Does eSIM block ads? What ad and tracker blocking actually means
Most eSIMs are plain data connections with no ad-blocking built in. Saily is one of the few providers that includes network-level ad and tracker blocking on every plan by default, filtering requests before they reach your browser or apps.
Use code Sahrzad15 at checkout for a discount.
This is a narrower question than it sounds, and most eSIM comparison articles skip it entirely because most providers don’t offer it at all.
What “ad blocking on an eSIM” actually means
It’s not a browser feature — it happens at the network level, before traffic reaches your phone. Known ad and tracker domains get filtered out as part of how the SIM routes your data, so it works across every app on your phone, not just a browser you’d otherwise need to install an extension on.
Which providers actually offer this
Saily (built by Nord Security, the company behind NordVPN) is the main mainstream eSIM provider with this built in on every plan by default. Airalo, Holafly, Nomad, Ubigi, and Yesim are all plain data resellers with no comparable feature — you’d need a separate app or browser extension to get similar filtering, and that wouldn’t cover other apps on your phone the way network-level blocking does.
Why this matters more while traveling
Public wifi and unfamiliar mobile networks abroad tend to carry more intrusive ad injection and tracking than networks you’re used to at home. Having blocking on by default, without needing to remember to turn on a separate tool, removes one more thing to think about while you’re focused on the actual trip.
What it doesn’t do
It’s not a VPN — your traffic isn’t encrypted or rerouted through another location, it’s just filtered for known ad/tracker domains. If you need actual encryption (for public wifi security, or to access geo-restricted content), you’d still want a separate VPN alongside it.
If this feature matters to you
Saily is the straightforward pick, and the code Sahrzad15 gets a discount at checkout. If you don’t care about the ad-blocking specifically, providers like Airalo or Nomad are worth comparing on pure price and coverage instead — see the full eSIM comparison for that angle.
Setting up for a longer trip? See eSIM for long-term travel for plans built around multi-month stays.
Frequently asked questions
Do all eSIMs block ads?
No. Most eSIM providers, including Airalo, Holafly, and Nomad, sell plain data connections with no ad-blocking or privacy features. Saily is one of the few that includes network-level ad and tracker blocking by default.
How does network-level ad blocking work on an eSIM?
Instead of a browser extension filtering content after it loads, network-level blocking filters known ad and tracker domains before the request reaches your device at all — it works across every app, not just your browser.
Does ad blocking on an eSIM replace a VPN?
No. Ad and tracker blocking filters specific known domains; a VPN encrypts and reroutes your entire connection. They solve different problems, and Saily's ad blocking doesn't include VPN-level encryption.
Will blocking ads on my eSIM slow down my connection?
No, if anything it can make browsing feel faster, since fewer ad and tracker scripts are loading in the background. There's no meaningful speed penalty from the blocking itself.