8x8 is unified UCaaS+CCaaS over softphone. Kelir is UCaaS over cellular.
8x8's strength is the integrated UCaaS + contact-center stack on a single platform. Comparable UCaaS feature surface to Kelir; different delivery (softphone vs cellular eSIM) and different scale focus (mid-market+ for 8x8; SMB / lower-mid-market for Kelir).
8x8 has built its position around the unified UCaaS + Contact Center as a Service (CCaaS) stack — one platform for voice, video, team messaging, and contact-center workflows like real-time supervision and skill-based queuing. UCaaS feature depth is comparable to Kelir for the routing primitives (auto-attendant, IVR, hunt groups, departments, recording, analytics). 8x8's softphone delivery introduces the standard reliability and 2FA SMS issues; Kelir's cellular eSIM delivery solves both. Choose 8x8 if you need integrated contact-center supervision; choose Kelir if you want UCaaS-tier routing on cellular delivery for a 2–50 person team without the CCaaS complexity.
How they compare.
| Compared | 8x8 | Kelir |
|---|---|---|
| Delivery model | ||
| Voice transport | Softphone (Wi-Fi / mobile data) | Cellular VoLTE (PSTN-native) |
| Where the call rings | 8x8 Work app | Native dialer |
| App must be open to ring | Yes (app session) | No — eSIM line |
| Works without internet | ||
| Real cellular number for 2FA | Limited (virtual) | Yes |
| UCaaS routing | ||
| Auto-attendant | ||
| Multi-level IVR | 2–4 levels by tier | |
| Hunt groups | ||
| Departments | ||
| Call queuing | ||
| Skill-based routing | Team Pro | |
| CCaaS / Contact center | ||
| Real-time agent supervision | ||
| Workforce management | ||
| Outbound predictive dialer | ||
| SLA dashboards | ||
| Quality monitoring + scoring | Recording for QA only | |
| Voicemail & analytics | ||
| Voicemail transcripts | Every plan | |
| Call recording | ||
| Configurable retention | Higher tier | 30d–7y on Pro |
| CRM integrations | Team Pro | |
| Compliance | ||
| SOC 2 Type II | Roadmap | |
| HIPAA BAA | Roadmap | |
| US data residency | ||
| E911 enabled | ||
8x8 information sourced from www.8x8.com on 2026-05-05. Plans and prices change; check the source for the current state.
- Unified UCaaS + CCaaS on one platform — single vendor for voice, video, contact-center.
- Real-time contact-center supervision dashboards, agent state tracking, sophisticated skill-based queuing.
- Mid-market scale (50–500 seats) with hybrid contact-center + business communications use cases.
- Built-in video and team-messaging — comparable to RingCentral's full-stack approach.
- Long-running mid-market customer base — platform maturity and integration depth.
- Real cellular delivery — UCaaS routing on a cellular eSIM line, not a softphone.
- Mobile-first / field-based teams — calls ring on the native dialer over VoLTE.
- 2FA SMS deliverability — every line is a real US cellular number.
- SMB / lower-mid-market simplicity — UCaaS depth without enterprise CCaaS complexity.
- Lower per-seat cost at the entry tier ($24.99/mo Solo, $29.99/seat Team Starter).
- Faster time-to-deploy — no IT-led rollout for a 5–25 person team.
Side-by-side, USD.
- X2 (UCaaS)Voice + video + messaging, basic IVR~$28/seatper month, USD
- X4 (UCaaS+)Adds advanced analytics, supervisor analytics~$57/seatper month, USD
- X6 / X8 (CCaaS)Full contact-center capabilitiesQuote-basedUSD
- SoloSingle-user UCaaS feature surface$24.99per month, USD
- Team StarterMulti-user PBX, 2–50 seats$29.99per seat / month
- Team ProCRM, analytics, audit log, retention$39.99per seat / month
Who should pick which?
You need integrated UCaaS + CCaaS — voice, video, team messaging, and contact-center supervision on one platform. Or you're at mid-market scale (50+ seats) with hybrid business-comms + contact-center workflows.
You're a 2–50 person team wanting UCaaS-tier routing depth (auto-attendant, IVR, hunt groups, departments, recording, analytics, CRM) on real cellular eSIM lines. Mobile-first or field-based work where softphone reliability is a real problem. Don't need contact-center supervision.
8x8 is the integrated UCaaS+CCaaS stack — comprehensive, mature, mid-market-and-up. Kelir is UCaaS-on-cellular for SMB / lower-mid-market teams that don't need the contact-center side. If you're running a contact center, 8x8 wins. If you're running a 2–50 person business that needs UCaaS routing without contact-center complexity, Kelir's delivery model and pricing fit better.
Common questions
Yes. X2 covers the basic UCaaS surface (voice, video, messaging, IVR) at ~$28/seat — comparable headline pricing to Kelir Team Starter at $29.99/seat. Feature surfaces overlap significantly. The differences: X2 includes video conferencing built into the platform; Kelir doesn't (Kelir is voice + SMS focused). X2 runs as a softphone; Kelir runs on cellular eSIM. Different value props at similar price points.
Kelir doesn't ship contact-center supervision today and it's not on the near-term roadmap — that's a different product category we deliberately don't compete in. If you're confident you'll need real-time agent supervision, workforce management, predictive dialers, or SLA dashboards within 6–12 months, 8x8 (or Five9, NICE) is the right call from day one. Kelir is for teams that need UCaaS routing without that complexity.
Three ways. (1) Reliability: calls don't drop because the app got suspended or Wi-Fi handed off badly — they ring on the cellular line the same way personal calls do. (2) Mobility: CarPlay routing is automatic, lock-screen rings work, no headset chained to a desk. (3) 2FA SMS: every Kelir line is a real US cellular number that banks and payment platforms accept; 8x8's virtual numbers increasingly get filtered.
If you're consolidating voice + video + messaging on one platform, 8x8 has that built-in (8x8 Meet). Kelir is voice + SMS focused — most Kelir customers run Zoom or Google Meet for video and Slack or Teams for messaging. If single-vendor consolidation is a priority, 8x8's full stack is a real advantage. If you already use Zoom + Slack and just need a phone system, that's not a Kelir downside.
Yes. The migration playbook is the same as for RingCentral: 1–2 weeks for a 5–25 seat team. Number porting follows FCC rules. Routing config rebuild on Kelir's surfaces. CRM integration reconnects via OAuth. See /use-cases/migrating-from-ringcentral for the detailed playbook (the 8x8 version is structurally identical).
No. Kelir is a voice + SMS UCaaS platform — calls, IVR, hunt groups, departments, voicemail, SMS/MMS. Video conferencing is intentionally out of scope; pair Kelir with Zoom, Google Meet, or Microsoft Teams for video. Most of our customers already use one of those for video and don't want their video tied to their phone vendor.