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.
8x8 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 |
| Pricing and plans | |
|---|---|
| Month-to-month (entry plan) | Not published |
| Annual commit, per month | £22/mo |
| Minimum commitment* | £264 |
| Commitment for annual rate (months) | 12 |
| Features | |
| Deployment | Cloud PBX |
| Sales model | Direct |
| Integrations and developers | |
| Public API | ✓ |
| MCP server | No |
| Integrations | Microsoft Teams, Salesforce, HubSpot +5 |
| Ownership and trust | |
| Trustpilot (reviews) | 2.8 (624) |
| Support | |
| Emergency 911/999/112 | ✓ |
*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 Dariia Panchenko. How we use AI
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