There is no single best eSIM — there’s a best eSIM for how you use your phone. If you mostly need maps and messages, a fixed-data plan is far cheaper than “unlimited”. If you stream, work or hotspot a laptop all day, a daily-unlimited plan saves you from running out. Below we compare seven providers on real prices, checked on 8 October 2026.
ICY SIM is our own product, and it’s in this list. We’ve judged it on the same criteria as everyone else and say where others are better. Prices change often — every figure below is dated and linked to where we checked it.
- Light to moderate users save the most with fixed-data plans (ICY SIM, Nomad, Ubigi, Airalo).
- Heavy users are better off with daily-unlimited plans — but read the fair-use rules: most slow you down after a daily allowance.
- Holafly limits hotspot to 1 GB a day; Airalo counts hotspot inside its 3 GB/day high-speed allowance.
- Need a phone number? Airalo’s Discover+ global plan and Saily’s optional US number add-on include one; most others are data-only.
- Refund windows differ a lot — from 24 hours (ICY SIM) to 6 months (Holafly) for unused eSIMs.
Quick picks
| If you want… | Look at | Why |
|---|---|---|
| The lowest price for fixed data | ICY SIM, Ubigi, Nomad | Lowest per-GB prices in our Japan and Europe checks |
| Unlimited data, simple daily pricing | Holafly | Unlimited by the day in 200+ destinations; hotspot capped at 1 GB/day |
| One plan for many countries | Maya Mobile, Airalo regional | Maya’s single global unlimited plan; Airalo’s regional packs |
| A phone number with your eSIM | Airalo Discover+, Saily | Number included or available as an add-on |
| The biggest brand / most reviews | Airalo, Holafly | Tens of thousands of Trustpilot reviews each |
How we compared them
We looked at what actually changes your trip: price for two common trips (Japan around 5 GB, Europe around 10 GB — or the 7-day unlimited price where a provider only sells unlimited), plan type (fixed data vs daily unlimited and its fair-use rules), hotspot rules, whether a phone number is available, the refund policy, and Trustpilot scores. Prices come from each provider’s own site; where a site blocked us, we used the esimDB price tracker and say so. All checked 8 October 2026, in US dollars.
Side-by-side comparison
| Provider | Plan type | Japan (~5 GB) | Europe (~10 GB) | Hotspot | Trustpilot |
|---|---|---|---|---|---|
| ICY SIM | Fixed GB | $6 (5 GB, 30 days) | $22 (10 GB, 30 days) | Yes | — |
| Airalo | Fixed GB + unlimited | $11 (5 GB, 30 days) | $24–31 (10 GB, 30 days) | Yes | 4.1 (46k reviews) |
| Holafly | Unlimited (daily) | $27.50 (7 days) | $27.50 (7 days) | 1 GB/day | 4.7 (114k reviews) |
| Saily | Fixed GB + unlimited | $10.99 (5 GB, 30 days) | $35.99 (10 GB, 30 days) | Yes | 4.7 (32k reviews) |
| Nomad | Fixed GB + unlimited | $10 (5 GB, 30 days) | $23 (10 GB, 30 days) | Yes | 4.3 (45k reviews) |
| Ubigi | Fixed GB | $10 (5 GB, 15 days) | $15 (10 GB, 30 days) | Yes | 4.1 (48k reviews) |
| Maya Mobile | Unlimited (global) | $19.99 (7 days) | $19.99 (7 days) | Yes | 4.5 (13k reviews) |
Unlimited prices are for 7 days, so compare them with fixed plans by thinking about your trip length and how much data you really use (see how much data you need).

1. ICY SIM — best value for fixed data (our product)
Who it’s for: travellers who want a simple, cheap data plan and know roughly how much they’ll use. Plans run from 1 GB for 7 days to 20 GB for 30 days in 190+ destinations, with regional plans for multi-country trips. In our checks it had the lowest price for Japan ($6 for 5 GB / 30 days) and was competitive for Europe ($22 for 10 GB / 30 days).
- Pros: low per-GB prices; hotspot supported; validity starts on first use, so you can install early; the destination pages list the actual local networks.
- Cons: no unlimited daily plans on our website; data-only (no phone number); a short refund window — unused eSIMs must be reported within 24 hours of purchase; a young brand with far fewer reviews than the big names.
2. Airalo — the biggest catalogue
Who it’s for: people who want a well-known brand and lots of choice. Airalo (founded 2019) claims 200+ locations and sells both fixed-data plans and unlimited plans. Its unlimited plans give 3 GB a day at high speed, then reduced speed, resetting every 24 hours. Japan 5 GB / 30 days was $11; Europe 10 GB / 30 days was $24 (EUconnect, 28 countries) or $31 (Eurolink, 41 countries).
- Pros: huge catalogue; hotspot allowed; the Discover+ global plan includes a US number with calls and SMS.
- Cons: pricier than the cheapest fixed-data options; refunds for “wrong purchase” or “change of plans” are paid as in-app credit (Airmoney); Trustpilot reviewers mention activation problems and recent price rises.
3. Holafly — simplest unlimited
Who it’s for: heavy users who don’t want to think about gigabytes. Holafly sells almost only unlimited plans priced by the day — Japan and Europe were both $27.50 for 7 days. The key limit: hotspot sharing is capped at 1 GB per day, and operators may temporarily slow speeds under fair use.
- Pros: no data maths; pick any number of days; long refund window (up to 6 months for unused eSIMs); high Trustpilot score.
- Cons: expensive for light users; data-only; hotspot limit is restrictive for laptop work; Trustpilot currently shows a notice that it is working with Holafly to address past guideline violations.
4. Saily — from the makers of NordVPN
Who it’s for: travellers who like an all-in-one app from a security company. Saily is made by Nord Security (NordVPN) and launched in 2024. It sells fixed and unlimited plans — unlimited is reported as 5 GB a day at high speed. Japan 5 GB / 30 days was $10.99; Europe 10 GB / 30 days was $35.99 (esimDB).
- Pros: strong reviews; optional US phone number from $0.99/month; full refund within 30 days if not installed.
- Cons: the most expensive of the group for Europe fixed data in our check; we couldn’t verify some policies directly on Saily’s site (it blocked us).
5. Nomad — strong all-rounder
Who it’s for: price-conscious travellers who want both fixed and unlimited options. Nomad (run by LotusFlare, California) had Japan 5 GB / 30 days at $10 and Europe 10 GB / 30 days at $23 (35 countries). Some Nomad plans include a local phone number.
- Pros: competitive prices; hotspot supported; 30-day refund window for plans not installed or activated.
- Cons: unlimited plans are non-refundable; its unlimited throttle speed is reported inconsistently (512 kbps on its own page); Trustpilot reviewers mention patchy speeds in some areas and slow support.
6. Ubigi — cheapest for Europe in our check
Who it’s for: Europe trips and frequent travellers. Ubigi is a brand of Transatel (NTT Group) and sells fixed-data plans, including monthly auto-renewing ones. It had the lowest Europe price in our check — $15 for 10 GB / 30 days (38 countries, via esimDB). Japan 5 GB was $10 for 15 days.
- Pros: very cheap Europe data; data sharing allowed; backed by a large telecom group.
- Cons: strict refunds (only if no data was used, within 14 business days); 12% of Trustpilot reviews are 1-star, citing connection and activation problems.
7. Maya Mobile — one global unlimited plan
Who it’s for: multi-country trips where you want one plan everywhere. Maya sells a single global unlimited eSIM for 165+ countries at the same price: $19.99 for 7 days — the cheapest unlimited option we found.
- Pros: one price everywhere; hotspot included; good value for long multi-country trips.
- Cons: its terms say high-speed data has a daily quota (amount not stated) while its marketing says “no throttling”; data-only; reviewers mention slow refunds.

Fixed data vs unlimited: which actually saves money?
Most people overestimate how much data they use abroad. Maps, messaging, email and some social media come to roughly 150–500 MB a day; it’s video, video calls and hotspot that push you past 1 GB. Using the prices above (checked 8 October 2026):
| Trip | Typical data | Cheapest fixed option | Cheapest unlimited option |
|---|---|---|---|
| A week in Japan, maps + messaging | ~1–3 GB | ICY SIM 3 GB / 15 days: $4 | Maya 7 days: $19.99 |
| A week in Japan, social + photos | ~3–5 GB | ICY SIM 5 GB / 30 days: $6 | Maya 7 days: $19.99 |
| A week in Europe, heavy use | ~7–10 GB | Ubigi 10 GB / 30 days: $15 | Maya 7 days: $19.99 |
| A week streaming or video-calling daily | 10 GB+ | Large fixed plans | Holafly / Airalo / Saily ~$27–29 |
The pattern is clear: unlimited only pays off if you genuinely use a lot every day — and even then, check the daily high-speed allowance. For everyone else, a fixed plan in the right size is cheaper, and you can top up if you run low.
What matters less than you’d think
- “200+ destinations”. Almost every provider claims it. What matters is whether *your* destinations are covered, on which local networks.
- Brand size. The big names have more reviews, but they all buy network access from the same kinds of local operators. Network names (listed on each destination page) tell you more than the logo.
- Headline speed claims. Your speed depends on the local network, your phone and where you are — not on the eSIM brand.
Red flags when choosing any eSIM
- No clear fair-use wording on an “unlimited” plan — or marketing that contradicts the terms.
- Refunds only as app credit, if you might change your plans.
- No list of local networks for your destination.
- Prices that only show after sign-up. Every provider here shows prices up front.
How to choose for your trip
- Weekend city break, maps and messages: a small fixed plan (1–3 GB). Unlimited is wasted money here.
- One to two weeks, normal use: 5–10 GB fixed. Check how much data you need.
- Working remotely or streaming daily: daily unlimited — but check the high-speed allowance and the hotspot limit if you tether a laptop.
- Several countries: a regional plan (e.g. Europe, Asia) or a global unlimited plan.
- You need a number for calls or verification: Airalo Discover+ or Saily’s number add-on — or keep your home SIM active for calls.
What to watch out for with any provider
- “Unlimited” rarely means unlimited speed. Most plans slow down after a daily allowance — Airalo 3 GB, Saily 5 GB, Holafly’s fair-use clause.
- Hotspot limits matter if you work from a laptop.
- Refund rules — some pay back only in app credit, some only if nothing was used, some within 24 hours.
- Compatibility: any eSIM needs a compatible, carrier-unlocked phone — check yours.
Compare our prices for your destination
See live ICY SIM plans and the local networks they use — then compare with the table above.
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