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Business Service Company

Zest4

Wholesale mobile, cloud telephony and unified communications supplier for UK reseller businesses

About Zest4

Zest4 is a UK wholesale telecoms provider that sells only through resellers. It supplies mobile, IoT, cloud telephony and unified communications services, so partners can resell them under their own brand. The company states that customer ownership always stays with the partner.

What Zest4 offers

  • Mobile — wholesale mobile connections for resale.
  • Unified communications — business phone and collaboration services.
  • Cloud telephony — hosted voice platforms, including CallSwitch.
  • IoT — connected-device services, with the Zest4Tag tracker added recently.
  • Partner support — portals, an API and a support desk dedicated to resellers.

Who it works with

Zest4 serves fixed-line resellers, IT resellers and mobile resellers across the UK. It works with network and platform providers including O2, Vodafone and Gamma, and is an O2 wholesale partner.

Key facts

  • Based in: United Kingdom
  • Experience: more than two decades in telecoms, as stated
  • Partnerships: O2 Joined-Up Communications Wholesale Partner

Profile written by TrustList from the business's own published information, Oct 2026.

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What the business tells TrustList

Founded
2006 (20 years) evidence sent

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