travellers whose trip is concentrated in Japan, Thailand, Singapore, Indonesia or South Korea, where 4S eSIM's direct carrier access tends to deliver faster, more reliable connections.
Get 4S eSIM →★ Affiliate disclosure: SignalRank earns a commission (10–40%) when you purchase through our links. The verdict above is based on coverage, network routing, and plan structure — commission rates do not affect it.
Airalo vs 4S eSIM — frequently asked questions
Is 4S eSIM better than Airalo in Japan?
For Japan specifically, 4S eSIM's direct relationship with NTT Docomo and SoftBank generally produces faster and more consistent speeds than Airalo's resold capacity. For trips that include Japan plus other countries, Airalo's broader coverage may still be more practical overall.
Does 4S eSIM work outside Asia?
4S eSIM covers 80+ countries with a clear Asia focus. It's not the right choice for trips to Europe, the Americas, or Africa — Airalo's 200+ country coverage is the better fit there.
Which has no data throttling?
4S eSIM's premium plans have no throttle. Airalo's throttle policy varies by plan and country, so check the specific plan details if uninterrupted high-speed data matters for your trip.
See how Airalo and 4S eSIM perform in your destination
Coverage and speed vary by city — check real performance scores for a specific destination.