VoIPstudio
UK-based, contract-free cloud PBX with the broadest feature set at its price point — and one of the very few phone platforms with a real REST API, webhooks and a native MCP server.
How we testVoIPstudio is a UK cloud phone system aimed at SMEs and small contact centres, sold monthly with no minimum term, no minimum seats and no setup fee. The feature list reads like a platform three times the price — call queues, IVR, recording, a visual call-flow designer, SMS, CRM integrations (Salesforce, HubSpot, Zoho, Dynamics 365, Zendesk, simPRO), Zapier, and a CX add-on with AI transcripts and summaries — but the differentiator for a technical buyer is the automation surface: a documented public REST API, webhooks for every call state, and, since June 2026, a native MCP server (call records, live calls, recordings, voicemails) that plugs straight into Claude or any other MCP client. Almost no competitor in this comparison offers that.
It backs the service with a financially credited 99.999% SLA and holds a 4.6/5 on Trustpilot from 1,673 reviews. We run VoIPstudio in production ourselves — the cost/feature balance and the MCP/API depth are our own assessment, not just the spec sheet.
Pros
- +Lowest entry price in the comparison with no contract, no seat minimum and no setup fee
- +Public REST API + webhooks + native MCP server — the deepest automation story of any platform here
- +Financially backed 99.999% SLA; 4.6/5 Trustpilot (1,673 reviews)
Cons
- −GBP list prices sit behind a currency selector rather than being published outright
- −MCP tools are read-only so far (no call control)
- −Trustpilot 1–2★ themes: KYC/document-verification delays after sign-up; communication during an outage
Pricing
Minimum commitment: $6 — $6/mo × 1 seat × 1 month — no commitment. The least you can spend before walking away; excludes numbers, minutes and add-ons.
Pay as You Go
$6/mo · no commitment
Same price on any term
- ✓Per user — unlimited inbound, outbound from $0.015/min
2K Bundle
$20/mo · no commitment
Same price on any term
- ✓Per user — 2,000 outbound min to 45+ countries, number included
CX add-on
$14/mo · annual commitment
Month-to-month: not published
- ✓Per user — AI transcripts/summaries, call-flow designer
Specifications
| Rating | 4.5 |
| Month-to-month (entry plan) | $6/mo |
| Annual commit, per month | Same price |
| Monthly premium | 0% |
| Minimum commitment* | $6 |
| Min seats | 1 |
| Deployment | Cloud PBX |
| Sales model | Direct |
| Public API | ✓ |
| MCP server | ✓ |
| Emergency 911/999/112 | ✓ |
| Trustpilot (reviews) | 4.6 (1,673) |
| Integrations | Salesforce, HubSpot, Zoho +5 |
| Commitment for annual rate (months) | 0 |
*How we calculate minimum commitment. Headline per-user prices hide the real cost of trying a platform. Total cost of ownership is licence × seats × term, plus usage, add-ons, setup fees and any early-exit charges. Our "minimum commitment" figure is the floor of that: the entry plan's committed rate × the minimum seats the vendor will sell × the months you must commit to (one month at the month-to-month rate where there is no commitment; the licence price where it is sold per year). It deliberately excludes usage, add-ons and prerequisite licences, so your real first bill will be higher — but never lower than this. For Teams Phone the excluded prerequisites are the Microsoft 365 and Teams licences.
Researched and drafted with AI assistance; reviewed and approved by Tim Meredith. How we use AI