AI Cloud Phone System vs Microsoft Teams Phone
AI Cloud Phone System vs Microsoft Teams Phone: Which Should UK Businesses Choose?
With the PSTN switch-off deadline set for January 2027, every UK business needs a PSTN switch off phone system replacement. Two popular options keep coming up in conversations: AI-powered cloud phone systems and
Microsoft Teams Phone.
The VoIP vs Microsoft Teams debate matters because both work over the internet and both can replace your old landlines, but they are very different in how they work, what they cost, and what features you actually get. Picking the wrong one could leave your team frustrated or paying for things you do not need.
Here is a clear breakdown to help you decide.
What Microsoft Teams Phone Actually Offers
The Microsoft Teams Phone System UK adds calling features to your existing Teams app. You can make and receive external calls from your computer, mobile, or desk phone. For teams already using Teams for chat and video meetings, adding phone calling feels like a natural extension.
Where Teams Phone Works Well
Businesses that already pay for a Microsoft 365 phone system can add Teams Phone for a relatively low per-user cost. Everything sits inside one app, which reduces the number of tools your team needs to learn.
- Voice calls, voicemail, and call queues built into Teams
- Works on desktop, mobile, and web
- Familiar interface for Microsoft 365 users
Where Teams Phone Falls Short
The base Teams Phone licence does not include external calling minutes. You need to purchase a separate calling plan or connect a third-party SIP trunk provider, which adds complexity. Advanced
call routing features like multi-level IVR menus, ring groups, and detailed call analytics are either limited or require additional add-ons. CRM integration is minimal without third-party tools, and AI-powered features often require a separate Microsoft Copilot licence at extra cost.
For businesses that rely heavily on incoming calls, customer service lines, or need detailed call reporting, Teams Phone can start to feel thin.
What AI Cloud Phone Systems Offer
A cloud phone system no Microsoft 365 required is a standalone
VoIP phone system built specifically for business voice communications. No dependency on Microsoft 365 or any other platform is needed. You plug in your desk phones, install an app on your mobile, and you are ready to go.
Built-In Features That Come Standard
When weighing VoIP vs Microsoft Teams, the feature gap becomes clear quickly. Most plans include auto-attendant,
call recording, ring groups, IVR menus, voicemail-to-email, and mobile apps as standard.
- AI-powered call transcription and summaries
- CRM integration with tools like HubSpot, Salesforce, and Zoho
- Advanced call reporting and analytics dashboards
- Call queues and skills-based routing
Flexibility Without Lock-In
A business phone system without Microsoft gives you the freedom to pair your phone platform with whatever business tools your team already uses, whether that is Google Workspace, Microsoft 365, or something else entirely. Adding or removing users takes minutes rather than requiring licence management across multiple platforms.
Cost Comparison for UK Businesses
Pricing can be confusing because Teams Phone has multiple layers. Here is how the numbers typically break down for a team of 10 users.
With a Microsoft 365 phone system setup, you need at minimum a Microsoft 365 Business Basic subscription (roughly £4.60 per user per month), plus a Teams Phone licence (from around £6.60 per user per month), plus a calling plan or SIP trunk for external calls. Total costs often land between £15 and £30 per user per month once everything is included.
The best
cloud phone system UK 2026 options typically start from around £10.95 per user per month and include UK calls, all core features, and no additional platform subscriptions. For businesses not already paying for Microsoft 365, that difference adds up quickly.
Getting Ready for January 2027
Whichever option you choose, the clock is ticking. Every business still running analogue or
ISDN lines needs a
PSTN switch off phone system replacement in place before 31 January 2027, when the old copper network closes permanently.
Moving early gives you time to test your new system, train your team, and resolve any issues without pressure. Waiting until late 2026 risks delays as demand for migration support increases across the UK.
Conclusion
Both Microsoft Teams Phone and AI cloud phone systems solve the same problem, but they solve it differently. Teams Phone suits businesses already living inside the Microsoft ecosystem who want simple, low-volume calling. For those considering Teams Phone alternatives UK, a standalone AI cloud phone system offers full-featured call management from day one, without the need for additional platform subscriptions.
The VoIP Shop helps UK businesses choose, set up, and migrate to the right cloud phone system, with free consultations, number porting, and 24/7 UK-based support.
FAQs
Can I use Microsoft Teams Phone without Microsoft 365?
No. Teams Phone requires an active Microsoft 365 or Office 365 subscription as a prerequisite.
Is a cloud phone system no Microsoft 365 required actually possible?
Yes. A cloud phone system no Microsoft 365 required runs entirely independently, connecting through your broadband connection without any dependency on Microsoft's platform or licences.
Is an AI cloud phone system more expensive than Teams Phone?
Not typically. Once you factor in the Microsoft 365 phone system subscription, calling plans, and add-on licences, standalone cloud phone systems often cost less overall, particularly for businesses not already using Microsoft 365.
Can I keep my existing phone number with either option?
Yes. Both options support number porting, which lets you transfer your current business numbers to the new system.
Do I need desk phones for a cloud phone system?
No. Cloud phone systems work on desk phones, mobiles, laptops, and tablets. Many businesses use softphone apps without any physical handsets.
Will Teams Phone work after the PSTN switch-off?
Yes, because Teams Phone operates over the internet and does not depend on copper phone lines. That said, every business still needs to confirm their chosen PSTN switch off phone system replacement is fully configured before the January 2027 deadline.
Can I integrate my CRM with both systems?
Teams Phone has limited native CRM integration. AI cloud phone systems typically offer direct integration with platforms like HubSpot, Salesforce, Zoho, and many others.
