Ringmere is a UK company, Peoplely Ltd, registered in England and Wales, and it sells only into the UK: "Ringmere provides UK phone numbers; international support is on the way." Prices exclude VAT, which it states explicitly rather than leaving you to guess, and a free UK local number is included or you can keep your own.
Its meter is not identical across its own ladder, which is worth knowing before you compare allowances: the entry plan counts call minutes, while the two plans above it count minutes across calls and chat together. Booking and lead capture are on every plan; languages, WhatsApp and multi-staff scheduling need the middle one.