Answering Machine Detection

Intelligently detect answer machines while saving time and maximizing the ROI of your contact centers operations with Esendex’s programmable answer machine detection API.

What Is Answer Machine Detection & When to Use It?

Answering machine detection (AMD) is a feature that detects when a call is sent to an answering machine—the name gives it away, right? An AMD detection tool can be used as standalone software but is often integrated with voice broadcast services. Our answering machine detection service is an all-in-one voice broadcasting and API solution that lets you send and receive up to 12,000 tier-1 bulk calls per minute.

To help ensure the best experience and service possible, we offer answering machine detection for when clients miss a call. AMD detection allows you to determine if a human, answering machine, or even fax machine picked up your outgoing call.

Powerful Answering Machine Detection Features

Anything is possible when you combine our AMD detection API services with these fantastic features! Our answering machine detection service delivers the tools you need to boost company sales, revenue, and engagement and stay connected with your customers.

Interactive Voice Response

Build manageable call flows that deliver incoming calls to the correct department and representative without issue.

Answering Machine Detection

Our voice broadcaster can determine if a human, fax, or answering machine picks up outgoing calls from your business.


Transform your text messages into an automated voice call in multiple voices and languages to send to customers.

Press 1 Voice Campaign

Enable callers to enter numbers on their devices that either collect information or route calls to different departments.

Outbound Conference API

Our voice message broadcaster connects calls to a conference & communicates with multiple people at once.

Multichannel Communication

Our automated voice broadcasting service can send mass phone calls & bulk SMS to your entire contact list.

Real-Time Reports

Our phone broadcasting API provides detailed reports of calls back to your database for analysis, optimization, & call tracking.

Mobile & Landline Calls

Easily broadcast voice messages directly to customers using mobile and digital landline devices to reach everyone.

Call Quality Monitoring

Gauge mass call conversations between customers and staff to improve customer service and other business systems.

Why Choose Esendex’s Answer Machine Detection Service?

When you choose Esendex, you don’t get an average answering machine detection API. Join hundreds of clients that trust and use our AMD detection tool. We go above and beyond to make sure we meet each of your unique marketing and communication needs.

We’ve been talking a big talk, but we’re willing to put our features where our mouth is to prove it. We value quality and reliability, so when you sign up for our services, you get the Esendex advantage.

Free Testing

Test our AMD API for a limited time with free, fully-functional trial keys.

100% SLA

We’re committed to providing you with the best services & software.

Safe & Secure

We use location fail-over, redundant HVAC systems, and 24/7 monitoring.

You’ve Got Options with Answer Machine Detection

When Answering machine detection (AMD) API determines that a live call is not taking place, you have options about whether or not to leave a voicemail, as well as what type of voicemail to leave.

  • Automatic voicemails – Our AMD API leaves an automatic voicemail.
  • Manual voicemails – An agent leaves a manual voicemail.
  • No voicemails – AMD API disconnects the call, leaving no voicemail.
What About Live Calls?

An answering machine software or API immensely helps identify voicemails, but what about live calls? What happens when someone picks up the phone or calls back? When that happens, it’s helpful to take advantage of our IVR phone system (interactive voice response).

Interactive Voice Response (IVR)

An IVR phone system or IVR API is an over-the-phone menu system that allows consumers to be easily routed according to their needs and the purpose of the call. Almost everyone has used IVR before. For example, when you call your doctor’s office and press 1 for appointments, or when you call a restaurant and press 2 to make a reservation? That’s IVR! Businesses use IVR APIs to route calls and save time for employees and consumers.

How Does It All Work Together?

Our programmable AMD detection API is jam-packed with features and tools to make sure you reach your marketing and communication goals. Answering machine detection and IVR are just two of those tools.

Simple Answer Machine Detection Documentation

Our answering machine detection API documentation is easy to understand and implement into your applications or website. You can easily connect to our telephony AMD detection tool using any programming language.

  • Uncomplicated Voice API References
  • Code in Multiple Programming Languages
  • Detailed FAQ Section to Answer Questions
  • Get Technical Support for Any Issues

How Does Answer Machine Detection Work?

Now that you know what answering machine detection is, we’re betting that you want to know how it works. You’re in luck! You’ve got questions, and we’ve got the answers. AMD detection detects whether or not a live call is taking place based on speech, silence, and duration.

Algorithms analyze these factors to determine whether it’s a human or machine on the other end of the line. Voicemails usually contain a long string of words with little silence, while live callers answer the phone and then wait for a response.

Benefits of Answer Machine Detection

Ring, ring — It’s destiny calling. Okay, not really, but we think your business and our voice broadcast API were meant to be. Don’t you think so? Just look at all these great benefits of answer machine detection.

  • Improve agent productivity
  • Drive lead conversions
  • Increase agent talk time
  • Decrease abandonment rates
  • Expedite outbound calls

And those are just the benefits specific to answering machine detection! Check out our voice broadcast service’s benefits when you take advantage of all its marketing and communication features.

More Answer Machine Detection Benefits

Endless Possibilities

Well, you get the point. If you can think of it, our voice broadcast dialer can help you do it. You can use AMD detection, and our voice API for almost anything, from appointment reminders to password resets to flash sale alerts to credit card verifications to.

Save Time & Money

Send thousands of calls per minute, automatically detect live calls or voicemails, and immediately route calls to the proper source — all with the touch of a button. Oh, and you can also do the same for texts. Can we make it any easier?

Boost Sales & Callbacks

You can call thousands of people every minute, but what if they don’t answer? No worries, integrate our SMS API to send them a message or leave a voicemail. Studies show that leaving a great voicemail leads to increased callbacks.

Remember KISS

Keep your voicemails short, simple, and to the point. People lead busy lives and have short attention spans. If a voicemail is overly long or vague, people will delete it.

Be Personable

Did we mention that people will also delete voicemails if they sound automated or boring? Make sure your voicemails are personable and friendly.

Speak Clearly

Speak clearly and concisely when leaving a voicemail so understand. This also means making sure background noise doesn’t overpower your message.

Scenario 1: Voicemail

“Hi, this is John Doe. You just missed me, please leave a message at the beep.”

In this scenario, a voicemail would immediately begin playing. Voicemails are usually lengthier than greetings from live callers and have less pauses. The cadence of your voice is often steadier, with less variation in volume and emphasis. If you don’t have a recorded voicemail and instead rely on the default voicemail, this is especially true. The algorithms would pick up on this and correctly detect an answering machine.

Scenario 2: Live Caller

“Hello, this is Jane Doe. … Hello? … Is anyone there?”

Opposite to the previous scenario, a person picks up this time and a live call is initiated. There is usually a short salutation and then silence as you wait for an answer. This may repeat once or twice as you continue to wait. The pitch of your voice may go higher or lower, emphasis may be placed on certain words, and your tone may change. The algorithms would analyze these factors and then label the call as live.

Scenario 3: AMD Accuracy

It’s important to note that AMD isn’t 100% correct all of the time.

Answering machine messages vary and can sometimes be mistaken for a live caller depending on the voicemail. Additionally, factors such as the tone of your voice (or voicemail), background noise, music, and sine tones all affect answering machine detection and its accuracy.

What Our Customers Have to Say

See why our customers think Esendex has the best voice broadcasting service.
We’ve been rated 5 out 5 stars on Capterra, GetApp, Google, and Facebook – based on 40+ reviews.

Quality Customer Support

Most voice broadcasting companies don’t have active online support channels customers can speak to when they need it the most, and we understand. That’s why we have 24/7, around-the-clock emergency support for our voice messaging service.

Expect fast response times, fast troubleshooting, and easy-to-read voice API documentation that will never leave you waiting for answers. Contact us via live chat, phone, or email about our voice API today.

Products for a range of use cases


Texting API designed to send & receive SMS & MMS globally using a short code or 10DLC number.

SMS Software

Easy to use SMS software that can send & receive SMS & MMS using a short code or 10DLC number.

Voice Broadcast

Powerful voice API that sends mass automated phone calls quickly to mobile & landline devices.

Phone Verification

Verify mobile & landline numbers, find service providers, & define time zones to restrict calling.

Let’s start sending, together.