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.
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. Among the 13 providers that publish an entry fibre price, plans run from R279 to R795 a month (median R475, sampled August–September 2026); business plans with an SLA sit above that entry band.
This guide walks you through what you need to understand before you sign: how the FNO/ISP split works, what published plans cost and what hides behind the headline price, which speed you actually need, why contention and the SLA matter more than megabits, and which ISPs score highest in our independent reviews. When you're ready to compare specific providers, use the fibre comparison page; when you're ready to buy, we'll match you with three ISPs serving your address.
Start with the network: find which FNOs reach your address, then choose an ISP that sells on one of them. Published entry plans among 13 providers run R279–R795 a month; for an office that depends on its connection, buy a business plan with an SLA rather than the cheapest home tier. For a ranked shortlist, see the best ISPs in South Africa; to compare published prices side by side, use the fibre comparison. How the ISPs we review score ↓
In South Africa you buy fibre from an ISP that resells capacity on a Fibre Network Operator covering your address. Among the 13 providers that publish an entry fibre price, plans run from R279 to R795 a month (median R475, sampled August–September 2026). For most offices, a mid-tier business plan with an SLA and low contention matters more than headline speed. Per-provider prices are on the fibre comparison.
WhichVoIP is an independent telecoms comparison site. We sell no fibre, sponsors are always disclosed and never move up a ranking. Everything here is drawn from primary sources: the rate cards providers publish on their own websites, the Fibre Network Operators' own coverage and product pages, and the ICASA licensing framework for electronic communications services, alongside our own catalogue of independent reviews and directory listings (36 fibre providers reviewed, 329 listed at the time of writing).
A price appears on this page only if it is a published rate we have sampled and dated; where we cannot bind a figure to a provider's own rate card, we leave it out rather than estimate it. Per-provider figures live on the comparison page, which is refreshed from the same fact base. Our reviews score providers across five dimensions (pricing value, feature set, customer reviews, reliability and support quality). Where anything here differs from a provider's live rate card, the rate card wins – check it before you sign. Last reviewed: September 2026.
Fibre optic cables carry data as pulses of light through hair-thin strands of glass. Unlike copper, the signal doesn't degrade meaningfully over distance, doesn't suffer from electromagnetic interference, and isn't affected by weather. That's why a fibre connection in Sandton runs at the same speed as one in Stellenbosch on the same plan, and why a video call from your office doesn't stutter when someone switches on the kettle.
In practice, the cable runs from the Fibre Network Operator's nearest point of presence to a small termination box on your building, and a second short fibre is pulled inside to an ONT and your router, which turns the light signal into normal Ethernet and Wi-Fi. The on-site install is usually a short visit; the lead time before it depends on whether the FNO already passes your building or still has to trench the street, so ask the ISP for a dated install slot, not an estimate.
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 before you sign.
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:
| 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 |
Skip ahead to compare fibre ISPs side by side, with their published prices.
Headline pricing is misleading because it ignores installation, router rental and exit terms, and because home and business tiers on the same line are priced very differently. Read the market by the shape of the product rather than by one "average" number:
| 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 fibre Most 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 |
Of the South African providers in our fact base, 13 publish an entry fibre price on their own websites. Those entry prices run from R279 to R795 a month, with a median of R475 (sampled between 8 August and 13 September 2026). Some are quoted including VAT and some excluding it, and the entry speed differs by provider, so compare like with like. Business tiers with an SLA sit above this band and are often quoted. We do not print an "average business fibre price": no provider publishes one, so the figure would be ours, not theirs. Per-provider rates are on the fibre comparison page.
Ask for the all-in monthly and once-off cost before you sign: installation (often waived on a fixed-term contract, charged on month-to-month), router rental or purchase if it isn't bundled, the early-exit terms if you might move office, and whether the price includes VAT. The cheapest line fee is rarely the cheapest 12 months.
Ask for the all-in cost before you sign: installation, router, the early-exit clause and the VAT basis. A cheap line fee on a long contract can cost more than a dearer month-to-month plan if you move office.
Speed is the easiest thing to overbuy. Contention, the SLA and support usually matter more to how the line feels day to day. Here's what each tier is realistically good for.
Fine for one or two people doing email, Slack, web browsing, and the occasional Zoom call. Don't go below 25 Mbps if anyone on the team takes back-to-back video calls.
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.
The bottom line: a 50–100 Mbps business line comfortably handles 5–20 users, video calls and a desk phone or two, so it's the sensible place for most small offices to start. Go higher when you have a specific reason.
Genuinely necessary if you have 40+ users, run a contact centre, push a lot of video, or move large files daily (architects, video editors, data teams). Below 40 users, more speed mostly means a more expensive bill.
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.
The number on your fibre contract is not the number you'll get at 8pm — the contention ratio decides that.
A Service Level Agreement is the contractual commitment your ISP makes about how the service will behave. Five things to look for:
If your business depends on internet (e-commerce, SaaS, a contact centre, VoIP), the SLA is the single most important part of the contract. If you're a freelancer who can move to a coffee shop when the connection drops, the SLA matters less and the price matters more.
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.
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:
If your office runs VoIP, cloud apps or a call centre, the business SLA and contention ratio matter far more than extra headline speed. Compare business SLAs side by side on the fibre comparison page, or get matched with three ISPs serving your address.
Vetted fibre ISPs, filtered by FNO, speed, SLA, and price.
Every ISP with a published WhichVoIP score for its fibre service, highest first, so you can check a supplier before you buy. For our ranked shortlist, see the best ISPs in South Africa. Scores are out of 10 across five dimensions (pricing value, feature set, customer reviews, reliability, support quality) and link to the review they come from. The network operators behind them are scored separately in section 2. The last column says who each ISP suits.
| # | ISP | Score | Consider them if |
|---|---|---|---|
| 1 | RSAWEB | 7.9 | You need connectivity and hosting from the same supplier |
| 2 | Afrihost | 7.7 | You want no contract and a supplier whose service record you can check publicly |
| 3 | Webafrica | 7.5 | You want the reassurance of scale and pricing you can see before you call |
| 4 | Cool Ideas | 6.8 | Network performance matters to you more than price or bundled extras |
| 5 | Cybersmart | 6.6 | You are buying connectivity and hosting as one decision |
| 6 | Mweb | 6.5 | You want a name you already recognise and pricing published in full |
| 7 | Herotel | 5.7 | You are in a town the open-access networks have not reached |
| 8 | Supersonic | 4.8 | You want a simple retail fibre package and can live without a business SLA |
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 table above. Sponsors are marked.
These are reviewed on the same five dimensions but sit outside the shortlist for most business fibre buyers. They remain worth a look if one of them already serves your business: MTN Business, Vodacom Business and Telkom.
Compare fibre providers side by side, with published prices → · Browse all 329 fibre providers in the directory →
