Last updated: August 17th, 2026
Travelsim Asia sells the cheapest Thailand eSIM at four of the six standard data sizes in 2026: 1 GB for $1.99, 3 GB for $4.99, 5 GB for $7.89, and 10 GB / 30 days for $9.99. Airalo takes the 20 GB tier at $18.00, and Nomad takes the 50 GB / 10-day tier at $12.00. This page ranks every major provider's Thailand plans three ways: by trip length, by cost per gigabyte, and by data size, so you can find the lowest total cost for your exact trip.
One thing before the numbers: we sell eSIMs, so we have a horse in this race. Every table below includes competitor prices anyway, and where a rival is cheaper, the winning cell is theirs, in bold. That covers Airalo at 20 GB and Nomad at 50 GB, among others.
Match the plan to your trip length first
The cheapest Thailand eSIM is the smallest plan that covers both your days and your gigabytes. A bargain that expires halfway through your trip forces a second purchase and costs more than the "expensive" plan would have.
A few days in Bangkok
For a layover or a long weekend, 1 GB covers maps, Grab, and messaging comfortably. Travelsim Asia's 1 GB / 7-day plan at $1.99 is a full dollar under Saily's $2.99, and both carry the same 7-day window. Airalo charges $4.00 for 1 GB with only 3 days of validity: double the price for less than half the window.
One week
Light users get through a Thai week on 3 GB, and Travelsim Asia's $4.99 / 15-day plan is the cheapest 3 GB in the market. Saily's $5.99 / 30 days is next. If you lean on data harder, the 5 GB / 30-day tier is tight at the top: Travelsim Asia at $7.89, Saily at $7.99, Airalo at $8.00. One honest footnote: Airalo also sells 5 GB for $7.00 on a 7-day window, which saves 89 cents if your trip is exactly a week and you accept the shorter clock.
Two weeks
Heavier two-week trips land at 10 GB, and this tier is decided by a single cent: Travelsim Asia at $9.99 / 30 days, Nomad at $10.00 / 30 days. That is not a meaningful gap, so it helps that the two plans differ elsewhere: Nomad needs its app and an account, while the $9.99 plan arrives by email and installs in a browser. Saily ($10.99), Airalo ($11.00), and Ubigi ($12.00) fill out the tier.
A month or longer
At 20 GB, Airalo wins. Its $18.00 / 30-day plan undercuts Travelsim Asia and Saily, tied at $19.99, by two dollars, and its $17.50 / 15-day version is the cheapest 20 GB of any duration. If your month needs 20 GB and price is the only criterion, buy Airalo. The $19.99 plan earns its keep on the no-app purchase and web top-ups, not on the sticker.
Ten data-heavy days
Streaming, hotspotting, or working remotely between islands? Nomad's 50 GB / 10 days at $12.00 is the cheapest big-data plan in Thailand. Travelsim Asia's 50 GB / 10 days at $15.99 is the runner-up, and Airalo's $27.50 is the only 50 GB with a 30-day window. Note the network trade-off on ours: the 50 GB / 10-day pack runs on the True Move network only, not the usual AIS + dtac pairing.
Multi-month stays
For slow travelers, retirees wintering in Chiang Mai, and repeat visitors, Travelsim Asia's 50 GB / 180 days at $54.99 stands alone: no other provider in this comparison sells a Thailand plan with multi-month validity. One purchase, six months of coverage, $1.10 per gigabyte, on True Corp networks only. There is no second-cheapest option to compare it against.
Cost per gigabyte: where the real bargains hide
Sticker prices reward small plans; per-GB math rewards big ones. Ranked by cost per gigabyte, the Thailand market looks like this:
| Plan | Provider | Price | Per GB | Validity |
|---|---|---|---|---|
| 50 GB | Nomad | $12.00 | $0.24/GB | 10 days |
| 50 GB | Travelsim Asia | $15.99 | $0.32/GB | 10 days |
| 50 GB | Airalo | $27.50 | $0.55/GB | 30 days |
| 20 GB | Airalo | $18.00 | $0.90/GB | 30 days |
| 10 GB | Travelsim Asia | $9.99 | $1.00/GB | 30 days |
| 20 GB | Travelsim Asia | $19.99 | $1.00/GB | 30 days |
| 25 GB | Ubigi | $24.90 | $1.00/GB | 30 days |
| 50 GB | Travelsim Asia | $54.99 | $1.10/GB | 180 days |
| 5 GB | Travelsim Asia | $7.89 | $1.58/GB | 30 days |
Prices verified August 2026. Always check provider websites before purchasing. Travelsim Asia is our own product.
Two takeaways. The per-GB floor sits at the 50 GB / 10-day tier: Nomad's $12.00 plan works out to $0.24 per gigabyte, the lowest rate of any Thailand plan, with Travelsim Asia's $15.99 pack next at $0.32. And at the sizes most travelers actually buy, $1.00 per gigabyte is the line to beat; Travelsim Asia's 10 GB plan hits it at the lowest sticker price ($9.99) of the three plans that manage it over 30 days.
Cheapest at every plan size, with the runner-up
If you already know how many gigabytes you need, this is the whole market in one table:
| Data | Cheapest | Price | Validity | Runner-up |
|---|---|---|---|---|
| 1 GB | Travelsim Asia | $1.99 | 7 days | Saily, $2.99 / 7d |
| 3 GB | Travelsim Asia | $4.99 | 15 days | Saily, $5.99 / 30d |
| 5 GB (30d) | Travelsim Asia | $7.89 | 30 days | Saily, $7.99 / 30d |
| 10 GB (30d) | Travelsim Asia | $9.99 | 30 days | Nomad, $10.00 / 30d |
| 20 GB | Airalo | $18.00 | 30 days | Travelsim Asia & Saily, $19.99 / 30d |
| 50 GB (10d) | Nomad | $12.00 | 10 days | Travelsim Asia, $15.99 / 10d |
| 50 GB (180d) | Travelsim Asia | $54.99 | 180 days | None sold |
Prices verified August 2026. Always check provider websites before purchasing. Travelsim Asia is our own product. "d" = days of validity.
Read the 20 GB row plainly: Airalo is cheapest there at $18.00, two dollars under the $19.99 tie between Travelsim Asia and Saily, and its 15-day version costs even less at $17.50. Read the 10 GB row just as plainly: the win is one cent. The small tiers are where the gaps get wide, a full dollar at both 1 GB and 3 GB.
Unlimited plans, ranked by what a day costs
Travelsim Asia sells fixed-data plans only, at full speed with no throttling, so this section is entirely about competitors. "Unlimited" in Thailand means unlimited volume with a daily full-speed allowance, after which speeds drop hard. Ranked by per-day cost:
| Provider | Cheapest unlimited | Per day | 30-day plan | Full-speed cap |
|---|---|---|---|---|
| Nomad | $16.00 / 10 days (sale, list $20.00) | $1.60 | $33.00 | 2 GB/day |
| Saily | $14.99 / 5 days | $3.00 | $48.99 | 5 GB/day, then ~1 Mbps |
| Airalo | $9.50 / 3 days | $3.17 | $49.00 | 3 GB/day |
| Ubigi | $22.00 / 7 days | $3.14 | $55.00 | None, genuinely uncapped |
| Holafly | $20.50 / 5 days | $4.10 | $73.90 | Not disclosed |
Prices verified August 2026. Always check provider websites before purchasing.
The cheapest unlimited Thailand eSIM is Nomad at $16.00 for 10 days, a sale price down from a $20.00 list, so confirm it before you rely on it. Nomad's daily full-speed allowance is 2 GB, the smallest cap in the table. Holafly is the most expensive way to buy Thailand data at every duration it sells, from $4.10 per day on 5 days to $73.90 for a month, and it is the only provider here that keeps its fair-use threshold to itself. Ubigi charges a premium ($55.00 for 30 days) for the one genuinely uncapped plan. For the full throttling breakdown, see our unlimited Thailand eSIM guide.
Do the cheap plans run worse networks?
In Thailand, no. The price gaps in this comparison come from business models, not network quality. Travelsim Asia's AIS + dtac pairing takes a network from each of Thailand's two big mobile groups; Nomad runs the same pair. Airalo and Ubigi pair AIS with TrueMove H, Holafly runs TrueMove H and dtac, and Saily is the only provider that won't name its Thai network at all.
One exception on our side, stated plainly: both Travelsim Asia 50 GB packs sit outside the AIS + dtac pairing. The 10-day pack runs on the True Move network only, and the 180-day pack runs on True Corp networks only. Everything from 1 GB to 20 GB uses AIS + dtac.
Four ways a cheap Thailand eSIM turns expensive
- Short-validity look-alikes. Airalo and Ubigi both sell 10 GB for $10.00 on 7-day windows, one cent above Travelsim Asia's $9.99 with 30 days. The same gigabytes, 23 fewer days to use them. Check the validity column before the price column.
- The 3-day small plan. Airalo's 1 GB costs $4.00 and expires in 3 days. Anyone staying four days or more either buys again or buys bigger, which makes the $1.99 / 7-day alternative the cheaper plan twice over.
- Unlimited per-day math. A Holafly week costs $27.50, roughly $3.93 per day, before you know what its fair-use policy does to your speed. A 10 GB fixed plan covers the same week at full speed for $9.99. Unless you hotspot a laptop daily, fixed data wins in Thailand.
- Sale prices doing the ranking. Nomad's $16.00 unlimited and its $12.00 / 50 GB are aggressive prices, and the unlimited one is explicitly a sale (list $20.00). If a table like ours is a week old, the sale may not be. Verify before buying around a discount.
The cheapest option that skips the app
Every other provider in this comparison requires its app, an account, or both before the eSIM activates, which is an awkward requirement when you land at Suvarnabhumi without data. Travelsim Asia is the only provider in this comparison that requires no app and no account: the QR code arrives by email, installs from any browser, and tops up through a web portal. Combined with the price table above, that makes the $1.99, $4.99, and $9.99 plans the cheapest Thailand data you can buy without installing anything first.
Verdict: the cheapest Thailand eSIM at every size
- 1 GB: Travelsim Asia, $1.99 / 7 days. A dollar under Saily's $2.99, half of Airalo's $4.00.
- 3 GB: Travelsim Asia, $4.99 / 15 days. Saily's $5.99 / 30 days is next.
- 5 GB / 30 days: Travelsim Asia, $7.89. Ten cents under Saily, eleven under Airalo.
- 10 GB / 30 days: Travelsim Asia, $9.99, exactly one cent under Nomad's $10.00. The tiebreaker is delivery: email and browser versus app and account.
- 20 GB: Airalo, $18.00 / 30 days, or $17.50 on 15 days. Travelsim Asia and Saily tie for second at $19.99.
- 50 GB / 10 days: Nomad, $12.00, the market's per-GB floor at $0.24/GB. Travelsim Asia's $15.99 ($0.32/GB) is second; Airalo's $27.50 is the only 50 GB with a 30-day window.
- Multi-month: Travelsim Asia, 50 GB / 180 days, $54.99. The only multi-month Thailand plan sold by any provider in this comparison.
- Unlimited: Nomad, $16.00 / 10 days on sale. Holafly is the most expensive way to buy Thailand data at every duration.
Dig deeper
The rest of our Thailand eSIM coverage, if price was only part of your question:
- Thailand eSIM Prices 2026, the full provider-by-provider breakdown including every plan and unlimited tier.
- Best eSIM for Thailand (2026), the full buyer's guide weighing coverage, throttling, and setup alongside price.
- Best eSIM for Thailand: 1 Month Stay, plan picks matched to 30-day usage patterns.
- Are Unlimited Thailand eSIMs a Scam?, what fair-use policies actually do to "unlimited" speeds, provider by provider.
- How Much Data Do You Need in Thailand?, daily usage math by traveler type so you buy the right size.
- How to Install a Thailand eSIM, step-by-step setup for iPhone and Android, including airport activation.
- Thailand eSIM vs Airalo 2026, the head-to-head with the market's biggest name, including the 20 GB tier Airalo wins.
Not sure which plan fits your trip? Our support team is available 24/7 via email and live chat, with typical response times under one hour.