# Yesim vs Saily: which eSIM for Slovakia Source: https://taply.sk/yesim-vs-saily/ (Taply, updated 2026-10-15) Choose Saily for a simple data eSIM on a short Slovakia trip, and choose Yesim if you also want a virtual phone number or a built-in VPN in the same app. Both sell prepaid data eSIMs for Slovakia and for Europe that you install before you fly. Neither gives you a Slovak phone number by default, since most plans are data only. Yesim was founded in 2019 and is run by Genesis Group AG in Baar, Switzerland. Saily comes from Nord Security, the company behind NordVPN. The right choice depends on whether the extras matter to you, and on the plan and price shown for your dates. Some links are affiliate links. Taply may earn a commission at no extra cost to you. Taply has not used either service and bases this page on public information. ## Key points - Both sell Slovakia and Europe data eSIMs delivered through an app or QR code. - Yesim adds virtual numbers and a VPN; Saily keeps the product focused on data. - Yesim states a 30 day refund request window for unused plans; Saily's refund applies to eSIMs not yet installed, so check its terms. - Compare live prices for the same data size and validity. ## Quick facts - Yesim: eSIM plus virtual numbers and VPN - Saily: Data eSIM from Nord Security - Yesim refund: 30 days if unused - Verdict: Saily simple data, Yesim extras ## Yesim vs Saily and alternatives for Slovakia, ranked 1. **Saily** (best for Short city trips): Saily is a data eSIM app from Nord Security with single-country and regional plans, including unlimited plans with fair-use limits. It suits a short trip where you only need mobile data. 2. **Yesim** (best for Data plus a number): Yesim sells eSIM data plans plus optional virtual numbers and a VPN. It suits travellers who want a number for verification codes or who like pay-as-you-go style options. 3. **Airalo** (best for Comparing bundles): A large eSIM marketplace with Slovakia and Europe plans, useful as a third price check. 4. **Drimsim** (best for Minimal data): A pay-as-you-go SIM or eSIM that charges per megabyte, suited to very light data use. 5. **Slovak prepaid SIM** (best for Month-long stays): A local SIM from a Slovak network gives a local number and is often cheaper per gigabyte on stays of a month or more. ## Side by side Feature | Yesim | Saily | How it works | Pick a plan in the app, install by QR code or in-app, switch the eSIM line on | Pick a plan in the app, install by QR code or in-app, switch the eSIM line on | Pricing model | Data bundles with validity, top-ups, optional virtual numbers | Fixed data bundles with validity, plus unlimited plans with fair use | Phone number | Virtual number available as a paid add-on in selected countries | Data only, calls and texts come from your home SIM or apps | VPN | Offered | Check the app; Nord Security is a VPN company | Refund as stated | 30 day request window for unused, unactivated plans and top-ups | Reported for eSIMs not installed or activated; check the current window | Support | In-app support; check hours | In-app support; check hours | Best for | Travellers who want a number and extras | Short trips with data only | Details reflect public descriptions and change over time, so confirm them on the provider's site before buying. ## Choose Yesim if, choose Saily if Choose Yesim if - you need to receive verification codes or calls on a number from another country - you like having a VPN in the same app - you want the option to top up rather than buy a new bundle - you value a stated 30 day request window for unused plans Choose Saily if - you only need data for maps, messaging and a few videos - you want a straightforward app from a known security brand - you prefer fewer choices on screen - your trip is a weekend or a week in Bratislava or the High Tatras ## Coverage and speed in Slovakia Both brands resell data from partner mobile networks, so Slovak coverage and speed depend on the network named on the plan page. Bratislava and Košice are well covered in general. Mountain areas such as the [High Tatras](https://taply.sk/high-tatras/) can have weaker signal in valleys and on trails, whichever provider you use. For the single-country case see [eSIM for Slovakia](https://taply.sk/esim-slovakia/), and for multi-country trips see [best eSIM for Europe](https://taply.sk/best-esim-for-europe/). If you plan to hop between Vienna, Bratislava and Budapest, a regional Europe plan from either brand can save swapping profiles. Check which countries each regional plan includes before you pay. ## How to buy and set up, step by step - Check that your phone supports eSIM and is not locked to your home carrier. - Compare a Slovakia plan and a Europe plan on both apps for the same data size and number of days. - Check the refund wording on the plan page. - Pay, then install the eSIM on Wi-Fi before you travel, via the app or QR code. - On arrival, turn on the eSIM line, enable data roaming for it and switch mobile data off on your home SIM. - Keep the profile on the phone until the plan expires. ## Common mistakes - Installing on arrival without internet to download the profile. - Buying for a phone that does not support eSIM. - Forgetting data roaming on the eSIM line. - Deleting the eSIM too early, since it usually cannot be reinstalled. - Buying a number add-on without reading its renewal terms. - Expecting a Slovak number from a data-only plan. For a local number, read [Slovak prepaid SIM cards](https://taply.sk/slovakia-prepaid-sim-card/). More on each provider in the [Yesim review](https://taply.sk/yesim-review/) and [Saily review](https://taply.sk/saily-review/). ## Who should skip both If you will stay a month or more, or need a Slovak number for banking codes and deliveries, a local prepaid SIM is usually the better value. If your home carrier includes EU roaming, you may not need an eSIM at all, so check your plan first. Visitors from outside the EU, for example from the United States or the United Kingdom, usually do need a local solution, see [eSIM for US travellers in Slovakia](https://taply.sk/esim-for-us-travelers-slovakia/). ## Wi-Fi and data needs Slovakia has widespread Wi-Fi in hotels, cafes and many public places, which lowers the data you need. Maps, ride apps, translation and photo backup are the heavy users. Estimate your daily use, then pick a plan size with some margin. See [internet and Wi-Fi in Slovakia](https://taply.sk/internet-and-wifi-in-slovakia/) for what to expect in cities and mountains. ## Quick decision guide - Weekend in Bratislava, data only: Saily. - Need a number for verification codes: Yesim. - Moving between Vienna, Bratislava and Budapest: compare the Europe plans of both. - Month-long stay: a Slovak prepaid SIM. Both apps let you browse plans before paying, so compare the same data size and duration and then check the refund wording. ## Seasonal and trip-type notes Usage differs by trip. A summer city break in Bratislava with Wi-Fi in the hotel needs little data. A hiking week in the Tatras uses more for maps, weather checks and photos, and signal in valleys can drop. A winter ski trip, see skiing in Slovakia, often means lift apps and live webcams. Buy a size that covers your heaviest days, because topping up mid-trip on a plan that does not allow it can be awkward. ## Verdict For plain data on a short Slovakia trip, Saily is the easier pick. For a trip where a virtual number or VPN matters, Yesim is the more flexible option. Since both resell local networks and prices move often, compare the same plan on both apps right before you buy. If you want a wider catalogue, see Airalo vs Yesim and Airalo vs Saily. ## FAQ **Does Yesim or Saily give me a Slovak phone number?** Not by default. Most plans are data only. Yesim sells virtual numbers as a separate add-on in selected countries, which are not necessarily Slovak numbers. **Which has the better refund policy?** Yesim states a 30 day request window for unused, unactivated plans. Saily's refund is reported for eSIMs that have not been installed or activated. Check both current terms. **Do they work in the High Tatras?** Both rely on partner networks, so signal is the same as for any SIM on that network, and mountain valleys can be patchy. **Can I use the eSIM for a hotspot?** Tethering rules differ by plan. Check the plan page for hotspot permission before buying. **Should I buy before I fly?** Yes. Install on Wi-Fi at home or at the airport so data is ready when you land. **Is a local SIM cheaper?** For stays of a month or more, a Slovak prepaid SIM is often cheaper per gigabyte, but it needs a shop visit.