Two real options. One probably fits you better.
Both are credible cloud-PBX choices for SA businesses replacing legacy hardware. They have meaningful differences in licensing model, feature depth, integration approach, and operational economics. The right answer isn't universal — it depends on how your team actually uses the phone.
Disclosure: we're a 3CX Gold Partner. That means we have skin in the game on one side. We've written this comparison straight — the situations where Teams Phone is the better choice are written as honestly as the situations where 3CX wins.
The real differences. No spin.
| Dimension | Microsoft Teams Phone | Hosted 3CX |
|---|---|---|
| Licensing model | Per user, per month | Per simultaneous call (concurrent capacity) |
| Best fit team size | Small teams, all heavy phone users | Any size, especially mixed-use teams |
| Microsoft 365 integration | Native — calendar, presence, contacts | Direct Routing brings 3CX into Teams |
| Call recording | Add-on licence (Teams Premium) | Included; per extension or queue |
| Live wallboards / queue analytics | Available with add-ons | Included natively |
| WhatsApp Business integration | Not native | Included — messages flow into 3CX inbox |
| Live chat website widget | Separate product | Included |
| CRM integration (Salesforce, HubSpot, Zoho) | Available via apps | Included; click-to-dial native |
| SIP trunk choice | Limited; Direct Routing complexity | Any tested SIP — Vox, Telkom, ECN, MTN, international |
| Mobile apps (iOS / Android) | Native (Teams app) | Native (3CX app) |
| Web client | Browser-native | Browser-native |
| Desk handsets (Yealink, Snom, Cisco) | Certified handsets only | Most major brands; auto-provisioning |
| Total cost — small team, light use | Comparable | Typically lower (concurrent licensing) |
| Total cost — full call centre | Add-ons accumulate quickly | Materially lower at call-centre scale |
| Local SA support | Microsoft global support | Local engineering team, direct vendor escalation |
Honest decision framework.
Microsoft Teams Phone is the better fit if:
Your team is heavily resident in Microsoft 365 and Teams already; everyone uses the phone all day; you want one tool for collaboration and calls; you're not running a call centre or service queue; and you'd rather pay per-user than think about concurrent capacity. Teams calling is good — it's just optimised for a different kind of phone usage.
Hosted 3CX is the better fit if:
You're running a call centre, customer service queue, or sales floor; you have many staff who occasionally use the phone (concurrent licensing pays back hard); you need WhatsApp / live chat / CRM integration in the same console; you want call recording included; you need flexible SIP trunk choice for least-cost routing; or you want local SA support and a local data residency posture. The platform pays back through lower per-user economics and richer feature inclusion.
The hybrid path:
3CX Direct Routing into Microsoft Teams gives you the Teams interface that staff already know — with the full 3CX PBX (and its licensing economics, feature depth, and SA support model) running behind it. Best of both worlds for organisations heavily resident in M365 but with PBX-grade calling needs.
3CX vs Teams questions.
Why not just use Microsoft Teams Phone if we already have Microsoft 365?
If your team is heavily Microsoft 365-resident, Teams calling has real advantages — single sign-on, calendar integration, and consolidation of communication channels. The trade-offs are licensing model (per-user, all-or-nothing), per-user feature add-ons (call recording, attendant console), and call-centre style functionality (queues, wallboards, agent reporting) that 3CX includes natively. The right answer depends on whether you need PBX or you need Teams + calls.
Can hosted 3CX integrate with Microsoft Teams?
Yes — 3CX Direct Routing into Microsoft Teams gives you the Teams interface for calling with the full 3CX PBX behind it. Best of both worlds for organisations that want Teams-native UX but the licensing model and feature depth of 3CX.
Is 3CX cheaper than Teams Phone?
It depends on team size and how the system is used. 3CX licenses per simultaneous call (concurrent capacity), while Teams Phone licenses per user per month. If you have many staff who occasionally use the phone, 3CX is materially cheaper. If you have a small team where everyone is on the phone all day, the gap narrows.
Which one is better for call centres?
3CX is built for call centre operations — queues, skill-based routing, live wallboards, agent performance reporting, queue stats, abandoned-call analysis, all included. Teams Phone has equivalent features but they're add-on licences, and the call centre experience tends to be less mature than dedicated 3CX or comparable specialised platforms.
Does load-shedding affect either platform?
Both run as cloud services so the platform itself stays up. The difference is in the endpoints. 3CX mobile apps work on cellular data — your team stays reachable through every load-shedding stage. Teams calling on mobile works the same way. The on-premise infrastructure (PBX, NVR, or office server) failing during outages is a problem with neither — they're both cloud platforms.
As a 3CX Gold Partner, are you objective?
We're 3CX-aligned, and we'll tell you that up front. But for customers heavily resident in Microsoft 365 with simple calling needs and small teams, Teams Phone is genuinely a better fit and we'll say so. Honesty about fit is more useful than universal advocacy.
Talk to us.
Book a 30-minute demo and we'll show you Swiss Systems on a real workload.