The phone system for startups
Self service with a completely free trial
Trusted by over 60,000 SME’s
24/7 UK based support
An all-in-one solution
Perfect for enterprises
1
An award winning cloud phone system with 24/7 UK support
A cloud phone system which pairs a powerful feature set with an SME friendly price tagA modern VoIP phone system built for start-ups
No contract, no credit card required
3
Designed to get UK businesses PSTN Switch-off ready
Perfect for a simple landline replacement, with a good feature set and easy administration
4
Turn Microsoft Teams into your business phone system
Powerful collaboration features, with a range of options to enable phone callingLet's compare
Comparison Table of B2B VoIP Phone Systems
Not all business phone systems are created equal, use the table below to see which best suits your needs.
| Features | PhoneLine+ |
Horizon Cloud Phone System |
Microsoft Teams Phone |
||
| Free Trial | Yes | No | No | No | |
| Contract | No | Yes | Yes | Yes | |
| Support | Yes | Yes | 24/7 | 24/7 | |
| Collaboration tools | No | No | Yes | Yes | |
| Contact Centre Capabilities | No | No | Yes | No | |
| CRM Integration | Yes | No | Yes | Yes | |
| Differentiator | Self-service, Simple Setup | Simple Landline Replacement | Comprehensive Features, Cost-Effective | Integrated Collaboration and Calling | |
| Best for | Start ups, tech savvy | Very small businesses | SME’s with more complex needs | Larger organisations already using Microsoft teams | |
| Speak to an expert | Speak to an expert | Speak to an expert | Speak to an expert |
| Feature | CircleLoop | PhoneLine+ | Horizon Cloud Phone System | Microsoft Teams Phone | Webex by Cisco |
|---|---|---|---|---|---|
| Free Trial | Yes | No | No | No | No |
| Contract | No | Yes | Yes | Yes | Yes |
| Support | Yes | Yes | 24/7 | 24/7 | 24/7 |
| Collaboration tools | No | No | Yes | Yes | Yes |
| Contact Centre Capabilities | No | No | Yes | No | Yes |
| CRM Integration | Yes | No | Yes | Yes | Yes |
| Differentiator | Self-service, Simple Setup | Simple Landline Replacement | Comprehensive Features, Cost-Effective | Integrated Collaboration and Calling | Large Scale, AI-Driven Solutions |
| Best for | Start ups, tech savvy | very small businesses | SME's with more complex needs | Larger organisations already using Microsoft teams | Large enterprise & public sector |
The buyers guide
Introduction:
When considering a new phone system, businesses might have several motivations. With the upcoming PSTN switch off, future-proofing communications is crucial. Modern VoIP systems can provide a superior customer experience, enhance employee wellbeing through improved internal collaboration, and optimize business operations with advanced analytics. Additionally, businesses with legacy infrastructure such as PBX systems or traditional telephony might need to transition to a VoIP system to stay competitive and efficient.
Why change?
Which phone system is right for you?
Best For: Tech Savvy Startups and Small Businesses Seeking Flexibility
CircleLoop
CircleLoop offers a robust, self-service VoIP phone system tailored for startups and small businesses. With no contract commitments and a user-friendly setup, it’s ideal for companies that need flexibility and a good range of features without a long-term obligation.
Benefits:
- Free Trial: Allows businesses to try before they buy.
- No Contract: Provides flexibility and ease of switching.
- UK Based Support: Ensures reliable and localized customer support.
- CRM Integration: Enhances business operations through seamless CRM connectivity.
Limitations:
- No Contact Centre Capabilities: May not be suitable for businesses with extensive customer interaction needs.
Best For: Businesses Needing Simple Landline Replacement
PhoneLine+

PhoneLine+ is designed for very small businesses or those needing a straightforward solution to replace traditional landlines, especially in light of the upcoming PSTN switch off. It offers a simple, reliable, and effective way to transition to VoIP without unnecessary complexity.
Benefits:
- Simplicity: Perfect for businesses that need a basic phone system without advanced features.
- Adaptability for PSTN Switch Off: Helps businesses seamlessly transition from traditional landlines.
- UK Based Support: Provides dependable support for local businesses.
Limitations:
- No Advanced Features: Lacks CRM integration and contact center capabilities, making it less suitable for businesses with complex communication needs.
Best For: Small Businesses with Complex Communication Requirements
Horizon Cloud Phone System

Horizon is an excellent choice for small businesses that require a cost-effective yet comprehensive communication system. It offers a wide array of features, including CRM integrations and contact center capabilities, making it suitable for businesses with more complex needs.
Benefits:
- Cost-Effective: Offers advanced features at a competitive price.
- 24/7 Support: Ensures round-the-clock assistance.
- CRM Integration: Enhances business operations through seamless CRM connectivity.
- Contact Centre Capabilities: Supports businesses with extensive customer interaction needs.
Limitations:
- Contract Required: Unlike some other options, Horizon requires a commitment.
Best For: Businesses Needing Integrated Collaboration and Business Calling
Microsoft Teams Phone

Microsoft Teams Phone integrates seamlessly into the Microsoft Teams environment, making it ideal for businesses that need to combine video calling, collaboration, and business calling into one platform. This system leverages the robust Teams ecosystem to offer a unified communication solution.
Benefits:
- Unified Communication Platform: Combines calling, video meetings, and collaboration tools.
- Microsoft Support: Backed by Microsoft’s extensive support network.
- Integration with Microsoft Suite: Provides seamless integration with other Microsoft Office tools.
Limitations:
- No Free Trial: Businesses need to commit without a trial period.
- Contract Required: Requires a contractual commitment.
Conclusion
Selecting the right VoIP phone system depends on the specific needs and size of your business. Each of these products offers distinct advantages, ensuring that you can find a solution perfectly aligned with your business needs. By considering the unique requirements and goals of your business, you can select a VoIP system that enhances communication, boosts productivity, and prepares your business for the future.
What's right for me?
Frequently Asked Questions
FAQ's and things to think about
What makes a great business phone system for UK businesses?
What is VoIP, and how does it differ from traditional phone systems?
Why should my business consider upgrading to a VoIP system?
How does the PSTN switch off impact my business?
Can VoIP systems improve customer experience?
How can VoIP systems enhance internal collaboration and employee wellbeing?
What are the key features to look for in a business phone system?
How can a cloud phone system help improve business operations with analytics?
What steps are involved in transitioning from a legacy PBX system to VoIP?
Is VoIP reliable, and how is call quality maintained?
What costs are associated with upgrading to a VoIP system?
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