In brief: South Africa’s wholesale VoIP market is shaped by ICASA’s progressive call termination rate reductions (R0.07/min mobile in 2025, dropping to R0.04/min by July 2027), a growing pool of carrier-grade SIP providers, and increasing demand from hosted PBX resellers needing reliable, scalable voice infrastructure. Key providers include Vox Telecom, Euphoria, Saicom, Wanatel, BitCo, and AVOXI. Choosing correctly determines your customer’s call quality and your margin.
The quality of your upstream wholesale VoIP provider determines everything about the voice experience your customers receive. Latency, jitter, dropped calls, and poor audio quality are almost always a carrier or connectivity problem — not a PBX problem. For South African resellers deploying hosted 3CX, Yeastar, Avaya Cloud, or Microsoft Teams Calling, the wholesale VoIP layer is the foundation everything sits on.
This guide covers the major SA wholesale VoIP providers, what differentiates them, current ICASA call termination rates that underpin all pricing, and what to look for when choosing a carrier for your reseller practice.
Wholesale vs. Retail VoIP: Understanding the Difference
A wholesale VoIP provider targets resellers, carriers, and enterprises with bulk volume contracts, SIP trunking infrastructure, number portability capabilities, and enterprise-grade SLAs. They typically do not deal directly with small end users and their pricing assumes volume commitments.
A retail VoIP provider sells directly to small businesses or individuals, often without minimum volumes, with simpler pricing and self-service portals.
As a telecoms reseller, you need a wholesale carrier relationship — even if your end customers are SMEs. Your upstream provider must be able to handle number porting on your behalf, provide a reseller management portal, offer white-label options, and deliver carrier-grade reliability with documented SLAs.
ICASA Call Termination Rate Glide Path (2025–2027)
Understanding termination rates is essential for pricing VoIP services accurately and competitively. ICASA’s Call Termination Rate regulations set a glide path of progressively reducing interconnect costs:
| Effective Date | Mobile (Large Operators) | Fixed (Large Operators) | Mobile (New Entrants) | Fixed (New Entrants) |
|---|---|---|---|---|
| July 1, 2025 | R0.07/min | R0.05/min | R0.09/min | R0.06/min |
| July 1, 2026 | R0.05/min | R0.04/min | — | — |
| July 1, 2027 | R0.04/min | R0.01/min | — | — |
These rates represent the cost mobile and fixed operators charge each other for terminating calls on their networks. For VoIP resellers, the practical implication is that cost-per-minute for SA calls should be declining through 2027 as this glide path feeds through to wholesale pricing. If your carrier is not passing these savings through, it’s worth reviewing your contract terms.
Major Wholesale VoIP Providers in South Africa
Vox Telecom
One of South Africa’s largest integrated ICT providers, Vox offers wholesale voice services alongside its own Vobi UCaaS platform. Vobi business packages include uncapped national calling from R149/user/month. Strong choice for resellers who also need to offer connectivity (fibre, LTE) bundled with voice — Vox provides both from a single wholesale relationship.
Best for: Resellers wanting a single provider for voice + connectivity wholesale.
Euphoria Telecom
A South African-built cloud PBX and SIP provider with 14+ years of SA-specific experience. Euphoria’s reseller programme includes white-label options and its proprietary platform (not 3CX or Yeastar). Cloud PBX from R45/extension/month. Strong on SA number portability and local carrier relationships.
Best for: Resellers who want a fully South African-built platform with strong local support.
Saicom
Founded in 2005, Saicom is a carrier-grade cloud communications provider with enterprise SIP trunking, routing, and Microsoft Teams Direct Routing integration. Strong choice for resellers handling large enterprise accounts with complex multi-site or Teams integration requirements.
Best for: Enterprise deployments and Microsoft Teams Calling integration.
Wanatel
Over 20 years in the SA telecoms market, Wanatel offers cloud PBX wholesale and white-label reseller programmes. Established reseller infrastructure with a track record in the SA market. Suitable for resellers wanting a structured partner programme with wholesale pricing tiers.
Best for: Established resellers wanting a proven partner with white-label options.
BitCo Telecoms
Wholesale voice and data for ISPs and telcos, with Class ECNS/IECNS licence holding enabling direct number allocation. BitCo’s wholesale carrier service offers scalable, customisable voice features and is positioned toward ISPs adding voice to their connectivity offerings.
Best for: ISPs and connectivity resellers adding voice to their product mix.
AVOXI
International wholesale SIP trunking provider with Tier 4 data centres in Johannesburg and Cape Town. 99.995% uptime SLA — among the highest in the SA market. AVOXI is particularly strong for businesses requiring international termination alongside SA local numbers, and for call centre environments where uptime SLAs are contractually required.
Best for: Contact centres, international businesses, and deployments where uptime SLA documentation is required.
SkyWire
Carrier-grade voice with SA number porting and PortaOne-based billing infrastructure. Offers wholesale and white-label options. SkyWire’s PortaOne platform is well-regarded for billing accuracy and supports complex retail tariff structures.
Best for: Resellers building their own branded retail VoIP offering with sophisticated billing.
What to Evaluate When Choosing a Wholesale VoIP Provider
1. Uptime SLA and Redundancy
Minimum acceptable: 99.9% (8.7 hours downtime/year). Preferred: 99.99% (52 minutes/year). Ask specifically about geographic redundancy — does the carrier have equipment in both Johannesburg and Cape Town? Carrier failures during business hours will reflect on your business even if it’s not your infrastructure.
2. Number Portability Support
Your wholesale provider must actively support all three portability types: geographic, mobile, and non-geographic (including 0800 and 087). Verify the carrier’s average port completion time — industry standard in SA is 5–10 business days. Ask specifically about their NPDB (Number Portability Database) connection and whether they manage ports in-house or subcontract.
3. Reseller Management Portal
You need visibility into your customers’ call records, billing, and number inventory. A good wholesale carrier provides a reseller portal with sub-account management, call detail records (CDRs), and ideally white-label capability so your customers see your brand, not the carrier’s.
4. SIP Trunk Capacity and Concurrent Calls
Ensure the carrier can provision the exact SIP trunk capacity you need. For 3CX deployments, your SIP trunk concurrent call count should match your 3CX SC licence count. Confirm whether the carrier charges per-channel (concurrent call) or per-minute, and which model better suits your customer mix.
5. Call Quality and Codec Support
G.711 (uncompressed) is the gold standard for call quality on adequate bandwidth; G.729 (compressed) is used where bandwidth is constrained. Confirm which codecs your wholesale carrier supports. For customers on fibre, always use G.711. For mobile or satellite backhaul, G.729 is worth supporting.
6. Disaster Recovery
What happens to your customers’ calls if the carrier has an outage? A good wholesale provider offers automatic failover to a secondary gateway, plus the ability to configure overflow routing to mobile or alternative SIP providers at the 3CX/PBX level. Build this into your standard deployment template.
Positioning VoIP Services for SA Businesses
The SA VoIP market opportunity is large and still largely undersold. Consider:
- PABX replacement: Thousands of SA businesses are still running on-premises PABX systems installed during the 2010–2015 boom, many now at or past end-of-life. The cloud PBX replacement sale is your primary volume opportunity.
- Telkom line migrations: Each Telkom Business Line migrated to VoIP is a recurring revenue win. With Telkom’s continued focus on enterprise and reduced investment in legacy fixed-line infrastructure, the migration pressure on SMEs is real.
- Bundled connectivity + voice: ISPs adding VoIP to fibre packages are capturing higher monthly recurring revenue from the same customer. If you can bundle the connectivity and the voice from the same platform, you reduce customer churn and simplify support.
Frequently Asked Questions
What is a wholesale VoIP provider in South Africa?
A wholesale VoIP provider sells SIP trunking, number portability, and voice termination infrastructure to resellers, ISPs, and enterprises — not directly to end consumers. They offer reseller portals, white-label options, and volume pricing. Major SA examples include Vox Telecom, Euphoria, Saicom, Wanatel, BitCo, and AVOXI.
What are the current VoIP call rates in South Africa?
ICASA’s Call Termination Regulations set interconnect rates at R0.07/min to mobile networks and R0.05/min to fixed networks for large operators from July 1, 2025. These rates reduce to R0.05/R0.04 in July 2026 and R0.04/R0.01 in July 2027. Retail VoIP rates to end customers are higher and set by individual providers.
Do I need an ICASA licence to resell VoIP in South Africa?
Resellers who do not directly own numbering or network infrastructure can typically operate under their upstream carrier’s licence. However, if you intend to apply for your own numbers from ICASA or build network infrastructure, you’ll need an Individual ECS/ECNS licence. Consult with ICASA or a telecoms lawyer for guidance specific to your business model.
What SLA should I expect from a wholesale VoIP provider?
The minimum acceptable is 99.9% uptime (approximately 8.7 hours of unplanned downtime per year). For contact centre and enterprise deployments, seek 99.99% SLAs (52 minutes/year). AVOXI offers 99.995% — the highest documented SLA among SA-serving providers.
About the Author
Mechelle Gindra
Mechelle Gindra is the managing editor and lead content strategist at Telecoms-Channel, South Africa's dedicated intelligence platform for telecoms resellers, ICT distributors, and channel partners. She oversees the editorial team's AI-assisted content production pipeline, ensuring vendor news, market analysis, and regulatory updates are accurate, timely, and actionable for the SA telecoms channel community. With deep expertise in the South African telecoms reseller ecosystem, Mechelle directs coverage of vendor partner programmes, ICASA regulatory developments, wholesale market dynamics, and channel business strategy. She is responsible for maintaining Telecoms-Channel's editorial standards, fact-checking processes, and corrections policy.
