Best eSIM provider for Turkey in 2026?

Is unlimited data actually worth it, or is 5–10 GB enough for a 2–3 week trip?

All depends on your habits. My wife and I went to Ireland for 2-3 weeks, I used well under 5 gb, she used a bit over 5 gb. Depends mainly on if you watch videos or not. Just do not allow your phone to automatically send all your photos to "the cloud" (looking at you, Apple).

Did anyone try using one eSIM across multiple countries (EU + Turkey)?

I use Roamless and Bcengi esims. They are very cheap, and each work in over 200 countries. You give them $10 which never expires, then you are charged only for the amount of data used. For Turkey it's $3.95/Gb for Roamless, and $1.12/Gb. for Bcengi. For the EU, most countries are cheaper than $3.95. They work great in multiple countries, just connect automatically. I actually use both of them here in the U.S. if my "normal" cell plan has poor coverage somewhere.

I've been using Bcengi here at home (where I have a high per-GB charge on my regular plan). I think I'm paying about $1.60/GB to Becengi, but there are some individual countries with markedly high rates, so it's important to check. In the past I used Airalo in Europe, and I think that ran around $3/GB. Because the typical eSIM is time-limited (and often country-specific), I always had unused data at the end of my trips, so the actual per-GB cost was higher. Since Bcengi can be used almost everywhere, the traveler won't be leaving a trail of usused data as (s)he crosses borders. I intend to keep using Bcengi when I head to Europe in a couple of months, but I cannot yet vouch for how well it will work there.

The mapping program I use requires basically constant internet connectivity, so my usage rate is probably about 3 GB per week even though I don't stream videos or upload photos. I think most travelers who are careful to do data-intensive things via Wi-Fi from their hotel rooms would use less data than I do. I know with Airalo, and I assume with other eSIM providers, it is very easy to top up your data if you see you are running low. You don't need to download a new eSIM (unless you've changed countries) or go through the set-up procedure again; you just open the app and pay for the extra time/data you anticipate needing. The cost of a short-term add-on is likely to be a bit higher per GB than what you'd have paid if you estimated more accurately in the beginning, but who can do that? Not I.

I will say that I occasionally have had an issue getting an eSIM to work immediately after I enter a new country. Most often it was user error (you need to be sure you follow all the activation steps, which can vary from country to country). Other times, rebooting my phone solved the problem.

I was in Turkey earlier this year (Istanbul + Cappadocia) and had the same question before the trip. I looked at Airalo, Holafly and a couple others because there are so many options now.

In the end I tried Skyalo mainly because the price for the data package looked decent and it covered both Turkey and Europe, which I needed for the rest of my trip.

It actually worked pretty well. In Istanbul the connection was fast and stable for maps, ride apps and messaging. Cappadocia was the only place I was slightly worried about, but I still had 4G most of the time around Göreme and while moving between towns.

I took a 10GB plan for about two weeks and that ended up being more than enough for normal travel use.

I can’t really compare directly with Airalo in Turkey since I didn’t test both there, but Skyalo worked without issues for me. Curious what others here ended up using.

I used Airalo in Turkey and was very satisfied. You can always top up data. If you are unsure you need unlimited, start smaller and see how it goes.

Regarding map apps, they vary a lot. I use Organic Maps, which I learned about on this forum. I download the maps for the country or part of the country, at home, or in the hotel via wifi. But Organic Maps might not do all you want it to do. No realtime traffic, for instance, and it won't give me a train route. I believe one can download maps in advance on G**gle Maps. Does that work well?

For train/bus/walking routing, I use the official Swiss and German rail apps. They give the best routing information, but they will require realtime data. But probably not as much as downloading whole maps.

I’ve cycled through quite a few eSIMs over the last couple of years (Airalo, YeSIM, Orange Flex, etc.), and honestly, there’s no single 'perfect' provider—it usually depends on the specific country.
For Turkey, Airalo is the classic choice, but I’ve found their speeds in Cappadocia can be a bit inconsistent lately. If you have Orange Flex (like I do for EU roaming), definitely check their Turkey add-ons first, though they are usually quite expensive since it's outside the standard EU zone.
On my last trip in September, I actually tested Skyalo alongside YeSIM. YeSIM was decent in Istanbul, but Skyalo seemed to have a more stable connection once I got out into the valleys in Goreme. I just grabbed their 10GB plan and it was enough for about 10 days of maps and social media.
If you’re a data-heavy user and don’t mind paying more, Holafly is an option for unlimited data, but keep in mind you often can't use your phone as a hotspot with them. For most people, a simple 5GB or 10GB pack from Skyalo or Airalo is probably the most practical way to go. Just compare the prices on the day you travel!

I used Airalo in Istanbul and elsewhere in the Caucasus last year and everything worked fine.

Is unlimited data actually worth it, or is 5–10 GB enough for a 2–3 week trip?

I always buy the T-Mobile international plan that gives you 15GB of high-speed data and I always run out after about 18 days.