About eSIM Guide

We've all been there—standing in an airport after a long flight, trying to figure out the best way to get online without facing a huge bill back home. The world of travel connectivity can feel unnecessarily complicated, filled with confusing terms and hidden fees.

That is why eSIM Guide exists. It is built and run by Tom Sharkey, a software developer and frequent traveller based in the UK. There is no large editorial team behind this site and no anonymous "experts": one person writes the code that collects the data, decides how it is presented, and answers the emails when something is wrong. If a price on this site is out of date, there is a name attached to that.

The site started as a personal problem. Comparing eSIM plans properly means normalising dozens of provider catalogues that quote different currencies, different allowances and different validity periods, and then working out which is actually cheapest per gigabyte. That is tedious to do by hand and trivial to do with software, so the software got written.

Our Mission: Connectivity, Simplified

Our mission is to be your trusted co-pilot for navigating the world of eSIMs. We do the heavy lifting for you, meticulously researching and organizing plans from a wide range of trusted providers. We cut through the noise and present the information in a clean, straightforward way. Our easy-to-use platform allows you to effortlessly compare plans side-by-side. You can filter by what matters most to you:

Whether you are a digital nomad hopping between countries, a family heading off for a fortnight, or a business traveller who simply needs reliable access, the goal is to help you find the right plan in a few clicks.

Where our data actually comes from

This is the part that separates a useful comparison site from a page of copied listings. Every plan on eSIM Guide is pulled directly from the provider's own API, not scraped from another comparison site and not typed in by hand.

We maintain a separate integration for each provider — more than twenty of them at the time of writing — and each one runs through the same shared synchronisation code, so every provider is treated identically. A scheduled job works through them continuously, refreshing whichever provider has gone longest without an update, so each catalogue is re-read around once a day. New plans appear, changed prices are updated, and plans a provider has withdrawn are removed rather than left to rot.

Between them, those providers cover plans for more than 230 countries and territories. For each plan we hold the provider's own price and currency, the data allowance, the validity period, the countries covered, and — where the provider publishes it — the fair usage policy, speed limits, tethering rules and whether ID verification is required at checkout. Prices are converted for display using European Central Bank reference rates, and every plan is reduced to a comparable price per gigabyte so that a 3 GB seven-day plan can be judged honestly against a 20 GB monthly one.

None of that makes us infallible. Providers change their catalogues without warning and feeds occasionally break, which is why we record the outcome of every sync and why we tell you to confirm the final price at the provider's checkout. If you want the full detail — including the parts we decide by hand rather than by formula — it is all set out in our ranking methodology.