If you have started shopping for a travel eSIM, you have met the same handful of names: Airalo, Holafly, Saily, and a long tail of smaller providers including Viasimo. They all promise data abroad without roaming fees, so the natural question is which one to buy. The unhelpful truth is that they are not really competing on the same thing. This guide compares them honestly, explains the different business models behind them, and gives you a way to pick the one that actually fits your trip.
In this guide:
- The real question is the model, not the price
- Airalo: the big marketplace
- Holafly: the unlimited specialist
- Saily and the rest
- Where Viasimo fits
- The models side by side
- How to choose for your trip
- What matters more than the brand
The real question is the model, not the price
Comparing travel eSIM providers on headline price alone is like comparing hotels on the nightly rate without noticing that one is a hostel and one is a resort. The number tells you almost nothing until you know what kind of thing you are buying. Travel eSIM providers fall into three broad models: the marketplace, the unlimited specialist, and the storefront. Each is optimised for a different traveller, and once you know which model you are looking at, the price finally means something. Get the model right and the specific brand matters far less than the noise online suggests.
Airalo: the big marketplace
Airalo is the best-known name in the category, and for good reason: it operates one of the widest catalogs in the market, covering most countries and regions you could plausibly travel to, along with regional and global plans. The model is a marketplace of prepaid, data-only plans bought and managed through an app. Its strength is breadth and a low entry price: for a short trip to an unusual destination, you can almost always find a small, cheap Airalo plan.
The trade-offs are the flip side of that model. Everything runs through the app, so buying, installing and topping up assume you are comfortable living inside it. Support is generally handled as in-app tickets rather than a phone call. And because the catalog is so large and plans are sized down to hit low headline prices, it pays to read the data allowance and validity window carefully rather than grabbing the cheapest tile. For a confident, app-comfortable traveller who wants the widest possible choice, Airalo is a strong default; if the app-and-ticket model is what gives you pause, our guide to choosing an Airalo alternative weighs the trade-offs on your own itinerary.
Holafly: the unlimited specialist
Holafly took a different bet: instead of competing on the lowest price for a small bucket, it built its brand around unlimited-data-style plans and premium, always-on support. For a certain traveller this is exactly right. If the thought of watching a data counter ruins your holiday, an unlimited plan means you simply never think about it, and Holafly leans hard into that peace of mind with round-the-clock chat support.
Two honest caveats. First, unlimited rarely means truly unlimited: most unlimited travel plans apply a fair-use policy with throttling after a daily threshold, so heavy streaming or laptop tethering can slow down later in the day. Second, that convenience carries a premium price, and most travellers use only a few gigabytes a day, which means many people who buy unlimited never come close to needing it. If you genuinely stream, tether or travel in a group off one connection, Holafly’s model earns its keep; if not, you may be paying for headroom you will not touch, which is exactly when a Holafly alternative built around right-sized fixed plans becomes the cheaper buy.
Saily and the rest
Saily, from the team behind NordVPN, is a newer, app-based entrant that leans into security-minded features alongside the data plan, which appeals to travellers who already think about digital privacy. Beyond the big three you will also see Nomad, Ubigi, aloSIM and others, each with a slightly different tilt on catalog, pricing and app experience. They are variations on the same two models above: mostly app-first marketplaces, occasionally with an unlimited option bolted on. None of them changes the basic decision, so do not feel you must audit all twenty.
Where Viasimo fits
Viasimo is the storefront model, and it is deliberately built for the traveller the app-first brands underserve. A few things set it apart, stated plainly:
- No app, just a browser. You buy on the web, the eSIM arrives by email as a QR code, and you install it through your phone’s own settings. There is no app to download, no account to babysit, and nothing extra sitting on your phone after the trip.
- One-off prepaid, never a subscription. You pay once for a plan with a known total. There is no recurring charge lurking on next month’s statement and nothing to remember to cancel.
- Competitive prices without the comparison shopping. Viasimo prices each plan sharply and shows the full total upfront, so you get a fair rate without opening three apps to check first.
- A real receipt and human support. Every order comes with a proper invoice and email delivery, and support is there when something needs a human rather than a bot.
The niche is simplicity: a plain, honest, one-purchase experience for people who want data abroad without joining another app ecosystem. It will not have the single widest exotic catalog that a giant marketplace does, and it does not chase the premium unlimited buyer. What it offers is a clean web checkout, transparent upfront pricing and competitive rates, which is exactly what a large share of travellers actually want.
The models side by side
| Provider | Model | Buy and manage | Best for |
|---|---|---|---|
| Airalo | Marketplace | App | Widest catalog and lowest headline price |
| Holafly | Unlimited specialist | App | Travellers who never want to track data |
| Saily and others | App marketplace | App | Niche tilts such as built-in security |
| Viasimo | Web storefront | Browser and email | No-app, one-off purchase with competitive pricing |
How to choose for your trip
Ignore the brand for a moment and answer three questions. Where are you going, how much data will you realistically use, and do you want an app or a plain web checkout? Those answers point you straight at a model.
If you are heading somewhere unusual and want the absolute cheapest small plan, a large marketplace like Airalo is the safe bet. If you stream or tether heavily and would happily pay more never to think about a data cap, Holafly’s unlimited model is built for you, with the throttling caveat in mind. If you want a one-off prepaid purchase in a browser, with no app to install and a fair price shown upfront, that is the Viasimo storefront model. For a structured walk through the same decision, our guide on how to choose a travel eSIM turns it into a short checklist.
What matters more than the brand
Here is the part every provider would rather you skipped: the logo you choose matters far less than sizing the plan correctly. A right-sized plan from any reputable provider beats a badly sized plan from the fanciest one. Two things move your experience more than the brand ever will.
The first is data sizing. Most travellers overbuy or underbuy because they guess; our guide on how much data you need for travel replaces the guess with a quick estimate from your own habits. The second is understanding what you are replacing. If your instinct is to just use roaming, the eSIM versus roaming cost comparison shows why a prepaid plan almost always wins on a trip of more than a couple of days. Nail those two, keep your home number alive with dual SIM, and the provider becomes a detail rather than a dilemma.
When you are ready to buy, browse destinations to see live plans and prices for where you are going, whether that is Thailand, Japan or all of Europe, and pick the model that fits how you actually travel.
