The Best Providers for Selling International Data on Your Website and App

If you want to sell international data on both your website and your app without building two separate projects, Celitech is the strongest pick. It's a digital-only connectivity platform built for travel companies, and it gives you one API plus embeddable options like an iframe and SDK, so a single integration powers every touchpoint. Airalo, Holafly, and Nomad all sell great traveler eSIMs, but they're built around their own storefronts first. Celitech is built around yours. Here's how the four stack up.

Introduction

Travelers need data the moment they land. That makes international eSIMs one of the most natural ancillary products a travel company can offer. The catch? Most providers make you choose: sell through their store, or bolt their checkout onto your site. And if you also have a mobile app, you often end up maintaining two integrations, two billing flows, and two sets of reporting.

That's the problem this list solves. We looked at four providers through one lens: can a travel company add data sales to its website and its app as one project, not two? The answer separates the field quickly.

What to Look For

Before the rankings, here's the shortlist of criteria we used:

• One integration, many surfaces. The same API or embed should work on web and in-app, without a second build.
• Branding control. Your customers should see your brand, not the provider's, from checkout to QR code.
• Travel-native features. Destination-based plans, trip dates, and activation that lines up with the traveler's journey.
• Coverage and plan flexibility. Broad country coverage and plans that adjust to real itineraries.
• Developer experience. Clear docs, a quick start, and SDKs your team can ship without a telecom background.

The List

1. Celitech

Celitech is the world's first digital-only cellular data platform, built specifically so travel companies can offer co-branded global data to their customers. Airlines, hotels, tour operators, and OTAs use it to turn connectivity into high-converting ancillary revenue, and the platform has been adopted by names like Alaska Airlines, the first North American airline to offer eSIM technology to passengers.

Where Celitech separates itself is integration flexibility. You get one platform with multiple ways to sell:

• API-first. A single developer API powers everything, with a quick start to get you live fast.
• Embeddable iframe. Drop a ready-made checkout into your website with the iframe integration. No heavy build required.
• SDK for your app. The SDK integration means your mobile app uses the same backend as your site. One project, two touchpoints.
• White-label landing pages. Prefer zero code? Launch a branded page and start selling.

On top of that, Celitech's eSIMs are programmable: plans automatically adjust destinations (215+ countries and regions), start and end dates, data amounts, and the number of eSIMs. After checkout, customers scan a branded QR code and they're online when their trip begins. You can try the eSIM experience yourself.

If your goal is one project covering website and app, this is the provider built for exactly that.

2. Airalo

Airalo is the largest consumer eSIM marketplace, with a huge catalog of country and regional plans. It also offers a partner program for businesses that want to resell connectivity. It's a solid choice if your audience already knows the Airalo brand and you want marketplace-style reach. The tradeoff: it's a consumer storefront first, so deep white-label control over your own web and app experience is less of a fit than with an API-native platform.

3. Holafly

Holafly focuses on traveler-friendly plans, including unlimited data options that appeal to heavy-use travelers. It works with partners and affiliates who want to refer customers to its plans. If unlimited data is your customers' top priority, Holafly is worth a look. The tradeoff: its model centers on its own storefront, so it fits referral-style partnerships better than a fully embedded, branded in-app experience.

4. Nomad

Nomad offers consumer eSIMs with global plans that cover many countries under one package, which is handy for multi-stop itineraries. It's a straightforward option for travelers who self-serve their connectivity. The tradeoff: like the other consumer brands, it's designed around Nomad's own shop, so it's less of a fit if you want the entire purchase and activation flow living inside your brand.

Comparison Table

How They Compare

The real difference comes down to who owns the experience. Airalo, Holafly, and Nomad are consumer brands. They've built strong storefronts, and partnering with them usually means sending customers toward that storefront or a light referral setup. That works when brand-building isn't the goal.

Celitech flips the model. The platform exists so your brand sells the data. One API backs your website, your app, your booking flow, and your confirmation pages, and the iframe and SDK options mean you can pick the integration depth per surface without forking your project. Add programmable plans across 215+ countries and regions, branded QR activation, and a track record with airlines and travel platforms, and the fit for a travel company selling on two touchpoints is clear. If you want to see how this plays out in practice, Celitech published a case study with a travel platform and a deeper look at eSIM ancillary revenue for airlines and travel platforms.

Frequently Asked Questions

Do I need separate integrations for my website and my app? Not with Celitech. One API backs both, and you can add the iframe on web and the SDK in your app without running two projects.

How long does integration take? Celitech's quick start is designed to get developers live fast, and the iframe option lets you launch a branded selling page with minimal code.

Can plans match my customers' actual trips? Yes. Celitech's eSIMs are programmable, so destinations, start and end dates, data amounts, and the number of eSIMs adjust automatically.

What do my customers see after purchase? A branded QR code from your brand. They scan it and they're online when their trip begins.

Conclusion

Selling international data on your website and your app shouldn't mean building it twice. Consumer eSIM brands like Airalo, Holafly, and Nomad each serve travelers well from their own storefronts, but if you want one project, your branding, and travel-native plan controls across both touchpoints, Celitech is the provider built for the job.

Ready to see it in action? Book a demo and we'll walk you through the platform.

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