⚡ The short version
If Vietnam is your only stop, a local Vietnamese plan wins on price and it is not close — $17 against $73.90 for thirty days of uncapped data. If your trip crosses three or more borders, a regional plan is the better buy and we will say so plainly. The line sits at about three countries.
We sell Vietnamese SIM and eSIM plans, so read this knowing what we are. What we have done instead of hiding that is take every competitor price straight from their own product pages on 30 September 2026 rather than from a comparison site, and then tell you the cases where they beat us. There are some.

The prices, side by side

Two things get compared here. A local plan is a Vietnamese network’s own package, sold to you as a customer of that network. An international travel eSIM is a package sold by a global company that reaches Vietnamese towers through a roaming arrangement. Holafly is the biggest of those by review volume, so it is the one we price against.

Both are eSIMs. Both install by scanning a QR code. The difference that matters to your wallet is who you are on the network.

Uncapped dataEntryVN (Vinaphone eSIM)Holafly Vietnam
7 days$12$27.50
15 days$14$50.50
30 days$17$73.90

Holafly prices read off esim.holafly.com on 30 September 2026. Ours are the eSIM versions from our shop; the physical SIM equivalents are $10, $12 and $15, and plans start at $9.

Why the gap exists A local plan makes you a direct customer of the Vietnamese network at Vietnamese domestic prices. A travel eSIM buys wholesale access through a roaming agreement and resells it to you in dollars, with a global app, 24/7 multilingual support and a brand behind it. You are paying for the layer, not for better signal.

We are not going to tell you the international eSIMs are slow or unreliable, because we have not measured them and neither has anyone who says so in a blog post. What we can tell you is the structural difference: a roaming visitor and a domestic subscriber are handled differently by any network in the world, and only one of them pays domestic rates.

Vietnamese plans, from $9

Nine packages across Vinaphone, Mobifone and Viettel — physical SIM or eSIM, 7 to 30 days.

See the plans →

The quirk that decides it: one country costs the same as sixteen

Here is the thing we did not expect when we went through Holafly’s own pages. Their Vietnam plan, their seven-country Southeast Asia plan and their sixteen-country Asia plan are all priced identically. Thirty days is $73.90 whichever one you pick.

Holafly planCovers7 days30 days
Vietnam1 country$27.50$73.90
Southeast Asia7 — Cambodia, Indonesia, Laos, Malaysia, Singapore, Thailand, Vietnam$27.50$73.90
Asia16 countries$27.50$73.90

That single fact settles most of this article. If you are buying Holafly at all, never buy their Vietnam-only plan — the Southeast Asia one costs exactly the same and covers six more countries you might end up in. And if Vietnam really is your only stop, the comparison is $17 against $73.90, which is not a close call.

When the international eSIM is genuinely the right choice

Here is the case we would make for Holafly if we sold nothing at all.

For a Bangkok → Siem Reap → Ho Chi Minh City → Kuala Lumpur run, one purchase covers the whole trip. The eSIM finds a partner network in each country by itself. You land, your phone connects, you carry on. No queue at an arrivals-hall counter, no second QR code, no working out which Cambodian operator is which at eleven at night.

That convenience is real and we are not going to pretend otherwise. Holafly rates 4.6 on Trustpilot from over 113,000 reviews, which is the largest verified review base of any travel eSIM company. A brand does not get there by accident.

Crossing three or more borders?

Then we are not your best option and we would rather say so. Holafly’s Southeast Asia plan covers seven countries including Vietnam on one purchase — and code ENTRYVN takes 5% off.

See Holafly’s regional plans →
The threshold is about three countries One or two countries: local plans in each, bought separately, usually still come out cheaper — often much cheaper, as the table above shows. Three or more: the regional plan wins, and it wins on hassle before it wins on money.

What you give up with either one

Two things are worth knowing before you buy anything.

“Unlimited” is a word with terms attached

Across this whole industry, packages sold as unlimited carry fair-use conditions. Holafly publishes theirs: network operators may temporarily reduce speed to manage traffic, for no more than one day at a time, and hotspot sharing is capped at 1 GB per day. Read the fair-use clause of whichever plan you buy, ours included. We would rather you check than take our word for it.

Neither option gives you a phone number

This applies to both sides and we want to be blunt about our own product here. Our plans are data only. No Vietnamese number, no outgoing calls, no incoming calls, no SMS. Holafly say the same about theirs. If you are choosing between a local plan and a regional plan, voice is not a tiebreaker — neither has it.

What that means in practice, and it is less of a problem than it sounds:

  • Ride-hailing works. Grab and Be both let the driver contact you inside the app over data, so you do not need a number for a driver to reach you.
  • Messaging and calls work through WhatsApp, Zalo, Messenger, FaceTime — anything that runs over data.
  • What does not work: receiving an SMS verification code on a Vietnamese number, and being phoned by a hotel or restaurant that only has a phone line.
Keep your home SIM in slot one If your phone is dual-SIM or dual-eSIM, leave your normal number active for incoming texts from your bank and use the Vietnamese plan for data only. Switch off roaming on the home number so it carries no data charges. That combination gives you a working number and cheap data at the same time.

If you barely use data, the gap gets wider, not smaller

Holafly sells unlimited plans and nothing else — there is no small, cheap package for someone who just needs maps and a few messages over four days. Their shortest plan is three days at $11.90.

Ours start at $9 and run seven days. So the light user on a short trip is the case where buying locally wins by the widest margin, not the narrowest. If you stream, tether a laptop or upload video, the thirty-day comparison in the first table is the one that applies to you instead.

How quickly you actually get it

A fair objection to buying local: the global platforms have polished apps and instant automated delivery, and a smaller operation might leave you waiting.

In practice ours arrives within minutes of payment. A person creates your eSIM and sends the QR code and the installation steps. It is not an automated pipeline and we are not claiming it is one — but a human reading your message also means that if something does not install, you are talking to someone who can fix it rather than to a help centre article.

Install it before you fly. An eSIM can be added to your phone on your home wifi and simply left switched off until you land — that applies to every provider mentioned on this page. Landing with the profile already installed is the single biggest difference between arriving connected and arriving hunting for wifi.

Do not throw away the physical-SIM option It is $2 cheaper than the eSIM at every tier and it works in phones that do not support eSIM at all — which still includes a lot of Android handsets and every iPhone older than the XS. Check your phone supports eSIM before you buy one.

What we would actually do

Your tripOur honest recommendation
Vietnam only, any lengthA local Vietnamese plan. $17 against $73.90 is too large a gap to argue with.
Vietnam plus one neighbourPrice both. Two local plans usually still win, but it is close enough to be worth ten minutes.
Three or more countriesA regional plan. Buy it, install it at home, stop thinking about it.
Short trip, light useLocal, clearly. Our plans start at $9; there is no cheap small package on the unlimited-only platforms.
Phone has no eSIM supportA physical Vietnamese SIM. Travel eSIM platforms cannot help you at all here.

And one option we would not pick: buying at an airport counter on arrival. The cheapest airport packages start around $12 and go up from there, you are negotiating in a crowded arrivals hall after a long flight, and you will have queued for immigration first. Sorting connectivity before you fly removes a task from the worst possible moment to be doing tasks. The full SIM and eSIM guide covers the airport counters in detail.

Arrive already connected

Order before you fly and your eSIM QR code reaches you within minutes. 7, 15 and 30-day plans from $9.

Browse plans →

Common questions

The regional plans can. Holafly’s Southeast Asia plan spans seven countries including Vietnam on a single purchase, and their Asia plan spans sixteen, switching partner networks automatically as you cross borders. Not every provider offers one, though — plenty sell country-by-country only. Check the product page for the word regional rather than assuming “international eSIM” means multi-country.

Check it yourself, which is why we have named the source. Open esim.holafly.com/esim-vietnam and look at the 30-day price. It was $73.90 on 30 September 2026 against our $17. Prices change, so if the gap has closed by the time you read this, believe the page and not us.

We have not benchmarked them and will not claim it. The one verifiable structural point is that a travel eSIM reaches the network as a roaming visitor while a local plan makes you a domestic subscriber. Anyone telling you they have measured a definite speed difference across Vietnam should be asked for their data.

We do not know their reasoning, but the pricing is published and identical across their Vietnam, Southeast Asia and Asia plans. The practical consequence for you is simple: if you are buying from them, there is no reason to take the single-country version.

Not with our plans — they are data only, with no number, no calls in or out and no SMS. Travel eSIMs are almost always the same. Grab and Be let drivers reach you in-app over data, and WhatsApp or Zalo cover calls, so in practice this rarely bites. If you need a number, keep your home SIM active alongside for texts and use the Vietnamese plan purely for data.

Yes, and you should. Install the profile on your home wifi and leave it turned off. When you land, switch it on. This works with every provider discussed here and it is the difference between walking out of the terminal connected and standing in arrivals looking for a signal.

Vietnamese airports do have free wifi, and it is usable when the terminal is quiet. The problem is what happens after you walk out of the doors, where it stops entirely — typically right when you need a ride-hailing app to find you. Wifi covers the terminal, not the journey.

Holafly prices, coverage and Trustpilot figures read directly from esim.holafly.com on 30 September 2026 and quoted in USD; they may change without notice. Holafly links on this page are affiliate links. Code ENTRYVN takes 5% off for you. Every price above was read from each provider’s own product page.