Holafly vs Saily: unlimited-with-terms vs by-GB
Key facts
- Holafly sells unlimited with conditions in its terms; Saily sells data packages by GB through its app — it is a model choice, not a signal-quality choice.
- Light data users often save with GB bundles; heavy or unpredictable users are safer on unlimited.
- VoaSim offers truly unlimited data with no cap, no throttling and no fair-use clause, at a price set by destination and trip length.
- VoaSim prices run from USD 16.90 for 5 days to USD 112.90 for 60 days, the lowest daily rate being USD 1.88.
- VoaSim does not cover the island Caribbean and does not work at sea on cruises — in those cases another option may suit you better.
See the exact price for your dates
"Holafly vs Saily" is really a question about two billing models, not two signal qualities. All three brands here ride the same local networks at your destination. What changes is how the data is sold, what happens when you use a lot of it, and what you pay when a trip runs long.
This page compares the models with qualitative facts only. It is not a lab speed test, and we do not quote competitor prices or ratings — those change and you should read them on each brand's own site or app.
How each model actually works
Holafly (Spain) sells plans marketed as unlimited. The detail lives in the terms: usage conditions and tethering limits are described there, so read them for your destination and duration before you buy.
Saily (Nord Security) sells data packages by GB, bought and managed in its app. You pick a country or region and a data bundle. When the bundle runs out, you top up.
VoaSim sells truly unlimited data: no data cap, no speed throttling, no hidden "fair use" clause. Price set by destination and trip length, across 160+ destinations on every continent. It is data-only — no phone number and no traditional voice calls, though WhatsApp, app calls and maps all work over data.
All three are eSIMs: a QR code or app profile, no plastic to swap, your home number stays on the phone. See our comparison hub for other match-ups.
By GB or unlimited: which one fits you
Answer one question: do you know how much data you use per day?
- Light user — maps, messaging, a few photos, hotel Wi-Fi at night. A small GB package (Saily-style) is often cheaper and perfectly enough.
- Heavy user — video calls with home, Reels on the train, Spotify and YouTube, Google Maps running all day, a laptop workday. Unlimited stops the math and the top-up anxiety.
- Unpredictable — long trips, several countries, a family sharing one phone for navigation. Unlimited is the safer bet.
The trap with by-GB plans is not the first purchase, it is the third top-up. The trap with "unlimited" plans is the fine print. That is why VoaSim states it flatly: no cap, no throttling, no fair-use asterisk. Sharing your connection (hotspot or tethering) is not allowed: the local carrier may block your line. Each traveler uses their own eSIM, and 2 or more eSIMs get an extra 10% off.
VoaSim prices: one table, every destination
Prices vary by destination; check yours in the simulator. Today's promo price (15% off) is already included.
| Duration | Price | Per day |
|---|---|---|
| 5 days | USD 16.90 | USD 3.38 |
| 7 days | USD 23.90 | USD 3.41 |
| 10 days | USD 30.90 | USD 3.09 |
| 15 days | USD 42.90 | USD 2.86 |
| 30 days | USD 62.90 | USD 2.10 |
| 60 days | USD 112.90 | USD 1.88 |
Trips of 1 to 4 days pay the 5-day package. Maximum 90 days per eSIM. A second eSIM in the same order gets 10% extra off — useful for couples. Payment is by international credit or debit card in USD through Stripe, no hidden fees, invoice by email. Check your exact price in the simulator.
Side-by-side decision checklist
| What matters | Holafly | Saily | VoaSim |
|---|---|---|---|
| Billing model | Unlimited with terms | Packages by GB | Truly unlimited, per duration |
| Cap / throttling | See its terms | Bundle size | None |
| Price varies by country | Check site | Check app | No — one table |
| Tethering | Limits in terms | Check terms | Not promised |
| Support | Brand channels | App / brand | Human, email + chat |
| Refund if it will not connect | Per policy | Per policy | 100% refund |
Be fair to the other two: if you are a two-day business traveler who only needs email and a map, a small GB package is cheap and sensible. If you already trust Nord Security products, having the eSIM in the same ecosystem has real value. Read more on how we work.
Europe, coverage gaps and the honest limits
Our Europe plan covers 39 countries with one eSIM, including Switzerland, the UK, Turkey, Norway and Iceland — no swapping profiles at the border. Connection to local networks is automatic on 4G and, where available, 5G.
What we do not cover right now: the island Caribbean — Dominican Republic, Cuba, Jamaica, Bahamas, Aruba, Curaçao. Puerto Rico works because it runs on US networks. On cruises, the eSIM works on land at ports, not at sea. If any of that is your trip, a different provider or your carrier's roaming may genuinely serve you better; compare in our roaming guide.
Compatibility is the usual eSIM rule: iPhone XR or newer, Galaxy S20 or newer, Pixel 3 or newer, most phones from 2020 on. Dial *#06# — if an EID appears, you have eSIM. Carrier-locked phones must be unlocked. We do not sell physical SIM cards.
Buying, installing and not wasting a day
The QR code arrives by email within minutes (a WhatsApp heads-up too, if you leave a number). Install before you fly, following the step-by-step guide for iPhone and Android in our guides.
Key rule: your days start counting at the eSIM's first connection to a network at the destination — not at purchase. So install at home, then keep the eSIM line switched off until you land. On Android, do not turn on the eSIM's data before the trip.
Your physical SIM and your number keep working, so WhatsApp stays on your usual number. Just turn off data roaming on your home carrier so it does not bill you in the background.
If anything goes wrong, our free eSIM Rescue tool diagnoses an eSIM with no signal — any brand, including ones you did not buy from us. And if your VoaSim eSIM will not connect and support cannot fix it, you get a 100% refund.
Why trust VoaSim?
Registered company with an invoice on every purchase, USD payment via Stripe with no hidden fees, 24/7 human support and a guarantee: if the eSIM will not connect and support cannot fix it, you get 100% back.