eSIM.net
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Founded in London in 2019, eSIM.net doesn't present itself as a comparison site the way MobiMatter or eSIMDB do, but its underlying structure is similar: rather than operating one network of its own, it stitches together plans across several real operators, O2, Vodafone, Three, EE, Orange, and Bouygues, and packages them under its own brand. That multi-operator sourcing is what lets it offer both UK-focused and broader European coverage from a single company.
What separates it from a pure comparison tool is that eSIM.net doesn't show you which underlying operator powers a given plan or let you pick between them directly, you're buying eSIM.net's own package, which happens to be built on that multi-carrier foundation. The bigger differentiator worth noting again here is that its plans include actual voice minutes and SMS, not just data, built through those same operator relationships, at pricing from about £6 to £32.50 for travel plans. It suits someone comparing this directory's more traditional data-only marketplaces against an option that also delivers a working phone line.