15 Best Voice Call APIs For Web or Mobile App [2023]

A voice name API allows companies to automate buyer calls and handle them programmatically with little to no human intervention.

Programmers can simply construct scalable, high-quality speech functions within the cloud or incorporate voice performance into already-existing functions and companies. This know-how’s capacity to design a customized voice answer that caters to your explicit enterprise necessities makes it so helpful.

Benefits of Using Voice Calling API

The greatest state of affairs through which such APIs may be actually useful is customer support and help administration. With the assistance of those APIs, you possibly can ship an automatic voice message when the help line is busy in order that the purchasers don’t have to attend for eternity!

Another space through which it’s helpful is advertising and communications. It helps companies to advertise new merchandise to their prospects.

Businesses can carry out all this stuff with out turning into an professional in telecoms infrastructure. They can direct the assets towards creating voice options that enhance the shopper expertise if they’ll deal with their major enterprise aims.

Here are some enterprise functions through which voice-calling APIs may be actually useful:

  • Sales & Marketing
  • Customer Service
  • Order Updates
  • Sending Reminders
  • Conducting Surveys

Key Features of a Voice API

#1. Interactive Voice Response

It makes it simpler for callers to achieve their desired answer by offering interactive menus and choices throughout a voice name. By doing so, most prospects can self-service and discover a answer; if not, they are often redirected to a stay human help agent.

#2. Call Recording

It provides companies extra management over gathering buyer insights and making knowledgeable selections based mostly on that. Also, it’s helpful for high quality assurance and compliance functions. However, prospects ought to know beforehand that the decision is being recorded.

#3. Text to Speech & Vice-Versa

Speech-To-Text and Text-To-Speech are vital in voice-calling APIs for programmable name responses and buyer interplay.

#4. Call Routing & Scheduling

This characteristic is essential in customer support facilities the place a number of prospects entry the identical line. The API ought to proficiently redirect every request to its respective division based mostly on some directions.

#5. Call Transfer

The API ought to be capable of switch calls from automated responses to a stay human agent if wanted and between a number of departments as properly.

These key options ought to be current in a decent-quality voice name API. Next, let’s have a look at some voice-calling APIs and the options they provide.


Agora is a real-time communications platform that gives merchandise and extensions corresponding to video calling, voice calling, broadcast streaming, and analytics. For voice calling, it supplies an SDK, i.e., a software program improvement package that enables builders to simply combine Agora voice API with their functions.

The voice calling SDK contains options corresponding to AI noise suppression and 3D spatial audio to create an immersive expertise. Also, you should use the real-time transcription characteristic for stay audio captions. The SDK is cross-platform, supporting Windows, MacOS, Android, Web, Flutter, Electron, and plenty of different platforms.

The better part is that it presents pay as you go pricing plan, and the primary 10,000 minutes are free each month.


The friendliest voice calling API.

Sendbird can be a communications platform providing a wide range of SDKs and APIs to facilitate video and voice calling in addition to stay streaming. It supplies SDKs for iOS, Android, Javascript, Unity, and React Native. While these SDKs care for the shopper aspect, the platform API takes care of the server-side monitoring of the decision performance.

It presents a dashboard for name analytics options corresponding to name logs, name metadata, admin calls, automated billing, and so forth. Sendbird is HIPAA compliant, making certain safety necessities for healthcare organizations. The pricing relies on variety of minutes per consumer.


Software builders can embody voice calling functionality into their functions and companies utilizing the APIs and companies offered by Twilio Voice, a cloud communication platform. It helps construct an enticing voice expertise that you may shortly scale and modify with numerous customization choices and assets.

Build more productive and personalized voice calling API.

With the assistance of voice intelligence, companies can flip voice calls into actionable information insights with machine studying. Also, they’ll analyze and activate name recordings to create customized voice experiences that drive income.

Twilio voice presents options corresponding to:

  • Call monitoring
  • Embedded calling
  • Masked calling
  • Global conferencing
  • Interactive Voice Response

Fortunately, Twilio presents pay-as-you-go pricing plans so that you don’t get locked into massive contracts.


Dolby additionally supplies a communications API for voice and video calling, and by utilizing it, you possibly can leverage the power to create crystal-clear voice chat and name to your browser, cell, and PC apps.

APIs and SDKs for voice calling.

It supplies options corresponding to a voice exercise detector, automated acquire management, and dynamic audio leveling. All of this detects speech, removes background noise, retains undesirable sounds out, and maintains constant ranges between purchasers.

It is GDPR, HIPAA, and SOC-2 compliant. Dolby presents a free and pay-as-you-go plan for its voice-calling API.


Plivo is a communications platform with an API platform for messaging, voice calls, and options for gross sales and help groups. Its voice-calling API permits you to combine voice calling inside your functions and programmatically make, obtain, and management calls worldwide.

Voice calling API platform.

For internet functions, plivo supplies a browser SDK, and for native cell apps, it supplies a separate cell SDK. Features embody:

  • Voicemail Transcription
  • Text to Speech
  • Call Feedback API
  • Dynamic Caller ID

Same as different platforms, it supplies a pay-as-you-go pricing mannequin.


SignalWire is a cloud communications platform offering numerous companies, together with voice calling, video conferencing, SMS messaging, and so forth. It guarantees unmatched voice high quality with Hi-Fi Voice know-how, no extra crackling voices or customers sounding like they’re abroad.

API for voice calling.

The novice options it presents to ship voice streams to any URL from a name in real-time. This is useful when monitoring buyer help calls. The pricing plans for SignalWire are way more advanced.


Enablex’s easy-to-implement Voice APIs and SDKs allow you to market quicker and luxuriate in crystal-clear name high quality. You could make and obtain calls from anybody with an web connection or a cellphone quantity. Also, you possibly can embed Voice-over-IP (VoIP), PSTN, and SIP calling instantly into your app or browser utilizing your most well-liked programming language.

Reach anyone with a robust voice calling API.

Features embody:

  • Group voice name
  • Virtual numbers
  • Automated voice messages
  • SIP Interconnect

Enablex presents versatile in addition to pay-as-you-go pricing plans.


With the assistance of RingCentral Voice APIs, you possibly can programmatically customise your apps in order that they might make and obtain calls, deal with voicemails, and set off webhooks. RingCentral is a communications platform providing a wide range of APIs for numerous communication channels.


With RingCentral’s voice calling API, you possibly can route and handle calls dynamically in real-time, prolong or customise your present apps to incorporate voice capabilities and combine AI programs. It presents free limitless calling throughout the US and Canada.


Telesign is a communications platform as a service that gives safe communication and identification verification options. With its voice API, you possibly can construct safe and dependable A2P, P2A, and P2P voice functions utilizing internet and cell platforms.


Some of the options offered by Telesign’s voice API are:

  • Auto speech recognition
  • Monitor site visitors
  • Speech-To-Text
  • Interactive Voice Response

You can purchase and implement cellphone numbers throughout 120+ international locations and in addition reformat cellphone numbers, in addition to file calls. You can contact Telesign’s gross sales group to get info on pricing plans.


Vonage is a world communications platform offering communication companies and specializing in conversational commerce. You can combine third-party synthetic intelligence bots utilizing WebSockets, allow self-service in additional than 120 languages utilizing automated speech recognition, and in addition mix voice and social media channels for elevated buyer interactions.

Voice calling API - a powerful tool for integrating voice communication capabilities into applications and systems.


  • WebRTC Support
  • WebSockets
  • Audio streaming
  • Speech Synthesis Markup Language
  • Globally Distributed Call Controls
  • Fraud Defender

It presents pay-per-use pricing plans.


MirrorFly voice calling API permits you to join, handle, & route calls throughout any gadget and get limitless audio calling. It lets companies construct voice functions with its programmable voice API. You could make and obtain calls from browsers, apps, and internet functions to cater to your small business wants.

API for voice calling on any device and platform.

Here are a few of its options:

Using its low-latency voice API, as much as 250 contributors throughout the globe can take part in discussions, conferences, and webinars with clear voice high quality.


ZegoCloud supplies real-time interplay companies for cloud communication and goals to revolutionize digital engagement with real-time interplay. It goals to attach enterprises, groups, prospects, and customers.


UI kits and SDKs are the 2 other ways to implement Zegocloud’s voice-calling APIs. If you wish to combine voice calling options into your utility with out caring a lot about UI, then you possibly can go for the UI kits. Otherwise, Zegocloud additionally supplies low-level SDKs for voice API integration. As far because the pricing is anxious, Zegocloud follows an analogous pay-as-you-go idea.


Bandwidth supplies cloud-ready voice, messaging, and emergency service connectivity constructed for the enterprise.


Several options of the voice API are talked about under:

  • Call Control
  • Real-Time Transcription
  • Answering Machine Detection
  • Conferencing
  • Media Streaming

Building a customized voice calling answer that’s good for patrons with out constructing your personal telecom infrastructure and embedding inbound and outbound calling capabilities instantly into your utility is what Bandwidth’s voice API tries to attain.


Sinch is a cloud buyer communications platform that permits you to combine messaging, voice, or electronic mail capabilities into the appliance and allows you to have significant conversations with improved scalability, deliverability, and cost-effectiveness.


Its extra of a buyer engagement enchancment software; nevertheless, the options offered by its voice API are:

  • Number masking
  • Phone name verification
  • Secure Telephone Identity Revisited (STIR)
  • Recorded Prompts
  • Voice-based IVR

At the time of writing, there’s no pricing info obtainable, so you should contact gross sales for that.


Infobip is a world communications platform that gives quite a lot of APIs and applied sciences that permit corporations work together with their purchasers by means of SMS, voice, electronic mail, chat apps, and different communication channels.


Common options are talked about under:

  • SIP trunking
  • WebRTC
  • Number masking
  • IVR

Its voice API lets companies join with their prospects with options corresponding to automated voice calls, pre-recorded audio information with over 100 supported languages, recorded calls, environment friendly name routing, detailed name reporting, and way more.

Final Words

Choosing a voice API isn’t based mostly on what cool encompasses a platform supply. It solely is dependent upon your small business necessities and what you wish to obtain from the API. However, it is best to choose a voice API, retaining safety and reliability in thoughts. By evaluating numerous voice APIs, you possibly can conclude that they’re extra appropriate to your wants.

If you wish to discover buyer engagement instruments, listed below are some open supply stay chat software program to look out for.

Vikash Gorayan

Vikash Gorayan is a technology enthusiast with a passion for gadgets and product management. He is constantly seeking new opportunities to learn and grow in his field.

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