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View Black Castle Technologies's top competitors like Eagle Computer Services, Grid Control Technologies, and Jasco.

Vox Telecom
Vox is a leading telecoms operator, providing voice, data and collaboration services to the southern African market. The Group competes in both the business and consumer sectors and has offices in Johannesburg, Pretoria, Durban, Cape Town and Port Elizabeth as well as in Windhoek, Namibia. Vox, established in 1998, has established itself as one of the major players in the telecoms market and is one of the largest black-owned telecommunications company in South Africa. Visit us at www.vox.co.za
Johannesburg, ZA
Private
$272M Revenue
http://www.vox.co.za
2.1K Employees
Jasco
Jasco is an industrial technologies holding group dedicated to delivering cutting-edge solutions that power business growth and operational excellence. With a strong presence across South Africa and expanding globally, Jasco provides innovative, scalable, and technology-driven solutions across communications, energy, intelligent systems, asset management, and manufacturing. As a Level 1 B-BBEE contributor, Jasco is committed to economic transformation, inclusive growth, and long-term sustainability. The company’s heritage spans nearly five decades, during which it has built a reputation for engineering excellence, innovation, and customer-centric solutions that address real-world business challenges. Backed by Community Investment Holdings (CIH), Jasco leverages deep domain industry expertise, strategic partnerships, and emerging technologies to deliver solutions that enhance digital transformation, connectivity, improve energy efficiency, strengthen digital security, and optimise industrial processes. With a vision to lead change with technology, Jasco continues to shape the future of industrial innovation.
Johannesburg, ZA
Public
$41.9M Revenue
http://www.jasco.co.za
413 Employees
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Plessey
Welcome to Plessey, a leading solution provider focused on the planning, building and support of innovative ICT infrastructure across Africa. Since starting out in 1917, Plessey has continually adapted to meet the changing needs of our clients. Over nearly a century of delivering infrastructure solutions, our focus has remained the same: client-centered innovation. Ultimately, the power of what we do positively impacts our client’s ability to deliver to their customers. We measure our success by their successes. At Plessey, we don’t just settle for what is. We constantly innovate and apply our knowledge and experience to uncover what could be, rising to the challenges and opportunities presented by new technology, new markets and new ways of doing business. Innovative thinking and best practice lies behind everything we do: the structures we build, the technology we provide and the way we support and manage it for our clients. This is what leading companies and governments have come to expect of us – and we deliver.
Midrand, ZA
Private
$21.1M Revenue
http://www.plessey.co.za
391 Employees
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