The independent buyer’s guide to business fibre in South Africa – how the network operator and ISP split works, what published plans cost, what an SLA should promise, and which ISPs to shortlist.
About 3 minutes. Up to three matched ISPs that serve your address. You never pay us.
Independent WhichVoIP scores out of 10 for each ISP’s fibre service. Sponsors are marked and scored on the same rubric. How we score
Business fibre internet is broadband delivered over fibre-optic cable to your building, bought from an internet service provider (ISP) that runs its service on a Fibre Network Operator’s (FNO’s) cables. It is the fastest and most consistent connection a South African business can buy: speeds hold steady whether it’s 9am or 9pm, and it carries VoIP calls, video meetings and cloud apps without the variability of wireless.
Definitions only go so far. The easiest way to understand who does what is to follow one install, from order to your first connection.
Moving into new premises? Ask the agent on day one whether the building already has open-access fibre to the boundary or a comms cupboard. Pre-installed buildings can be activated in days; new installs into multi-tenant complexes are the long ones, usually because of the wayleave. The full installation guide →
Go deeper: what installation costs business vs home fibre uncapped vs unshaped what the router does
You don’t need to understand wavelength multiplexing, GPON architecture, or the difference between single-mode and multi-mode fibre to choose a provider. The ISP handles all of it. What you do need to understand is the commercial model, which is where most South African buyers get confused.
This is the single most important concept in South African fibre, and it trips up almost everyone the first time. There are two layers:
You almost never buy from the FNO directly. You find which FNOs cover your address (on the FNOs’ own coverage maps), then pick an ISP that sells on one of them. An ISP that only sells on Vumatel can’t help you if your building is on an Openserve-only street, no matter how good its reviews are. Both layers need an ICASA electronic communications licence for what they do; ask which network your service will run on.
We review the network operators too. Their WhichVoIP scores describe the network layer (coverage, reliability, how they treat the ISPs on their network), not a service you buy directly, so they are kept out of the ISP ranking below.
| FNO | Score | Coverage strength | Typical use case |
|---|---|---|---|
| Openserve | 6.6 | Largest national footprint | Default in most metros and suburbs |
| Octotel | 6.5 | Cape Town metro | Cape Town residential and SME |
| Evotel | 6.3 | Smaller towns, transparent wholesale pricing | Regional towns and estates |
| MetroFibre | 5.9 | Business districts | Office parks and commercial |
| Vumatel | 5.6 | Strong in Johannesburg and Cape Town residential | Estate and complex installs |
| Frogfoot | 5.5 | Growing, SME focused | Newer business parks |
Scores out of 10 on the same five-dimension rubric as the ISPs. How we score
Among the providers that publish an entry fibre price on their own websites, plans run from R279 to R999 a month (median R497, 15 providers, rate cards sampled to 28 October 2026). That is the cheapest plan each provider publishes: the entry speed differs by provider and some prices include VAT while others exclude it, so compare like with like. Business tiers with an SLA sit above this band and are often quoted.
| Product | What you pay for | Best for |
|---|---|---|
| Entry / home-grade fibre | A monthly line fee, best-effort support, no uptime commitment | Freelancers and very small offices that can work around an outage |
| Business broadband fibreMost SMEs | A higher monthly fee for lower contention, a business SLA and a faster fault-repair clock | Offices running VoIP, cloud apps and video calls |
| Dedicated / uncontended fibre | A per-site quote for capacity nobody shares, symmetrical speeds and a hard SLA | Contact centres, multi-site businesses, hosting |
| Installation | Often waived on a fixed-term contract, charged on month-to-month. What installation costs → |
| Router | Rental or purchase, if it isn’t bundled with the plan. |
| Exit terms | The early-exit clause matters if you might move office before the contract ends. |
| VAT | Some rate cards include it and some don’t. Check before you compare. |
Ask for the all-in cost before you sign. A cheap line fee on a long contract can cost more than a dearer month-to-month plan if you move office: the cheapest line fee is rarely the cheapest 12 months.
Speed is the easiest thing to overbuy. Contention, the SLA and support usually matter more to how the line feels day to day. Move the slider to see what a team your size realistically needs.
The sweet spot for most SMEs. Comfortably handles 5–20 users, multiple simultaneous video calls, cloud storage sync, and a desk phone or two. This is where most businesses should start.
If all 10 were on VoIP calls at once, that is about 1 Mbps each way. A single VoIP call uses roughly 100 kbps in each direction.
Guidance, not a quote. Entry plans start from R279 a month; business plans with an SLA cost more and are often quoted. The internet a phone system needs →
Every fibre ISP buys capacity in bulk and shares it across customers. The ratio of shared capacity to customers is the contention ratio: 1:1 means a dedicated line nobody shares; a high ratio means many customers share one pipe.
A well-run ISP sizes its capacity so you get close to the speed you pay for all day. An oversold one delivers full speed mid-afternoon and much less in the evening peak, when home users stream. For business users on standard hours this matters less; for anyone running shift work, e-commerce, backups or cloud workloads at night, it matters a lot. Business tiers are sold with lower contention for exactly this reason.
The frustrating bit: ISPs are not required to publish their contention ratios. Ask for it in writing, and read independent reviews from users in your area – our review pages surface how each ISP behaves at peak.
A Service Level Agreement is the contractual commitment your ISP makes about how the service will behave. Five things to look for:
Home and business fibre often run on the same physical line, but the contract underneath is different, and that difference is what you are paying for on a business plan:
| What you get | Business fibre business plan with an SLA | Home fibre entry / home-grade plan |
|---|---|---|
| Uptime | An SLA with service credits when the ISP misses it | Best effort |
| Peak hours | Lower contention: the line holds its speed at 9am on a Monday | Can slow when the network is busy |
| Faults | Business-hours or 24/7 support with a fault-repair clock | A support queue |
| Static IP and upload | Optional static IP and symmetrical upload for hosting, VPNs, an on-site PBX and CCTV | Varies by ISP |
| Monthly cost | Higher, and often quoted | Published entry plans from R279 a month |
If your office runs VoIP, cloud apps or a call centre, the business SLA and contention ratio matter far more than extra headline speed. Two related reads: staying reachable during load shedding and fibre vs fixed wireless vs 5G for calls.
If you only read one section of this guide, read this one. Here’s the order of operations:
Skip any of these steps and you’ll probably be unhappy within six months. Follow them and you avoid the most common contract regrets.
WhichVoIP sells no fibre. Every ISP below has a published WhichVoIP score for its fibre service, on the same five measures: price, features, customer reviews, reliability and support. Sponsors are marked and scored exactly like everyone else. Use the checks above, then rank by the measure that matters most to you. For our ranked shortlist across home and business, see the best ISPs in South Africa.
8 and above6.5 to 7.9below 6.5– not enough reviews to score
These providers sell business fibre and are on many shortlists, but their WhichVoIP score is for a different service (shown in brackets), so they are listed here by fit rather than ranked against the ISPs above. Sponsors are marked.
Also reviewed: MTN Business, Vodacom Business, Telkom and Ilitha Telecoms are reviewed on the same five measures but sit outside the shortlist for most business fibre buyers. They remain worth a look if one of them already serves your business.
Every provider is scored on the same rubric, sponsors included. How we score · how we make money
Fibre ISPs filtered by network, speed, SLA and published price – the same providers ranked above.
Among the fifteen South African providers that publish an entry fibre price, plans run from R279 to R999 a month, with a median of R497 (sampled to 28 October 2026). Business plans with an SLA, lower contention and a fault-repair commitment cost more and are often quoted. Per-provider rates are on the fibre comparison page.
The Fibre Network Operator (FNO) owns the cables in the ground, for example Openserve, Vumatel, Frogfoot, Octotel or MetroFibre. The internet service provider (ISP) rents capacity on that network and sells you the service, support and contract. You choose an FNO that reaches your address, then an ISP that sells on it.
If the building already has open-access fibre to the boundary or a comms cupboard, activation can take days. A new install moves through five stages: the order and feasibility check (a decision within a few working days), a civils survey, the wayleave approval, the cable and ONT installation, and service activation. The wayleave is the variable stage and the usual reason installs stall.
For consistent business use, yes. 5G can reach high peak speeds in ideal conditions, but fibre holds its speed regardless of weather, tower congestion or time of day. For VoIP calls, video meetings and cloud apps, fibre wins; 5G is useful as a failover or where fibre can’t reach.
Often the same physical line, but a different contract: business fibre adds an uptime SLA with service credits, lower contention so speeds hold during the working day, a committed fault-repair time and options such as a static IP. Home fibre is best-effort.
A single VoIP call uses roughly 100 kbps in each direction, so even an entry fibre line carries many simultaneous calls. What matters for call quality is low latency, low jitter and no packet loss, which come from a well-run ISP with low contention rather than from buying more megabits.
Yes, from many ISPs. The usual trade-off is that installation is charged on month-to-month and waived on a fixed-term contract, so compare the 12-month total. If you’re not sure how long you’ll be at the address, month-to-month is usually cheaper than an early-exit penalty.
The FNO’s network has its own backup power, so the line itself normally stays up. Your ONT and router don’t, so when the office loses power so does your internet. A UPS sized for the ONT, router and phones keeps you online; some ISPs supply battery-backed equipment.
On WhichVoIP’s published fibre scores: RSAWEB 7.9/10, Afrihost 7.7, Webafrica 7.5, Cool Ideas 6.8, Cybersmart 6.6, and Mweb and Your Communications at 6.5. Scores cover pricing value, feature set, customer reviews, reliability and support quality, and each links to its full review.
Covering South African business telecoms since 2010, with coverage in ITWeb, Bizcommunity, Engineering News and MyBroadband. Newsroom →
“We compare providers, we don’t sell for them. Tell us what you need in plain words. You don’t have to know the jargon.”
