Buying an eSIM has become remarkably easy. Knowing exactly what you are buying is another matter.

 

The travel eSIM market now includes global marketplaces, telecom-backed brands, security-led products, unlimited-data specialists and newer providers competing aggressively on price. Trusted Connectivity Alliance estimates that 605 million eSIMs were shipped globally in 2025, up 18% year on year, while consumer eSIM profile downloads increased 43%. GSMA Intelligence expects eSIM penetration among smartphones to rise from 5% at the end of 2025 to 10% by the end of 2026, and to double again in 2027.

More choice is good.

It also makes comparison harder.

A €4 plan can be excellent value. An unlimited plan can genuinely make travel simpler. A beautifully designed app can make activation almost invisible.

None of those things, by itself, tells you how comfortable you should feel buying from the provider behind it.

Can you understand when the plan starts? Is throttling explained before purchase? What happens if the eSIM fails? Is there somebody to contact? Can you see your remaining data? Are refund conditions clear? Is there a substantial connectivity operation behind the storefront?

That is what the Alertify eSIM Trust Index is designed to examine.

It is not another cheapest-eSIM ranking.

It does not attempt to say which provider has the fastest network everywhere.

And it does not assume that the company with the biggest brand, the lowest price or the strongest telecom parent automatically deserves first place.

It asks a narrower question:

How confidently can a traveller understand, buy, manage and recover an eSIM service when something does not go according to plan?

Alertify eSIM Trust Index: September 2026

This first benchmark covers ten established travel eSIM providers for which Alertify found enough public evidence to conduct a meaningful comparison.

Provider	Transparency /25	Support /20	Billing /20	Operational credibility /20	Customer control /15	Trust Score	Evidence
1. Airalo	24	19	17	18	14	92/100	A
2. Ubigi	23	19	15	20	14	91/100	A
3. Nomad eSIM	22	18	18	18	14	90/100	A
4. Saily	22	19	18	17	14	90/100	A
5. Holafly	20	20	19	17	13	89/100	A
6. Jetpac	21	19	17	18	14	89/100	B
7. Roamless	23	17	17	16	15	88/100	A
8. GigSky	22	17	15	20	13	87/100	B
9. Yesim	21	20	15	17	14	87/100	A
10. aloSIM	22	20	15	16	13	86/100	A

The first thing worth noticing is how close the scores are.

That is intentional.

This inaugural benchmark does not include every eSIM brand on the internet. It starts with relatively established providers with enough documentation, operational history and public information to be assessed properly.

So an 86 is not a warning sign, and a 92 does not mean perfection.

The difference between them is usually something more subtle: how much uncertainty the customer is expected to carry.

Related Insight:

Travel eSIM Market Fragmentation: Challenges, Opportunities, and Industry Impact

→

How the Trust Index works

Every provider is scored out of 100 using the same five categories.

The weights reflect the things Alertify believes matter most when deciding whether an eSIM is safe to recommend—not merely easy to buy.

Product transparency — 25%

Trust starts before payment.

An unlimited plan does not lose points simply because it has a fair-use policy.

Almost all mobile connectivity is ultimately subject to some form of capacity management.

The important question is whether the customer can find out what those limitations mean before relying on the service.

Airalo, for example, currently states that its unlimited plans provide 3GB of high-speed data per day before continuing at reduced speeds, and explicitly confirms that tethering is allowed within the same allowance.

Jetpac similarly publishes that its unlimited packages provide the first 3GB every 24 hours at standard speeds before speeds fall to up to 1 Mbps until the allowance refreshes.

Whether 3GB is enough for a particular traveller is a separate question.

From a trust perspective, the useful thing is that the number exists.

Support confidence — 20%

Support barely matters when everything works.

Then the eSIM refuses to connect after landing.

Suddenly it matters a lot.

Alertify scores what can actually be verified publicly. We do not turn a company’s claimed response time into proven performance unless we have independently tested it.

Yesim, for example, publishes 24/7 support and states an average five-minute response time. The 24/7 availability is a verifiable service proposition; the five-minute average remains the provider’s own performance claim.

Saily publishes 24/7 live-chat and email assistance, although live chat is routed through the Saily app rather than operating as an unrestricted web-chat service.

Ubigi deserves more credit here than a superficial review of its contact page might suggest.

Its help environment includes a dedicated support form that sends account-specific cases to support specialists, an interactive chat on its support pages, automated WhatsApp assistance for general questions, and an extensive help centre covering installation, activation, connectivity problems, APN settings and device troubleshooting. More complex requests can be escalated to the human support team.

That combination is why Ubigi scores 19/20 for support.

Not 20, because not every channel represents direct round-the-clock human assistance.

But certainly not the 15/20 that a simple contact-form interpretation would suggest.

Billing and refund clarity — 20%

Trust becomes very concrete when money is involved.

There is an important distinction here:

Generous terms and clear terms are not the same thing.

A provider can have strict refund conditions and still communicate them honestly.

Nomad publishes one of the more detailed refund frameworks in the group. Requests generally need to be made within 30 days, unused or unactivated plans may qualify for full refunds, and partial refunds can be considered in certain technical-failure scenarios. Its documentation also distinguishes plans that fall outside the standard policy.

Saily also allows full refund requests within 30 days for qualifying non-activated plans, while partially or fully used plans are assessed differently.

Holafly stands out for customer-friendly refund conditions on qualifying purchases. Its current terms provide up to six months for full refund requests on eligible unactivated eSIMs or subscriptions and allow full or partial refunds in specified service-failure circumstances.

Ubigi is much stricter.

Its published assistance information says preloaded plans can be refunded if the data has not been used, while plans that have already begun consuming data generally cannot be refunded. Technical failures caused by Ubigi may qualify for refunds under specified conditions.

That costs Ubigi billing points.

But the policy itself is not hidden.

That distinction matters.

Operational credibility — 20%

The earlier version of the Trust Index called this “infrastructure credibility.”

That was too narrow.

A telecom parent company is relevant, but it should not automatically translate into a high trust ranking. Corporate pedigree is not proof that a particular eSIM will deliver the best experience in a particular destination.

Ubigi is particularly strong.

Ubigi is a brand of Transatel, part of NTT, giving it one of the most substantial telecom foundations in the consumer travel eSIM category. Its own documentation explicitly identifies that relationship.

GigSky also scores the full 20 points. Its GCore documentation describes a global cellular network that has operated for more than 15 years, with long-standing Tier-1 carrier relationships and access to connectivity across more than 200 countries.

Nomad has a different operating model but still benefits from meaningful telecom depth through LotusFlare. Its own help centre identifies Nomad as part of LotusFlare.

This category therefore rewards evidence of a real connectivity operation without assuming that telecom heritage alone makes the customer experience superior.

Customer control and recovery — 15%

The original Trust Index used the phrase “real-world confidence.”

It sounded sensible.

It was also too vague.

It risked mixing app reviews, user anecdotes and network performance into one editorial judgement.

So this version replaces it with customer control and recovery.

Roamless scores the full 15.

Its FLEX credits remain available for future trips rather than expiring after a fixed travel window, while users can track changing local data value through the app.

Airalo allows users to monitor usage, receive low-data notifications and purchase top-ups on eligible plans.

Ubigi also performs strongly. Users can view remaining balance through the app or account even after credit has been exhausted, recharge an existing profile and continue using the same eSIM rather than repeatedly installing new profiles.

These are not glamorous features.

They become important very quickly when a trip changes.

Related Insight:

There Are Two Types of eSIM Providers—and They Don’t Compete on the Same Level

→

What the Evidence grade means

The Trust Score and Evidence grade are deliberately separate.

A provider can score well while receiving a lower evidence grade.

An Evidence B does not automatically subtract points from the Trust Score.

That avoids an important methodological mistake:

absence of evidence is not automatically evidence of poor service.

There is one exception.

When the criterion itself is transparency—whether the customer can actually find a material rule before purchase—the absence of information may legitimately reduce the transparency score.

That is different from assuming an undocumented technical capability does not exist.

Why Airalo currently leads 92/100 Its advantage is not simply that it is one of the industry’s biggest brands. It is documentation. Its unlimited-plan pages state the daily high-speed allowance, tethering rules and the effect of the fair-use policy. Its help centre explains validity, data monitoring, top-ups and support availability in considerable detail. That reduces uncertainty. Airalo still loses points. Refund eligibility can become more restrictive once a service has been used, and the company operates through a large and sometimes complicated portfolio of local, regional and global products. So 92 does not mean flawless. It means Alertify found fewer unanswered customer questions than with the rest of the benchmark.	Why Ubigi is now second 91/100 Ubigi sits just one point behind Airalo, and that score shows how the methodology works when applied consistently. Transatel and NTT give Ubigi one of the strongest operational foundations in the category, but infrastructure alone would not put it second. Its support environment contributes significantly too: a dedicated contact form, interactive support chat, automated WhatsApp assistance and a large technical knowledge base. Users also have strong control after purchase, including remaining-credit visibility, reuse across trips and detailed troubleshooting guidance. Where does it lose ground? Refund flexibility. Unused plans may qualify for refunds, but the rules become much narrower once data has been consumed. That is why Ubigi can score strongly for transparency while remaining more conservative on billing.
Nomad 90/100 Nomad performs particularly well in billing clarity. Its help centre goes beyond a vague “contact us for a refund” message and describes unused plans, activated plans, partial refunds, refund methods, processing times and several exceptions. That level of detail matters. Nomad also benefits from LotusFlare’s telecom background and has a substantial support library covering troubleshooting, billing and account management.	Saily 90/100 Saily reaches the same score as Nomad, but for slightly different reasons. Its strength sits more heavily in support and the wider operational environment. It publishes 24/7 support through live chat and email, provides a clear 30-day refund framework for qualifying unused plans and comes from Nord Security. That does not earn Saily imaginary network-quality points. A security pedigree is not evidence of better roaming routes. It does, however, contribute to confidence that there is a substantial organisation behind the service.
Holafly 89/100 Holafly’s strongest area is customer protection Its current terms provide an unusually long refund window for qualifying unactivated purchases and allow full or partial refunds in several defined scenarios. The larger deduction comes from transparency around unlimited connectivity. Fair-use restrictions may apply, but the practical threshold is not always communicated as one simple universal high-speed allowance across every destination and product. The Trust Index therefore rewards clarity about what unlimited actually means.	Jetpac 89/100 Jetpac reflects the move toward more flexible travel connectivity. Its unlimited products publish concrete high-speed allowances, activation rules and throttling behaviour. Some current plans also include additional travel-service features beyond pure connectivity. The value here is not simply the extras. It is that important operating conditions are relatively easy for the customer to understand before travelling.
Roamless 88/100 Roamless receives the maximum score for customer control. Its FLEX model is unusual because unused pay-as-you-go credits do not simply disappear at the end of a normal trip period. They carry forward for future travel, while the app recalculates their practical data value according to destination pricing. That does not prove Roamless has a better network. It does reduce the number of decisions the traveller has to make — and reducing unnecessary friction is part of trust.	GigSky 87/100 Operationally, GigSky is among the strongest companies in the ranking. Its GCore platform describes long-term carrier relationships, multi-network resilience and more than 15 years of operation, earning a full 20/20 for operational credibility. But the Trust Index is deliberately not an infrastructure ranking. The consumer-facing experience still has to explain billing, refunds, plan conditions and recovery options with the same clarity. A technically serious provider deserves credit for being technically serious. It should not receive a free pass everywhere else.
Yesim 87/100 Support is one of Yesim’s strongest areas. It publishes 24/7 support and identifies Genesis Group AG in Switzerland as the legal entity behind the service. Its contact page also publishes an average response-time claim, although Alertify does not independently score the five-minute figure as verified support performance. The larger deductions are in billing, where refund rules and service conditions become more restrictive after activation or usage.	aloSIM 86/100 aloSIM also performs strongly in support. It publishes a 30-day refund guarantee and states that live chat and email support are staffed around the clock. Its terms identify AffinityClick Inc. as the company behind the service. Again, the Trust Index does not ask whether a brand is simply “good” or “bad”. It asks where the customer carries more risk or uncertainty.

What the Trust Index does not measure

This section is essential.

The Alertify eSIM Trust Index does not measure:

• latency;
• jitter;
• packet loss;
• download speed;
• upload speed;
• local radio coverage;
• network congestion;
• routing quality;
• actual support response time unless independently tested.

A provider scoring 92/100 here can still perform badly in one city.

A provider scoring 86/100 can deliver an excellent network experience.

Mobile connectivity depends on local operator partners, roaming routes, device capability, signal strength, congestion, indoor conditions, network architecture and time of day.

Those questions belong in the Alertify Latency Report and performance testing, not inside an editorial trust score.

The distinction is simple:

Trust asks:
Can I understand and control the product with reasonable confidence?

Performance asks:
How well did the connection actually perform under the conditions we tested?

A genuinely strong eSIM provider should eventually perform well on both.

But combining them prematurely would make the methodology less useful, not more.

Commercial relationships and editorial independence

Alertify works commercially with companies across the eSIM, roaming and travel-connectivity market.

Some providers included in this ranking may be advertising partners, content partners or affiliate partners. Alertify may earn commission when readers purchase certain services.

That relationship does not determine the score.

Advertising does not add points.

Affiliate commission does not remove deductions.

A company with a commercial relationship with Alertify can rank below a company with which Alertify has no commercial agreement.

Providers are assessed against the same methodology and the same categories.

Where Alertify cannot verify something, we do not present it as established fact.

Where a provider changes a policy, we may change its score.

This disclosure is particularly important for an index about trust.

How scores will change

The eSIM market moves too quickly for this to be a static annual list.

Refund policies change.

Unlimited allowances change.

Support channels appear.

Subscription products are launched.

Companies are acquired.

Network arrangements evolve.

The Alertify eSIM Trust Index will therefore conduct a full review at least quarterly, while material changes may trigger an off-cycle update.

Changes that can affect a score include:

• refund conditions;
• fair-use or throttling policies;
• support availability;
• activation rules;
• subscription and renewal terms;
• corporate ownership;
• customer-management tools;
• material network or operating-model disclosures.

Each edition should retain its review date and methodology version.

If Alertify changes the methodology itself, that should be stated rather than quietly recalculating historical scores as though nothing changed.

That creates an audit trail.

And an index that measures trust should have one.

What the ranking really tells us

The most interesting thing about the first Alertify eSIM Trust Index is not that Airalo scored 92 and Ubigi scored 91.

It is what separates them.

Airalo’s advantage is largely consumer-facing transparency and control.

Ubigi’s advantage is unusually strong telecom credibility combined with a support environment that is more substantial than it initially appears.

Nomad is particularly strong on detailed refund documentation.

Saily combines support with a strong technology organisation behind it.

Holafly offers generous customer protection but still leaves more questions around how unlimited usage can behave.

Roamless shows how flexible balances can reduce customer risk.

GigSky proves that deep telecom infrastructure alone does not automatically win an editorial trust ranking.

That is exactly the point.

For years, travel eSIM comparison was mostly about price, gigabytes and countries.

Those things still matter.

But as eSIM moves into the mainstream, a more mature question is emerging.

What exactly am I buying?

Who is behind it?

What happens when it fails?

Can I recover my money?

Can I reach somebody?

Can I see what I have left?

Can I understand the limitations before they become my problem?

Providers that answer those questions clearly deserve credit.

Providers that force travellers to discover important conditions only after purchase should lose points, even if their headline price is excellent.

And companies with serious telecom infrastructure should be recognised without automatically being declared the best consumer experience.

That is what the Alertify eSIM Trust Index is for.

Not to manufacture a winner.

Not to turn trust into another affiliate badge.

But to make trust itself measurable.