G2 Vendor Directory

Shelf vs. Five9 Intelligent Cloud Contact Center Platform

A side-by-side comparison based on G2 review data.

MetricShelf

by Shelf

Five9 Intelligent Cloud Contact Center Platform

by Five9

Overall rating4.74.1
Review count141625
Ease of use9.58.7
Ease of setup9.68.3
Quality of support9.78.5
Meets requirements9.38.6
NPS83.70370441.225166
Small Business14.9%23.8%
Mid-Market56.7%56.5%
Enterprise28.4%19.7%
Total page views4302,335
Total LLM citations2,48218,550

Shelf

Shelf is the AI Data Layer for trusted enterprise AI and better answers for people. Shelf translates fragmented enterprise knowledge, documents, and files - together with the business context and logic that give them meaning - into a reusable AI data model. By embedding company-specific terminology, relationships, policies, and operating rules, Shelf gives AI agents the context to reason accurately and act with confidence. Enterprise governance and continuous quality assurance keep knowledge current, consistent, and accessible to the right people and agents.

Pros

  • Ease of Use
  • Time-saving
  • Visibility
  • AI Technology
  • AI Features
  • Layout Organization

Five9 Intelligent Cloud Contact Center Platform

Founded in 2001 and headquartered in San Ramon, California, Five9 has evolved into a global CX leader with over 2,500 customers worldwide. As a pioneer in cloud contact center technology, Five9 serves organizations across industries looking to transform customer experiences through intelligent, personalized interactions. With over 1,400 partners globally and 2,700 employees, Five9 combines deep CX expertise with innovative technology to help brands deliver better business outcomes.

Pros

  • Ease of Use
  • Customer Support
  • Helpful
  • Features
  • Efficiency
  • Easy Setup