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Million Subscribers Monitored

Nodes Monitored

Applications Monitored

Vendors Monitored

About Greybell

Since our founding in 2012, Greybell’s mission has been to provide purpose-built products that are designed to make Telecom professionals’ jobs easier. Our company was built by telecom and systems engineers who know what it takes to manage today’s dynamic Telecom environments. Greybell offers value-driven monitoring tools, bespoke solutions and development services that solve a broad range of IT management challenges.

Get your life back and make it easier

No more late nights in the data center. Stay in control of your charging and VAS systems 24/7 whether you are in the office or at home.

Tired of managing too many things with too many tools? Simplify your life with our all-in-one monitoring solution.

See the issues before your customer do

Stay on top of the issues with our proactive alerts and insightful reports. Get a sense that something’s wrong before it even happens and let us help you never let them see you sweat.

Grow your business and boost your ROI

Avoid profit-killing problems such as poor site performance or outages. Liberate your time and spend time on things that really matter. Grow your business instead of simply managing it.

Build your own tool

Get a tailor made software that saves you having to buy a software that nearly does what you want, but doesn't have all the facilities you need, and the trouble to make up the difference.


iMonitor is a powerful real-time monitoring and reporting application of core performance indicators, network statistics and errors for every level within a Charging and VAS environment.

The application’s role is to generate data reports and dashboards for different network elements in a Telecoms Network and display information that drill down into details across all modules. iMonitor also provides features such as Alerting, Event Handling and Automated Reporting.

iMonitor helps ensure that critical Systems, Applications and Services are always up and running. iMonitor identifies Charging System and VAS problems at early stages in order to fix them before they affect critical business processes.

Our Clients

We have been using the iMonitor tool for about a year now and have been very satisfied with its performance. The support team has been really responsive in promptly resolving all our requests. In my opinion, iMonitor is the ultimate monitoring tool for charging and VAS environments. iMonitor has served our business very well.

 The iMonitor has been deployed to monitor the Charging system and VAS environment in Nigeria, prior to then, it was becoming very unwieldy to monitor this environment because of the sheer number of nodes and also because of the complexities of the various technologies deployed for real time prepaid billing.

It provides performance statistics in a graphical form for performance trending and troubleshooting from a historical perspective as well as real time statistics on the “current” performance of various services. Also, the ability to add new functionalities on the fly in a configurable manner is unparalled.

With the deployment of the imonitor, we have been able to better assure the various services in the Charging system and VAS environment.

Olutobi Olufunwa
Act Senior Manager, CS & VAS
MTN Nigeria


Our Partners


Monitored Vendors

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