3CX vs SIP.US

Microsoft Teams

Twilio

8x8 Work

Zoom Phone

Bandwidth

Flowroute 

Compare 3CX and SIP.US based on features, pricing, verified reviews, integrations & more on GetApp. Find out which software is best for your business in 2026.

Microsoft Teams is a chat-based workspace in Microsoft 365 which lets users collaborate on documents, make voice & video conference calls, view chat logs, and more. Teams has replaced Skype for Business as Microsoft's online meeting solution.

8x8 Work: Your all-in-one collaboration hub - phone, video, messaging. Secure unified communication for every employee, anywhere, any device.

Zoom Phone is a cloud VoIP phone software designed for businesses of all sizes. With a streamlined administration interface and secure voice calls, Zoom Phone offers a flexible solution for remote workforces. It also features global coverage, virtual phone numbers, fixed VoIP, cloud PBX, multi-line phone systems, and a Zoom Phone API, among other functionalities.

3CX is a phone system that handles call queues, built-in video calls, and web conferencing. It integrates website live chat, Facebook & text messages all in one system. The open-platform is fully compatible with popular IP phones & SIP trunks.

Access Controls/Permissions

Activity Dashboard

Activity Tracking

Activity/News Feed

Alerts/Escalation

Alerts/Notifications

Archiving & Retention

Audio Calls

Audio Capture

Audio/Video Conferencing

Auto-Dialer

Automated Attendant

Automated Routing

Automatic Call Distribution

Autoresponders

Blended Call Center

Calendar Sync

Call Center Management

Call Conferencing

Call Disposition

Call Logging

Call Monitoring

Call Queues

Call Recording

Call Reporting

Call Routing

Call Scripting

Call Tracking

Call Transfer

Callback Scheduling

Caller ID

Caller Profiles

Chat Transcript

Chat/Messaging

Collaboration Tools

Communication Management

Computer Telephony Integration

Conferencing

Contact Database

Contact Management

Customer History

Customizable Branding

Customizable Caller ID

Customizable Reports

Dashboard

Data Import/Export

Drag & Drop

Employee Directory

Fax Management

File Sharing

File Transfer

For Cloud Phone Systems

Inbound Call Center

Interaction Tracking

Live Chat

Manual Dialer

Meeting Management

Mobile Access

Monitoring

Multi-Channel Communication

Multi-Language

Multi-User Collaboration

Offline Form

On-Demand Recording

Online Voice Transmission

Outbound Call Center

Performance Management

Predictive Dialer

Proactive Chat

Progress Tracking

Progressive Dialer

Purchasing & Receiving

Queue Management

Real-Time Analytics

Real-Time Chat

Real-time Consumer-facing Chat

Real-Time Data

Real-Time Monitoring

Real-Time Notifications

Real-Time Updates

Recording

Reporting & Statistics

Reporting/Analytics

Ring Groups

Screen Sharing

Search/Filter

Single Sign On

SIP Trunking

SMS Marketing

SMS Messaging

Social Media Integration

Speech-to-Text Analysis

SSL Security

Support Ticket Management

Surveys & Feedback

Task Management

Android

Linux

Web-based

Windows

iPad

iPhone

Call Center Customer Service Representative 

The quality of the recorded calls is amazing and it makes them very useful for training purposes. 3CX gives you a lot of freedom to organize the call list in a way that works for you.

Estimator

Great integration with existing system, and helped us streamline the forwarding/holding/transferring process. VM to inbox was amazing.

Software Developer | Network Engineer

Support from the manufacturer is simply outstanding as there knowledge base and support team go the extra mile to help you.

Freelencer

Technical support was outstanding in assisting with the troubleshooting and setup.

I highly appreciate 3CX's compatibility with multiple SIP platforms and I really like the option of adding multiple profiles which can be very useful when working in multiple work environments.

Vice President Of Technology & Operations

It was inexpensive, there are local experts, easy to setup, and their new features continue to improve an already great platform.

Owner

It just works all the time. Windows or Linux (Debian) both versions whether in the cloud or on hardware are solid, solid, solid.

Student

3CX was a good start for my lab's VoIP controller, it covered the bases in terms of operating physical phones, and was a great learning experience.

Person

Great, ease of use, cost savings and mobility is the ticket in the modern world.

Customer Service & Inside Sales Manager

The vendor that we bought it from spent no time training us and we had several system issues that tarnished our experience.

Insurance Executive

We can make and receive calls, send messages, and hold video conferences seamlessly. The software also integrates smoothly with Microsoft 365, which has significantly improved our team's efficiency.

manager

We stopped wasting money on LANDLINES and chose 3CX as out internet phone PBX.

Professional Photographer

I like to use in windows and works wonderful with SIP Extensions without problems.

It can be slow and it's closed-source, which really annoys us.

Director

Errors trying to open the platform even though firewall off. Not sure the difference between the "management interface" and the "webclient.

Risk Operations Analyst

I like that this caters to be a substitute for a physical telephone within my organization. It is fast and easy to use more importantly, I could easily access it through my phone using the app.

The price can be FREE if you are a small office. Still, even for a larger organization the pricing is extremely affordable.

Network Manager

The interface is extremely intuitive and very user-friendly. Also, the install instructions are extremely easy and I was able to set up a virtual Debian server and install 3CX in under 30 minutes.

3CX screenshot: 3CX web client 

3CX screenshot: 3CX dashboard

3CX screenshot: 3CX Android and iOS business VoIP apps

3CX screenshot: 3CX’s integrated video conferencing

3CX screenshot: 3CX wallboard

3CX screenshot: 3CX WordPress Chat plugin

Freelancers

Large Enterprises

Mid Size Business

Non Profit

Public Administrations

Small Business

Twilio offers an API for phone services enabling companies to make and receive phone calls and send and receive text messages. It allows programmers to integrate various communication methods and to use existing web development skills and codes to solve communication problems.

Flowroute is designed to help businesses create, deploy, and manage a unified system for voice, SMS, MMS, and fax-based communication. The platform comes with a SIP trunking module, which allows enterprises to handle multiple voice calls using local and toll-free numbers.

Bandwidth offers a suite of API products for businesses and developers wanting to add voice calling, secured 2FA text messaging (SMS), MMS or 9-1-1 emergency call connectivity to software and applications, while also accessing SIP trunking, routing, address verification and number porting services

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.

Call List Management

SIP.US

IT Manager

The service level has been outstanding, availability being something we take for granted. Their customer service and support are refreshingly effective, which can be rare with traditional telecom.

IT Director

Overall SIP.us has been great. I continue to do business with them because of the quality of the service.

Paralegal 

Truly caring and there for you in a second. We have had good experiences with all of their tech support workers.

Director Remote I.T.

It was easy to setup the SIP trunks using this system. The support team at SIP.US is outstanding they have guides and will assist you with setting up your gear.

Ease of use to convert our SIP services over to a new provider. The porting process was seamless, the customer service communication was effective, and the after cutover support has been stellar.

Senior Engineer

When we had an 800 number, we had to pre-pay blocks of dollars for those calls. It was awkward from an accounting standpoint.

SIP.US made the port much simpler and handled the interaction with an uncooperative telco. The website management capability is outstanding.

Systems Consultant

I do contract work for businesses in London & Auckland and setting up a local DID is super helpful. Since my usage is quite variable I really appreciate the prepaid pay for what you use plans.

Network Engineer

A solution with great potential if your vendor knows what he is doing.

Their customer portal is simple and straight forward to use. We have been using them for years and their uptime has been excellent.

Systems Engineer

The service integrated into FreePBX/Asterisk with no fuss and has been rock solid. If you are looking for a simple self-service SIP provider SIP.US is an excellent choice.

But working great and has been for a long time. I have set up a few customers with sip.us for cost savings.

Updating e911 data as people move locations is as simple as entering the info and clicking SAVE. The support portal is easy to use and very responsive.

Office manager 

Cost-effective solution, never any major issue. Customer service is awesome.

President

Failures, issues and downtime: Too many to deal with for a service provider, lost VoIP clients due to Sip.us downtime that took too long to resolve.

SaaSOps Engineer

But from my PoV as a customer, what I see is simply that Skype-made calls work where SIP-made calls are failing to go through. So what is Skype doing that SIP cannot.

Ease of integration with the PBX (we use Asterisk). Clear user guide and documentation.

The UX can be convoluted at times. Sometimes a person we had on backup phones ages ago will still get a call, and I have found it difficult to get him removed.

3CX vs SIP.US Comparison (2026)

3CX

SIP.US

Overview

Video & Screenshots

Pricing

User reviews

Key features

Integrations

Alternatives