Best eSIM guide · 2026
Best eSIM for San Francisco (2026): Full Comparison
5 providers scored across coverage, pricing, speed, app quality, and support. All data verified June 2026.
From the matrix
HelloRoam — Top composite rating
Affiliate link. We may earn a commission at no extra cost to you.
The comparison
San Francisco 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
San Francisco 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
San Francisco provider scores
Weighted composite score across 5 dimensions.
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 San Francisco, 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, the second-lowest fixed rate among the five compared, though still well above the city's own $1.06/GB local floor, with unlimited from $5. This comparison's country data lists Airalo as the default routing provider for the United States, though HelloRoam's per-GB rate undercuts it.
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 scores 4.45/5 on this scorecard in this comparison's matrix and prices San Francisco plans from $4.50/GB, more than four times the city's own $1.06/GB local floor. Its 200-plus-country footprint suits a San Francisco stop paired with a wider West Coast or international itinerary, and its 4.9/5 on the rubric Coverage score is the highest among the five compared.
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 San Francisco plans from $3.99/GB and bundles a NordVPN connection into every plan at no extra cost, though US enrichment data lists VPN use as unrestricted, so the bundled VPN works as a general privacy layer here rather than a way around any local block. Saily has no regional bundle for the United States. Its 200-country footprint suits a San Francisco stop paired with international travel beyond the US.
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 unlimited plan starts at $2.99/day, below San Francisco's own $3.49/day local unlimited rate, and its 2GB daily volume before the fair-use throttle covers a moderate day of maps and messaging across the city's hills and neighborhoods. HelloRoam also sells unlimited from $5. Holafly's 24/7 chat support runs around the clock.
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 in the matrix, though San Francisco's own $1.06/GB local price still runs under it by nearly two dollars. Nomad has no regional bundle for the United States. Its 200-country footprint sits behind only Airalo's 200-plus, a bigger factor if a San Francisco trip continues into a country outside Nomad's usual Southeast Asia strength.
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
Affiliate link. We may earn a commission at no extra cost to you.
FAQ
San Francisco eSIM questions, answered
Who leads the San Francisco eSIM comparison?
Who leads the San Francisco eSIM comparison?
HelloRoam leads the 2026 composite at 4.64/5 in our comparison matrix. Airalo, Holafly, Saily, and Nomad follow on coverage breadth, daily unlimited, privacy, and per-GB pricing.
Which eSIM has the cheapest per-GB rate for San Francisco?
Which eSIM has the cheapest per-GB rate for San Francisco?
Nomad's $3.00/GB is the lowest fixed rate among the five providers compared, followed by HelloRoam at $3.50/GB. The US local carrier floor runs cheaper at $1.06/GB, though a local prepaid SIM prices from $30-50 for 10-30GB, well above every one of the five eSIM options.
Do I need an eSIM for a new iPhone in San Francisco?
Do I need an eSIM for a new iPhone in San Francisco?
If the phone is a US model from the iPhone 14 onward, yes. Those models ship without a physical SIM tray, making an eSIM the only supported option regardless of which of HelloRoam, Airalo, Holafly, Saily, or Nomad a traveler picks.
Does 5G work outside San Francisco on a road trip?
Does 5G work outside San Francisco on a road trip?
Mostly along interstates, less so in remote terrain. T-Mobile's 5G covered most interstate highways in this comparison's coverage records, but significant dead zones appeared in national parks and rural stretches of Montana, Wyoming, and Nevada, terrain a San Francisco road trip toward the Sierra Nevada or beyond would cross.
Compare all 5 providers for San Francisco
Side-by-side scoring. Plans from $2.99/day to $4.50/GB. Verified June 2026.