Ask five South Africans which network is “the biggest” and you will get five different, all defensible answers, because the honest answer depends entirely on what you are counting: subscribers, revenue, market value or network coverage all produce a different order. This ranks the five operators that matter to a South African business by the metric that is actually stable and comparable across all of them: how many people are on their network.
1. Vodacom, 50.7 million subscribers
Vodacom is South Africa’s largest mobile network by a clear margin, with 50.7 million mobile subscribers as of December 2024, MyBroadband reported, majority owned by UK-based Vodafone Group. Its scale shows up in coverage rather than headline growth: Vodacom’s network reaches deeper into rural and small-town South Africa than any rival, which matters directly to a business whose staff, drivers or customers are not all based in a metro.
2. MTN, 39.2 million subscribers in South Africa, the bigger group by value
MTN South Africa counted 39.2 million users as of September 2024. Group-wide, MTN is the more valuable listed entity of the two: it added R100 billion in market value during 2026 alone in its own race to become the first South African telecoms company worth R500 billion, TimesLive reported in July. Second place on subscribers, but the market’s clearer favourite on where the business itself is headed.
3. Telkom, 24 million mobile subscribers and the fastest-growing of the big three
Telkom’s mobile arm has quietly become the interesting story in this list: from a distant third for years, it has been consistently taking mobile market share from both Vodacom and MTN, MyBroadband’s own reporting on the trend noted, built substantially on data-heavy, price-competitive plans aimed at exactly the small business and prepaid consumer segment that decides where its next connection goes.
4. Cell C, 7.7 million subscribers and a business built on restructuring
Cell C, historically South Africa’s third mobile network, has spent recent years under significant financial restructuring, with 7.7 million subscribers as of May 2024. It no longer competes on raw network scale, having moved to a roaming arrangement with MTN’s infrastructure for much of its coverage, but it remains a real, price-focused option, particularly for cost-sensitive SME accounts.
5. Rain, roughly 750,000 subscribers, the newest full network
Rain became South Africa’s fourth full mobile network operator in May 2023 with the launch of its rainOne plan, combining unlimited 5G home wifi with mobile voice, SMS and data in a single product, at roughly 750,000 subscribers. Small by the standards of this list, but the only entrant built from scratch around 5G and fixed-wireless home connectivity rather than a legacy 2G/3G network, which is a genuinely different bet on where South African connectivity is headed.
What this actually means for a business choosing a network
Combined, MTN and Vodacom control more than 70% of South Africa’s mobile service revenue between them, a scale advantage that shows up as better urban and rural coverage but not necessarily the best price for a growing SME’s data and voice bill. Total mobile subscriptions in South Africa reached 117.32 million in 2025 across all five networks, more connections than people, since many South Africans carry more than one SIM specifically to arbitrage exactly this kind of network-versus-price trade-off.
Whichever network a business settles on, the operating cost around it, staff data allowances, business-grade contracts, backup connectivity for load-shedding-prone premises, is the number worth actually modelling rather than assuming the biggest network is automatically the right one. Our guide to practical AI and digital tools for South African owners covers where a lean operating budget is best spent once connectivity itself is sorted.
