Side-by-Side Comparison
| Metric | CallTower | Five9 |
|---|---|---|
| Founded | ||
| Founded | 2002 | 2001 older |
| Headquarters | ||
| Headquarters | South Jordan, United States | San Ramon, United States |
| Employees | ||
| Employees | 248 | 3007 larger |
| Industry | ||
| Industry | Messaging, Telecom | Not tracked yet |
| Funding Stage | ||
| Funding Stage | Private Equity | IPO |
| Total Funding | ||
| Total Funding | Not tracked yet | $741.60M |
| Funding Rounds | ||
| Funding Rounds | 2 | 9 |
| Services | ||
| Services | Unified Communications as a Service (UCaaS), Contact Center as a Service (CCaaS), Collaboration and Integration Solutions, AI-Driven Communication Technologies, 24/7/365 Support | Contact Center Software, AI and Automation Solutions, Workforce Engagement Management, Digital Customer Engagement, CX Transformation Services, Professional Services and Training |
| Target Customers | ||
| Target Customers | Enterprises seeking advanced communication solutions, Organizations transitioning from legacy telephony systems, Businesses requiring seamless integration with Microsoft and Cisco platforms, Companies in need of global voice and network connectivity | Enterprises, Mid-Market Businesses, Small Businesses, Healthcare Industry, Financial Services, Retail Sector, Higher Education, Government, Sales & Telemarketing, Customer Services, Outsourcing, Collections |
| Taxonomy | ||
| Taxonomy | Cloud Communication, Collaboration Solutions, Enterprise-Class Communication, Microsoft Teams Operator Connect, AI-Driven Contact Center Solutions, CCaaS, CX Optimization, Unified Communications, VoIP Integration, Digital Transformation, Webex By Cisco, Zoom Phone, Contact Center Integration, Workforce Management Consulting, Global Enterprise Voice | AI-Driven Solutions, Cloud Contact Center, Customer Interaction, Hyper-Personalization, Unified Cloud Platform, Contact Center Software, Enterprise Solutions, AI And Human Agents, Cloud Transition, Agent Productivity, Scalable Software, Customer Journey, Digital Transformation, Business Outcomes |
| Website | ||
| Website | calltower.com | five9.com |
About CallTower
CallTower, founded in 2002, has consistently positioned itself as a pioneer in the field of global communication. The company specializes in enterprise-class cloud communication and collaboration solutions, aiming to empower businesses with state-of-the-art technologies. Central to its offerings are...
About Five9
Five9, founded in 2001, has established itself as a significant player in the Customer Experience (CX) industry. Based in the United States, the company offers a robust suite of solutions designed to transform CX through artificial intelligence, as encapsulated in its slogan, "The New CX Starts Here...
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Compiled from the BounceWatch company index. We last looked at CallTower on 17 May 2026, and Five9 on 13 Mar 2026. Where a field is blank here, it means we have not recorded it — not that the answer is zero. How we source and date this.