CM.com — Global CPaaS platform with SIP trunking and voice APIs, offices in Cape Town and Johannesburg
CM.com is a Dutch-listed communications platform (CPaaS) that has run conversational infrastructure since 1999 and serves its South African customers from offices in Green Point, Cape Town and Bryanston, Johannesburg. For a telecoms buyer the relevant products are its SIP trunking service, a Voice API and DDI numbers in 80-plus countries, all managed through a self-service Voice Management app; around those sit SMS, WhatsApp and email gateways, an agent inbox, a customer data platform and its “HALO” AI agents. It is a platform you connect your own PBX or contact centre to, not a hosted PBX with handsets.
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Key facts
| Who they are | A global CPaaS provider founded in the Netherlands in 1999 and ranked a CPaaS leader by Juniper Research, with a South African region site (cm.com/en-za), local sales and support numbers, and two SA offices |
| SIP trunking | Cloud SIP trunks created in the Voice Management app or via API, with per-trunk capacity limits, destination and cost-based traffic blocking, least-cost routing and per-second billing; geo-redundant platform. The site says trunks can be combined with your own cloud or on-premises PBX |
| Voice API | Programmable inbound and outbound calling for contact centres, notifications and OTP calls, alongside SMS, WhatsApp, email and business-messaging APIs and a reseller portal with custom price plans |
| Numbers | Geographic, national and toll-free DDI numbers in more than 80 countries; existing numbers can be ported to CM.com |
| SA offices | 16 Ebenezer Road, The Foundry, Green Point, Cape Town 8001 · Future Space, 2 Bruton Road, Bryanston, Johannesburg 2191 |
| Contact | Sales +27 (21) 180 2560 · Support +27 21 300 2250 (hours are published in CEST, i.e. European business hours) |
| ICASA licence | Not published on the SA site. CM.com is a licensed payment service provider in the EU; ask which South African licensed operator terminates its SA voice traffic and whether SA number porting is supported end to end |
| Pricing | Not published for voice or SIP trunking. The pricing page lists SMS and OTP as one price per country and the platform suites (Connect, Activate, Support) as Core/Plus/Max tiers on request; the SIP page claims per-second, transparent pricing and “up to 30%” call-cost savings |
| Listed In | VoIP Providers |
A developer and enterprise platform, not a phone-system vendor
CM.com’s South African presence is real — two offices, local dialling codes, a PAIA manual on the site — but its product is the platform underneath conversations rather than the phones on a desk. The voice pieces a WhichVoIP reader will care about are the SIP trunk (self-provisioned in minutes, capacity you can raise without hardware, per-second rating) and the Voice API for building calling into applications and contact centres. Both assume you already have a PBX, a contact-centre platform or developers, and the commercial model is usage-based rather than a per-extension rental. That makes CM.com a strong fit for a company that wants one supplier for SMS, WhatsApp and voice at volume, and a poor fit for a business that needs a hosted PBX with handsets, a local installer and a monthly per-user price. Compare the wider market in the VoIP provider directory.
Who CM.com is a fit for
- Enterprises and contact centres that want SIP trunks and voice, SMS and WhatsApp from one platform
- Software teams building calling or notifications into their own applications via API
- Multinationals that need DDI numbers across many countries under one account
How CM.com sits in the VoIP category
- 264 verified VoIP providers on WhichVoIP; 171 carry a Google rating.
- Google 5.0 from 5 reviews — top 8% of rated providers in the category (11 rate higher).
- Category median is 37 reviews, so this is a smaller sample than most.
Computed from the WhichVoIP provider register; refreshes as ratings and reviews change.
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Compare VoIP providers →Commonly asked questions
What does CM.com offer in South Africa?
SIP trunking, a Voice API, DDI numbers in more than 80 countries, and messaging channels (SMS, WhatsApp, email, business messaging) on one platform, plus an agent inbox, a customer data platform and HALO AI agents. It is served from offices in Cape Town and Johannesburg with local sales and support numbers.
Where is CM.com based?
Its head office is in the Netherlands; in South Africa it lists The Foundry in Green Point, Cape Town, and Future Space in Bryanston, Johannesburg.
How much does a VoIP service through CM.com cost?
CM.com does not publish South African voice or SIP-trunk rates. The SIP page describes per-second billing, least-cost routing and savings of up to 30% on call costs, but the actual rate card and any platform fees come through a sales quote. Ask for the per-second termination rates to SA mobile and fixed numbers, monthly number rental and any minimum commitment. For reference, the 8 verified VoIP providers on WhichVoIP that do publish prices charge R50–R499 per month for a line or SIP trunk, with calls billed per minute, so expect a quote in that band. Compare published prices or get up to 3 quotes.
Can I use a CM.com SIP trunk with my existing PBX?
Yes. The SIP trunk is designed to connect to your own cloud or on-premises PBX, and it is configured in the Voice Management app or through the API, with capacity limits and traffic controls per trunk.
Does CM.com provide a hosted PBX with handsets?
No. It provides the trunk, numbers and APIs; the PBX, contact-centre software or application is yours. Businesses that want a managed hosted phone system should compare dedicated South African cloud PBX providers instead.
Is CM.com an ICASA-licensed operator?
The SA site does not publish an ICASA licence. Ask which licensed South African operator carries and terminates its SA voice traffic and confirm the porting process for South African numbers before you commit.
This listing is maintained by WhichVoIP, an independent South African telecoms comparison service running since 2019. Details are verified against the provider’s public website and were last reviewed on 8 September 2026.