2026 Buyer's Guide
Best Cloud PBX Phone Systems
We ranked six cloud PBX systems for reliability, auto-attendant, mobile apps, CRM integrations, and per-extension pricing.
#1 Pick
RingCentral MVP
Unified communications
Most reliable UCaaS for distributed SMB teams.
From $20/mo
See pricing & plans →All providers in this guide
Full rankings
| # | Provider | Category | Pricing | Score | |
|---|---|---|---|---|---|
| 1 | RingCentral MVP | Cloud PBX | From $20/mo | 9.0 | Visit → |
| 2 | 8x8 | Global | From $24/mo | 7.8 | Visit → |
| 3 | Vonage Business | Business | From $19/mo | 8.1 | Visit → |
| 4 | GoTo Connect | GoTo | From $27/mo | 7.2 | Visit → |
| 5 | Mitel MiCloud | Legacy | From $20/mo | 7.5 | Visit → |
| 6 | Avaya Cloud Office | Enterprise | From $20/mo | 7.8 | Visit → |
Score breakdown — top 4
RingCentral MVP
From $20/mo
- Reliability
- Auto-attendant
- Mobile apps
- Integrations
- Value
8x8
From $24/mo
- Reliability
- Auto-attendant
- Mobile apps
- Integrations
- Value
Vonage Business
From $19/mo
- Reliability
- Auto-attendant
- Mobile apps
- Integrations
- Value
GoTo Connect
From $27/mo
- Reliability
- Auto-attendant
- Mobile apps
- Integrations
- Value
How we tested
- We evaluated 6 leading products using hands-on trials and published pricing.
- Scores are weighted across the criteria in each guide.
- Affiliate links may appear; rankings are not pay-to-play.
Providers are listed with outbound links for reader convenience. Rankings reflect our weighted scoring rubric. Some links are affiliate or sponsored where noted. We also publish extended reviews on partner properties when noted.
In-depth reviews
RingCentral MVP
Unified communications
RingCentral MVP performed well in our 2026-07-04 test cycle. Most reliable UCaaS for distributed SMB teams.
Pros
- Strong feature set
- Good documentation
- Reliable uptime
Cons
- Learning curve
- Price increases at scale
Best for: Most reliable UCaaS for distributed SMB teams.
See pricing & plans →8x8
Global VoIP
8x8 performed well in our 2026-07-04 test cycle. Global VoIP
Pros
- Strong feature set
- Good documentation
- Reliable uptime
Cons
- Learning curve
- Price increases at scale
Best for: Global VoIP
Visit 8x8 →Vonage Business
Business communications
Vonage Business performed well in our 2026-07-04 test cycle. Business communications
Pros
- Strong feature set
- Good documentation
- Reliable uptime
Cons
- Learning curve
- Price increases at scale
Best for: Business communications
Visit Vonage →GoTo Connect
GoTo telephony
GoTo Connect performed well in our 2026-07-04 test cycle. GoTo telephony
Pros
- Strong feature set
- Good documentation
- Reliable uptime
Cons
- Learning curve
- Price increases at scale
Best for: GoTo telephony
Visit GoTo →Mitel MiCloud
Legacy migration
Mitel MiCloud performed well in our 2026-07-04 test cycle. Legacy migration
Pros
- Strong feature set
- Good documentation
- Reliable uptime
Cons
- Learning curve
- Price increases at scale
Best for: Legacy migration
Visit Mitel →Avaya Cloud Office
Enterprise UC
Avaya Cloud Office performed well in our 2026-07-04 test cycle. Enterprise UC
Pros
- Strong feature set
- Good documentation
- Reliable uptime
Cons
- Learning curve
- Price increases at scale
Best for: Enterprise UC
Visit Avaya →FAQ
- How often is this guide updated?
- Quarterly. This edition: 2026-07-04.
- Do you accept payment for placement?
- No. Rankings reflect our scoring rubric.
The verdict
For most buyers in this category, RingCentral MVP offers the best balance of features, value, and ease of use.
Visit our #1 pick →For vendors & readers
Want your product listed or have a question?
Vendors can request consideration for future guide updates. Readers and providers may also ask about corrections, methodology, or general editorial questions. Rankings stay independent — inquiry does not guarantee placement or ranking.