Every major UK carrier and specialist reseller, their coverage, strengths and watchouts. No paid rankings — we compare them all.
There are ~25 UK carriers and 100+ resellers. These are the ones that quote most often on SME leased lines in 2026.
For SMEs, the top choices are BT Business (widest coverage), Virgin Media Business (best urban pricing), Cityfibre resellers like Zen (cheapest symmetric fibre in covered cities), and specialists like Gamma or Vorboss for hands-on service. The 'best' provider depends entirely on your postcode — not every carrier serves every address.
No. Openreach owns roughly 60% of UK leased line fibre, but Virgin Media Business, Cityfibre, Colt, Neos Networks and Vorboss operate their own physical fibre in many postcodes. That's why quotes vary — different underlying networks with different cost structures.
Going direct means one quote at BT's list price. Using a comparison service means 3–5 carrier quotes at their competitive pricing. On the same 200 Mbps circuit, we routinely see £200+/month difference between BT direct and the same BT quote through a channel partner.
A carrier owns the fibre (BT/Openreach, Virgin, Cityfibre, Colt). A reseller buys wholesale from a carrier and packages it — Zen, TalkTalk Business, Gamma. Resellers are often cheaper because they run leaner ops, and they can quote across multiple carrier networks in one place.
Free coverage check + 3+ quotes within 24 hours.
Compared against 20+ UK providers · Independent · No sales spam
