8x8 vs. Five9
Five9 stalls, 8x8 scales.
In the rapidly evolving landscape of business communications, scalability, reliability, and comprehensive integrations are paramount. 8x8 stands out by delivering a unified platform that seamlessly integrates UCaaS, CCaaS, and CPaaS, backed by a financially guaranteed 99.999% uptime SLA.
- A unified UCaaS, CCaaS, and CPaaS platform.
- Security, global scalability, and long-term reliability.
- Simplified management and unified interaction data across your organization.
- Switch from Five9 and get up to 12 months free.*
See offer details. Exclusions apply.
How Five9 doesn’t compare to 8x8.
 |  | |
| Third-party Validation | ||
| Leader in the Gartner®️ UCaaS Magic Quadrant™ | 13 years in a row | N/A |
| Recognized in the Gartner®️ CCaaS Magic Quadrant™ for a first-party Contact Center | 10 years in a row | 7 years as leader |
| Recognized in the Forrester UCaaS & CCaaS Wave™ reports | Strong performer in 2025 UCaaS and CCaaS reports | Recognized in the CCaaS report only. |
| Global Public Sector CCaaS Solutions Customer Value Leadership Award - Frost & Sullivan®️ | 2024 | N/A |
| Admin Accolades | 2024 NY Design Awards - Silver | N/A |
| Microsoft Teams® Integrations | ||
| Teams – Certified Contact Center | Solution Certified for Microsoft Teams | Yes |
| Teams – Certified for Teams Phone | 8x8 Operator Connect for Microsoft Teams | Does not offer UCaaS directly. |
| Global Service Availability | ||
| Full PSTN Replacement | 55+ Countries | Relies on partners that don’t measure up to 8x8. |
| Unified Platform | Single Platform for UC & CC and CPaaS | Does not offer UCaaS directly. |
| Unified Service Level Agreement | Unified, financially backed, platform-wide 99.999% uptime | Offers SLA for 99.999% uptime however financial backing may be weak. |
One platform. Every communication.
Unlike Five9, which often requires multiple tools and third-party apps to cover business communications, 8x8 delivers a truly unified platform that combines voice, video, chat, contact center, and APIs in one seamless experience. This means less complexity, better data and insights, and more value from a single provider. Whether you're managing internal collaboration or delivering world-class customer service, 8x8 keeps everything—and everyone—connected.
8x8 does what Five9 can’t. Everywhere it counts.
Five nines. Not Five9.
8x8 guarantees 99.999% uptime across unified communications and contact center. Unlike Five9’s vague SLA, you get one consistent promise—less risk, more peace of mind.
Right sized for your team.
8x8 makes it easy for lean IT teams to deploy, manage, and scale communications.
Global reach without hassle.
Connect your teams in 55+ countries with 8x8’s native PSTN coverage—more than Five9 even through their partner network. One provider, global coverage.
Deeper Microsoft Teams integrations.
Only 8x8 delivers certified Teams solutions for both calling and contact center. No workarounds, no compromises— just a native, seamless experience.
Recommended by leading industry experts.
These organizations didn’t settle for Five9. Why should you?
First United evaluated multiple vendors, including RingCentral, Zoom, and Nextiva. “We did an evaluation of four or five platforms, and 8x8 came out on top." The decision ultimately came down to flexibility, a Microsoft Teams-certified contact center solution, and outstanding support from 8x8’s advisors.”
Cape Air evaluated a number of solutions, including Cisco, Five9, RingCentral, Evolve, and 8x8. “What set 8x8 apart was the superior contact center, CRM integration, robust SLA, and easy phone experience—all on the same platform.”
Acer ditched its Avaya PBX system for a more modern, transparent CX platform “8x8 gives us transparency, which helps us deliver a great customer experience.”
