8x8 sells one platform for the whole company — business phone, meetings, and contact center under a single directory. Five9 sells one thing and has sold it for twenty years. This comparison maps where each is stronger and which fits your operation.
Written by Foretel Solutions, powered by Bridgepointe Technologies · Last updated August 4, 2026
8x8 wins when the contact center is one part of a wider communications decision: it replaces your phone system and your CCaaS in a single contract, agents and back-office staff share one directory and presence, and non-agent employees sit on cheaper UCaaS seats. Five9 wins when the contact center is the decision: its predictive dialer, blended routing, and Salesforce CTI depth are more mature than anything in a bundled suite, and its enterprise track record is longer. Ask whether you are buying a communications platform or a contact center — the answer usually settles it before pricing does.
| 8x8 | Five9 | |
|---|---|---|
| Pricing model | Per agent/mo by tier; UCaaS seats priced separately | Per agent/mo, named or concurrent, five tiers |
| Typical range | ~$85–$170+/agent/mo | ~$149–$229+/agent/mo |
| Business phone system | Included — UCaaS and CCaaS on one platform | Not offered; integrates with your existing UCaaS |
| Outbound dialer | Capable outbound; not a dialer-first platform | Best-in-class predictive/progressive/preview |
| Global voice | Native international calling across many countries | Strong US/Canada footprint; global via carriers |
| Native QM & WEM | Quality management and workforce tooling built in at higher tiers | Native tooling plus long-standing WFM partnerships |
| CRM integrations | Salesforce, Zendesk, ServiceNow, Dynamics | Deep, proven Salesforce CTI plus the same majors |
| AI | Agent assist, self-service, and interaction analytics | Agent Assist, GenAI summaries, IVAs (add-ons) |
| Sweet spot | Consolidating phone and contact center under one vendor | Outbound-heavy and blended operations |
| Watch out for | Contact-center depth trails the pure-play leaders | Premium price if the dialer goes unused |
8x8's pitch is consolidation — its XCaaS positioning puts business phone, meetings, team chat, and the contact center on one platform with one directory. That removes an integration, a vendor relationship, and usually some cost from the non-agent side of the org. Five9 makes the opposite bet: it does not sell you a phone system, it assumes you have one, and it spends its engineering on the queue. Neither is wrong; they are answers to different questions.
8x8 handles outbound competently. Five9's dialer is a different category of tool: predictive, progressive, and preview pacing, list and campaign management, dispositions, and compliance controls refined over two decades of high-volume dialing. For a team that makes calls all day, that difference shows up directly in connect rates and agent idle time — the two numbers that dominate outbound economics.
Comparing $85–$170 against $149–$229 understates the gap for organizations buying both layers. With 8x8, non-agent employees license cheaper UCaaS seats on the same platform, so the blended cost across a 500-person company with 60 agents looks nothing like the agent rate alone. With Five9 you still buy a phone system from someone. Count the whole communications bill, not the contact-center line.
8x8's international voice footprint and unlimited calling plans across many countries are a long-standing strength, and for multinational support operations they simplify both provisioning and the bill. Five9 serves international operations through carrier arrangements rather than a native global calling estate, which is workable but more assembly. If your agents or your customers are spread across countries, price the voice usage, not just the seats.
Teams that outgrow 8x8's contact center usually cite advanced routing, WFM, or AI depth and look at NICE CXone or Genesys Cloud. Teams that leave Five9 usually cite cost or digital-channel breadth and look at Talkdesk or Genesys. If a bundled platform is the appeal but Microsoft is your standard rather than 8x8, the Teams contact center options are the closer comparison.
8x8 lists roughly $85–$170 per agent per month for contact-center seats: voice with basic digital near the bottom, fuller omnichannel with quality management in the middle, and the workforce- and AI-heavy tier at the top. Five9 runs roughly $149–$229 across five tiers with telephony metered on top. 8x8's floor sits well below Five9's, and unlike some value plays it includes quality management rather than selling it back to you.
The comparison changes shape if you are buying business phone service anyway. 8x8 licenses non-agent employees on cheaper UCaaS seats on the same platform, so a company with 60 agents and 440 other staff pays a blended rate the agent price never reveals. Against Five9 you are still paying a separate UCaaS vendor for those 440 people. Build the comparison at the level of the total communications spend, or 8x8's real advantage stays invisible.
Both vendors offer named licensing by default and have made concurrent licensing available for shift-based centers where headcount far exceeds peak-hour agents — worth asking about on either platform if you run follow-the-sun or part-time rosters. Term length and seat count are the reliable discount levers on both, and for 8x8 a combined UCaaS-plus-CCaaS volume commitment is usually the strongest one. Our CCaaS pricing guide sets both against the rest of the market.
Scope drives the timeline more than the brand does. A focused contact-center rollout on either platform commonly goes live in two to six weeks. An 8x8 project that replaces the phone system at the same time — multiple sites, CRM integration, workforce tooling — more typically spans two to four months, because you are migrating the whole company rather than one department. A Five9 build around outbound campaigns and deep Salesforce CTI lands in the same two-to-four-month band for a different reason: dialer strategy, list management, and compliance testing.
Porting runs on carrier timelines through the standard letter-of-authorization process, and it is usually the least flexible item on the calendar. 8x8's broad international carrier footprint helps when numbers move across countries; a US-centric Five9 port is routine but still needs early dates. Keep the old service live until every cutover is verified.
For 8x8, the risk is treating a company-wide communications migration as a contact-center project — count the non-agent users, the sites, and the change management. For Five9, the risk is under-scoping dialer campaigns, compliance rules, and CRM integration. On both, remember that supervisors, administrators, and quality reviewers generally consume licensed seats, so count those roles in the seat total.
If the phone system and the contact center are both up for renewal, 8x8 is competing for a much larger prize and can price accordingly — and the operational simplicity of one directory is real. If the phone system is settled and only the contact center is in play, the bundle advantage evaporates and you are comparing contact-center depth head to head, where Five9 is stronger.
Sustained outbound or blended dialing points hard at Five9; inbound-led service with occasional outreach keeps 8x8 in play. Significant international calling favors 8x8's native global footprint. Deep Salesforce CTI, mature WEM, and hundreds of concurrent agents favor Five9's longer enterprise track record. Weight these against how the operation actually runs, not how it is described in the org chart.
Most operations land split across these factors, and list prices rarely survive contact with a configured build. An independent advisor can price 8x8 as a combined UCaaS-plus-CCaaS deal against Five9 plus whatever phone system you would keep, then put the fully loaded numbers side by side.
At list, yes: roughly $85–$170 per agent against $149–$229. The real gap is usually larger for organizations buying business phone service too, because 8x8 puts non-agent employees on cheaper UCaaS seats on the same platform while Five9 leaves you paying a separate UCaaS vendor for those users.
It handles outbound competently — dialing, callbacks, and campaign basics. What it does not match is Five9's pacing engine, list management, and compliance tooling. Teams where outbound drives revenue, particularly collections and telesales, should treat that as a decisive gap rather than a feature checkbox.
No — the contact center can be licensed on its own. But the shared directory, presence, and single bill are most of why buyers choose 8x8 over a pure-play platform, so a contact-center-only purchase gives up the advantage that makes it competitive against Five9.
8x8 includes quality management and workforce tooling in its higher tiers, which is generous for the price and enough for many mid-market teams. Five9 offers native tooling plus long-standing WFM partnerships and is the safer choice when forecasting and scheduling drive your staffing model. Neither matches a dedicated WEM specialist.
8x8, generally. Its native international calling footprint and multi-country plans simplify both provisioning and billing for multinational support teams. Five9 supports international operations through carrier arrangements, which works but involves more assembly.
If you are consolidating phone and contact center, 8x8 usually wins on total cost and vendor simplicity. If outbound is central, or Salesforce CTI depth is a hard requirement, Five9 is worth the premium. An advisor can model both against your headcount, call mix, and existing phone contract.
An independent advisor can run a full vendor evaluation for your specific channels, headcount, and budget. Free.