Get on the plane, land, turn on your smartphone, and let your family and friends know right away that you’ve arrived safely. While long lines form at the traditional cell phone booths at the airports in Phuket or Bangkok, savvy travelers to Thailand have long been surfing the stable 5G network.
How does it work? With a travel eSIM. You no longer have to swap out a tiny plastic card—instead, you simply activate your data plan before departure in Germany using a QR code or app.
But which provider is best for your trip to Khao Lak? We put the two heavyweights, Saily and Yesim, through their paces—and the results of our price comparison are clear.
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The Straightforward Price Comparison: Saily vs. Yesim
If you’re looking for unlimited data for your vacation, you’ll see significant differences in the flexible plans. For example, if you want to spend 15 days in paradise, here’s how the costs break down:
- Yesim (15 days unlimited): approx. €31.00
- Saily (15 days unlimited): approx. €43.49
So with Yesim, you’re already saving over €12 just on the base price for one person!
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Flexibility & Terms: Day-by-Day vs. Fixed Packages
Another huge plus for vacation planning is the pricing structure:
- Yesim offers full flexibility: You can book down to the exact day. Whether you stay for 6, 12, or 19 days—you only pay for the exact number of days you need.
- Saily relies on fixed packages: Here, you’re bound by rigid guidelines and can only choose between packages for 5, 7, 10, 15, 20, 25, or 30 days. If you have to extend your stay to 16 days because of your flight, with Saily you’ll end up paying for the more expensive 20-day package.
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The Couples & Families Bonus
Are you traveling to Khao Lak not alone, but as a couple or with your family? Then Yesim really pulls ahead: Starting with the second SIM card you book, you’ll get a whopping 10% discount at Yesim. For couples, this is the perfect deal to take some pressure off your vacation budget right when you land.
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The Contenders in Detail
# 1. Yesim – The Unbeatable Value-for-Money Winner 🏆
Yesim is our top recommendation for Thailand. With its combination of daily billing, unbeatable prices for unlimited data, and additional discounts for groups and couples, the app is the smartest choice financially. Plus, with every purchase, you earn “Ycoins” that you can redeem as a discount on your next trip.
👉 Get your flexible data plan or flat rate from Yesim here
# 2. Saily – The Minimalist Alternative
Saily (from NordVPN) offers an extremely streamlined, uncluttered app and a very simple setup process. However, if you’re looking for unlimited data or flexible contract terms, you’ll pay a significant premium here. Saily is especially worth it if you’re specifically looking for smaller, capped data plans (e.g., 3 GB or 5 GB).
👉 Click here for Saily’s plans
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Our Insider Verdict
For a classic Khao Lak trip for two, Yesim is clearly the frontrunner in 2026. You’ll save money, enjoy maximum flexibility with your travel dates, and take advantage of the partner discount.
Our extra tip: Before purchasing, check your smartphone’s settings to see if your device is eSIM-compatible (this is the case by default for almost all iPhones from the XR/11 generation onward and newer Android devices).
We wish you a fantastic, fully connected time in paradise!
