The cheapest Thailand eSIM here is 1 GB for $1.99 from Travelsim Asia, valid for seven days. Our 3 GB costs $4.99 for 15 days; our 5 GB at $7.89 and 10 GB at $9.99 lead their 30-day tiers. Shorter trips have other winners: Airalo sells 5 GB for $7 over seven days, and Ubigi sells 10 GB for $9 over seven days. Start with the days you need, then compare the price.
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. Ubigi’s $5 / 15 days is next; Saily’s $5.99 lasts 30 days. 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: Travelsim Asia requires no app or account, and Nomad also offers QR installation by email. Compare the plan terms alongside setup preferences. Saily ($10.99), Airalo ($11.00), and Ubigi ($11.00) 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, while our 1–20 GB packs list AIS, DTAC and TrueMove H.
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.
Thailand eSIM plans
Thailand data starts at $1.99, delivered by email with no app or account required. Networks and top-up support depend on the selected plan.
Cost per gigabyte: where the real bargains hide
Larger plans tend to cost less per gigabyte, but only if you can use the allowance before it expires. These selected fixed-data plans are ordered by cost per gigabyte:
Price per GB
| 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 |
Competitor comparison: 2 October 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:
Compare by plan size
| 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 | Ubigi, $5.00 / 15d |
| 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 (30d) | 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 |
Competitor comparison: 2 October 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 1 GB gap to Saily is $1; at 3 GB, our $4.99 is just one cent below Ubigi’s $5 for the same 15-day window.
Unlimited plans, ranked by what a day costs
Travelsim Asia sells fixed-data plans only. Competitor unlimited plans can reduce speed after a daily or total high-speed allowance. The table is ordered by the daily cost of each provider’s shortest listed duration; the lowest total purchase price is a separate question.
Unlimited prices
| 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 |
| Ubigi | $22.00 / 7 days | $3.14 | $49.00 | 30-day plan: 60 GB, then 2 Mbps |
| Airalo | $9.50 / 3 days | $3.17 | $49.00 | 3 GB/day |
| Holafly | $11.90 / 3 days | $3.97 | $73.90 | Not disclosed |
Competitor comparison: 2 October 2026. Always check provider websites before purchasing.
For ten days, the cheapest unlimited Thailand eSIM here is Nomad at $16.00 for 10 days, on sale with a $20.00 list price, so confirm it before you rely on it. Nomad's daily full-speed allowance is 2 GB, the smallest cap in the table. Airalo has the lowest total entry price at $9.50 for three days. Holafly costs $11.90 for three days and $73.90 for 30 days; its exact fair-use threshold is not stated here. Ubigi’s $49 / 30-day plan includes 60 GB at full speed, then 2 Mbps. For the full throttling breakdown, see our unlimited Thailand eSIM guide.
Do the cheap plans run worse networks?
A low price does not by itself mean a worse network. Our 1–20 GB plans list AIS, DTAC and TrueMove H; Nomad lists those brands too, while Airalo and Ubigi list AIS and TrueMove H. Those lists do not prove equal speeds or priority, and they do not establish a network advantage for us.
The two 50 GB packs have different terms. Our ten-day pack uses True Move 4G, starts on installation and cannot be topped up. Our 180-day pack lists TrueMove H and DTAC with 5G access, starts on its first connection in Thailand and supports top-ups.
Four ways a cheap Thailand eSIM turns expensive
- Short-validity choices. Ubigi sells 10 GB for $9 over seven days, while Airalo charges $10 over seven days. Our $9.99 plan lasts 30 days. Ubigi saves 99 cents for a week; our plan gives you more time if the trip is longer.
- 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
Travelsim Asia requires no app or account: the installation instructions arrive by email and the usage portal opens in a browser. Other providers, including Nomad and Ubigi, also offer email QR installation. Check their account and management steps separately. Our top-ups work through the portal except on the 50 GB / ten-day plan, which cannot be topped up.
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. Ubigi’s $5 / 15 days is next; Saily’s $5.99 lasts 30 days.
- 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. Choose on plan terms and setup preferences rather than a one-cent gap.
- 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 180-day one-off option in this comparison.
- Unlimited: Nomad costs $16 / ten days on sale, with a $20 list price. Airalo has the lowest total entry price at $9.50 / three days. Match the duration and high-speed allowance before comparing.
Thailand eSIM plans
Thailand plans start at $1.99. Our 1 GB and 3 GB packs lead those sizes here, and our 5 GB and 10 GB packs lead their 30-day tiers, with no app or account required.
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.