8x8 X Series
Enterprise UC and contact centre on one platform with a financially backed five-nines SLA — sold on quote, on contract, and with a poor support record on Trustpilot.
How we test8x8 is the platform to look at if you need unified communications and a full contact centre from one vendor: X2/X4 for UC, X6–X8 adding CCaaS, all under a platform-wide 99.999% SLA, with a strong Microsoft Teams story (Operator Connect in 50 countries) and UK data residency for recordings. It has a proper developer platform (Work Analytics REST API, real-time XCaaS events, CPaaS) but no first-party MCP.
8x8 has removed public pricing from most of its site, so expect quote-led, 12–36-month contracts; third-party UK figures put X2 at about £22 and X4 at £32 per user per month. Trustpilot is 2.8/5 on 624 reviews, with unreachable live support and drawn-out cancellations the recurring complaints.
Pros
- +Single UC + contact-centre platform
- +Strongest SLA in the group — 99.999% financially backed
- +Deep Microsoft Teams / Operator Connect integration
Cons
- −Opaque, quote-only pricing and long contracts
- −2.8/5 Trustpilot on support and cancellation
- −Contact-centre-first roadmap
Pricing
Minimum commitment: £264 — £22/mo × 1 seat × 12 months. The least you can spend before walking away; excludes numbers, minutes and add-ons.
X2 (third-party figure)
£22/mo · annual commitment
Month-to-month: not published
- ✓Per user, annual — verify with 8x8
X4 (third-party figure)
£32/mo · annual commitment
Month-to-month: not published
- ✓Unlimited calling to 47 countries
Specifications
| Rating | 3.4 |
| Month-to-month (entry plan) | Not published |
| Annual commit, per month | £22/mo |
| Minimum commitment* | £264 |
| Deployment | Cloud PBX |
| Sales model | Direct |
| Public API | ✓ |
| MCP server | No |
| Emergency 911/999/112 | ✓ |
| Trustpilot (reviews) | 2.8 (624) |
| Integrations | Microsoft Teams, Salesforce, HubSpot +5 |
| Commitment for annual rate (months) | 12 |
*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