No. 115of 174 ·Business Phone Systems

Gamma Horizon

Web · Android · iPhone

Freedom report

Two barsScore 5.4

Runs widely3 of 6 device platforms
DocumentedPlans, terms and facts published

Gamma Horizon is ranked #115 of 174 in business phone systems on Freedom251, 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

Best Gamma Horizon alternatives

See all 20

Two bars Microsoft Teams Free tier No. 1$0.33/mo8.3 Two bars 3CX Free tier No. 2$25/mo8.2 Two bars Zadarma Free tier No. 3$44/mo7.7 Two bars VitalPBX Free tier No. 4$100/mo7.7 One bar PortSIP PBX Free tier No. 5Free7.6 Two bars Freshcaller Free tier No. 6$15/mo7.6

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 Freedom251

Best Business Phone Systems in 2026#115 of 174
Best SIP Trunking Providers in 2026#19 of 30

Is Gamma Horizon yours?

Claim it for free: prove the domain, then correct facts, plans and screenshots. An editor reviews every change.

Claim it free Promote Gamma Horizon

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