One in five properties in Hereford, Stokesley, Great Ayton and Thirsk have adopted full fibre services from Zzoomm.
YouFibre has connected its 100,000th customer, doubling its base in the last nine months.
The altnet’s network now passes nearly one million properties in almost 100 towns. It secured a further £147.5m in March.
MD Ryan Battle, said: “We know it is hard for customers to let go of their existing broadband provide and potentially put their whole online life in jeopardy for the new kid on the block.”