Best eSIM for Thailand: Which Plan Works for Bangkok, the Islands, and Chiang Mai
Verdict:For most trips to Thailand, buy the Airalo Maew eSIM: it runs on both True and AIS, 10 GB for 30 days is $11, and its unlimited plans give 5 GB of full speed per day. Buy Nomad if you want the cheapest fixed data on AIS and dtac, and skip Holafly unless you want unlimited data sold by the exact day, because it costs $27.50 for 7 days against Airalo's $21.
For most trips to Thailand, the Airalo Maew eSIM is the best eSIM to buy: it connects to both True and AIS, 10 GB for 30 days costs $11, and its unlimited plans give you a published 5 GB of full speed per day, which neither Nomad nor Holafly states. If you only want the cheapest fixed data, Nomad is a dollar cheaper at 10 GB. If you want unlimited data sold by the exact day, that is Holafly, at a clear premium.
The Thai network is the part most guides skip, and it matters more than the brand. Thailand has three main networks, AIS, True, and dtac, and which one your plan rides decides how it behaves on a beach, not the logo on the app. Prices below were read from each provider’s own page on October 12, 2026, and they change often, so confirm at checkout.
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Which Thai network matters
Nomad’s own Thailand guide says “AIS has the best island coverage of Thailand’s three networks,” and a Thai-run guide adds that coverage “can change from one side of an island to the other.” Forum answers are less tidy. In a Thai traveler Q&A thread, AIS drew the most praise for reception, while one poster wrote “I have ais and I found it awful for coverage” and switched to True, and a nine-year dtac user wrote that they “had perfect coverage never had a problem.”
The practical reading is that no single network wins everywhere. If your trip is mostly Bangkok, Chiang Mai, and Phuket, any of the three is fine. If you are island-hopping, an eSIM that includes AIS is the safer bet, and the plan listings below tell you which ones do.
Airalo (Maew): the best eSIM for Thailand for most trips
Airalo’s Thailand eSIM is called Maew, and its listing says it operates on the True and AIS networks, which gives you two of the three. The fixed plans are 1 GB for 3 days at $4, 5 GB for 7 days at $7, 5 GB for 30 days at $8, 10 GB for 30 days at $11, 20 GB for 30 days at $18, and 50 GB for 30 days at $27.50.
The unlimited plans are $9.50 for 3 days, $21 for 7 days, $31 for 10 days, $39 for 15 days, and $49 for 30 days. Full speed runs up to 5 GB per day, then drops to 1 Mbps. Airalo’s help centre also confirms hotspot works if your phone and the network support it.
The negative is the same as every provider here: the plan is data-only. Anything that sends a one-time code by text, including your bank, cannot reach this eSIM. You will need your home number active, or a local SIM, for that.
Nomad is the cheapest on fixed data, and it splits its networks by plan type. The fixed plans connect through AIS and dtac: 1 GB for 7 days is $5, 3 GB for 30 days is $6, 5 GB for 30 days is $8, and 10 GB for 30 days is $10. The unlimited plan, $15 for 10 days, connects through True.
There is one standout. A 50 GB plan for 10 days costs $15, runs on True, and includes unlimited data for Messenger, LINE, WhatsApp, WeChat, and KakaoTalk. For a heavy user on a 10-day trip, that is the best price per GB in this guide.
The negatives are real. The unlimited and 50 GB plans use True only, so they carry the weaker island reputation, and Nomad’s listing does not publish a daily full-speed cap for the unlimited plan. Its fixed plans are 30-day plans, so you pay for a month even on a 5-day trip, although the price is low enough that this rarely matters.
Holafly sells only unlimited plans for Thailand, and its listing says they run on True and DTAC. Pricing is by duration: 3 days is $11.90, 5 days is $20.50, 7 days is $27.50, 10 days is $36.50, 15 days is $50.50, and 30 days is $73.90. You pick the exact number of days, from 1 to 90.
The comparison is not flattering. A 7-day unlimited plan is $27.50 here against $21 at Airalo, and 30 days is $73.90 against $49. Holafly’s page says operators may restrict speeds for up to one day under a fair-use policy but publishes no daily number, and hotspot sharing is capped at 1 GB per day.
AIS is not in Holafly’s listed networks, which is the reason to be cautious if your trip is mostly islands.
Reddit review aggregators are thin on Thailand, so here is what we found. A GummySearch roundup of Reddit comments notes Airalo reported working in rural Thailand with 5G “most of the time.” In the Thai Q&A thread, Airalo was the most recommended eSIM (“try Airalo, better service”), but one poster called Airalo and Saily “not good for data,” so results vary by location.
That thread also had a common tip worth passing on. Several posters suggested a short airport eSIM for arrival, then a physical SIM from a 7-Eleven or phone shop for a longer stay, rather than buying at the airport counter. We did not test that route, so weigh it as reader advice, not a verdict.
Before you buy
Check the network on the plan page. The name of the eSIM is not the network, and island coverage differs by network.
Install the eSIM before you fly. Scan the QR code at home, then switch it on after you land in Bangkok.
Keep your home SIM active. Every plan here is data-only, so run your home line as a second SIM for bank codes. Our guide to eSIM vs physical SIM for travel covers that setup, and the best eSIM for international travel roundup covers regional plans if Thailand is one stop of several.
The decision
If you want one dependable plan for a normal trip, buy Airalo. 10 GB for 30 days is $11 on True and AIS, and unlimited plans give 5 GB per day.
If you want the cheapest fixed data, buy Nomad. 10 GB is $10 on AIS and dtac, and a 50 GB plan is $15 for 10 days, but the unlimited and 50 GB plans run on True only.
If you want unlimited by the exact day and no meter, buy Holafly. A 7-day plan is $27.50, but hotspot is capped at 1 GB per day and AIS is not listed.
If you are staying a month or more, price a local SIM too. A physical SIM from a Thai shop is the usual long-stay alternative, and one poster in the Thai thread cites a 150-baht, 30-day dtac unlimited SIM.
Airalo vs Holafly compared on real USD prices for Japan, Thailand, and Vietnam, daily data caps, hotspot rules, and who each eSIM is right for.
Verdict: Buy Airalo for most trips: it was cheaper than Holafly on every unlimited duration we checked in Japan, Thailand, and Vietnam, it sells fixed-GB plans that cost far less for light use, and it publishes its daily full-speed cap. Buy Holafly only if you want unlimited data sold by the exact day, from 1 to 90 days, and accept paying from $0.50 to about $25 more.
Airalo vs Saily compared on live prices, coverage, calls, apps, support, and Trustpilot scores, with a clear pick for each kind of trip.
Verdict: Airalo is the better default because its prices match Saily's almost to the cent and it adds calls and SMS plans, 3 to 365 day validity, and wider regional coverage. Saily is the better pick if you want a single reusable eSIM, faster in-app support, and a much higher Trustpilot score (4.7 against 4.1).
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