Business Phone Systems · 2026 reliability ranking
Most Reliable Business Phone Systems (2026)
We ranked 16 business phone systems by real-world reliability over the last 90 days, using 73 status page incidents and our own around-the-clock uptime checks. A cloud phone system carries a small business's inbound calls, voicemail, text messages and call routing, so when it goes down customers hear dead air or fail to connect and the calls usually go to a competitor. Outages also break call queues, auto-attendants and click-to-call integrations with the CRM, and staff often cannot fall back to a personal mobile without losing the business number. Because a missed sales or service call is hard to recover, a provider's outage history is worth checking before you port your numbers to it.
Last updated Nov 1, 2026 · How we score
| # | Vendor | Score | Uptime (90d) |
|---|---|---|---|
| 1 | GrasshopperGrasshopper is a virtual phone system for small businesses and solopreneurs, owned by GoTo.Visit site ↗ | 94.6 | 99.96% |
| 2 | JustCallJustCall is a cloud phone and SMS platform for sales and support teams, with CRM integrations and a sales dialer.Visit site ↗ | 93.4 | 99.96% |
| 3 | CloudTalkCloudTalk is a Bratislava, Slovakia-based cloud calling and call center software for sales and support teams.Visit site ↗ | 89.6 | 99.91% |
| 4 | GoTo ConnectGoTo Connect is the cloud phone system from GoTo (formerly LogMeIn), based in Boston, Massachusetts.Visit site ↗ | 87.9 | 99.87% |
| 5 | Quo (formerly OpenPhone)Quo, formerly OpenPhone, is a cloud business phone app for small teams offering shared numbers, calling and texting.Visit site ↗ | 83.4 | 99.83% |
| 6 | net2phonenet2phone is a cloud business phone and unified communications provider owned by IDT Corporation of Newark, New Jersey.Visit site ↗ | 81.1 | 99.89% |
| 7 | Freshdesk Contact Center (Freshcaller)Freshdesk Contact Center, formerly Freshcaller, is the cloud phone and call center product from Freshworks Inc.Visit site ↗ | 79.9 | 99.75% |
| 8 | DialpadDialpad is a San Ramon, California-based cloud communications company offering business phone, contact center and meetings software.Visit site ↗ | 75.6 | 99.65% |
| 9 | Vonage Business CommunicationsVonage Business Communications is the cloud phone system from Vonage, a communications company owned by Ericsson.Visit site ↗ | 73.0 | 99.72% |
| 10 | NextivaNextiva is a Scottsdale, Arizona-based provider of cloud business phone, contact center and customer communications software.Visit site ↗ | 66.1 | 99.37% |
| 11 | AircallAircall is a Paris-headquartered cloud phone system for sales and support teams that integrates with CRM and help desk tools.Visit site ↗ | 59.6 | 99.30% |
| 12 | Zoom PhoneZoom Phone is the cloud business phone service from Zoom Communications, the San Jose, California-based video communications company.Visit site ↗ | 51.7 | 99.21% |
Business Phone Systems reliability at a glance
- Across the 12 ranked business phone systems, average 90-day uptime is 99.70%. Reliability scores range from 94.6 (Grasshopper) to 51.7 (Zoom Phone).
- Together they published 73 incidents in the last 90 days, 25 of them partial or major outages.
- The typical vendor takes 3h 16m to resolve an incident. Quo (formerly OpenPhone) is fastest, at 1h 12m on average.
- Aircall reported the most incidents (17 in 90 days).
What to check before you choose a business phone system
- Inbound calling and call routing matter most. Check incidents affecting voice separately from messaging and apps.
- Set up automatic forwarding to mobile numbers so calls still reach you if the service goes down.
- Outages are often regional. Check the vendor's incidents for the data centers that serve you.
- If you rely on it for emergency calling, ask how 911/112 calls are handled during an outage.
90-day uptime history
Each bar is one day. Hover a bar for that day's uptime and incidents.
1. Grasshopper
99.96% uptime · 1 incidents · avg resolve 1h 31m2. JustCall
99.96% uptime · 4 incidents · avg resolve 1h 18m3. CloudTalk
99.91% uptime · 2 incidents · avg resolve 3h 33m4. GoTo Connect
99.87% uptime · 3 incidents · avg resolve 1h 46m5. Quo (formerly OpenPhone)
99.83% uptime · 9 incidents · avg resolve 1h 12m6. net2phone
99.89% uptime · 1 incidents · avg resolve 14h 35m7. Freshdesk Contact Center (Freshcaller)
99.75% uptime · 5 incidents · avg resolve 3h 48m8. Dialpad
99.65% uptime · 7 incidents · avg resolve 2h 59m9. Vonage Business Communications
99.72% uptime · 3 incidents · avg resolve 13h 24m10. Nextiva
99.37% uptime · 8 incidents · avg resolve 2h 35m11. Aircall
99.30% uptime · 17 incidents · avg resolve 4h 25m12. Zoom Phone
99.21% uptime · 13 incidents · avg resolve 1d 1h- No incidents
- Degraded
- Partial outage
- Major outage
- No data
Being tracked (not ranked yet)
These vendors join the ranking once we have enough evidence: at least 14 days of data, and for vendors with a quiet status page (silent for a year, or for 90 days while their competitors report several incidents), 30 days of our own independent monitoring.
- Google Voice · quiet status page, awaiting our own monitoring
- 8x8
- Ooma Office · no public status page
- RingCentral
Recent Business Phone Systems incidents
Increased Platform Errorsofficial update ↗
Affected: Inbound Calls, Conversation Center, Aircall Workspace (Web), Outbound Calls, Aircall Workspace (Desktop), Analytics +5 more
NextivaONE and NextOS Platform Login Issuesofficial update ↗
Affected: Nextiva Call Center, NextivaONE, NextOS Platform
Intermittent Audio Quality and Calling Issues.
Affected: Nextiva Call Center, NextOS Platform
Failures in incoming and outgoing calls
Affected: JustCall Dashboard, JustCall Live Dashboard
Inbound Call Completion Issues — Select Canadian Regions
Affected: Inbound Call Completion
GoTo Connect - Inbound calls failing for customers in Brazil
Affected: PSTN Calls - Inbound
Affected: Outbound Calling, SMS Service, JustCall Dashboard, Contact sync with CRMs, help desks and other integrations, Inbound Calling, MMS Service +1 more
Head-to-head comparisons
- Grasshopper vs JustCall reliability
- Grasshopper vs CloudTalk reliability
- Grasshopper vs GoTo Connect reliability
- Grasshopper vs Quo (formerly OpenPhone) reliability
- JustCall vs CloudTalk reliability
- JustCall vs GoTo Connect reliability
- JustCall vs Quo (formerly OpenPhone) reliability
- CloudTalk vs GoTo Connect reliability
- CloudTalk vs Quo (formerly OpenPhone) reliability
- GoTo Connect vs Quo (formerly OpenPhone) reliability
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Frequently asked questions
What is the most reliable business phone system?
Based on the last 90 days of data, Grasshopper is the most reliable business phone system we track, with a reliability score of 94.6/100 and 99.96% uptime.
How do you measure business phone system reliability?
We poll each vendor's public status page every few minutes, record every incident, and run our own uptime checks against each vendor's login and customer-facing pages. Uptime (40%), incident frequency (20%), average time to resolve (20%) and transparency (20%) combine into one score out of 100.
How often are these rankings updated?
Continuously. Status pages and uptime checks run every five minutes and scores are recalculated several times an hour.
Can vendors pay to rank higher?
No. Sponsored placements are clearly labelled, shown separately from the rankings and never change a vendor's score.