3CX or Teams Phone: which suits an Australian small business?

3CX suits businesses where the phone is central: reception, queues, call handling, people who are on calls all day. Teams Phone suits businesses where calls are occasional and everyone already lives in Teams. The pricing models differ fundamentally, and that difference usually decides it more than any feature.

Start with the pricing structures, because they are not comparable and most comparisons pretend they are. Teams Phone is licensed per user per month, on top of your Microsoft 365 plan, and you may also need a calling plan or an arrangement with a telco to carry the calls. 3CX is traditionally licensed on concurrent calls rather than headcount, meaning you pay for how many conversations can happen at once rather than how many people might make one. For a business with forty staff and six people ever on the phone simultaneously, those two models produce very different numbers.

That structural difference is why the answer flips depending on your shape. A professional services firm where everyone occasionally dials a client, and where nobody wants a second application, is a natural Teams Phone business: the calls are incidental to work already happening in Teams. A trades business, a medical practice or anything with a real reception function is usually a 3CX business, because the phone is the front door and the concurrent-call model matches how few of those calls overlap.

On capability, be honest about the gap rather than pretending there is not one. Teams Phone is competent telephony inside an excellent collaboration product, and the common practitioner criticism is fair: calling was added to Teams rather than Teams being built around calling. It handles making and receiving calls, voicemail, basic queues and transfers perfectly well. A dedicated system goes considerably deeper on the things that matter to someone answering calls all day, with richer queue behaviour, a proper receptionist console, call parking, detailed reporting and contact-centre features if you ever need them.

Against that, Teams Phone has advantages that have nothing to do with telephony. One application, one identity, one set of security controls, one bill. Presence works properly, because the system already knows whether you are in a meeting. Nothing extra to deploy on laptops. For a small business without dedicated IT, having one fewer platform to administer is worth real money and real attention, and that argument frequently wins even when the feature comparison does not.

Some businesses run both, and it is a legitimate answer rather than a failure to decide. Reception and the phone-heavy roles sit on the full system; everyone else calls from Teams. It costs more than committing to one platform and it fits organisations with two genuinely different kinds of user, which describes plenty of practices, workshops and agencies.

Three practical questions settle most cases faster than any feature table. How many people are on the phone at the same time in your busiest hour, since that number prices 3CX and is usually much smaller than headcount. Does someone answer and route calls for others, because a real reception function points strongly to a dedicated system. And do your people want another application, since adoption matters more than capability and a system nobody opens is worse than a lesser one they use.

Video is the quiet tiebreaker for businesses already standardised on Teams, and it rarely gets weighed. If your meetings, internal and external, already happen in Teams, adding a separate phone platform means two applications with two sets of contacts, two places a call might arrive and two things to explain to a new starter. That friction does not appear on any feature comparison and it is felt every day, which is why businesses whose work is genuinely meeting-shaped often choose Teams Phone despite the call-handling gap.

Two things matter regardless of which you choose, and they are where deployments actually fail. Your internet connection becomes your phone line, so quality of service configuration and a failover path stop being optional; a cloud phone system on a single unmanaged connection will produce complaints about call quality that no platform choice fixes. And number porting takes planning, so start it early, because it is the item most likely to set your cutover date.

The honest caveat is that both platforms change their commercial terms, and 3CX in particular has revised its licensing more than once, which is worth checking at the point of purchase rather than trusting any article including this one. We deploy both, so the recommendation follows how you actually work. If you want it made against your real call patterns, call 1800 456 567.