0330 122 7006              [email protected]

VOIP Telephone Solutions

Starting Out

Prefect for 1 to 5 users

£4.49

per user / per month*

  • 100 Free Outbound Mins Included (Per User)
  • Free Phone Numbers (1 Per User)
  • Time Of Day Routing
  • Call Screening & Blocking
  • Call Logs and Recording
  • Call Parking
  • Multi-Device Support

Flying High

Best Value

Prefect for 5 to 19 users

£13.99

per user / per month*

  • All Starting Out Features Plus
  • 750 Free Outbound Mins Included (Per User)
  • Free Phone Numbers (2 Per User)
  • Caller ID Routing
  • IVR Call Menus
  • Call Monitoring
  • CRM Integration

Enterprice

20 plus users

£22.99

per user / per month*

  • All Starting Out/Flying High Features Plus
  • Unlimited Outbound Mins Included
  • Free Phone Numbers (3 Per User)
  • Free Custom Setup
  • Text To Speech
  • Voicemail Transcription
  • Call Queueing

* This price is based on 5 or more users.

Plan Comparison

Free

Essentials

Premium

Enterprise

Campaigns

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Live Chat

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No Daily Limit

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Personalization

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CRM Platform

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Multi-user Access

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Marketing Automation

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Customer Success Manager

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SSO (SAML)

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Priority Sending

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Cloud VOIP Phone Systems for London, Essex & Kent

ISG designs, hosts and manages cloud VOIP telephone systems (including 3CX) for businesses across London, Essex and Kent. Cut line rental and call costs, keep your existing numbers, and let your team answer calls from the office, home or mobile — all on one system.

VOIP migration without the drama

We handle number porting, call-flow design, handset provisioning and staff training. Most migrations complete with zero downtime: your old system runs until the moment the new one takes over. Integration with Microsoft 365 means presence, contacts and Teams calling work together.

Managed VOIP support

Unlike a telecoms reseller, we’re an IT support company — so when a call quality issue is really a network issue, one team owns it end to end. We monitor your system, apply updates and answer support calls in an average of 49 seconds.

Looking for a VOIP provider in London, Basildon, Thurrock or Southend-on-Sea? Call 0330 122 7006 for a demo and like-for-like cost comparison.