Choosing a phone system shouldn’t take weeks of research. You need something reliable, affordable, and easy for your team to use. But with dozens of VoIP platforms competing for your attention, the decision gets complicated fast.
We’ve deployed phone systems for hundreds of businesses — from 5-person offices to 200-seat contact centres. Based on real-world experience, here are the best VoIP phone systems for small businesses in 2026, ranked by value.
Our Top 5
| Rank | Platform | Best For | Starting Price |
|---|---|---|---|
| 1 | 3CX | Best overall value | Free (up to 10 users) |
| 2 | Yeastar P-Series | Easiest to manage | ~$7/user/month |
| 3 | Microsoft Teams Phone | Teams-first businesses | ~£6/user/month add-on |
| 4 | RingCentral | All-in-one UCaaS | ~$20/user/month |
| 5 | Zoom Phone | Zoom-heavy organisations | ~$10/user/month |
1. 3CX — Best Overall Value
Why it tops the list: 3CX is the only business phone system that offers a genuinely free tier and per-system licensing instead of per-user pricing. For a small business watching costs, this is a game changer.
Price: Free for up to 10 users. Paid plans start at €175/year for the entire system — not per user. A 30-user business pays the same €175/year as a 16-user business.
Key features:
- Voice, video (250 participants), chat, SMS
- Call recording on all plans
- IVR / auto-attendant on all plans
- Call queues on all plans
- CRM integrations (Salesforce, HubSpot, Zoho, Microsoft 365)
- Mobile and desktop apps (Windows, Mac, Linux, web)
- Microsoft Teams integration via direct routing
- Choose your own SIP trunk provider for call costs
Pros:
- Dramatically cheaper than per-user competitors
- Full contact centre features included (not extra)
- Self-host or cloud — your choice
- Huge partner ecosystem
Cons:
- Steeper learning curve for setup (use a partner)
- Interface is functional but not as polished as Yeastar
- No free tier above 10 users
Best for: Cost-conscious small businesses that want enterprise features. Especially strong for businesses with a managed IT partner handling setup and maintenance.
2. Yeastar P-Series — Easiest to Manage
Why it’s great: Yeastar is what you choose when you want a phone system that just works without needing an IT degree. The Linkus UC client is slick, the web admin is intuitive, and the drag-and-drop call flow designer means anyone can set up an IVR.
Price: Starting at ~$7-13/user/month for the Standard Cloud plan. More expensive than 3CX at scale, but includes more out-of-the-box.
Key features:
- Linkus UC client (modern, polished, cross-platform)
- Drag-and-drop call flow designer
- Operator panel for receptionists
- CRM integrations
- Microsoft Teams integration
- Hotel PMS module (hospitality businesses)
- Hot standby / high availability
- White-label option for resellers
Pros:
- Best user experience of any business PBX
- Easier to self-manage than 3CX
- Purpose-built hospitality features
- Excellent direct vendor support
Cons:
- Per-user pricing adds up for larger teams
- Smaller community than 3CX
- No free tier
Best for: Small businesses that want simplicity and don’t have dedicated IT. Hotels and hospitality. Resellers who want to white-label.
3. Microsoft Teams Phone — Best for Teams-First Businesses
Why it’s here: If your entire company already lives in Microsoft Teams, adding phone calling to Teams is the path of least resistance. No new app to install, no new interface to learn.
Price: Teams Phone licence is £6/user/month (add-on to your existing Microsoft 365 plan, included free with E5). You still need a way to connect to the phone network — either Microsoft Calling Plans (£6-10/user/month) or direct routing via a SIP trunk.
Key features:
- Calling directly from the Teams interface
- Integrates with Outlook, SharePoint, OneDrive
- Auto-attendant and call queues (basic)
- Call recording
- Voicemail with transcription
Pros:
- Your team already knows Teams
- No additional app to manage
- Deep Microsoft 365 integration
Cons:
- Expensive when you add up all the licences (Phone + Calling Plan = £12-16/user/month)
- Limited call centre features without add-ons
- Basic reporting compared to 3CX/Yeastar
- Locked into Microsoft’s ecosystem
Pro tip: Use 3CX or Yeastar with Teams via direct routing instead of Microsoft Calling Plans. You get Teams as the front-end but with better features and cheaper calling. Learn how.
4. RingCentral — Best All-in-One UCaaS
Why it’s here: RingCentral is the market leader in UCaaS (Unified Communications as a Service). It’s a fully managed, cloud-only platform that bundles phone, video, messaging, fax, and contact centre into one subscription.
Price: Starting at ~$20/user/month (Core plan). Advanced features require higher tiers ($25-35/user/month).
Key features:
- Voice, video (200 participants), messaging, fax
- AI meeting summaries and transcription
- CRM integrations
- 300+ app integrations
- Global presence (data centres worldwide)
- Contact centre (separate product)
Pros:
- Fully managed — zero IT involvement
- Huge integration ecosystem
- Reliable, enterprise-grade platform
- Global coverage
Cons:
- Most expensive option on this list
- Per-user pricing scales poorly for small businesses
- Advanced features locked behind premium tiers
- Annual contract required for best pricing
- Less control (no self-hosting, no SIP trunk choice)
Best for: Businesses with budget to spare that want someone else to handle everything. Larger organisations with global teams.
5. Zoom Phone — Best for Zoom-Heavy Organisations
Why it’s here: If your business already pays for Zoom Workplace and uses Zoom for meetings daily, adding Zoom Phone is straightforward and competitively priced.
Price: Starting at ~$10/user/month (metered) or $15/user/month (unlimited domestic calling).
Key features:
- Calling from the Zoom app
- Voicemail transcription
- Call recording
- IVR / auto-attendant
- Call queues
- Integration with Zoom Meetings
Pros:
- Competitive pricing
- Familiar Zoom interface
- Good call quality (Zoom’s network is well-established)
- Simple admin portal
Cons:
- Less mature than 3CX/RingCentral for telephony features
- Limited contact centre capabilities
- Fewer CRM integrations
- No self-hosting option
Best for: Businesses already on Zoom Workplace that want to consolidate phone and meetings in one platform.
Comparison Table
| Feature | 3CX | Yeastar | Teams Phone | RingCentral | Zoom Phone |
|---|---|---|---|---|---|
| Price (20 users/yr) | Free-€295 | ~$1,680-3,120 | ~£2,880-3,840 | ~$4,800-8,400 | ~$2,400-3,600 |
| Free tier | Yes (10 users) | No | No | No | No |
| Call recording | All plans | All plans | Yes | Higher plans | Yes |
| Call queues | All plans | All plans | Basic | Higher plans | Yes |
| CRM integrations | Many | Many | Limited | 300+ | Some |
| Teams integration | Yes | Yes | Native | Yes | Yes |
| Self-hosting | Yes | Yes | No | No | No |
| SIP trunk choice | Yes | Yes | Via direct routing | No | Limited |
| Mobile app | Yes | Yes | Yes | Yes | Yes |
| Video | 250 users | Built-in | 300 users | 200 users | 1,000 users |
| Contact centre | Included | Included | Add-on | Separate product | Add-on |
How to Choose
Under 10 users? Start with 3CX Free. Zero risk, zero cost. Upgrade if you need more features.
10-50 users, budget-conscious? 3CX paid plans. €175-295/year for the whole system is unbeatable.
Want easiest setup, willing to pay per-user? Yeastar P-Series Cloud. The Linkus client and admin interface are the most user-friendly.
Already on Microsoft 365? Use Teams Phone with 3CX direct routing for the best of both worlds.
Enterprise with big budget? RingCentral or Microsoft E5 with Teams Phone.
Need Help Choosing?
ITelecoms deploys and manages both 3CX and Yeastar phone systems, plus SIP trunking and Microsoft Teams direct routing.
We’ll assess your requirements — team size, call volumes, existing infrastructure, budget — and recommend the right platform. No hard sell. If RingCentral or Zoom is genuinely the best fit for you, we’ll say so.
Contact us for a free consultation
Looking for advanced call reporting on your existing 3CX system? Check out ITelecoms Advanced 3CX Reports — live