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SIP.US

Voice over internet protocol (VoIP) solution

Table of Contents

Is this product right for your business?

Find out with a

SIP.US - 2026 Pricing, Features, Reviews & Alternatives

All user reviews are verified by in-house moderators and provider data by our software research team. Learn more

Last updated: March 2026

SIP.US overview

What is SIP.US?

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

SIP.US’s self service control panel allows firms to purchase phone numbers, manage network services and modify billing preferences. The centralized platform offers real-time data of call records and allows users to store them in a unified database and download files in .CSV format, giving insights into communication requirements as well as business performance. Plus, direct inward dialing (DID) enables enterprises to display telephone numbers across international locations and make requests for new VoIP connections, establishing contact with prospects and clients.

SIP.US provides nomadic service operators for displaying clients’ addresses on softphones when they make emergency calls, enabling agents to geo-target customers. Integration with various open source systems and graphical user interfaces allows organizations to configure network connection settings based on business requirements.

Starting price

14.95 /
per month

Alternatives

with better value for money

Pros & Cons

Call Quality

Billing

Ease of Use

Training and Learning Curve

SIP.US’s user interface

Ease of use rating:

4.7

(85)

SIP.US pros, cons and reviews insights

To determine these pros and cons insights, we analyzed responses from

Overall rating

Reviews sentiment

1-2(2)

3-4(16)

5(67)

What do users say about SIP.US?

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

Select to learn more

Who uses SIP.US?

Based on 85 verified user reviews.

Company size

Small Businesses

Midsize Businesses

Enterprises

Top industries

Hospital & Health Care

Accounting

Computer Software

Telecommunications

Others

Use cases

VoIP

SIP.US's key features

Most critical features, based on insights from SIP.US users:

Caller id

1.0

(1)

Call routing

4.0

(4)

SIP trunking

4.0

(4)

Call monitoring

3.7

(3)

All SIP.US features

Features rating:

4.5

(85)

Caller id

1.0

(1)

Call list management

(0)

Call monitoring

3.7

(3)

Call reporting

1.0

(1)

Call routing

4.0

(4)

Call tracking

1.0

(1)

Call transfer

(0)

Contact database

1.0

(1)

Real-Time monitoring

1.0

(1)

SIP trunking

4.0

(4)

SIP.US alternatives

SIP.US

4.7

(85)

Starting from

14.95

Per month

Free trial

Free version

Ease of Use

4.5

Features

4.5

Value for Money

4.6

Customer Support

4.6

Telnyx Suite

4.8

(195)

learn more

Starting from

Per month

Free trial

Free version

Ease of Use

4.7

Features

4.7

Value for Money

4.8

Customer Support

4.6

VoIP.ms

4.8

(697)

learn more

Starting from

1.1

Per month

Free trial

Free version

Ease of Use

4.4

Features

4.7

Value for Money

4.8

Customer Support

4.8

Zoom Phone

4.5

(244)

learn more

Starting from

/user

Per month

Free trial

Free version

Ease of Use

4.6

Features

4.5

Value for Money

4.5

Customer Support

4.2

SIP.US pricing

Value for money rating:

4.6

Pricing plans

Pricing details:

Free plan

Free trial

Subscription

SIP Channels

24.95

Per month

Features included:

Includes Local and Long Distance Calls to the Us48 States and Canada (Excluding NWT) at No Additional Charge. Excludes Any Local
State or Federal Taxes and/or Fees

Inbound DID Telephone Numbers

0.00

Features included:

All Inbound Calls Include CNAM Service Delivery Included
Enhanced Dids Include the Ability to Register a Location Address for 911 Calling (Test by Dialing 933)
You Are Able to Set PSTN Forward and PSTN Backup Redirects Per DID on the Web Portal
You Are Able to SET the 15-Character Callerid Name (CNAM) Value Per DID at No Charge on the Portal

SimpleFAX™ Service

24.95

Per month

Features included:

Adapter Comes Pre-Configured and Ready for Use Out of the Box
All Faxes Sent and Received Over Traditional Copper Lines (Pris)
High Reliability – No T.38 or Fax Over IP Problems!
Web Portal to View All Faxes Sent and Received

Fax-to-Email

14.95

Per month

Features included:

Change Your Fax Callerid Number Directly in Our Portal
Incoming Faxes Are Sent to Your Registered Email Address as a PDF
No Faxing Over IP – All Faxes Sent and Received Over Traditional TDM Circuits (PRI Lines)
Send Document Attachments From Your Registered Email Address as Outbound Faxes
View a History of Your Sent and Received Faxes on Our Web Portal

Business SMS

Per month

Features included:

10000 Message Plan Can Be Shared Across Multiple Dids. Other Plans Are Per-DID Only
Billing Is Calculated on a Per-Message Basis and Billed Once a Month on Your Rebill Day as a Separate Line Item
But Not All DID Telephone Numbers on SIP.US Can Be Enabled for SMS-to-Email Functionality
Incoming SMS Messages to the Enabled DID Will Be Sent to the Email Address(S) You Specify. You Can Also 'Send' SMS Messages via Email Using This Service. On the Management Page
Most
When Enabled
You Can Enable SMS Functionality on Your Dids That Support SMS as Well as Specifying the Email Address(S) Where the Messages Will Be Sent. You Can Also View Usage on Each SMS-Enabled DID

User opinions about SIP.US price and value

Value for money rating:

4.6

(85)

To see what individual users think of SIP.US's price and value, check out the review snippets below.

“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.”

Jason T.

Network Administrator

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

Jason T.

Network Administrator

SIP.US integrations (3)

Integrations rated by users

We looked at 85 user reviews to identify which products are mentioned as SIP.US integrations and how users feel about them.

3CX

Integration rating: 4.5 (2)

“Integration with 3CX is important because it enables seamless VoIP communication within Freshdesk, allowing agents to make and receive calls directly, track interactions, and improve overall customer support efficiency.”

Martin A.

Snr Technical Product Support Engr

Asterisk

Integration rating: 5.0 (1)

Zoiper

Integration rating: 4.0 (1)

“Good workaround for the non-working mobile app of phone.systems.”

“Already made a review, it is easy to work with, light and fast”

Philipp R.

Senior development

1/2

Other top integrations

VICIdial

SIP.US customer support

What do users say about SIP.US customer support?

Customer support rating:

4.6

We analyzed verified user reviews to identify positive and negative aspects of SIP.US customer support.

Widely noted by reviewers, SIP.US support is fast, knowledgeable, and consistently resolves issues efficiently.

A significant portion of users appreciate the helpful guidance during setup, porting, and troubleshooting processes.

A minority of users report slow response times, occasional unhelpful attitudes, and limited self-service or phone support options.

Support options

Phone support

Email/help desk

Chat

Faqs/forum

Knowledge base

Training options

Documentation

To see what individual users say about SIP.US's customer support, check out the review snippets below.

“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.”

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.”

April M.

IT Admin

“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”

RODNEY M.

CEO

SIP.US FAQs

Popular comparisons with SIP.US

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