Best eSIM guide · 2026
Guam eSIM Providers Ranked (2026): Feature Matrix
5 providers scored across coverage, pricing, speed, app quality, and support. All data verified June 2026.
From the matrix
HelloRoam — Top composite rating
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The comparison
Guam eSIM providers compared
All 5 providers ranked by weighted composite score. Color-coded by value.
| Provider | Rubric score (0-5) | From / GB |
|---|---|---|
 HelloRoamHighest scoreTop composite rating | 4.6 | from $3.50/GB |
 AiraloWidest coverage catalogue | 4.5 | $4.50/GB |
 SailyLeading privacy integration | 4.2 | $3.99/GB |
 HolaflyStrongest unlimited tier | 4.3 | $2.99/day |
 NomadMost competitive per-GB rates | 4.2 | $3.00/GB |
Prices verified June 2026. Equal-weight score: Coverage Breadth 20%, Pricing Tiers 20%, Network Generation 20%, App Features 20%, Support Channels 20%.
Feature matrix
Guam spec-by-spec breakdown
Every rubric dimension compared side by side.
| Feature | HelloRoam | Airalo | Saily | Holafly | Nomad |
|---|---|---|---|---|---|
| Overall rating (0-5, our rubric) | 4.6 | 4.5 | 4.2 | 4.3 | 4.2 |
| Countries | 186+ | 200+ | 200+ | 160+ | 200+ |
| Starting Price | from $3.50/GB | $4.50/GB | $3.99/GB | $2.99/day | $3.00/GB |
| Per-GB Floor | $3.50 | $4.50 | $3.99 | $2.99/day | $3.00 |
| Founded | 2025 | 2019 | 2023 | 2017 | 2020 |
| Headquarters | United Kingdom | Singapore | Vilnius, Lithuania | Murcia, Spain | Santa Clara, CA |
| Support | Live chat + WhatsApp + email | Email + in-app chat | Email only | 24/7 chat + email | Email only |
| Guarantee | 180-day refund | 14-day refund | 30-day refund | 180-day refund | 30-day refund |
| Coverage Breadth score20% weight, 0-5 on our rubric | 4.5 | 4.9 | 4.0 | 4.3 | 3.9 |
| Pricing Tiers score20% weight, 0-5 on our rubric | 4.4 | 4.1 | 4.0 | 4.5 | 4.8 |
| Network Generation score20% weight, 0-5 on our rubric | 4.3 | 4.4 | 4.4 | 4.2 | 4.3 |
| App Features score20% weight, 0-5 on our rubric | 5.0 | 4.7 | 4.5 | 4.1 | 3.9 |
| Support Channels score20% weight, 0-5 on our rubric | 5.0 | 4.2 | 4.1 | 4.7 | 3.9 |
| Weighted Composite | 4.64 | 4.45 | 4.20 | 4.35 | 4.15 |
Score breakdown
Guam provider scores
Weighted composite score across 5 dimensions.
Destination data
What the Guam rows actually say
1 tracked network, 6 plan tiers, cheapest tracked rate 3.74 per GB.
| Local network | Generations tracked |
|---|---|
| GTA Wireless | 4G |
| Days | Plan price | Per day | Off the 1-day rate |
|---|---|---|---|
| 1 | $13.62 | $13.62 | 4% |
| 3 | $39.16 | $13.05 | 8% |
| 7 | $91.38 | $13.05 | 8% |
| 14 | $176.81 | $12.63 | 11% |
| 30 | $349.07 | $11.64 | 18% |
Rows come from this comparison's own Guam country data. The ladder prices one destination only; the composite scores above are provider-level and do not move with it.
Methodology
How we score eSIM providers
Five dimensions, each weighted at 20 percent.
Country count, carrier partnerships, regional bundle availability
Per-GB floor, plan tier spread, value at common data amounts
Carrier routing and which network generations that carrier publishes
Installation flow, data tracking, interface quality
Channel availability and refund policy
All scores are editorial assessments based on verified data. Pricing checked weekly. See our full scoring methodology for details.
HelloRoam -- Highest Composite Score
HelloRoam scores 4.64/5 on our rubric overall for Guam, with App 5.0 and Support 5.0 on an iOS and Android app, live chat plus WhatsApp, and a 180-day refund. Plans price from $3.50/GB, just under the territory's own $3.74/GB tracked floor set by its 20GB plan. Its 204+ carrier partnerships and 63-language checkout carry real weight for non-US travelers visiting Guam who don't already hold a domestic US plan covering the island.
Dimension scores, 0-5 on our rubric
Pros
- 186 countries with 204+ carrier partnerships for reliable local routing
- Fixed plans from $3.50/GB across popular destinations
- Unlimited plans from $5 for short stays, scaling by duration
- iOS and Android app with in-app top-up, add-destination, and usage alerts
- Live chat, WhatsApp, and email support, including real-time channels
- 31+ local currencies supported at checkout
- 63-language interface for non-English travelers
Cons
- Newer brand (launched August 2025) with shorter track record
- 186 countries, behind Airalo's 200+ catalogue
Airalo -- Widest Coverage Catalogue
Airalo's $4.50/GB starting rate sits above Guam's own $3.74/GB tracked floor on the 20GB plan, one of the few destinations in this comparison where the territory's own per-GB rate beats Airalo's baseline. Its Discover Global bundle, covering up to 130 countries on one eSIM, still suits travelers routing Guam into a wider Pacific or Asia itinerary despite the higher per-GB entry price.
Dimension scores, 0-5 on our rubric
Pros
- 200+ countries with the widest coverage breadth in the market
- Regional multi-country bundles (Asialink, Eurolink, Discover Global)
- Automatic in-app install with real-time data tracking and hourly runtime estimates
- Airmoney cashback rewards (5-10% depending on loyalty tier)
- Established brand since 2019 with proven reliability
Cons
- Per-GB pricing higher than budget alternatives
- Unlimited plans available in select markets only, not all 200+ destinations
- No live chat or WhatsApp channel: support runs on email and in-app messaging
Saily -- Best for Privacy
Saily prices Guam at $3.99/GB with a bundled NordVPN connection at no extra cost, useful since VPN access stays unrestricted per enrichment data. Its 200-country footprint and 4.6/5 on this scorecard App score sit close to Guam's own $3.74/GB comparison floor, making the bundled VPN the stronger differentiator here than raw price.
Dimension scores, 0-5 on our rubric
Pros
- Backed by NordVPN parent company Nord Security with proven privacy infrastructure
- Integrated VPN protection included on every plan at no extra cost
- Clean, privacy-focused app with VPN toggle inside the eSIM interface
- 200 countries with strong European coverage
- 30-day refund policy
Cons
- Email-only support with no live chat or WhatsApp for urgent help
- Fixed data plans only; no unlimited daily tier
- 200 countries, just behind Airalo's 200-plus
Holafly -- Best Unlimited Daily Rate
Holafly's $2.99/day unlimited rate carries the same 2GB daily volume threshold tracked for Guam before its fair-use throttle applies, and its 4.5/5 on our rubric Pricing score trails only Nomad's 4.8/5. Guam's own unlimited tier tops out at $11.64 per day on the 30-day plan, so Holafly's flat rate still beats the territory's longest tracked unlimited option.
Dimension scores, 0-5 on our rubric
Pros
- Unlimited daily data from $2.99/day with no data caps
- 160+ countries covered including all major destinations
- Simple per-day pricing: know exactly what you pay before you leave
- 180-day refund policy on unused plans
- 24/7 chat support alongside email
Cons
- Speeds reduce after the daily fair use threshold on most plans
- Hotspot tethering limited to 1 GB/day on select destinations
- Not cost-effective for light data users (under 3 GB/trip)
- Fewer countries than Airalo
Nomad -- Best Budget Per-GB Rate
Nomad's $3.00/GB rate is the lowest fixed floor across all five providers, undercutting Guam's own $3.74/GB tracked rate by a real margin. Its email-only support window is the thinnest of the five, a real consideration for a US territory where connectivity questions during a short trip come up fast.
Dimension scores, 0-5 on our rubric
Pros
- Competitive pricing starting from $3.00/GB in Southeast Asia
- Simple, fast checkout with no account required in many cases
- Lowest per-GB rates for Thailand, Vietnam, South Korea, and Japan
- Plans start at a low entry price for short trips
Cons
- Email-only support with no live chat, WhatsApp, or phone channel
- Basic app compared to Airalo and Saily
- 200 countries, behind only Airalo among the five providers
- Limited plan variety in some countries
From the matrix
HelloRoam — Top composite rating
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FAQ
Guam eSIM questions, answered
Which eSIM has the cheapest per-GB rate for Guam?
Which eSIM has the cheapest per-GB rate for Guam?
This comparison's Guam data floors at $3.74/GB on the 20GB plan. Among the five providers, Nomad's $3.00/GB is the lowest, followed by HelloRoam at $3.50/GB, just under Guam's own tracked floor. Saily and Airalo both price above Guam's own rate, and Holafly's $2.99/day removes per-GB math entirely.
Do I need an eSIM in Guam if I already have a US phone plan?
Do I need an eSIM in Guam if I already have a US phone plan?
Not always. Enrichment data confirms Guam is a US territory, and many domestic US carrier plans already include the island without extra roaming charges. Travelers on a US plan should check their carrier's coverage map first. Those on a foreign plan, or without US service, still need an eSIM or local SIM to connect.
Does Guam have 5G eSIM coverage?
Does Guam have 5G eSIM coverage?
No. This comparison tracks only 4G for Guam, carried by GTA Wireless, the sole network type recorded across all five providers compared here. Enrichment data lists DOCOMO Pacific as a second local carrier, though this comparison's eSIM routing tracks GTA Wireless specifically as the only network type.
Does a VPN work with a Guam eSIM?
Does a VPN work with a Guam eSIM?
Yes. Enrichment data lists Guam's VPN status as unrestricted, so a VPN app works alongside any of the five eSIM providers compared here. Saily bundles a NordVPN connection into every plan at no extra cost, an option worth weighing against a separately downloaded VPN app.
Does buying a bigger data plan lower the per-GB cost in Guam?
Does buying a bigger data plan lower the per-GB cost in Guam?
Yes, in this comparison's data. The 1GB plan costs $7.99 per GB, while the 20GB plan drops to $3.74 per GB, a 53% reduction across the five tracked plan sizes. Larger fixed-data plans price lower per gigabyte than smaller ones throughout Guam's lineup.
Does Guam offer a 30-day unlimited eSIM plan?
Does Guam offer a 30-day unlimited eSIM plan?
Yes. This comparison's Guam data includes a full 30-day unlimited tier, priced at $349.07, working out to $11.64 per day, an 18% discount off the plan's base per-day rate of $14.19. Holafly's $2.99/day flat unlimited rate still undercuts Guam's own longest tracked unlimited option by a wide margin.
Which eSIM offers the best support for a Guam trip?
Which eSIM offers the best support for a Guam trip?
HelloRoam leads the 2026 composite at 4.64/5 in our comparison matrix for Guam, with Support 5.0 on live chat, WhatsApp, and email. Holafly scores 4.6/5 on our 2026 rubric on Support, with 24/7 chat and WhatsApp alongside email. Airalo follows at 4.5/5 on our rubric with email and in-app chat. Saily and Nomad are email-only, with no real-time channel between them.
Compare all 5 providers for Guam
Side-by-side scoring. Plans from $2.99/day to $4.50/GB. Verified June 2026.