Thailand is one of the easiest countries to stay connected thanks to excellent mobile coverage and affordable eSIM options. However, with so many providers advertising "cheap" or "unlimited" plans, choosing the right Thailand eSIM can be confusing.

This guide breaks down the best Thailand eSIMs in 2025, explaining which ones are truly worth buying—and which ones come with hidden downsides.

Nomad: Cheapest on Paper, But With a Big Catch

Nomad currently offers the cheapest 50 GB Thailand eSIM, priced at just $9 USD for 10 days. On the surface, this looks like the best deal.

However, Nomad requires the eSIM to be installed only after you arrive in Thailand. That means:

No mobile data when your plane lands

You must rely on airport WiFi to install and activate the eSIM

Activation can be stressful if WiFi is slow or unavailable

Saving one dollar is rarely worth the inconvenience, especially after a long flight. For most travelers, this is a deal-breaker.

Best Overall Thailand eSIM: Airalo & SimOptions

Airalo and SimOptions are consistently rated as the best overall Thailand eSIM providers, mainly because they sell the DTAC Happy Tourist 5G eSIM.

Traveltomtom rates this DTAC eSIM as the best Thailand eSIM for 2025.

Why DTAC Happy Tourist eSIM Is So Popular

True unlimited data (no throttling, no Fair Use Policy)

Includes calling and SMS

Comes with a real Thai phone number (+66)

Free incoming calls and SMS

Nationwide 5G coverage

Tested and verified in July 2025

Available plans include:

50 GB data + 100 minutes for 10 days at around $9.90

Unlimited data, calls, and SMS for 15 days at around $19.90

Unlimited data, calls, and SMS for 30 days (available via Airalo)

One important thing to note: validity starts immediately after installation, even if you are not yet in Thailand. You have 30 days after purchase to install the eSIM.

Cheapest Reliable Alternative: Jetpac

Jetpac is one of the most popular budget-friendly Thailand eSIM providers and is highly recommended for travelers who only need data.

Jetpac's standout advantage is that it runs on the AIS network, which generally offers faster speeds and better coverage than DTAC.

Why Travelers Like Jetpac

Excellent price-to-data ratio

Install before travel, activate only when you connect in Thailand

Valid for up to 1 year before installation

Free VPN subscription

Free airport lounge access if your flight is delayed (registration required)

Jetpac's most popular Thailand plan is 50 GB for 10 days at $10 USD, making it one of the best value eSIMs available.

Keep in mind:

Jetpac eSIMs are data-only

No phone number, calls, or SMS

Messaging apps like WhatsApp, LINE, or Telegram work perfectly

Overpriced Option: Holafly

Holafly offers unlimited data eSIMs for Thailand, but at a significantly higher price. For example, a 10-day unlimited plan costs close to $37 USD, which is difficult to justify when Airalo and SimOptions offer unlimited data with calls and SMS for almost half the price.

Thailand eSIM Discount Codes

You can save extra money by using these verified coupon codes:

Jetpac: TOMTOM10 for 10% off (first-time users)

SimOptions: TRAVELTOMTOM for 10% off

Airalo: TOMTOM3 for $3 USD off

Holafly: TRAVELTOMTOM for 5% off

If you install the SimOptions app and use TOM10, you can stack additional savings.

Final Recommendation: Which Thailand eSIM Should You Buy?

Choose Airalo or SimOptions if you:

Want unlimited data plus calls and SMS

Need a Thai phone number

Prefer a stress-free, all-in-one travel eSIM

Choose Jetpac if you:

Only need mobile data

Want the best value for money

Prefer AIS network speed and coverage

Before purchasing any Thailand eSIM, always check that your phone is eSIM compatible and carrier unlocked.

For most travelers in 2025, Airalo and SimOptions remain the safest and most complete Thailand eSIM options, while Jetpac is unbeatable for cheap, reliable data.