Gamma Horizon

6.4easy start · #109of 174
in Business Phone Systems

Well documentedyes
Runs where you workyes

Runs on Android, iOS, Web.

Gamma Horizon is ranked #109 of 174 in business phone systems on The Geeks Club, made by Gamma Horizon (Newbury, Berkshire, UK). It runs on Android, iOS, Web.

Gamma Horizon plans and pricing

All plans

Horizon Cloud Phone System Pricing not published; contact sales gammagroup.co · 9 Oct 2026

Compared on business phone systems

Business numbers: multiple
Call routing: custom
Desktop and mobile apps: Yes

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The record

Product: Horizon is a cloud-based, customizable business phone and communications system.
Audience: Gamma says Horizon is used by businesses of all sizes and is trusted by over 60,000 UK companies.
Hybrid work: Users can access fixed and mobile capabilities through a portal and app while working at home or on the move.
Call handling: Features include call routing, call queuing, call recording, and a receptionist console for managing calls and multiple sites.
CRM integrations: Gamma says Horizon is compatible with over 200 CRM packages and names Bullhorn, Salesforce, Zoho, Microsoft Dynamics, and Zendesk among its integrations.
Collaboration: Horizon with Webex combines voice, video meetings, messaging, and file sharing, and Gamma describes AI features including real-time transcription and intelligent call routing.
Analytics: The Horizon with Akixi analytics service offers more than 400 sets of historic and real-time statistics and scales from two to 10,000 users.
Reliability: Gamma describes Horizon as operating across multiple data centres with call switching between centres and backup call routing during site connectivity disruptions.
Uptime: The product page states an SLA of 99.95% for Horizon and separately says Gamma's own network has 99.999% uptime.
Security: Gamma says Horizon uses its next-generation IP network, built-in security for users including remote workers, and managed next-generation firewalls.
Existing phones: Gamma says existing IP-enabled phones can be integrated with Horizon.
Support: Gamma advertises UK-based support teams offering 24/7 first-line support for Horizon; its support page lists a 24/7 support desk.
Accessibility: Listed accessibility features include visual call alerts, adjustable volume, hearing-aid-compatible handsets, TTY support, tactile keys, and auto-answer.
Company: Gamma Communications says it sells exclusively to businesses and public sector organisations, with core markets in the UK and Germany and additional presence in Spain and Benelux.

Where it ranks on The Geeks Club

Best Business Phone Systems in 2026#109 of 174
Best SIP Trunking Providers in 2026#17 of 30

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Sources

gammagroup.co/products/horizon-cloud-phone-system/· checked 9 Oct 2026
gammagroup.co/company/· checked 9 Oct 2026
gammagroup.co/products/sip-trunking-call-management/· checked 28 Sept 2026