Search for a travel eSIM and you’ll see the same three names on repeat: Airalo, Holafly, and Travelren. All three work. All three make real trade-offs. And every one of them tells you they’re the cheapest and fastest, which obviously can’t all be true.
This is an honest breakdown for UK travellers: actual pricing in pounds, which carriers each brand routes through in the countries you’re most likely to visit, and when each option is genuinely the right call. We’ll use Opensignal’s public country data rather than marketing claims, and we’ll put our own prices next to the competition so you can decide for yourself.
Travelren keeps the spreadsheet that compares our margins to our competitors. Our team would rather tell you Airalo or Holafly is the better pick for your trip than oversell you on us, because the cost of you buying the wrong eSIM and never returning is higher than the cost of losing today’s sale.
The quick answer, before you scroll
Short version: a week in Tokyo using about 5GB costs roughly £7 with Travelren, £7 with Airalo, or £30 with Holafly for ten days of unlimited. A week in Bangkok: around £5 with Travelren, £5 with Airalo, £18 with Holafly. A week in New York: about £7 with Travelren, £10 with Airalo, £30 with Holafly.
Travelren and Airalo are close to price parity on most plans. Holafly runs 3 to 4 times more expensive because they only sell unlimited plans. The real differences sit in data structure, support, and what happens when things go wrong — not the headline price.
Price comparison at a glance
| Destination | Travelren | Airalo | Holafly (10-day unlimited) |
|---|---|---|---|
| Japan — 3GB / 30 days | £7 | £7 | £30 |
| Thailand — 3GB / 30 days | £5 | £5 | £18 |
| USA — 3GB / 30 days | £7 | £10 | £30 |
| Europe regional — 5GB / 30 days, 25+ countries | £13 | £11 | £27 |
Prices in GBP, retail (no first-buyer discounts). USD converted at 0.79. Last verified April 2026.
How we actually compared them
We pulled current retail prices on each provider in April 2026 — around 3GB over 30 days, or the unlimited equivalent for Holafly. USD converted to GBP at 0.79. Prices are retail, not first-purchase-discounted, because those codes expire and you can’t bank on them for your next trip.
Carrier routing is from Airalo’s network disclosures, Holafly’s plan pages, and our own supplier confirmations. Network performance comes from Opensignal country reports — free, independent, the industry standard for measured rather than advertised speeds.
Europe: where most UK travellers actually go
If you’re reading this from the UK your next trip is probably to Europe — Paris, Barcelona, Rome, Amsterdam, or the full Mediterranean circuit. This is where the eSIM decision differs most from every other market.
First, the unusual thing about UK travellers: many of you don’t need a travel eSIM for Europe at all. EE’s Full Works plan includes Zone 1 roaming at no extra cost, covering most of the EU plus a handful of other destinations. If you’re on Full Works, you can land in Paris, use your existing UK allowances, and pay nothing extra. For other EE customers, the Roam Abroad Pass is £2 per day across most of Europe.
Compared to eSIMs:
Europe regional — 5GB over 30 days, 25+ country coverage
- Travelren regional: approximately £13
- Airalo “Eurolink”: approximately £11, category leader for multi-country Europe
- Holafly regional Europe: 10 days unlimited at approximately £27
The honest recommendation for Brits visiting Europe: check your UK plan first. If you’re on EE Full Works, a Three plan with international roaming, or Vodafone’s Xtra bundles, your home plan probably covers Europe at no extra cost. An eSIM is additive only if you need more data than your home plan allows or if you’re visiting a non-EU country in the same trip. For multi-country trips outside the standard EU roaming zone, Airalo’s Eurolink is the strongest regional option — honestly better than what Travelren offers.
USA: where eSIMs actually save serious money
The United States is outside EE’s free roaming zone and every UK carrier’s roaming there is expensive. This is the trip where eSIM economics pull clear.
USA — 3GB over 30 days
- Travelren: £7, routes on T-Mobile and Verizon 5G
- Airalo “Change”: approximately £10, routes on T-Mobile and Verizon
- Holafly: 10 days unlimited at approximately £30
EE charges £5 per day for USA roaming (or free if you’re on Full Works). For a two-week US trip, Full Works is genuinely competitive with eSIM options since you pay nothing extra. For non-Full-Works customers, even a 5-day US trip runs £25 in EE roaming charges alone — the same or more than a month of Travelren or Airalo coverage.
T-Mobile is the primary carrier on both Travelren and Airalo’s US plans. Opensignal’s US reports have consistently placed T-Mobile first for 5G availability and rural reach, with Verizon edging ahead on peak urban speeds. For the standard UK-to-US itinerary (New York, LA, Vegas, a national park) T-Mobile primary is a genuine plus.
The honest recommendation: Full Works holders don’t need to do anything for a short US trip. Everyone else: for any trip longer than a weekend, an eSIM saves serious money. Travelren is about 30% cheaper than Airalo at retail rates on US plans. Browse the full USA eSIM range from 1GB through 20GB.
Japan: the long-haul splurge
Japan is a growing destination for UK travellers and a good case for eSIMs because EE charges £5 per day there for non-Full-Works customers.
Japan — 3GB over 30 days
- Travelren: £7, routes on SoftBank and KDDI 5G
- Airalo “Moshi Moshi”: approximately £7, routes on SoftBank and KDDI
- Holafly: no 3GB plan, 10 days unlimited at roughly £30
Opensignal’s April 2025 Japan Mobile Network Experience report awarded NTT Docomo the 5G download speed crown at 168 Mbps, with SoftBank on top for 5G availability. For most visitors to Tokyo, Osaka, or Kyoto, you’ll exceed 100 Mbps on SoftBank or Docomo — no practical difference. The gap matters for rural Hokkaido or the Japan Alps, but no consumer eSIM routes on Docomo-primary, so that’s a limitation across all three brands.
The honest recommendation: for a two-week Japan trip, EE roaming at £5/day is £70 total. Travelren or Airalo at £7 for 30 days of data is roughly 90% cheaper. Full Works customers don’t get Japan included — Japan is outside Zone 1. Travelren and Airalo are price-parity here; pick on app preference.
Thailand: the cheapest destination
Thailand is cheap across every eSIM provider. It’s also genuinely cheap on EE — £5/day under the Daily Roaming Pass.
Thailand — 3GB over 30 days
- Travelren: £5, routes on AIS 5G
- Airalo “Vapor”: approximately £5, routes on AIS and True Corp
- Holafly: 10 days unlimited at approximately £18
AIS leads Opensignal’s Thailand rankings on 5G availability and rural reach. Both Travelren and Airalo route AIS-primary. Network experience is effectively identical.
The honest recommendation: for a weekend trip to Bangkok (say Thursday to Monday), EE roaming at £5/day is roughly £20 — within a fiver of a month of eSIM coverage and simpler because you don’t install anything. For a week or longer, eSIM becomes dramatically cheaper. Travelren and Airalo are indistinguishable.
What matters beyond the headline price
Prices shift. Today’s edge can reverse next month. The structural differences between the three are what actually matter.
Fixed data vs unlimited
Travelren and Airalo sell fixed-data plans: buy 3GB, 10GB, or 20GB, and that’s your budget. Top up if you run out, or finish the trip on WiFi. Holafly only sells unlimited — pay more upfront, never think about data. For remote workers, content creators, and anyone using Google Maps all day while also video-calling home, Holafly’s approach removes a small but real source of trip anxiety.
Worth knowing: Holafly’s “unlimited” throttles above roughly 90GB per month and caps hotspot at 500MB per day. Before you assume it means tethering a laptop for a week of work, read the fine print.
Customer support
Difficult to benchmark fairly from inside one of the three brands, so here’s what the forum consensus says. Holafly’s 24/7 WhatsApp support is the strongest for real-time issues — they deliver on the promise. Airalo runs in-app chat with response times that vary by time zone (a UK-favourable gap because their support teams cover European hours well). Travelren responds via email — we’re in Sydney, so UK morning = Sydney evening, meaning replies typically land overnight. For urgent activation issues Holafly wins. For most questions any of them are fine.
When the primary network drops
None of the three lets you manually switch carriers inside a plan — your phone auto-selects the strongest signal from partner networks. If the primary has an outage locally, all three fail the same way. Keeping your home SIM active as a secondary line for calls and SMS is the real insurance, not the brand you pick.
A clear recommendation matrix for UK travellers
- EE Full Works customer, European trip: don’t buy an eSIM. Your home plan covers it.
- Non-Full-Works, multi-country Europe: Airalo Eurolink. Category leader, honestly better than our own regional offering.
- US trip longer than a weekend: Travelren. About 30% cheaper than Airalo on US plans and T-Mobile primary.
- Japan or Thailand, any length: Travelren or Airalo. Near-identical pricing, same carriers.
- Month-long trip, heavy data use, hate topping up: Holafly. The only brand that makes unlimited practical.
- Short EU weekend (2–3 days) and you’re not on Full Works: EE Daily Pass at £2 is simpler than installing an eSIM.
- Digital nomad staying longer than three weeks in one country: physical local SIM on arrival. Cheapest per GB, costs time and sometimes passport registration.
What we’re not trying to change your mind about
If you’ve used Airalo three times and the app is muscle memory, a £1 difference isn’t worth the switching friction. If Holafly let you down once, trust that. If Travelren is new to you, try us on a short trip before a big one. Sensible behaviour.
What we do want you to do: pick one, install it before you fly, and confirm it works at home rather than fighting airport WiFi. All three brands let you install days or weeks before activation. Don’t leave it to the jetway.
Before anything: make sure your phone supports eSIM
Every comparison assumes your phone can run an eSIM. Most iPhones from the XS onwards, every recent Google Pixel, and most flagship Samsung Galaxy devices work. The main exception is iPhones originally purchased in mainland China — they lack the eSIM hardware even when the model number looks identical to a UK-sold unit. If you’re unsure, our device check tool confirms in 30 seconds. Works for every eSIM brand, not just ours.
Frequently asked questions
Do I need a travel eSIM if I’m on EE Full Works?
For most European trips, no — Full Works includes free roaming in Zone 1 (most EU countries plus a handful of others). For non-EU destinations like the USA, Japan, Thailand, or Australia, Full Works charges £5 per day, which adds up fast. For trips longer than three days outside Zone 1, an eSIM is dramatically cheaper.
Is Travelren cheaper than Airalo for UK travellers?
On most destinations Travelren and Airalo are within a pound of each other in GBP. The exception is the USA, where Travelren is about 30% cheaper at retail. Airalo’s Eurolink regional plan is slightly cheaper than Travelren’s regional Europe option and is the category leader for multi-country trips. For Japan, Thailand, and the UK the prices are close enough that interface preference matters more.
Will an Airalo, Holafly, or Travelren eSIM work on my UK iPhone?
Yes. Every iPhone from XS (2018) onwards sold in the UK supports eSIM. The exception is iPhones originally bought in mainland China, which lack the eSIM hardware even when the model number matches. Our device check tool confirms in 30 seconds — works for any eSIM brand, not just ours.
Can I keep my UK number active while using a travel eSIM abroad?
Yes — that’s the whole point of dual-SIM phones. Keep your UK SIM active for calls and SMS (banks, two-factor auth, family contact) and route data through the travel eSIM. Turn data roaming off on the UK line in Settings before you fly so you don’t accidentally rack up charges.
What happens if my eSIM data runs out mid-trip?
Top up from inside the brand’s app — usually under a minute, the new allowance activates immediately. Travelren, Airalo, and Holafly all support in-app top-ups. Fixed-data plans (Travelren and Airalo) require you to remember to do it; Holafly’s unlimited plans skip this entirely but cost 3–4x more upfront.
The final take
Travel eSIMs have matured quickly. Five years ago the honest answer was “sort it on arrival.” Today Travelren, Airalo, and Holafly all ship products that work from the jet bridge onward. The real question is no longer whether to use an eSIM — it’s which one fits your specific trip.
For most UK travellers on most trips, Travelren and Airalo are effectively interchangeable. Holafly is the premium option: pay more, worry less. Physical local SIMs remain cheapest per GB for long stays. And if you’re on EE Full Works and heading to Europe, you might not need a travel eSIM at all — your home plan has you covered.
Whichever you pick, install at home, keep your home SIM active as a secondary line, and confirm your phone supports eSIM before you assume it does. That’s 90% of what matters.
Last updated: April 2026. Prices verified against each provider’s public pages at time of writing. Carrier information sourced from Opensignal country reports and provider network disclosures. We update this article quarterly as prices and carrier routing change.