Graham Robinson - KeySIM co-founder

IoT SIM cards are revolutionising how machines connect to the internet.

Connected devices only work where there’s signal — and in many areas, only one or two mobile networks provide reliable coverage. KeySIM solves that problem.

Our SIMs connect to any UK network — Vodafone, O2, EE, or Three. 

We go beyond simple connectivity by offering advanced networking features like IPsec tunnelling, private IP address presentation, and our flagship KeySecure service, which lets customers securely connect to a fixed private IP over VPN — a far more secure alternative to public IP access.

For projects that need it, we can also enable public IP links.

With no contracts, no hidden costs, and no surprises, KeySIM offers complete flexibility and control.

Before founding KeySIM, our team deployed over 30,000 SIMs on a separate IoT project — experience that shaped what’s now recognised as the UK’s best IoT SIM card.