16. Best eSIM Apps for International Data: Airalo vs Holafly

Traveling internationally used to mean hunting for a local SIM card vendor at the airport or paying exorbitant daily roaming fees to your home carrier. For AT&T or Verizon customers, this often costs $10 per day. The rise of eSIM technology has changed this dynamic entirely. By downloading an app, you can instantly install a digital data plan for a fraction of the cost. The two biggest players in this space are Airalo and Holafly, but they cater to very different types of travelers.

Understanding the Contenders

Before comparing prices, it is important to understand the fundamental business model difference between these two services.

Airalo operates as a marketplace for local carriers. They generally sell capped data packages. You buy a specific amount of data (1GB, 3GB, 10GB) for a set number of days. If you run out, your internet stops working until you purchase a “top-up.”

Holafly focuses almost exclusively on unlimited data plans. You pay for the duration of your trip (5 days, 10 days, 30 days) rather than the amount of gigabytes you use. This offers peace of mind but comes with a higher upfront price tag and specific restrictions on data sharing.

Price Comparison: A Real-World Example

To determine which app offers better value, look at a hypothetical 7-day trip to Japan. Japan is a popular destination where public Wi-Fi can be spotty outside of major stations.

Airalo (Moshi Moshi Plan for Japan):

  • 1GB for 7 days: $4.50
  • 3GB for 30 days: $8.50
  • 5GB for 30 days: $11.50

Holafly (Japan Plan):

  • 5 Days Unlimited: $19.00
  • 7 Days Unlimited: $27.00
  • 10 Days Unlimited: $34.00

The Verdict on Price: If you are a light user who primarily needs maps, WhatsApp, and occasional web browsing, Airalo is significantly cheaper. You could buy the 3GB plan for $8.50 and likely have data left over.

However, if you plan to stream YouTube videos, upload high-resolution stories to Instagram constantly, or work remotely, Holafly becomes the better value. Consuming 3GB of data happens quickly if you are watching video content. Paying $27.00 for unlimited access ensures you are never cut off from the network.

The Critical "Hotspot" Difference

This is the most important technical distinction between the two apps.

Airalo allows tethering (hotspots). Because you are paying for a finite bucket of data (like 5GB), Airalo does not care how you use it. You can connect your laptop or iPad to your phone’s hotspot and work freely until the data runs out.

Holafly restricts tethering. For a long time, Holafly did not allow any hotspot use on unlimited plans. Recently, they updated their policy to allow limited tethering on specific plans, typically capped at 500MB per day. Once you share 500MB with your laptop, the hotspot speed throttles or stops, even though your phone still has unlimited data. If you need to work on a laptop during your trip, Holafly might frustrate you.

Network Coverage and Reliability

Both Airalo and Holafly do not own their own towers. They piggyback on local networks. This means the service quality depends entirely on the local partner they use in that specific country.

  • Airalo is very transparent about this. In their app, you can click “Additional Information” to see exactly which network you will connect to. For example, in the United States, their “Change” eSIM connects to T-Mobile or Verizon.
  • Holafly also uses top-tier networks. In Europe, they often partner with heavy hitters like Orange, Movistar, or Vodafone.

In terms of reliability, both are excellent. The difference is rarely about signal strength and almost always about the data allowance.

User Experience and Installation

Both apps have mastered the user interface. The installation process for both follows this standard workflow:

  1. Purchase the plan via the app while you still have Wi-Fi (at home or the airport).
  2. Install the eSIM. On modern iPhones and Androids, this is done automatically with a single button press labeled “Direct Install.” You no longer need to scan QR codes on a second screen, though that option remains available.
  3. Activate. Upon arrival in your destination country, you go into your phone settings, turn on the eSIM line, and ensure “Data Roaming” is switched ON for the eSIM (but OFF for your primary home number).

Airalo’s Loyalty Program: Airalo uses a currency called “Airmoney.” You get 5% cashback on every purchase, which applies to future eSIMs. If you travel frequently, this effectively lowers the cost of future data plans.

Holafly’s Customer Support: Holafly markets itself on premium support. They offer 24⁄7 customer service via WhatsApp. Because their price point is higher, they invest more in helping users troubleshoot connectivity issues immediately.

Alternative eSIM Apps to Consider

While Airalo and Holafly are the market leaders, other apps are worth checking if you want to price shop:

  • Nomad: Nomad often has a cleaner interface than Airalo and competitive pricing for regional plans (like “Europe” or “APAC” bundles). They frequently run promo codes for new users.
  • AloSIM: A strong competitor to Airalo that functions similarly with capped data plans. They sometimes offer cheaper rates for Canada and North America.
  • Maya Mobile: Maya is an interesting hybrid. They offer both capped plans (like Airalo) and unlimited plans (like Holafly), giving you more flexibility within a single platform.

Summary: Which One Should You Choose?

Choose Airalo if:

  • You are budget-conscious.
  • You use Wi-Fi at your hotel and only need data for maps and messaging while walking around.
  • You need to use a mobile hotspot for your laptop or tablet.
  • You are visiting multiple countries in a region (Airalo’s “Eurolink” or “Asialink” regional plans are excellent value).

Choose Holafly if:

  • Money is less of a concern than convenience.
  • You do not want to monitor your data usage.
  • You consume heavy content (Instagram Reels, TikTok, YouTube) while away from Wi-Fi.
  • You want 24⁄7 support access via WhatsApp.

Frequently Asked Questions

Does using an eSIM change my phone number? No. Your physical SIM (or primary eSIM) stays active for calls and texts if you leave it on. You simply choose the travel eSIM as the source for cellular data. This allows you to keep using WhatsApp with your original number.

Will I be charged by my home carrier? To avoid fees, you must ensure “Data Roaming” is turned OFF for your primary home line. Most travelers prefer to turn their primary line off completely or put it in “Airplane Mode” with Wi-Fi on to guarantee zero roaming charges.

Can I make phone calls with these apps? Generally, no. Both Airalo and Holafly provide “Data Only” plans. You cannot make traditional voice calls or send SMS texts. However, you can use the data to make calls via WhatsApp, FaceTime, Messenger, or Skype. Some specific Airalo plans (like the global “Discover+” plan) do include a phone number with minutes, but this is the exception, not the rule.

What phones are compatible? Most flagship phones manufactured after 2018 are compatible. This includes iPhone XS and newer, Google Pixel 3 and newer, and Samsung Galaxy S20 and newer. You should check the “device compatibility” list in either app before purchasing.