A quick and easy guide to voice assistants

16 Jul 2021 | 14 min read
What are voice assistants and how they work

In October 2011, Siri, the mobile voice assistant, was introduced as a feature in the iPhone S4, giving users the unique possibility to issue spoken commands and questions to their devices. It was the first time when voice assistance was made available to a larger audience. 

A decade later, voice recognition software is all the talk in tech, with researchers predicting that  the speech recognition market will reach almost $30 billion by 2026! With the technology being so widely used, it goes without saying that businesses should keep a close eye on it. 

In this article, we’re going to cover the topic from the very basics: from what voice assistants are, how they work and how they can be used, all the way to future possibilities. Ready to see what opportunities lie behind natural language processing? Let’s find out! 

What are voice assistants? 

In order to make everything crystal clear, we’re actually going to have to go through two definitions. 

The first, broader one, would be virtual digital assistants. Those are software apps able to understand human language and perform tasks based on written or spoken input

Now, voice assistants are nothing more than a type of virtual digital assistants that respond to spoken commands.

Voice assistants can thus perform a variety of tasks including answering questions, making calls and sending messages, playing your favourite music, setting up alarms and creating to-do lists, and much, much more. 

What is the purpose of voice assistants?

The primary purpose of developing voice recognition software is to make everyday life easier in business and private life. Voice assistants can perform many tasks for your business while you are occupied with something else. In addition, they can replace a human being in completing specific tasks, such as: answering questions, making calls, creating to-do lists, and much more. They, therefore, allow you to save time and help you multitask. 

An essential aspect of speech recognition software is that it can significantly facilitate the functioning of people with disabilities.The assistant can search for and read information, run various functions, or even order a taxi using only voice commands. This significantly facilitates accessibility for people with disabilities, as they do not need to be able to operate a screen or see specific information at all.

How do voice assistants work? 

Process of building voice assistants

Communicating with a voice assistant is so simple it almost makes us forget how impressive the technology behind it actually is. 

If you’ve ever used a voice assistant on your phone, then you know that it first needs a keyword that activates it, like ‘OK, Google’. When you pose a question or give a command to your voice assistant it is converted thanks to the use of Automatic Speech Recognition (ASR), which enables the device to recognise and translate it from speech to text

After that comes text interpretation: thanks to Natural Language Processing (NLP), the machine can identify the intent behind what you said, the meaning of the words as well as context.

Now that the machine knows what was said and (presumably) what your intention was, it can search for a valid answer, and respond accordingly. The response is converted from written to spoken form using a text-to-speech (TTS) technology, and voila: your voice assistant speaks. All done in a matter of seconds! 

Popular voice assistants

There’s a variety of voice assistants currently on the market, but some of them have become so widely used, it’s pretty much a given you’ve heard about them in one way or another. 

Let’s take a closer look at what they have to offer. 


As we’ve mentioned, Apple’s Siri was the first voice assistant to become available on such a large scale. Being a mobile-based voice assistant, Siri is able to perform lots of different tasks, like making phone calls, sending text messages, taking photos, answering questions and showing weather forecasts. Additionally, Siri is also used for devices compatible with HomeKit – Apple’s home automation system. 

Google Assistant

Google Assistant was introduced into the market in 2016, and deployed to Android devices a year afterwards, making it a natural rival to Siri. The tasks Google Assistant can perform don’t vary much from what Siri is capable of, though it is sometimes referred to as ‘the smarter’ out of the two. Google Assistant can also be used to control smart devices compatible with Google Home. 

Amazon Alexa

Contrary to Google Assistant and Siri, Alexa is speaker-based, meaning it’s not installed directly on your smartphone, but rather receives your commands through Amazon Echo speakers. It is considered the best voice assistant for home automation, as it integrates with a large variety of smart home devices. 

Microsoft Cortana 

Developed in 2014, Cortana is an assistant created mainly for the purpose of Windows 10 and Microsoft 365 products, making it possible for users to organise and manage their work more efficiently. Even though it is similar to Siri and Google Assistant in its abilities, Microsoft has been struggling to keep up with the big players, and as of 2021 Cortana is no longer supported for iOS and Android

How voice assistants can help your business

We’ve established that voice assistants can help to ease our everyday lives by a lot, but that’s not the end of it. Voice assistants have also proven to be beneficial for business when they’re put to good use. Let’s browse through some of the possibilities! 

Improved customer service

Improved customer service icon

Virtual assistants as a whole can make customer experience way faster and more personalised, and with more and more people using voice technology, companies should be aware of how they provide their clients with the best experience possible. An AI-powered voice assistant is a great way to quickly provide people with the answers they need, without having to engage your employees at all. 

Curious about a real-life example? Check out PZU’s custom voice assistant we helped to build!

Better work efficiency

Better work efficiency icon

This one can be easily traced back to customer service – when a voice assistant is taking care of your clients, your employees can focus on more important tasks. But that’s only one example. With voice assistants, things such as time reporting, writing e-mails, setting reminders, organising meetings, and countless other mundane tasks are done more quickly and efficiently.


Communication icon

International business relations are an everyday occurrence in the age of globalisation, but language barriers can still prove to be an issue that needs to be tackled. Translation with the use of voice assistants has become much more accurate (with Google Assistant’s interpreter mode being a good example, and can help to make communication a lot smoother and easier to understand for all the parties involved. 


Organisation icon

Life in an office can become pretty chaotic sometimes, especially when it comes to large companies. The most obvious aid from voice assistants in terms of organisation comes in the ability to quickly set up meetings, calls, reminders, etc., but that’s not all. They can also prove to be a huge help in terms of HR support, helping to navigate internal company documents and policies in a much quicker way. 

Accessible services

Accessible services icon

Accessibility in mobile apps has been a hot topic in the tech world for many years, and the trend to make digital products available to every type of user is only going to continue. By integrating voice assistance into your products, you make them accessible to people with visual or movement impairments and gain a competitive advantage. 

Challenges in implementing voice assistants for business

Privacy concerns

In today’s world full of smart devices, data privacy is an extremely crucial aspect of human life. It is, therefore, essential to protect it, especially if voice recognition technology will come into contact with your customers. The privacy and security of your customer’s data are a priority, so you need to ensure that your voice assistant collects and processes only necessary data. If you want to implement a voice assistant into your product or business, you must comply with all legal data protection and privacy requirements applicable in your country, such as the General Data Protection Regulation (GDPR).

Artificial Intelligence Learning

In cases where you want to use a voice assistant for strictly defined activities, such as contacting customers, you need to provide machine learning app development with data to let the artificial intelligence learn how to communicate with them. Sometimes you can use existing documentation for training purposes, but this may not perfectly fit your business needs. In addition, data alone is not enough; after all, you must implement it properly afterward.

Finding the right AI development company

Although Artificial Intelligence services are becoming increasingly popular, it is still not so easy to find skilled developers capable of adequately implementing machine learning. This is due to the fact that AI development is a highly complex area of the technology industry. It requires working with advanced algorithms and a great deal of expertise. For that particular reason, it’s so important to find the right specialists to ensure that the voice assistant is implemented appropriately.

The future of voice assistance

It is predicted that by 2024 there will already be more voice assistants than humans in the world. So there’s no doubt that speech recognition technology is here to stay. The general expectation for the future is that voice assistants will become increasingly better at recognising words, voices, meaning, and context behind commands, and will be able to aid us in an even more precise and personalised way. 

Voice assistants or chatbots may be able to hold a human-like, perfectly natural conversation, which is something Google is already trying to figure out. The technology will also greatly influence how search on the internet is performed, which means new opportunities for product promotion and marketing. And with smart home devices being more prevalent every year, it is safe to say that voice assistants will become more entangled in our lives, making our everyday tasks less of a bother. 

The continued growth of voice recognition technology is inevitable. This is mainly related to the strong impact of artificial intelligence-based technology on business development. The main advantage of implementing voice assistants is facilitating daily operations and thus reducing costs. Moreover, they also bring many other business benefits such as improved customer service, better work efficiency or communication. So it’s time to consider developing the virtual assistant in your digital product.

Luiza Stelitano Content marketing specialist

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