Best Business Phone for Enterprise 2026
Enterprise organizations demand business phone systems with advanced security, compliance certifications, and the ability to scale across thousands of users. Large companies need platforms that integrate with existing identity providers, support complex organizational structures, and provide dedicated support with SLA guarantees. Enterprise solutions must meet strict audit requirements and offer granular control over permissions and policies.
Enterprise-grade solutions must provide comprehensive security features including SSO/SAML integration, role-based access controls, and audit logging for compliance. Look for platforms with SOC 2 Type II and ISO 27001 certifications, dedicated customer success managers, and SLA guarantees of 99.9% or better. The solution should support multi-region deployments, offer extensive API access for custom integrations, and provide volume discounts that make per-user costs reasonable at scale.
For enterprises, 8x8 leads with the most comprehensive solution at $44/user/month: calling in 48 countries, full contact center, and enterprise-grade features. Nextiva at $32.95/month suits enterprises prioritizing reliability and support quality. Dialpad's Enterprise tier excels for AI-powered intelligence and modern UX. Vonage Enterprise works for custom development with CPaaS capabilities. Ooma Office maxes out at 50 users and lacks true enterprise features like SSO, compliance certifications, and global scalability.
Our Rankings
8x8
8x8 wins for enterprises needing comprehensive global communications. The X Series with Contact Center at $44/user/month is unmatched: unlimited calling in 48 countries (more than any competitor), omnichannel contact center (voice, email, chat, SMS, social), AI-powered analytics, workforce management, speech analytics, and video meetings for 500 participants. The Enterprise tier adds custom SLAs, advanced security (SSO, SAML, HIPAA, PCI-DSS, SOC 2), volume discounts for 100+ users, and multi-site management. Ideal for global enterprises with international teams and contact center requirements, though customers report billing complexity and customer service challenges.
- Free tier available
- Most comprehensive feature set
- Strong customer support
- Higher learning curve than alternatives
Nextiva
Nextiva ranks second for enterprises prioritizing reliability and support quality. The Enterprise plan at $32.95/user/month includes unlimited call recording, advanced analytics, SSO, dedicated account manager, priority support, supervisor monitoring, multi-site management, and API access. The Ultimate tier (custom pricing) adds full contact center capabilities with omnichannel routing, workforce management, quality management, speech analytics, and custom SLAs. With 99.999% uptime SLA and the 'Amazing Service' promise, Nextiva suits enterprises wanting dependable platforms with strong customer support. Best for 100-1,000 user deployments prioritizing stability over bleeding-edge features.
- Free tier available
- Excellent balance of features and price
- Intuitive user interface
- Some advanced features require higher tiers
Dialpad
Dialpad places third for enterprises leveraging AI-powered intelligence. The Enterprise tier (custom pricing) provides advanced AI features competitors lack: real-time sentiment analysis, automated coaching suggestions, action item detection, and AI-powered analytics. Includes video meetings for 150 participants, contact center add-on (Dialpad Support starting at $75/agent/month), SSO, SAML, HIPAA/PCI compliance, 99.999% uptime SLA, and custom integrations. The platform excels for enterprises with Google/Microsoft ecosystems and development teams that can leverage APIs. However, contact center capabilities cost extra ($75+/agent/month) and smaller global calling coverage than 8x8.
- Free tier available
- Strong integration ecosystem
- Reliable performance
- Mid-tier pricing may be steep for small teams
Vonage Business
Vonage Business ranks fourth for enterprises needing CPaaS customization. The Enterprise tier (custom pricing) combines UCaaS with Communications Platform as a Service (CPaaS) capabilities, enabling custom application development with embedded voice, video, and messaging. Includes contact center with omnichannel routing, workforce management, quality management, speech analytics, HIPAA/PCI-DSS/SOC 2 compliance, dedicated account team, and global deployment support. Best for enterprises with development resources wanting to build custom communication experiences. However, customers report mixed customer service experiences, complex billing, and CPaaS usage fees add significant costs beyond base UCaaS pricing.
- Free tier available
- Specialized capabilities for specific use cases
- May lack some features of top competitors
- Smaller community compared to leaders
Ooma Office
Ooma Office finishes fifth as it's designed for small businesses (1-50 users), not enterprises. The top Ooma Office Pro Plus tier at $29.95/user/month includes call queuing, Salesforce/Microsoft Dynamics/Zendesk integrations, advanced analytics, and dedicated account manager - but lacks critical enterprise features: no SSO/SAML authentication, limited to 50 users maximum, no contact center capabilities, no compliance certifications (HIPAA, PCI-DSS), basic API access only, and no true multi-site management for global deployments. Suitable only for upper-end small businesses (40-50 users), not true enterprise organizations with 100+ users.
- Free tier available
- Specialized capabilities for specific use cases
- May lack some features of top competitors
- Smaller community compared to leaders
Evaluation Criteria
- Scalability to support 100 10,000+ users across multiple locations
- Global calling coverage with included international minutes
- Contact center capabilities with omnichannel routing and analytics
- Enterprise security: SSO, SAML, encryption, compliance (HIPAA, PCI DSS, SOC 2)
- Advanced integrations: Salesforce, Microsoft Teams, custom APIs
- 99.999% uptime SLA with dedicated account management
- Comprehensive analytics, reporting, and workforce management tools
How We Picked These
We evaluated 5 products (last researched 2026-01-30).
Certifications, SSO, audit logging, data governance
Support for 100-10,000+ users across locations
APIs, pre-built connectors, customization options
Dedicated support, uptime guarantees, response times
Enterprise-specific capabilities and customization
Frequently Asked Questions
01 What is the best business phone system for global enterprises with international teams?
8x8 is the clear leader for global enterprises. The X Series with Contact Center at $44/user/month includes unlimited calling in 48 countries (US, Canada, UK, France, Germany, Spain, Italy, Australia, Japan, and 39 more) - significantly more than competitors. Dialpad Pro covers US/Canada only, Nextiva Essential covers US/Canada, Vonage Premium covers US/Canada/Mexico/Puerto Rico (4 countries), while 8x8's X Series covers 14 countries and the Contact Center tier covers 48 countries. For enterprises with offices across Europe, Asia, and Americas, 8x8 provides the most cost-effective international calling.
02 Which enterprise phone system has the best contact center capabilities?
8x8 X Series with Contact Center at $44/user/month provides the most complete built-in contact center: omnichannel routing (voice, email, chat, SMS, social), AI-powered analytics, workforce management, quality management, speech analytics, supervisor dashboards, and advanced IVR. Nextiva's contact center requires the Ultimate tier (custom pricing). Dialpad requires the separate Dialpad Support add-on starting at $75/agent/month. Vonage Enterprise includes contact center in custom pricing. For enterprises needing contact center out-of-the-box, 8x8 offers the best value.
03 What compliance certifications do enterprise business phone systems offer?
For regulated industries: 8x8 Enterprise tier provides HIPAA, PCI-DSS, and SOC 2 compliance. Dialpad Enterprise offers HIPAA and PCI compliance. Nextiva Ultimate supports HIPAA and PCI-DSS certifications. Vonage Enterprise includes HIPAA, PCI-DSS, and SOC 2 compliance. Ooma Office does not offer compliance certifications. Healthcare organizations needing HIPAA, financial services requiring PCI-DSS, or enterprises requiring SOC 2 must choose Enterprise tiers - mid-tier plans lack these certifications.
04 How much does a business phone system cost for 500 enterprise users?
For 500 users, approximate monthly costs (before taxes/fees): 8x8 X Series with Contact Center: $22,000/month ($44 × 500), Nextiva Enterprise: $16,475/month ($32.95 × 500), Dialpad Enterprise: custom pricing (likely $20,000-$30,000/month based on volume discounts), Vonage Enterprise: custom pricing (estimated $18,000-$28,000/month). All vendors offer volume discounts for 100+ users, typically 10-30% off list prices. Total cost of ownership includes taxes/fees ($2,500-$7,500/month for 500 users), phone hardware ($50,000-$250,000 one-time), and implementation services ($10,000-$100,000 depending on complexity).
05 Do enterprise phone systems integrate with Salesforce and Microsoft Teams?
Yes, all enterprise tiers integrate with Salesforce and Microsoft Teams, but depth varies: 8x8 X Series includes CRM screen pops and call logging. Nextiva Enterprise provides advanced Salesforce integration with custom objects. Dialpad Enterprise offers deep Salesforce/Microsoft integrations with AI-powered insights synced to CRM. Vonage Advanced includes Microsoft Teams integration and CRM features. Ooma Office Pro Plus integrates with Salesforce and Microsoft Dynamics. For deepest integrations with custom field mapping and bi-directional sync, Dialpad and Nextiva lead.
06 What level of support do enterprise phone systems provide?
Enterprise support varies significantly: 8x8 Enterprise includes dedicated account team, 99.999% uptime SLA, and priority support. Nextiva Enterprise provides dedicated account manager, priority support, and emphasizes their 'Amazing Service' promise. Dialpad Enterprise offers dedicated customer success manager, 99.999% uptime SLA, and premium support with faster response times. Vonage Enterprise includes dedicated account team, custom SLAs, and white-glove implementation. All provide 24/7/365 support, but response time SLAs, dedicated resources, and implementation assistance differentiate Enterprise tiers from mid-tier plans.
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