aloSIM vs Ubigi: Which Travel eSIM Is Better in 2026?

Ubigi is generally the stronger choice for travellers who want unlimited data, reliable 5G and unrestricted tethering on a carrier-grade network backed by Transatel and NTT, while aloSIM is better for occasional travellers who want cheap fixed-data bundles, a friendlier app and a validity clock that only starts when they land.

These two providers are often shortlisted together, and they are more different than the comparison tables suggest. Ubigi is the consumer face of a telecom operator: Transatel, now part of the NTT group, which also supplies embedded connectivity to carmakers and laptop manufacturers. aloSIM is a travel-first reseller with a clean app and a reputation built on simplicity rather than network depth.

That difference in origin shows up everywhere: in how the plans are priced, in what happens when you tether a laptop, and in how quickly someone answers when an activation fails at 11 p.m. in a foreign airport.

aloSIM Overview

aloSIM covers over 200 destinations with fixed-data bundles that start at roughly USD 3.50 for 1 GB. Its headline differentiator is that the validity clock does not begin at installation: plans activate only when the eSIM connects to a foreign network, so you can buy and install weeks in advance without burning days. It also bundles access to a virtual phone number through a partnership with Hushed, which is genuinely useful for travellers who need an SMS-capable number for bookings.

Reasons to choose aloSIM:

• Low entry price for small bundles, around USD 3.50 for 1 GB
• Validity starts on first foreign connection, not at install, which removes pre-trip pressure
• Clean, beginner-friendly app with instant top-ups on the same profile
• Free virtual phone number via the Hushed partnership
• Straightforward regional bundles covering Europe, Asia, the Americas, Africa and Oceania

Reasons to avoid aloSIM:

• Unlimited plans are limited in availability and typically short, often around USD 35 for 10 days
• Trustpilot score of roughly 4.0/5 from about 2,400 reviews, the weaker of the two
• Support is chat and chatbot led, with inconsistent escalation to a human
• Network partners are not disclosed per destination, so coverage quality is hard to predict
• Mid-market per-gigabyte pricing on larger bundles

Ubigi Overview

Ubigi runs on Transatel's own mobile core as part of NTT, which means it is not simply reselling someone else's wholesale data. It covers 200+ destinations, offers unlimited plans in a wide set of countries, and includes unlimited tethering on every plan, a commitment few competitors make in writing. Entry pricing starts around USD 2.90 for 500 MB, and regional value is strong: Europe 10 GB over 30 days lands near USD 15, with the USA at a similar level.

Reasons to choose Ubigi:

• Unlimited tethering included on every plan, stated explicitly rather than buried
• Genuine unlimited plans in many markets, for example around USD 39 for 30 days in France, USD 44 in the UK and USD 65 in Japan
• Carrier-grade infrastructure through Transatel and NTT rather than pure resale
• Strong 10 GB regional value, roughly USD 14 to 15 for 30 days in the USA or Europe
• One reusable eSIM profile for all future trips, topped up in app
• Supports in-car and laptop embedded eSIMs, a niche nobody else serves as well
• Trustpilot 4.1/5 from nearly 47,000 reviews, a far larger evidence base

Reasons to avoid Ubigi:

• The validity clock starts immediately on installation, which punishes early buyers
• Support response times are frequently described as slow despite being 24/7
• The interface and plan naming are more technical and less friendly than rivals
• Small-bundle pricing is fiddly: 500 MB tiers suit nobody on a real trip
• Documentation assumes some comfort with mobile settings

Head-to-head: aloSIM vs Ubigi

Feature	aloSIM	Ubigi
Entry price	~USD 3.50 (1 GB)	~USD 2.90 (500 MB)
Destinations	200+	200+
Unlimited plans	Limited, ~USD 35 / 10 days	Wide, ~USD 39-65 / 30 days
Validity start	On first foreign connection	Immediately at installation
eSIM reuse	Reusable profile, top-ups in app	Reusable profile, top-ups in app
Hotspot / tethering	Allowed on most plans	Unlimited, included on every plan
5G	Yes, where locally available	Yes, where locally available
Support	24/7 chat and chatbot	24/7 multilingual chat and email, slower
Languages	Primarily English	Multilingual
App	iOS and Android, very simple	iOS 4.6/5, Android 4.1/5
Top-ups	In app, same profile	In app, works even with zero data
Trustpilot	4.0/5 (2,400 reviews)	4.1/5 (46,900 reviews)

Coverage

On paper both claim 200+ destinations, and for the countries most people visit the practical difference is small. The distinction is structural. Ubigi operates its own mobile core and negotiates roaming agreements directly, which tends to produce more consistent behaviour on handover between networks and fewer of the odd registration failures that plague thin resellers. aloSIM aggregates wholesale capacity, which is efficient but means quality varies by destination in ways the product page will not tell you.

Neither publishes a complete per-country list of network partners, which is a fair criticism of the whole category. If local network identity matters to you, for example in countries where one operator is dramatically better outside cities, you will need to test on arrival or pick a provider that does disclose.

Pricing and value

aloSIM wins at the very bottom of the market for a usable unit: USD 3.50 for 1 GB is cheaper per gigabyte than Ubigi's USD 2.90 for 500 MB. Below about 2 GB, aloSIM is the better buy.

Above that, Ubigi pulls ahead. Roughly USD 14 to 15 for 10 GB over 30 days in the USA or across Europe is near the best regional pricing available anywhere, and because tethering is unrestricted you can treat that allowance as a genuine work connection rather than a phone-only ration. aloSIM's comparable bundles sit at mid-market rates.

The timing rule changes the maths for anyone planning ahead. aloSIM's deferred activation means a plan bought in advance loses nothing. Ubigi's immediate start means a 7-day plan installed three days before departure gives you four usable days. Install Ubigi on arrival, not before.

Unlimited data

This is Ubigi's clearest win. It sells unlimited plans across a broad set of markets at monthly prices, roughly USD 39 for 30 days in France, USD 44 in the UK and USD 65 in Japan, and pairs them with unlimited tethering. For a month-long stay or remote work, that combination is hard to beat.

aloSIM's unlimited options exist but are narrower and shorter, commonly around USD 35 for 10 days. That is reasonable for a short intensive trip and poor value for anything longer.

It is worth noting the wider market context: HOLASIM also competes directly here with unlimited plans on an eSIM that never expires and 24/7 support in English, Spanish and Portuguese, starting from around USD 1.70. Its own honest caveat is the same one that applies to every unlimited product, namely that those plans cost more than fixed-data bundles.

Support and user experience

aloSIM has the better first impression. The app is simple, purchase to install takes a couple of minutes, and the interface does not assume you know what an APN is. Its weakness is depth: chatbot-first support handles password resets well and genuine activation faults badly.

Ubigi's app is competent and well rated (4.6/5 on iOS, 4.1/5 on Android) but speaks more like a telco. Support is 24/7, multilingual and email-capable, yet slow response times are the single most common complaint in its reviews. The compensating factor is scale: a 4.1/5 average across nearly 47,000 reviews is far more informative than a similar score across 2,400.

Which should you choose?

• Backpackers and budget travellers: aloSIM, for cheap 1 to 3 GB bundles and the deferred validity clock that lets you buy before you go.
• Business travellers: Ubigi, for unlimited tethering, carrier-grade handover and the ability to treat a laptop as a first-class device.
• Families: Ubigi if one phone will hotspot the others, since unrestricted tethering removes the main failure mode. aloSIM if each person buys their own small bundle.
• Digital nomads: Ubigi for month-long unlimited plans with tethering. Consider HOLASIM as an alternative if you want unlimited data on a profile that never expires across many trips a year.
• Occasional holidaymakers: aloSIM, because the app is the least intimidating and the money at stake is small.

FAQ

Is Ubigi a reseller or a real operator?

Ubigi is the consumer brand of Transatel, part of the NTT group, and runs its own mobile core. That is closer to being an operator than most travel eSIM brands, which buy wholesale capacity from intermediaries.

Does aloSIM allow hotspot and tethering?

Yes on most plans, though it is not guaranteed on every destination and is not stated as a blanket policy. Ubigi, by contrast, includes unlimited tethering on every plan.

When does my data start counting?

With aloSIM, only when the eSIM first connects to a foreign network, so you can install early. With Ubigi, the clock starts at installation, so install on arrival rather than at home.

Which one is cheaper?

aloSIM is cheaper for very small bundles, around USD 3.50 for 1 GB. Ubigi is cheaper per gigabyte at 10 GB and above, with roughly USD 14 to 15 for 10 GB over 30 days in major regions.

Can I keep the same eSIM for future trips?

Both support a reusable profile topped up in the app. Ubigi can top up even when you have no data left, which matters more than it sounds when you are stranded without Wi-Fi.

Do either of them include calls or a phone number?

Both are data-only. aloSIM bundles a free virtual number through Hushed, which gives you an SMS-capable line. Ubigi does not, so you rely on VoIP or your home number.

The verdict: Ubigi is the better product for anyone whose trip involves a laptop, a month abroad or heavy data use, thanks to unlimited plans, unrestricted tethering and genuine network ownership, and its weak point is the immediate validity start and sluggish support. aloSIM is the better product for short, light, occasionally-planned trips where the deferred activation clock and a friendly app matter more than peak capability. If unlimited data plus a profile that never expires is the brief, HOLASIM is worth putting on the same shortlist.