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Five9 is listed from $119 and has a 6.3 score in our comparison. Reddit users report dropped calls, freezes, sign-in problems and slow support, though those accounts are anecdotal—not a reliability verdict for every deployment. For large contact centers, Genesys Cloud CX and 8x8 are closer fits. Dialpad, Nextiva and 3CX may suit teams with narrower needs. Compare full quotes and plan details: the listed starting prices do not establish feature-for-feature equivalence.
01Why people leave Five9
Recurring call and system issues
Reddit users describe dropped calls, freezes, dead air and sign-in problems. One thread says issues affected connected software, too.
Support that users distrust
One Reddit post describes weekly downtime and support that barely responded; other commenters say troubleshooting did not resolve recurring problems.
Configuration and data concerns
A commenter says Five9 data was difficult to extract, while another reports that issues persisted until a knowledgeable specialist configured the system.
02The alternatives, ranked by fit
- Enterprise contact centers
Genesys Cloud CXGenesys Cloud CXGenesys Cloud CX is the closest fit here for teams leaving Five9 but still needing enterprise contact center breadth. It is listed for enterprise contact center teams, voice and omnichannel operations, and AI agent evaluation. The listed starting price is $75, below Five9’s $119 entry, but that does not confirm equivalent features or total cost.
Trade-off: The source flags annual commitment and unpriced add-ons.
7.0/10from
$75/mo - Unified communications
8x88x88x8 is listed for organizations consolidating business communications and needing contact center tools, including Microsoft Teams organizations evaluating phone options. That makes it a candidate if your replacement needs to cover more than agent calling. The pricing page does not give a starting price, so request a quote before comparing it with Five9’s listed $119 entry.
Trade-off: Pricing is quote-only, so costs are harder to compare.
6.0/10from
Custom - WFM and AI support
AssembledAssembledAssembled suits teams looking beyond telephony toward workforce management and AI-supported service. Its listed use cases include forecasting, scheduling, and automating chat, email or voice. That breadth may fit a contact center rethinking its support operation, not just replacing its phone system. Its listed starting price is $25, but that is not a full-platform quote.
Trade-off: The full-platform price is hard to pin down.
7.0/10from
$25/mo - AI call tools
DialpadDialpadDialpad is listed for support teams needing AI call tools, sales teams wanting coaching and dialing, and teams consolidating voice and collaboration. It may fit if those are the priorities behind your Five9 replacement. The listed starting price is $15, well below Five9’s listed $119, but the published information does not show whether that entry plan covers your contact center requirements.
Trade-off: Check the full quote and support experience.
6.8/10from
$15/mo - Customer channels
NextivaNextivaNextiva is listed for teams consolidating customer channels and businesses wanting AI conversation handling. That makes it worth comparing if your Five9 setup spans more than voice. Its listed starting price is $15, but the source specifically flags costs and support reports for scrutiny. Confirm which features are in the quoted plan before treating the lower entry price as a like-for-like saving.
Trade-off: Costs and support reports deserve scrutiny.
6.3/10from
$15/mo - Flexible deployment
3CX3CX3CX is listed for teams wanting flexible deployment, businesses needing contact center features and organizations preferring per-system licensing. It starts at a listed $25, compared with Five9’s listed $119. It may be worth considering if deployment flexibility and licensing structure matter more than staying with a large contact center suite.
Trade-off: Weigh hosting costs and partner concerns.
5.6/10from
$25/mo
03Side by side
| Tool | Score | From | Free plan | Best for |
|---|---|---|---|---|
 Five9 Five9 (current) | 6.3 | $119/mo | No | Large teams needing multiple channels |
| Genesys Cloud CX Genesys Cloud CX | 7.0 | $75/mo | No | Enterprise contact center teams |
| 8x8 8x8 | 6.0 | Custom | No | Teams consolidating business communications |
| Assembled Assembled | 7.0 | $25/mo | No | Support teams blending people and AI |
| Dialpad Dialpad | 6.8 | $15/mo | No | Teams consolidating voice and collaboration |
| Nextiva Nextiva | 6.3 | $15/mo | No | Teams consolidating customer channels |
| 3CX 3CX | 5.6 | $25/mo | No | Teams wanting flexible deployment |
Questions people ask
Who is Zendesk's biggest competitor?
The published information does not compare Zendesk with competitors or identify one biggest rival. This page compares alternatives to Five9, including Genesys Cloud CX, 8x8 and Dialpad. For a Zendesk comparison, you would need a source that evaluates customer support platforms rather than contact center alternatives.
Which companies use Five9?
The published material does not name companies that use Five9. Reddit posts describe workers’ experiences at their organizations, but do not provide company names. We would not use those accounts to infer a customer list; check Five9’s published customer references for named examples.
Does Five9 use AI?
The published material positions Five9 for contact centers adopting AI self-service, but does not specify which AI features Five9 offers, what plans include them or whether they cost extra. Ask Five9 for current feature and pricing details, then compare them with each alternative’s quoted plan.