Get your 30 day free trial with 100 free calls or texts! Sign Up Free
Last Updated: Thu, Nov 17, 2022

Try Our Mass Calling System For Free Today

Our easy-to-use online service works great for Churches, Schools, Home Services companies and more.

Sigma Voice is a leading provider of 'one-to-many' automated calling and mass texting services. Schedule consultation Get started free

What Is Mass Calling?

Mass calling is a popular mass messaging technology like email and texting that broadcasts a pre-recorded audio message to a list of your contacts without the need to dial each phone number one by one. The Sigma Voice platform makes it easy to launch mass calling campaigns from a computer, tablet or even your smartphone fast.

The Sigma Voice system delivers your audio message within a few minutes to all your contacts. After your contacts answer and say hello, your message will be played. Alternatively, Sigma Voice will play your message to your contact's answering machine/voicemail recorder after the beep.

Why Use A Mass Calling Service?

When your message must be received in a timely manner, regular mail and email won't get the job done. Regular mail or snail mail is costly and slow. Email is cheap and fast, but open rates are only about 25% (1 out of 4 people) according to MailChimp.

Sigma Voice offers a web-based mass calling service that allows you to get your pre-recorded audio message to your contacts within minutes. There are no software license fees or phone lines you have to manage.

Also, Sigma Voice provides real-time detailed reports so you can be sure your message was received and heard. You'll even know which calls were answered by a human and which calls were answered by a machine.

Who Uses Our Mass Call Online App

Many organizations throughout the US and Canada use Sigma Voice to communicate with their customers, members and employees. Below are a few industries that get a great ROI from running calling campaigns on a weekly, monthly or quarterly basis.

  • Churches & Other Religious Institutions
    • Church service reminders
    • Upcoming events updates
    • Fundraising & donation requests
  • Schools & Universities (Both Public & Private)
    • Emergency alerts
    • Announce upcoming school
    • School holiday reminders
  • Home Services like HVAC, Pest Control & Carpet Cleaning
    • Special offers and coupons
    • Service and maintenance reminders
    • Birthday and holiday wishes
  • Senior Living Communities & Nursing Homes
    • Family members updates
    • Communicate with employees
    • Announce upcoming events
  • Recruiting & Staffing Agencies 
    • Stay connected with candidates
    • Request resume updates
    • Announce job openings

Common Uses

  • Fundraising Campaigns
  • Emergency Notifications
  • Service Reminders
  • Appointment Reminders
  • Payment Renewals
  • Employee Updates
  • School Closures

How To Use A Mass Calling Service

Our online automated calling system is very user-friendly and employs industry-standard SSL Encryption for security and privacy.

Once you've registered for our free trial, just follow the steps below to set up and launch your first mass phone calling campaign.

  1. Enter the Caller ID of your organization.
  2. Upload 1 or more of your phone lists of call recipients.
  3. Record your voice message by calling our dedicated toll-free recording phone line or by uploading the recording file directly into your account.
  4. Press the "Send Calls" button.

Mass Calling Software Features

  • Manage Multiple Groups
  • Add/Edit/Delete Contacts
  • Custom Caller ID
  • Answering Machine Detection
  • Retry Busy Phone Numbers
  • Schedule Call Campaigns
  • Opt-Out Functionality
  • Detail Call Reporting

We're Seeing Stars

Kristin Taylor profile picture Verified Customer

Kristin Taylor

Senior Living

Sigma Voice was so easy to set up. I needed to get an immediate message out to my 60+ family members. It’s affordable, the reports are amazing, and the customer service is beyond what I expected on a Sunday afternoon. Highly recommended!

Ken Doke profile picture Verified Customer

Ken Doke

Nonprofit Organization

I have been using Sigma Voice for a few years now on a number of campaigns. They have always been reliable and competitive. Their customer service is phenomenal. I highly recommend.

Pedro Hernandez profile picture Verified Customer

Pedro Hernandez

Medical Offices

This service is fantastic. Setting up automated calls is super easy and affordable. I highly recommend it.

Mark Hamilton profile picture Verified Customer

Mark Hamilton

Nonprofit Organization

Sigma Voice exceeded our expectations for our call out needs. When we needed changes made they were happy to do so and performed changes in a timely manner. I highly recommend Sigma Voice.

Haith Johnson profile picture Verified Customer

Haith Johnson

Retail Store

Absolutely LOVE THIS SERVICE!!! I recommend using Sigma Voice for any growing business!! We have got great responds & is a good way to stay in touch with your customers base! Helps us to turn customers to Loyal Customers to VIP Customers!!!

Emma Otto profile picture Verified Customer

Emma Otto

Retail Store

We have used SigmaVoice for our business for a few years now, and it has been a very good experience. The website is simple, straightforward, and easy to navigate. Customer service is excellent; professional and prompt.

Sigma Voice Icon

Increase revenue with
Sigma Voice

Get started free

Get started with free personalized support. Create your own custom calling and texting strategy with a Sigma Voice expert.


Schedule consultation

Popular Posts From Our Blog

Check out the Sigma Voice blog to learn about mass calling and texting best practices.


3X Your Email Marketing Strategy

Last Updated: Wed, Nov 16, 2022

25% email open rates mean that 75% of your subscribers do not read your email messages. This could lead to lost revenue. Fortunately, there are 2 simple ways to boost your email marketing strategy fast.


Express Written Consent - What It Is, How To Obtain It And Some Examples

Last Updated: Fri, Nov 18, 2022

Expressed written consent (EWC) is permission for something that is given specifically in writing. Learn how to obtain EWC from your contacts for automated calling and mass texting communications.


Grow Your Church Faster With A Phone Tree

Last Updated: Thu, Jan 26, 2023

Learn how an easy-to-use and effective church communication system can help increase the size of your Church.