Saily vs. Airalo vs. Yesim: Best Thailand eSIM for 2026 Arrivals
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The airport SIM queue at Suvarnabhumi takes between 20 and 45 minutes on a busy morning. You are standing in it with a carry-on, jet lag, and a Grab app that refuses to verify because you have no data. This is an entirely avoidable situation. An eSIM purchased before departure activates the moment your plane touches down, puts you online at the baggage carousel, and costs a fraction of what the airport kiosk charges. The question is which one.
Saily, Airalo, and Yesim are the three providers that consistently appear at the top of every tested comparison for Thailand in 2026. They run on different networks, offer different pricing structures, and perform noticeably differently once you leave Bangkok for the island ferry terminals and national park piers where signal reliability actually gets tested. All prices in this guide are in USD, with Thai baht equivalents using a rate of 35 THB = $1 USD.
Quick Answer: Which One Should You Buy?
Before the full breakdown, here is the short version for travellers who need a decision now:
- Saily: Best for budget-to-mid-range trips of 1 to 4 weeks. Runs on AIS, Thailand’s widest-reach network. Cleanest app. Starts from $2.99 (~105 THB)
- Yesim: Best for heavy users, digital nomads, and island-hopping routes. Dual-network (AIS and TrueMove H) with automatic signal switching. Unlimited plans from $8.21 per day (~287 THB) up to $32.40 for 15 days (~1,134 THB)
- Airalo: Best for multi-country travellers doing Thailand as part of a wider Southeast Asia trip. Runs on AIS and TrueMove H. Regional plans available. Cheapest single-country plan from $4.00 (~140 THB) for 1 GB
None of these three providers includes a Thai phone number or SMS capability. All are data-only. For voice calls, use WhatsApp, LINE, or FaceTime over the data connection.
Understanding Thailand’s Networks First:
Your eSIM provider matters less than the network it runs on. In Thailand, three carriers underpin every travel eSIM sold internationally: AIS, TrueMove H (the merged entity incorporating what was formerly DTAC), and to a lesser extent the legacy DTAC infrastructure still operating under the True Corp umbrella after the 2023 merger.
AIS is Thailand’s largest carrier by tower count and geographic reach. It is the network of choice for remote island coverage: Koh Lipe, Koh Kood, Koh Chang, and the Andaman Sea pier networks where other carriers thin out. If your itinerary goes anywhere genuinely off the main tourist trail, an AIS-backed eSIM is the lower-risk choice.
TrueMove H is the dominant network in Bangkok and major urban centres. It offers fast speeds in cities and strong coverage across the main southern island corridor, including Koh Samui, Koh Phangan, Koh Tao, and the Phuket region. Where AIS extends further into rural and island territory, TrueMove H often delivers faster urban speeds.
Thailand’s overall 4G coverage reaches approximately 97 to 98 percent of the population. 5G is live across Bangkok, Chiang Mai, Phuket, and Pattaya. For most tourist routes, signal is genuinely excellent. The edge cases, the spots where provider choice actually matters, are the smaller, less-visited islands and national park interiors covered below.
Saily: The Best Value for Most Travellers
Saily is built by the team behind NordVPN, which explains why the app feels polished beyond what most eSIM providers deliver. Setup takes around two minutes: download the app, select your plan, scan the QR code, and the eSIM installs directly onto your device. Activation is automatic when you land in Thailand, provided you have enabled the eSIM in your device settings before departure.
All Saily plans for Thailand run on the AIS network, which is the single most important factor for travellers heading to remote islands or national park areas. AIS coverage on Koh Lipe and Koh Kood, two islands where TrueMove H connectivity is unreliable, has been consistently reported as functional where competing providers drop out entirely.
The app includes three built-in features beyond basic connectivity: an ad blocker, a malware site filter, and a data-saving mode that the company claims reduces consumption by up to 28 percent. For a traveller on a capped data plan, that compression is genuinely meaningful.
Saily also offers a full refund if the eSIM fails to activate on your device, valid up to 180 days from purchase. That kind of guarantee from a travel eSIM provider is unusual and worth noting.
Saily Thailand Plan Pricing (2026):
| Plan | Data | Validity | Price (USD) | Price (THB) | Best For |
|---|---|---|---|---|---|
| Entry | 1 GB | 7 days | $2.99 | ~105 THB | Short city stays, maps and messaging only |
| Standard | 3 GB | 30 days | $5.99 | ~210 THB | 2-week trips with moderate daily use |
| Mid | 10 GB | 30 days | $12.99 | ~455 THB | Month-long trips, occasional streaming |
| Heavy | 20 GB | 30 days | $19.99 | ~700 THB | Extended stays, video calls, hotspot use |
| Unlimited | Unlimited | 5 to 30 days | From $18.99 | From ~665 THB | Heavy streaming, remote work, daily hotspot |
Verdict on Saily: The 3 GB / 30-day plan at $5.99 (~210 THB) is the single best value Thailand eSIM plan available for a typical two-week trip in 2026. AIS network backing gives it an edge for island travellers. The NordVPN-derived app is genuinely the most intuitive of the three providers tested here.
Yesim: The Unlimited Choice for Heavy Users
Yesim is the only provider in this comparison that runs on a dual-network configuration in Thailand, automatically switching between AIS and TrueMove H depending on which signal is stronger at your location. For travellers who move frequently between Bangkok and the islands, or who are working remotely from a mix of city cafes and beachside guesthouses, that automatic handoff is a material advantage.
The provider focuses almost entirely on unlimited data plans for Thailand, which makes it structurally different from Saily and Airalo. There is no agonising over gigabyte allocations. You pick a duration, pay the flat rate, and use the data you need. This simplicity appeals to digital nomads, families sharing a hotspot, and anyone who has previously run out of data mid-trip and paid the penalty of buying a top-up at a worse per-gigabyte rate.
Speed tests recorded in Thailand on Yesim have returned download speeds of approximately 80 to 300 Mbps on 5G in urban areas. In practice, real-world speeds at island ferry piers and remote guesthouse locations sit more typically in the 20 to 60 Mbps range on 4G, which comfortably handles video calls, navigation, and streaming. Fair Usage Policy (FUP) throttling may apply after a daily threshold on some unlimited plans, though Yesim has not published a specific cap figure and advises contacting support directly for clarification on current limits.
Yesim Thailand Plan Pricing (2026):
| Plan | Data | Validity | Price (USD) | Price (THB) | Best For |
|---|---|---|---|---|---|
| Day Pass | Unlimited | 1 day | $8.21 | ~287 THB | Layovers, single-day arrivals |
| Weekly | Unlimited | 7 days | $21.20 | ~742 THB | One-week trips, heavy hotspot use |
| Two Weeks | Unlimited | 15 days | $32.40 | ~1,134 THB | Standard holiday, families sharing a hotspot |
| Monthly | Unlimited | 30 days | ~$55 to $65 | ~1,925 to 2,275 THB | Digital nomads, long stays, remote workers |
Verdict on Yesim: The dual-network switching between AIS and TrueMove H makes Yesim the most reliable choice for travellers who move between Bangkok and the islands within a single trip. The unlimited structure removes all data anxiety. The price point is higher than Saily for equivalent durations, but the capacity justifies it for anyone who video calls regularly, runs a hotspot for a laptop, or does not want to think about data consumption at all.
Airalo: The Multi-Country Specialist
Airalo is the world’s largest eSIM marketplace by country coverage, operating in over 200 destinations and offering regional plans that cover multiple countries under a single purchase. This is where it genuinely outperforms Saily and Yesim for a specific type of traveller: anyone doing Thailand as one stop on a Southeast Asia circuit.
A regional Airalo plan covering Thailand, Vietnam, Cambodia, Laos, and Malaysia can be purchased once and runs without the need to buy new eSIMs at each border. For travellers on an overland route from Bangkok through Laos and into Vietnam, this removes a meaningful logistical friction point. The Thailand-only single-country plans on Airalo run on AIS and TrueMove H, with the specific network depending on the plan selected. Check the supported networks field before purchasing.
The Airalo app setup takes 2 to 5 minutes and is straightforward across both iOS and Android. The account system is more developed than Saily’s for frequent travellers, storing multiple eSIM profiles and previous purchases in a single dashboard. For someone who travels to four or five countries per year and wants a single provider relationship rather than managing separate accounts with multiple brands, Airalo makes structural sense.
On Thailand-only performance, Airalo sits broadly level with Saily in urban and main tourist areas. The differentiation between AIS and TrueMove H plans makes it worth spending 60 seconds identifying which network your chosen plan runs on before confirming the purchase.
Airalo Thailand Plan Pricing (2026):
| Plan | Data | Validity | Price (USD) | Price (THB) | Best For |
|---|---|---|---|---|---|
| Starter | 1 GB | 3 days | $4.00 | ~140 THB | Very short stays, maps only |
| Standard | 5 GB | 30 days | ~$13 | ~455 THB | 2 to 3 week trips |
| Heavy | 50 GB | 30 days | $27.50 | ~963 THB | Long stays, heavy use |
| Unlimited | Unlimited (3 GB/day high-speed) | 10 days | ~$31 | ~1,085 THB | Short heavy-use trips |
| Regional Asia | 10 GB | 30 days | ~$32 | ~1,120 THB | Multi-country Southeast Asia route |
Verdict on Airalo: For Thailand only, Airalo is priced slightly above Saily on comparable data volumes and does not match Yesim’s unlimited structure. Its competitive advantage is the regional plan for travellers crossing multiple Southeast Asian borders, and the consolidated multi-trip account management for frequent international travellers.
Head-to-Head Comparison:
| Factor | Saily | Yesim | Airalo |
|---|---|---|---|
| Network(s) | AIS only | AIS and TrueMove H (dual, auto-switch) | AIS and/or TrueMove H (varies by plan) |
| Cheapest plan | $2.99 / 1 GB / 7 days | $8.21 / unlimited / 1 day | $4.00 / 1 GB / 3 days |
| Best value plan | $5.99 / 3 GB / 30 days | $32.40 / unlimited / 15 days | $27.50 / 50 GB / 30 days |
| Island coverage | Excellent (AIS widest reach) | Very good (dual network fallback) | Good (plan-dependent) |
| Hotspot sharing | Yes (most plans) | Yes (all plans) | Yes (most plans) |
| Multi-country plans | Yes (22 multi-country options) | Yes (regional and global tiers) | Yes (strongest selection) |
| App quality | Excellent (NordVPN-grade UX) | Good | Good |
| Refund policy | Full refund up to 180 days if activation fails | Standard support process | Standard support process |
| Built-in security | Ad blocker, malware filter, data saver | None built-in | None built-in |
Island and Remote Coverage: Where It Actually Matters
Major tourist islands including Phuket, Koh Samui, Koh Phangan, Koh Tao, Koh Phi Phi, and Krabi all have strong 4G coverage on both AIS and TrueMove H. The choice of provider makes almost no practical difference at these destinations. The distinction emerges on smaller, less-visited islands and in national park interiors.
Koh Lipe (Satun Province, Andaman Sea): AIS has the strongest coverage here. TrueMove H is usable in the main village but drops in the interior and on some beach stretches. Saily and Yesim both perform well; Airalo plan selection matters here.
Koh Kood (Trat Province, Gulf of Thailand): AIS dominates. Signal on TrueMove H can be intermittent outside the main pier area. Saily’s AIS-only structure is an advantage here specifically.
Koh Chang (Trat Province): Both networks function adequately on the main west coast. The east coast and interior remain patchy on all networks.
Khao Sok National Park and forested inland areas: Coverage is present at park headquarters and main accommodation nodes. Expect signal to thin out substantially on jungle trails regardless of provider.
The practical takeaway: if your Thailand itinerary includes any island beyond the main southern corridor, confirm that your chosen eSIM runs on AIS before purchasing. Saily guarantees this. Yesim’s dual-network fallback is the next best option. With Airalo, check the specific plan’s supported networks field.
How to Set Up Any eSIM Before You Fly:
The process is identical across all three providers. Complete these steps before you leave home, not at the airport or on the plane.
- Step 1: Confirm your phone is eSIM-compatible and unlocked. Most iPhones from XS onwards support eSIM. Android support varies by model: Samsung Galaxy S20 and above, Google Pixel 3 and above, and most flagship devices from 2020 onwards. Dial *#06# and check for an EID number alongside your IMEI to confirm
- Step 2: Purchase your plan through the provider app (Saily, Yesim, or Airalo). You will receive a QR code via email or within the app
- Step 3: Scan the QR code to install the eSIM profile on your device. Go to Settings, then Mobile Data or Cellular, then Add eSIM or Add Mobile Plan
- Step 4: Set the new eSIM as your data line but keep your home SIM active for calls. Enable data roaming on the eSIM line
- Step 5: The eSIM activates automatically when your device connects to a Thai network after landing. No action required at the airport
One critical note: Grab, the dominant ride-hailing app in Thailand, sends an SMS verification code during account setup or when logging in on a new device. This will not arrive if your Thai eSIM is data-only and your home SIM has no roaming. Set up and verify your Grab account while still at home with your home number, before your home SIM loses relevance at the Thai border.
What About NordVPN on Public Wi-Fi?
An eSIM gives you mobile data. It does not protect you on the guesthouse Wi-Fi, the co-working cafe network, or the airport lounge connection you switch to when you want to conserve your data plan.
Thailand has a large and active digital nomad community and a corresponding number of unsecured public networks in cafes, coworking spaces, and hotel lobbies from Chiang Mai to Ko Lanta. Banking on public Wi-Fi without a VPN exposes login credentials and session data to anyone running a packet sniffer on the same network.
NordVPN is the practical pairing with any of the three eSIMs above, covering you on shared networks where your eSIM data is not in use. It also unblocks geo-restricted home banking services and streaming platforms that may restrict access from Thai IP addresses. For anyone working remotely from Thailand on a longer stay, it is a baseline rather than an optional extra.
eSIM vs. Airport Physical SIM: The Real Cost Comparison
The question that comes up every time: why not just buy a SIM at Suvarnabhumi when you land?
You can, and millions of travellers do. The airport AIS and TrueMove H counters sell legitimate, well-priced tourist SIM cards. A 15 GB / 15-day AIS tourist SIM costs around 299 THB (~$8.55) at the official counter. That is genuinely good value if you are comfortable queuing for 20 to 40 minutes after a long flight, swapping out your home SIM (and storing it safely without losing it), and not having data during the queue itself.
The eSIM case is not primarily about price. It is about having Grab, Google Maps, and your hotel confirmation available at the baggage carousel rather than 45 minutes after you land. For families, this gap matters considerably more than for a solo traveller with no onward logistics to coordinate immediately.
The other consideration: if you travel to multiple countries, losing a physical Thai SIM card while swapping to a Vietnamese or Cambodian SIM is a genuine and common occurrence. An eSIM profile stays on your device.
The Final Verdict by Traveller Type:
- Budget traveller on a 1 to 2 week city and beach trip: Saily 3 GB / 30 days at $5.99 (~210 THB). Nothing else at this price point on AIS comes close
- Family sharing a mobile hotspot: Yesim unlimited 15-day plan at $32.40 (~1,134 THB). Unlimited capacity, dual network, no rationing data between family members
- Digital nomad on a 30-day stay: Yesim monthly unlimited. The dual-network switching handles co-working cafes, guesthouse Wi-Fi gaps, and island ferry terminals without the data stress of a capped plan
- Southeast Asia overland traveller: Airalo regional Asia plan. One account, one data plan, no new eSIM to buy at every border
- Remote island itinerary including Koh Lipe or Koh Kood: Saily (guaranteed AIS) or Yesim (AIS fallback via dual network). Avoid Airalo plans that run only on TrueMove H for these specific destinations
Frequently Asked Questions:
Which is the best eSIM for Thailand in 2026?
For most travellers on a 1 to 4 week trip, Saily's 3 GB / 30-day plan at $5.99 (~210 THB) on the AIS network offers the best price-to-reliability ratio. For heavy data users or families sharing a hotspot, Yesim's unlimited 15-day plan at $32.40 (~1,134 THB) on dual AIS and TrueMove H networks is the stronger choice. For multi-country Southeast Asia trips, Airalo's regional plan covers Thailand alongside Vietnam, Cambodia, Laos, and Malaysia from a single purchase.
Does Saily work on Thai islands like Koh Lipe and Koh Kood?
Yes. Saily runs exclusively on the AIS network, which has the widest geographical reach in Thailand and the strongest coverage on remote islands including Koh Lipe, Koh Kood, and the Andaman Sea island chain. AIS is consistently the most reliable network on islands where TrueMove H connectivity thins out.
What network does Yesim use in Thailand?
Yesim operates on a dual-network configuration in Thailand, using both AIS and TrueMove H. The eSIM automatically switches to whichever network carries the stronger signal at your location. This automatic handoff makes Yesim particularly effective for travellers moving between Bangkok and the islands within a single trip.
Is Airalo or Saily cheaper for Thailand?
Saily is cheaper for Thailand-only trips. Saily's 3 GB / 30-day plan costs $5.99 (~210 THB) versus Airalo's comparable options at $13 and above. Airalo becomes more competitive for multi-country travel where its regional Southeast Asia plans offer better overall value than buying separate eSIMs for each country.
Do Thailand eSIMs include a Thai phone number?
No. Saily, Yesim, and Airalo all offer data-only eSIMs for Thailand. None include a local Thai phone number or SMS capability. For calls and messaging, use WhatsApp, LINE, or FaceTime over the data connection. Set up your Grab account and verify it with your home number before departing, as Grab requires SMS verification which will not arrive on a data-only eSIM.
How do I install an eSIM for Thailand before my flight?
Purchase your chosen plan through the Saily, Yesim, or Airalo app, then scan the QR code provided to install the eSIM profile on your device. Go to Settings, then Mobile Data or Cellular, then Add eSIM. Set the eSIM as your data line and enable roaming. The eSIM activates automatically when your device connects to a Thai network after landing. Do this at home, not at the airport.
Is an eSIM better than buying a SIM card at Bangkok airport?
For most travellers, yes. Airport physical SIM queues at Suvarnabhumi take 20 to 40 minutes. An eSIM activates automatically on landing, giving you Grab, Google Maps, and accommodation confirmations at the baggage carousel. A physical tourist SIM from the airport AIS counter costs around 299 THB (~$8.55) for 15 GB, which is competitive on price but requires swapping out your home SIM and queuing after a long flight.
Does Yesim throttle speeds after a certain data limit?
Yesim applies a Fair Usage Policy on unlimited plans which may result in speed reduction after a daily usage threshold. Yesim has not published a specific cap figure publicly. For current FUP limits on Thailand plans, contact Yesim support directly before purchasing if consistent high-speed unlimited data is critical to your use case.
Can I use my Thailand eSIM as a mobile hotspot?
Yes. All three providers support hotspot tethering on most Thailand plans. Saily and Airalo support hotspot on most (but not all) plans, so check the specific plan details before purchasing. Yesim includes hotspot sharing on all unlimited Thailand plans. Hotspot use accelerates data consumption on capped plans, so heavy hotspot users should consider an unlimited plan or a larger data allowance.
Do I need a VPN alongside my Thailand eSIM?
Your eSIM covers mobile data on the Thai network. A VPN like NordVPN is a separate layer for when you connect to public or shared Wi-Fi at cafes, hotels, co-working spaces, or airports. Without a VPN on unsecured networks, login credentials and session data are exposed. NordVPN also unblocks geo-restricted home banking services and streaming platforms that may limit access from Thai IP addresses, which is relevant for digital nomads and longer stays.
