Methodology
Our Comparison Methodology
Comparing eSIM providers is only useful when the comparison is structured and repeatable. This page explains exactly how we collect data and apply the same scoring rubric to all 5 providers we track.
Data collection process
We collect plan data directly from each provider's public website and app. For every provider-destination pair, we record available plan sizes, durations, prices, network partners, and whether the plan includes voice or SMS. We cover 209 destinations and re-collect all pricing data weekly. Feature data (app quality, activation method, support channels) is audited monthly against each provider's current published product pages, app store listings, and help centre.
Feature scoring rubric
Eight documented criteria feed the five scored dimensions. Each dimension receives a score from 1 to 5:
Country coverage
Number of supported destinations and whether the provider covers the full country or only urban areas
Price competitiveness
Per-GB cost normalized across plan sizes, compared to the median price for that destination
Plan flexibility
Range of data sizes and durations available, including whether custom bundles or top-ups exist
Network quality
Which local carrier the eSIM routes through and which network generations that carrier publishes for the destination
Activation method
Documented steps from purchase to a working data connection, and whether install happens in-app or through a browser redirect
App usability
Setup flow clarity, data usage tracking features, and ease of managing multiple eSIMs
Support channels
Which channels the provider publishes (live chat, WhatsApp, email, phone) and whether any of them are real-time
Refund and cancellation terms
Whether unused plans can be refunded and how transparent the policy is before purchase
How matchup pages work
Our head-to-head comparison pages (for example, Airalo vs Holafly) place two providers side by side across every rubric feature. We show the raw score for each feature, highlight where one provider leads, and summarize the trade-offs in plain language. We do not declare an overall leader when the margin is within half a point, because at that range personal preferences (price vs coverage, app quality vs support) matter more than aggregate scores.
How scores are applied
Every score comes from the rubric above, applied the same way to all 5 providers. Affiliate commissions fund the research. When we update a score, we publish the date and reason for the change.
Update schedule
Pricing data: refreshed weekly by checking each provider's public storefront and recording the displayed plan price with a UTC timestamp. Feature audits: monthly re-assessment of app quality, support channels, and refund terms. Provider reviews and matchup pages: updated within 72 hours of any material change (new plan tiers, coverage expansion, app redesign, or policy update). Country-level comparison data is audited quarterly against live provider catalogs.
Data sources and verification
Plan pricing is sourced directly from each provider's official website or app. Network references come from carrier-published technology and coverage maps for each destination. App features are recorded from each provider's own app listing and help pages at the time of each monthly audit. Support channels are recorded from each provider's own help centre and contact page. We publish no speed measurements, no support response times and no app store ratings, because we do not run a test lab and will not present another company's numbers as our own.
Methodology last verified:
Correction policy
When we find a scoring error or stale data point, we correct it within 24 hours and note the change date on the affected page. Reader-reported inaccuracies are verified against the provider's current storefront within one business day. Confirmed corrections are published with an attribution note. Historical scores are retained in our internal audit log.
For background on our team and editorial principles, see our about page.
Score rubric
Score definitions by dimension
Each provider receives a 1-5 score per dimension. The table below defines what each score means in concrete terms.
| Score | Coverage | Network Generation | App | Pricing | Support |
|---|---|---|---|---|---|
| 5 | 200+ countries | 5G on a Tier-1 carrier in most markets | Automatic install plus real-time usage tracking | <$3/GB | 24/7 live chat plus WhatsApp and email |
| 4 | 150-199 countries | 5G in major cities, 4G LTE elsewhere | In-app install plus usage tracking | $3-4/GB | 24/7 live chat plus email |
| 3 | 100-149 countries | 4G LTE nationwide | In-app install, basic usage tracking | $4-5/GB | In-app chat plus email |
| 2 | 50-99 countries | 4G LTE in cities only | QR install, no usage tracking | $5-7/GB | Email only, published hours |
| 1 | <50 countries | 3G fallback common | QR install only, no plan management | >$7/GB | Email only, no published hours |
Worked example
How scores produce a ranking: Japan
Equal-weight calculation using each provider's dimension scores. All five dimensions weighted at 0.20.
| Provider | Coverage (0.20) | Network Generation (0.20) | App (0.20) | Pricing (0.20) | Support (0.20) | Total |
|---|---|---|---|---|---|---|
| HelloRoam | 4.5 | 4.3 | 5.0 | 4.4 | 5.0 | 4.64 |
| Airalo | 4.9 | 4.4 | 4.7 | 4.1 | 4.2 | 4.45 |
| Holafly | 4.3 | 4.2 | 4.1 | 4.5 | 4.7 | 4.35 |
| Nomad | 3.9 | 4.3 | 3.9 | 4.8 | 3.9 | 4.15 |
| Saily | 4.0 | 4.4 | 4.5 | 4.0 | 4.1 | 4.20 |
The weighted total determines ranking order. For Japan, every provider uses a Tier-1 local carrier (SoftBank, NTT Docomo, KDDI au), so network scores cluster tightly. The ranking spread comes from coverage breadth, pricing structure, and app quality.
The same formula applies to every country page. When two providers score within 0.10 points, we note the margin as negligible and list both as strong options rather than declaring a single leader.
Common eSIM Questions
eSIM vs Google Fi
Travel eSIM providers offer data in 160 to 200-plus countries from $3.00/GB. Google Fi covers 200+ countries at $10/GB after the plan limit. eSIM providers cost less for short trips. Google Fi works better for US residents who want one plan at home and abroad. HelloRoam scores 4.6/5 in our comparison matrix.
Read more →eSIM For Apple Watch
Apple Watch Series 3 and later support eSIM for cellular connectivity. Travel eSIM providers do not support Apple Watch directly. Apple Watch eSIM requires a carrier plan (AT&T, T-Mobile, Verizon, EE, Vodafone). Number sharing with your iPhone plan costs $5-10/month.
Read more →eSIM Not Working
eSIM not working: 1) enable data roaming in settings, 2) verify your device supports eSIM (iPhone XS or later, most 2020+ Android phones), 3) check carrier coverage in your area, 4) toggle airplane mode on and off, 5) reset network settings. Contact your eSIM provider if activation fails.
Read more →