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Nextiva vs SIP.US Comparison (2026)

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Nextiva logo

Nextiva

SIP.US logo

SIP.US

Overview

Cloud-based AI customer experience platform unifying VoIP, omnichannel contact center, video, and team messaging for businesses of all.

SIP.US is a cloud-based VoIP solution, which helps businesses manage processes for providing SIP trunk services to analog/digital telephone adapters & IP-PBX systems. It operates on clients’ broadband internet connection and uses tier-1 network to set up business phones for routing dialer traffic.

  • Platforms supported
  • Web-based
  • iPhone app
  • Android app
  • Windows Phone app
  • Typical customers
  • Freelancers
  • Small businesses
  • Mid size businesses
  • Large enterprises
  • Customer support
  • Phone
  • Online
  • Knowledge base
  • Video tutorials
  • Platforms supported
  • Web-based
  • iPhone app
  • Android app
  • Windows Phone app
  • Typical customers
  • Freelancers
  • Small businesses
  • Mid size businesses
  • Large enterprises
  • Customer support
  • Phone
  • Online
  • Knowledge base
  • Video tutorials

Video & Screenshots

Pricing

Starting from

25

/user

Per month

  • Free trial available
  • Credit cardless trial
  • Free account
  • Subscription based

Starting from

14.95

Per month

  • Free trial available
  • Credit cardless trial
  • Free account
  • Subscription based

User reviews

4.6

919

5

4

3

2

1

729

101

38

10

41

  • Value for money
  • Ease of use
  • Features
  • Customer support
83%
would recommend this app

4.7

85

5

4

3

2

1

67

13

3

1

1

  • Value for money
  • Ease of use
  • Features
  • Customer support
84%
would recommend this app

Pros

“Routine tasks — sending a multi-page fax, copying a configuration — turn into multi-hour or multi-day ordeals. If your workflow depends on faxing or on managing your own phone configuration, look elsewhere before you commit.”
CG

Chris G.

Owner

“I explained that I was sold the account with the understanding that all 5 of my phone numbers could use SMS at the same time.”
Verified reviewer profile picture

Bob W.

owner

“The ability to call customers from the app where my personal cell phone number will not show up.”
AL

Amy L.

Office Manager

Pros

“There was a complete guide on how to setup our Grandstream UCM PBX with SIP.US and SIP.US also provided a phone number with the service.”
JT

Jason T.

Network Administrator

“They have redundancy options and the quality of the phone calls are just fantastic.”
JT

Jason T.

Network Administrator

“Sometimes when I need help I have to go back and forth with support between SIP and our phone system provider.”
AM

April M.

IT Admin

Cons

“I contacted support (each time I spent time with the AI agent and frustrated, would give up, ask for a live agent and be on hold for some time.”
Verified reviewer profile picture

Bob W.

owner

“Literally 20+ emails to close my account and they still charged my credit.card the momth after i closed my account.”
JS

Jason S.

President

“However, despite this, Nextiva continued charging our credit card for five additional months, without our authorization.”
JS

Joseph S.

HR Adminstrator

Cons

“I tried calling the customer service number, guy male who answered stated he can't assist me with the setup of my account so far, I'm definitely dissatisfied”
RM

RODNEY M.

CEO

“The lack of features and documentation were low points.”
pd

parsana d.

Administrator

“The customer portal feels a little disorganized to me.”
AD

Aaron D.

IT Director

  • Vendor responds to reviews
  • Last reviewa month ago
  • Vendor responds to reviews
  • Last reviewa year ago

Key features

  • Total features112
  • 360 Degree Feedback
  • AI Copilot
  • API
  • Access Controls/Permissions
  • Activity Dashboard
  • Agent Interface
  • Alerts/Escalation
  • Alerts/Notifications
  • Audio Calls
  • Audio/Video Recording
  • Auto-Dialer
  • Automated Attendant
  • Automated Routing
  • Automatic Call Distribution
  • Benchmarking
  • CRM
  • Calendar Management
  • Call Center Management
  • Call Conferencing
  • Call List Management
  • Call Logging
  • Call Monitoring
  • Call Queues
  • Call Recording
  • Call Reporting
  • Call Routing
  • Call Scheduling
  • Call Screening
  • Call Tracking
  • Call Tracking Metrics
  • Call Transfer
  • Caller ID
  • Canned Responses
  • Chat/Messaging
  • Collaboration Tools
  • Commenting/Notes
  • Complaint Monitoring
  • Computer Telephony Integration
  • Conferencing
  • Contact Database
  • Contact Management
  • Content Management
  • Customer Experience Management
  • Customer Surveys
  • Customizable Reports
  • Customizable Templates
  • Dashboard
  • Data Analysis Tools
  • Data Import/Export
  • Drag & Drop
  • Email Marketing
  • Employee Coaching Tools
  • Employee Directory
  • Employee Recognition
  • Fax Management
  • Feedback Management
  • File Sharing
  • For Cloud Phone Systems
  • Gamification
  • Generative AI
  • Goal Management
  • Help Desk Management
  • IVR
  • Knowledge Base Management
  • Live Chat
  • Live Results Sharing
  • Mobile Access
  • Mobile Survey
  • Monitoring
  • Multi-Channel Communication
  • Multi-Channel Distribution
  • Multi-User Collaboration
  • Offline Form
  • Offline Response Collection
  • Online Polling
  • Online Voice Transmission
  • PBX
  • Performance Management
  • Performance Metrics
  • Post Scheduling
  • Predictive Dialer
  • Proactive Chat
  • Quality Management
  • Question Library
  • Queue Management
  • Real-Time Chat
  • Real-Time Data
  • Real-Time Monitoring
  • Real-time Consumer-facing Chat
  • Reporting/Analytics
  • Response Validation
  • Ring Groups
  • Role-Based Permissions
  • SIP Trunking
  • SSL Security
  • Screen Sharing
  • Sentiment Analysis
  • Skip Logic
  • Social Media Monitoring
  • Support Audio/Images/Video
  • Survey Builder
  • Survey/Poll Management
  • Third-Party Integrations
  • Transcripts/Chat History
  • Transfers/Routing
  • Two Way Audio & Video
  • URL Customization
  • Unified Communications
  • Video Conferencing
  • Virtual Call Center
  • Virtual Extensions
  • Virtual Voicemail
  • VoIP
  • VoIP Connection
  • Voice Mail
  • Voicemail Transcription
  • Workflow Automation
  • Workforce Management
  • Total features12
  • 360 Degree Feedback
  • AI Copilot
  • API
  • Access Controls/Permissions
  • Activity Dashboard
  • Agent Interface
  • Alerts/Escalation
  • Alerts/Notifications
  • Audio Calls
  • Audio/Video Recording
  • Auto-Dialer
  • Automated Attendant
  • Automated Routing
  • Automatic Call Distribution
  • Benchmarking
  • CRM
  • Calendar Management
  • Call Center Management
  • Call Conferencing
  • Call List Management
  • Call Logging
  • Call Monitoring
  • Call Queues
  • Call Recording
  • Call Reporting
  • Call Routing
  • Call Scheduling
  • Call Screening
  • Call Tracking
  • Call Tracking Metrics
  • Call Transfer
  • Caller ID
  • Canned Responses
  • Chat/Messaging
  • Collaboration Tools
  • Commenting/Notes
  • Complaint Monitoring
  • Computer Telephony Integration
  • Conferencing
  • Contact Database
  • Contact Management
  • Content Management
  • Customer Experience Management
  • Customer Surveys
  • Customizable Reports
  • Customizable Templates
  • Dashboard
  • Data Analysis Tools
  • Data Import/Export
  • Drag & Drop
  • Email Marketing
  • Employee Coaching Tools
  • Employee Directory
  • Employee Recognition
  • Fax Management
  • Feedback Management
  • File Sharing
  • For Cloud Phone Systems
  • Gamification
  • Generative AI
  • Goal Management
  • Help Desk Management
  • IVR
  • Knowledge Base Management
  • Live Chat
  • Live Results Sharing
  • Mobile Access
  • Mobile Survey
  • Monitoring
  • Multi-Channel Communication
  • Multi-Channel Distribution
  • Multi-User Collaboration
  • Offline Form
  • Offline Response Collection
  • Online Polling
  • Online Voice Transmission
  • PBX
  • Performance Management
  • Performance Metrics
  • Post Scheduling
  • Predictive Dialer
  • Proactive Chat
  • Quality Management
  • Question Library
  • Queue Management
  • Real-Time Chat
  • Real-Time Data
  • Real-Time Monitoring
  • Real-time Consumer-facing Chat
  • Reporting/Analytics
  • Response Validation
  • Ring Groups
  • Role-Based Permissions
  • SIP Trunking
  • SSL Security
  • Screen Sharing
  • Sentiment Analysis
  • Skip Logic
  • Social Media Monitoring
  • Support Audio/Images/Video
  • Survey Builder
  • Survey/Poll Management
  • Third-Party Integrations
  • Transcripts/Chat History
  • Transfers/Routing
  • Two Way Audio & Video
  • URL Customization
  • Unified Communications
  • Video Conferencing
  • Virtual Call Center
  • Virtual Extensions
  • Virtual Voicemail
  • VoIP
  • VoIP Connection
  • Voice Mail
  • Voicemail Transcription
  • Workflow Automation
  • Workforce Management

Integrations

  • Total integrations12
  • 3CX
  • ActiveCampaign
  • Asterisk
  • CallRevu
  • Gong
  • Google Contacts
  • HubSpot Marketing Hub
  • HubSpot Sales Hub
  • Microsoft Access
  • Microsoft Outlook
  • Microsoft Teams
  • Salesforce Sales Cloud
  • VICIdial
  • Zoho CRM
  • Zoho Calendar
  • Total integrations3
  • 3CX
  • ActiveCampaign
  • Asterisk
  • CallRevu
  • Gong
  • Google Contacts
  • HubSpot Marketing Hub
  • HubSpot Sales Hub
  • Microsoft Access
  • Microsoft Outlook
  • Microsoft Teams
  • Salesforce Sales Cloud
  • VICIdial
  • Zoho CRM
  • Zoho Calendar

Alternatives

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