Best eSIM guide · 2026
Best eSIM Plans for United Kingdom (2026): Side-by-Side
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
United Kingdom 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 |
 NomadMost competitive per-GB rates | 4.2 | $3.00/GB |
 HolaflyStrongest unlimited tier | 4.3 | $2.99/day |
 SailyLeading privacy integration | 4.2 | $3.99/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
United Kingdom spec-by-spec breakdown
Every rubric dimension compared side by side.
| Feature | HelloRoam | Airalo | Nomad | Holafly | Saily |
|---|---|---|---|---|---|
| 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 | $3.00/GB | $2.99/day | $3.99/GB |
| Per-GB Floor | $3.50 | $4.50 | $3.00 | $2.99/day | $3.99 |
| Founded | 2025 | 2019 | 2020 | 2017 | 2023 |
| Headquarters | United Kingdom | Singapore | Santa Clara, CA | Murcia, Spain | Vilnius, Lithuania |
| 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 | 3.9 | 4.3 | 4.0 |
| Pricing Tiers score20% weight, 0-5 on our rubric | 4.4 | 4.1 | 4.8 | 4.5 | 4.0 |
| Network Generation score20% weight, 0-5 on our rubric | 4.3 | 4.4 | 4.3 | 4.2 | 4.4 |
| App Features score20% weight, 0-5 on our rubric | 5.0 | 4.7 | 3.9 | 4.1 | 4.5 |
| Support Channels score20% weight, 0-5 on our rubric | 5.0 | 4.2 | 3.9 | 4.7 | 4.1 |
| Weighted Composite | 4.64 | 4.45 | 4.15 | 4.35 | 4.20 |
Score breakdown
United Kingdom provider scores
Weighted composite score across 5 dimensions.
Destination data
What the United Kingdom rows actually say
3 tracked networks, 7 plan tiers, cheapest tracked rate 0.66 per GB.
| Local network | Generations tracked |
|---|---|
| O2 | 5G |
| T-Mobile UK | 5G |
| 3 | 4G |
| Days | Plan price | Per day | Off the 1-day rate |
|---|---|---|---|
| 1 | $2.68 | $2.68 | 4% |
| 3 | $7.70 | $2.57 | 8% |
| 7 | $17.97 | $2.57 | 8% |
| 14 | $34.76 | $2.48 | 11% |
| 30 | $68.63 | $2.29 | 18% |
Rows come from this comparison's own United Kingdom 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 splits UK coverage across O2, T-Mobile UK, and Three, and its $15.93 10GB plan works out to $1.59/GB, the cheapest fixed rate among the five providers. HelloRoam scores 4.64/5 on the rubric overall, with App 5.0 and Support 5.0 on an iOS and Android app, live chat plus WhatsApp, unlimited from $5, and a 180-day refund. Coverage at 4.5 trails Airalo's 4.9, while plans from $3.50/GB beat Airalo's pricing score (4.1).
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 routes UK traffic through EE, reaching 99% of the population on 4G LTE, and posts an App score of 4.7, behind HelloRoam's App 5.0. HelloRoam wins on price for a UK-only trip though, charging $15.93 for 10GB against Airalo's $4.50/GB rate, a gap of about $29 at equal volume.
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
Nomad -- Best Budget Per-GB Rate
Nomad's matrix-leading pricing score (4.9) comes from its Southeast Asia rates, not the UK, where its per-GB cost climbs toward $3 to $5 without that regional discount. HelloRoam's $15.93 10GB plan and Saily's $3.99/GB fixed rate both beat Nomad's UK pricing by a wide margin.
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
Holafly -- Best Unlimited Daily Rate
Holafly also rides EE's network in the UK and prices its unlimited plan at $2.79/day, the lowest unlimited rate in this comparison and a fit for the UK's 1.5GB average daily use. Holafly's pricing score (4.8) beats HelloRoam's 4.4 and Saily's 4.2, though its 4.1 App score trails HelloRoam's App 5.0 and Saily's 4.5.
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
Saily -- Best for Privacy
Saily routes UK traffic through Vodafone and bundles NordVPN free on every plan, useful given how often UK travelers lean on pub, train, and Tube WiFi instead of cellular data. Saily's 4.5 App score trails HelloRoam's App 5.0, and its fixed-only $3.99/GB lineup skips the unlimited tier Holafly offers at $2.79/day.
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
From the matrix
HelloRoam — Top composite rating
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FAQ
United Kingdom eSIM questions, answered
Which provider has the best coverage in the UK?
Which provider has the best coverage in the UK?
HelloRoam leads the 2026 composite at 4.64/5 in our comparison matrix for the United Kingdom. Airalo leads coverage 4.9 vs HelloRoam's 4.5, with UK traffic routed through EE's network reaching 99% of the population. HelloRoam splits coverage across O2, T-Mobile UK, and Three. For most UK-only trips, the coverage gap between the two matters less than the price difference.
How do eSIM speeds compare in the UK?
How do eSIM speeds compare in the UK?
The UK runs 5G across all major cities, on par with France in this comparison. EE delivers the strongest 5G in London, Three holds up in the Scottish Highlands, and rural Wales shows signal gaps on every carrier regardless of provider.
Which eSIM has the cheapest per-GB rate for the UK?
Which eSIM has the cheapest per-GB rate for the UK?
HelloRoam prices a 10GB UK plan at $15.93, about $1.59 per GB, the lowest fixed rate among the five providers compared. Saily follows at $3.99/GB, and Airalo's $4.50/GB floor is the highest. Holafly's $2.79/day unlimited plan wins instead for travelers using more than roughly 6GB a day.
Does Three UK's free EU roaming change which eSIM I need?
Does Three UK's free EU roaming change which eSIM I need?
Three UK's own SIM includes free EU roaming, but that benefit applies to a physical Three SIM, not to eSIM providers like HelloRoam, Airalo, Holafly, Saily, or Nomad. Travelers continuing into Europe after the UK still need a separate e-sim plan or a regional bundle like Airalo's Eurolink.
Which eSIM app has the best rating for UK travel?
Which eSIM app has the best rating for UK travel?
HelloRoam leads App at 5.0 on iOS and Android, ahead of Airalo's 4.7. Saily follows at 4.5, Holafly at 4.1, and Nomad at 3.9. App quality affects setup speed and data tracking, while network performance depends on which carrier each provider routes through.
Is Saily's VPN useful for a UK business trip?
Is Saily's VPN useful for a UK business trip?
Saily bundles NordVPN free on every plan, a practical feature for UK business travelers relying on hotel, train, and coworking WiFi between meetings in London, Manchester, or Edinburgh. HelloRoam, Airalo, Holafly, and Nomad all charge extra for VPN access or skip it entirely.
How does HelloRoam's UK pricing compare to Airalo's?
How does HelloRoam's UK pricing compare to Airalo's?
HelloRoam scores 4.64 composite vs Airalo 4.45. HelloRoam prices a 10GB UK plan at $15.93, while Airalo's $4.50/GB rate works out to roughly $45 for the same 10GB. Airalo leads coverage 4.9 vs 4.5. HelloRoam leads App 5.0 vs Airalo 4.7. The $29 price gap favors HelloRoam for UK-only trips.
Compare all 5 providers for United Kingdom
Side-by-side scoring. Plans from $2.99/day to $4.50/GB. Verified June 2026.