Gamma Horizon
Gamma Horizon: A managed VoIP system with broad routing, CRM, mobile and collaboration capabilities. Ranked #106 of 166 in Business Phone Systems by our editors (3.0/10); pricing: Pricing on request; best for established organizations wanting managed VoIP.
At a glance
- Editor score3.0 / 10
- PricingPricing on request
- Best forEstablished organizations wanting managed VoIP
- Business numbersMultiple
- Founded2001 · Newbury, Berkshire, UK
- Facts checked22 Sep 2026
Where it wins
- Configurable routing, queues and receptionist tools support complex call flows.
- Works across web, iOS, Android, desktop and mobile deployments.
- Connects with 200 integrations, including Salesforce and Microsoft Dynamics.
Where it doesn't
- Pricing is personalised through a contact-sales quote.
- Advanced collaboration and contact-centre capabilities are optional.
- Its managed-voice focus may exceed the needs of very small teams.
Our verdict on Gamma Horizon
Gamma Horizon is a cloud-hosted business phone system for organisations managing voice communications across offices, remote workers and mobile users. It combines VoIP calling with configurable routing, call queues, a receptionist console, call recording, softphone access, mobile applications and business number porting. The product is positioned for small, mid-market and enterprise organisations, with support for multiple business numbers and custom call routing.
Its ecosystem is a central strength. Horizon supports 200 integrations, including Salesforce, Microsoft Dynamics, Zendesk, Bullhorn and Zoho, giving teams established paths into CRM and service workflows. The platform is available through web, iOS and Android, with desktop and mobile deployment options. Optional capabilities extend the system into collaboration, analytics, Microsoft Teams and contact-centre use cases. That breadth makes Horizon a candidate for organizations that want voice, mobile access and business software connections within a managed communications setup.
Support is available by phone and documentation, with 24/7 support listed for the service. Gamma also provides number porting, additional numbers and business continuity options, which suit organizations coordinating communications across locations. Pricing is handled through a personalized quote rather than a named self-serve tier structure, so Horizon is better suited to buyers evaluating a managed deployment than teams looking for immediate public plan comparison. Choose it for configurable business telephony and a wide integration footprint; consider a simpler alternative if your needs are limited to basic calling.
Your product? Our editors can test Gamma Horizon in depth and publish a review, labelled as paid · from $149/mo →
Gamma Horizon pricing
Gamma Horizon fact sheet
| Free plan | Not verified |
|---|---|
| Paid from | Not verified |
| Included users | Not verified |
| Business numbers | Multiple |
| Auto attendant | Not verified |
| Call routing | Custom |
| Voicemail transcription | Not verified |
| Desktop and mobile apps | Yes |
| Deployment | Cloud, Desktop, Mobile |
| Platforms | Web, iOS, Android |
| Support | Phone, Docs · 24/7 |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 200+ integrations: Salesforce, Microsoft Dynamics, Zendesk, Bullhorn, Zoho |
| Pricing | Pricing on request (source) |
| Website | gammagroup.co |
| Facts checked | 22 Sep 2026 |
Gamma Horizon integrations
Gamma Horizon lists 200+ integrations on its own site — the 5 named here are the ones its pages call out.
- Salesforce
- Microsoft Dynamics
- Zendesk
- Bullhorn
- Zoho
Alternatives to Gamma Horizon
- RingCentral RingEXA broad cloud communications suite for established organizations with complex calling needs.9.1
- NextivaA broad business phone platform for teams that need calling, messaging, routing, and analytics.8.8
- Dialpad ConnectA unified business phone system with AI transcription, summaries, routing, and meetings.8.7
See all Gamma Horizon alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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