Top 10 eSIM providers for London in 2026

The full list

1. 1

   Airalo

   Strong EE coverage from the Piccadilly line platforms at Heathrow right into central London. Flexible 1-20 GB packages with clear pricing and no auto-renewal traps. QR activation takes under two minutes: scan it at your departure gate and you're connected before the seatbelt sign goes off.

   Visit Airalo
2. 2

   Holafly

   Unlimited data on Three's network is the draw: navigate, stream, and hotspot without watching your balance. Coverage holds well across Zone 1 and into South London suburbs like Brixton and Dulwich. The app is clean and activation is instant, though the unlimited branding hides a fair-use throttle past roughly 30 GB daily.

3. 3

   Saily

   NordVPN's eSIM arm pairs competitive per-GB rates with a privacy-first stance that appeals to remote workers camped in Shoreditch co-working spaces. Routes through EE with solid signal along the Elizabeth line corridor. No hidden fees in testing, though plan flexibility is narrower than Airalo's range.

4. 4

   Nomad eSIM

   Reliable Vodafone-backed coverage that tends to hold signal better in some of the older Tube tunnels south of the Thames. Decent mid-range pricing and a clean app. Data sharing across devices works well if you're splitting time between phone and tablet while wandering through Southwark and Bermondsey.

5. 5

   Truphone

   London-headquartered and one of the few eSIM providers offering voice and SMS alongside data: handy for calling restaurants in Mayfair or confirming your hotel near King's Cross by phone. Coverage is solid but per-GB pricing runs 15-20% above Airalo for equivalent packages.

6. 6

   Maya Mobile

   Budget-friendly option routing through Three's network. Coverage around Westminster and the West End holds up well, though users report occasional slowdowns during peak hours near major stations like Victoria. Good for shorter trips where 3-5 GB is more than enough to get around.

7. 7

   Ubigi

   Partners with EE for UK coverage, which means decent signal in the newer Tube coverage zones around the Jubilee line extension through Stratford. Pricing sits mid-tier (not the cheapest) but the activation process through their app is notably smooth for first-time eSIM users arriving at City Airport.

8. 8

   GigSky

   Premium pricing but dependable coverage across London, including decent signal in the DLR corridors through Docklands and out to Greenwich. The per-GB cost is hard to justify for casual tourists, but road warriors who need guaranteed connectivity from Gatwick to the City appreciate the network redundancy.

9. 9

   aloSIM

   The budget pick: per-GB costs undercut most competitors by 20-30%. Coverage piggybacks on Three's infrastructure and works fine above ground from Camden to Brixton, though underground performance is inconsistent. Best for travellers who lean on Wi-Fi and only need data for maps and messaging.

10. 10

    Yesim

    Reasonable pricing and adequate Vodafone-backed coverage for general London use. The app interface feels dated compared to Airalo or Holafly, and a few user reports mention unexpected charges when data caps are hit near renewal. Fine for a weekend trip to the West End, less ideal for longer stays.

    Visit Yesim