Best Telephone Systems for Small Business for 2026

Cloud-based VoIP phone systems have replaced traditional landlines for UK small businesses. With the PSTN switch-off deadline set for January 2027, every business still using analogue lines needs to migrate to a digital alternative.

The best telephone systems for small businesses in 2026 are cloud-based VoIP platforms costing £7–£30 per user per month, combining voice calls, video meetings, and team messaging in a single subscription with no hardware required. On a tight budget? See our cheapest VoIP providers guide for six options under £10/month.

We compared seven leading VoIP providers available to UK small businesses, scoring them on pricing, call features, ease of use, integrations, and customer support. Here are our picks for 2026.

Quick Picks: Best Small Business Phone Systems 2026

bOnline is the best value UK VoIP for small businesses at £7/user/month, while RingCentral offers the most complete platform for growing teams, and Dialpad leads on AI-powered call intelligence (see our guide to AI tools for UK businesses).

1. bOnline – Best Value VoIP for Small UK Businesses

bOnline is the cheapest UK VoIP provider for small businesses, starting at £7 per user per month with unlimited UK calls on higher plans and no setup fees.

bOnline is a UK-based VoIP provider with over 50,000 business customers. It targets sole traders and small teams who want straightforward business calling without enterprise complexity. All plans include a UK landline or mobile number, call routing, and a softphone app.

Best for: Sole traders and teams of 1–10 who want UK calling at the lowest cost. Read our full bOnline review.

2. RingCentral – Best for Growing Teams

RingCentral is the most feature-rich VoIP platform for UK small businesses, with 500+ integrations, AI-powered meeting tools, and plans that scale from a single user to enterprise deployments without switching provider.

RingCentral is a global UCaaS (Unified Communications as a Service) provider used by over 500,000 businesses worldwide. Its UK plans include voice, video, messaging, and fax in a single platform with native integrations for Salesforce, HubSpot, Microsoft 365, and Google Workspace.

Best for: Businesses of 5–50 staff expecting growth who need CRM integrations and video conferencing. Read our full RingCentral review.

3. Dialpad – Best for AI-Powered Call Intelligence

Dialpad is the leading AI-first business phone system, offering real-time call transcription and AI call summaries on every plan, powered by its DialpadGPT engine trained on over 6 billion minutes of conversation data.

Dialpad differentiates itself through AI features built into every plan. Real-time transcription and post-call summaries run on every call – no add-ons required. Live coaching and sentiment tracking sit in Dialpad’s contact-centre products. For teams wanting dedicated meeting note-taking across platforms beyond calls, see our best AI meeting tools guide covering Otter.ai, Fireflies, and Fathom.

Best for: Sales teams and customer service departments that need call transcription, coaching, and analytics. Read our full Dialpad review.

4. GoTo Connect – Best for International Calling

GoTo Connect includes free international calling to landlines in 50+ countries on all plans, making it a strong choice for UK small businesses with overseas clients, suppliers, or remote teams.

GoTo Connect (formerly Jive) is a UCaaS platform from the same company behind GoTo Meeting and GoTo Webinar. Its key differentiator for UK businesses is free international calling to landlines in over 50 countries at no extra cost – something other providers in this guide charge extra for. Mobile calls abroad are billed per minute.

Best for: Import/export businesses, agencies with international clients, and companies with remote teams abroad. Read our full GoTo Connect review.

5. Vonage – Best for Call Centre Training

Vonage offers the most comprehensive call training toolkit of any UK small business phone system, with call whisper, barge, monitor, and recording with analytics available on its higher plans.

Vonage (acquired by Ericsson in 2022 for $6.2 billion) is a well-established VoIP provider with a strong feature set for businesses that need call monitoring and staff training tools. Its Max plan includes whisper (coach agents during live calls), barge (join calls), monitor (listen silently), and call recording with analytics.

Best for: Businesses with 5+ phone-based staff who need call coaching, monitoring, and performance analytics. Read our full Vonage review.

6. NBC Cloud Voice – Best for Simple UK-Only Calling

NBC Cloud Voice is a UK-only VoIP provider offering straightforward business calling from £17.99 per user per month, aimed at small businesses that need reliable phones without the complexity of a full UCaaS platform.

NBC Cloud Voice is a smaller UK provider that focuses on simplicity. Its Enterprise plan (the mid-tier option, despite the name) offers unlimited UK calls, call recording, a mobile app, and basic IVR. It targets businesses that don’t need video conferencing or extensive integrations.

Best for: Micro-businesses and sole traders wanting simple, affordable UK calling. Read our full NBC Cloud Voice review.

7. Google Voice – Best for Google Workspace Teams

Google Voice is the most affordable phone add-on for businesses already using Google Workspace, starting at $10 per user per month on top of an existing Workspace subscription.

Google Voice is a phone system add-on for Google Workspace, not a standalone product. If your business already pays for Workspace (Gmail, Calendar, Drive, Meet), Voice adds business calling at a low incremental cost. It integrates seamlessly with Google Meet, Calendar, and Contacts.

Best for: Small teams of 1–10 already using Google Workspace who need basic calling added to their existing tools. Read our full Google Voice review.

How Much Does a Small Business Phone System Cost?

UK small business phone systems cost between £7 and £30 per user per month, with most businesses spending £12–£20 per user for a plan that includes unlimited UK calls, call recording, and basic integrations.

*Google Voice requires an additional Google Workspace subscription ($7.20+/user/month).

What Affects the Total Cost?

• Number of users – most providers offer volume discounts at 5, 10, 20, and 50+ users
• Contract length – annual billing is cheaper than monthly (RingCentral’s annual rates are roughly 12–28% lower)
• Hardware – desk phones cost £50–£200 per handset. Softphone-only setups need zero hardware spend
• International calls – landline calls to 50+ countries are bundled with GoTo Connect; check international rates with the other providers
• Add-ons – CRM integrations (bOnline £8/user/mo extra), call recording (some providers charge per plan tier), toll-free numbers (£5–£15/month)

How to Choose the Right Phone System

Choose based on your team size, budget, and primary use case: budget-first (bOnline), integrations-first (RingCentral), AI-first (Dialpad), international-first (GoTo Connect), or training-first (Vonage).

How Many Lines Does a Small Business Need?

Cloud VoIP is priced per user rather than per physical line, so a 2, 3 or 4 line set-up comes down to how many people need a number and how many calls you take at once. Count the staff who answer calls, then allow for reception or overflow cover if several calls arrive together. A ring group can share incoming calls between handsets or apps. For larger set-ups, see our multi-line phone systems guide.

Five Questions to Ask Before Switching

1. How many phone users do you have? Providers discount heavily at 5, 10, and 20+ users. Get quotes for your actual headcount.
2. Do you need CRM integration? If yes, RingCentral or Dialpad offer the widest ecosystem. bOnline and NBC charge extra or don’t support it.
3. Do you make international calls? If yes, GoTo Connect saves money with its free landline calling to 50+ countries, though mobile calls abroad are still charged per minute. Check the per-minute international rates with the others.
4. Do you need desk phones? If softphones (computer/mobile apps) are enough, you save £50–£200 per user on hardware. Dialpad is softphone-first by design.
5. Is call recording a legal requirement for your industry? Some FCA-regulated activities require calls to be recorded, so check whether yours do. Check which plan tier includes recording – it’s not always on the cheapest plan.

Switching From a Traditional Phone System

Migrating from a traditional PBX or BT landline to VoIP takes 1–4 weeks, and most providers handle number porting (keeping your existing number) at no extra charge. If you would rather stay with a provider that owns its own UK network, TalkTalk Business is the main alternative to BT for that.

If you’re still on a traditional landline or PBX system, here’s what to expect when switching:

1. Number porting – your existing business number transfers to the new provider. This takes 5–10 working days in the UK. Keep the old line active during the transition.
2. Internet check – each VoIP user needs ~100 Kbps of bandwidth. A typical 50 Mbps connection supports 50+ concurrent calls. Run a speed test before committing.
3. Hardware decision – decide between desk phones (Yealink T46U ~£120, Poly VVX 250 ~£100) or softphone-only (free, uses existing computers and mobiles).
4. Training – most cloud phone systems take 1–2 hours to learn. bOnline offers 1-to-1 onboarding; RingCentral has video training libraries.
5. PSTN deadline – the UK PSTN switch-off is January 2027. If you’re still on analogue lines, you must migrate before then. See our PSTN switch-off guide for details.

Essential VoIP Features for Small Businesses

The core features every UK small business needs from a VoIP system are auto-attendant (IVR), call forwarding to mobiles, voicemail-to-email, call recording, and a softphone app – all included in most mid-tier plans costing £12–£20 per user per month.

For businesses with disabled employees, VoIP platforms also offer built-in accessibility features – including voice control, live captions, and screen reader support. See our guide to hands-free phone systems for disabled employees for specific product recommendations.

If you’re comparing systems specifically for call centres or multi-location businesses, see our guides to call centre phone systems, multi-line phone systems, and VoIP providers.

Need help choosing? Our SIP trunk providers guide covers the technical options, and our office cordless phones guide compares desk hardware for businesses that prefer physical handsets.

Emma Clarke

Technology & Payments Specialist

Emma covers the full range of business technology, including EPOS systems, merchant accounts, telecoms, and web tools. Her experience as a retail systems consultant helps businesses choose the right digital solutions to improve efficiency and sales.

Reviewed by

Sarah Mitchell

B2B Commerce & Finance Reviewer