AI voice assistants can easily understand and respond to your spoken commands and execute various tasks using artificial intelligence (AI), natural language processing (NLP), and other voice recognition technologies.

These assistants have revolutionized the communication channel between businesses and customers, making the processes more efficient and interesting. Want to learn more details? This post of Solvea helps you understand the AI voice assistant from all aspects.

What is an AI Voice Assistant

An AI voice assistant is a virtual platform that can understand and respond to human voice commands using a combination of technologies, including artificial intelligence (AI), natural language processing (NLP), and speech recognition.

It can assist you in handling various tasks, from answering common questions and managing schedules to controlling smart home devices and providing customer service through natural spoken voice.

What Can AI Voice Assistants Do

AI voice assistants can be used to handle plenty of tasks, from answering FAQs and scheduling appointments to fixing complex tech issues. They built a new communication approach between your businesses and customers through natural conversational flows.

For instance, in the world of customer service, an AI voice assistant can help you do these tasks:

1. Automatic reply: It can automatically reply to customers and provide personalized information based on the CRM data.
2. Understand spoken commands: The natural language understanding (NLU) system enables the assistant to understand what humans mean rather than just what they say.
3. Complete tasks: It can help you perform various tasks, like appointment scheduling, reminder setting, alarm creation, data entry, and more.
4. Retrieve information: including customer profiles, product recommendations, delivery, news, weather, and so on.
5. Multi-language support: switch between multiple languages and understand the actual meaning based on the context.

What’s the Best AI Voice Assistant in 2025

There are plenty of AI voice assistants that align with your specific demands. We have compiled the top 5 AI voice assistants on the market that boast a variety of features, from conversational capabilities to task management. Let's start exploring them:

1.Alexa

Alexa is Amazon’s cloud-based AI voice assistant that’s a great choice for home users. It is a versatile voice assistant that helps you manage smart home devices easily, from playing music and turning on lights to adjusting the thermostat in your living room. It even allows you to set up your own voice profile so that it only listens to your voice commands.

Key features:

1. Stream music from Amazon Music and Spotify
2. Play audiobooks from platforms like Audible.
3. Control smart home devices
4. Helps you shop on Amazon
5. Give news briefings and weather forecasts
6. Make calls to contacts

Pricing: Starts at $30 for a single speaker with an Amazon Echo device.

2.Siri

Siri is an exclusive AI-powered voice assistant for iOS users. It was developed for all Apple devices, including iPhones, watches, iPads, and Macs. It listens to your voice commands like ‘Hey, Siri” and then executes actions, like sending messages, playing music, and opening apps. Built on the Apple Neural Engine, Siri makes it easy to enjoy personalized service while maintaining data security and privacy.

Key features:

1. Offers the latest news podcast, like weather updates, sports scores, etc.
2. Control smart home devices via HomeKit
3. Translate languages
4. Integrations with Apple-related apps
5. Play music from various sources and identify songs

Pricing: comes free with your Apple devices.

3.Google Assistant

If you are using Android devices, Google Assistant is an ideal choice. It works with a wide range of Android devices, including Android smartphones, Google Nest smart speakers, and compatible smart home devices. It can be used to perform hands-free tasks, like getting local information, controlling apps, making calls, and answering questions. Users can start interacting with it by saying "Hey Google" or "Okay Google".

Key features:

1. Control your smart lights, thermostats, and other connected devices.
2. Pull up any web-based information with just a simple command.
3. Play music, videos, and podcasts from YouTube, Spotify, and other apps.
4. Make calls to your contacts.
5. Broadcast messages to your Google Family Group.
6. Get directions with Google Maps.

Pricing: free to use on Android devices.

4.Retell AI

Retell AI is good for businesses that are seeking customized voice assistants to improve call operations. It was designed to automate tasks, like appointment scheduling, customer support, reception services, and lead qualification. It allows you to build the assistant into your company’s internal documentation and create an Auto-Sync Knowledge Base. By doing so, the agent can quickly learn your company information and provide customer support.

Key features:

1. Design the AI assistant with your own voice and personality.
2. Integrate with your existing smart devices and services.
3. Strong data security and HIPAA compliance, especially in sectors like healthcare.
4. Understand the context of conversations via Large Language Models (LLMs).
5. Automate customer service calls.

Pricing: start with a free plan. The pay-as-you-go option costs $0.002 to $0.006 per minute. For extra features, like OpenAI Voices, you need to pay an extra $0.08 per minute for that.

5.Otter AI

Otter.ai is suitable for individuals and organizations, especially for educators and researchers, who have frequent meetings and need to take notes on every detail. It provides accurate transcription notes and allows you to replay audio while reading the transcript and share notes with your team. Besides, it can summarize meetings, generate captions, and create written notes to help you improve productivity and collaboration.

Key features:

1. Automatically joins Zoom, Google Meet, or Microsoft Teams calls.
2. Speaker identification features can distinguish between voices and label them.
3. Real-time transcription converts spoken words to text.
4. Import existing audio and video files for transcription.

Pricing: The free version can transcribe meetings, and the Pro Plan version costs $16.99/month to transcribe up to 1,200 minutes of voice entries.

How to Choose an AI Voice Assistant

It is important to choose the best AI voice assistant for your business. Take customer service solution as an example, here are the key features and capabilities you need to consider for the AI voice assistant:

1. Integrations: Make sure the AI voice assistant software can integrate with your current CX systems, like call center software and order management systems.
2. Customized functionalities: Look for specific functions that your businesses may need, such as automated ticketing, translation, and multiple communication channels.
3. Security and privacy: Ensure this software complies with your company's or industry’s data privacy and security policies.
4. High scalability: Choose an AI voice assistant that can keep evolving with your company’s development.
5. Cost: Don’t waste your budget on AI voice assistants. Instead, compare their pricing models and features to find a solution that fits your budget.

How to Make an AI Voice Assistant

It may seem complex for your business to create an AI voice assistant, but we can break it down into controllable steps to simplify the process. Here’s a step-by-step guide to help you build an AI voice assistant.

Step 1. Identify Your Goals and Needs

First of all, it’s necessary to determine your primary objectives before building the AI voice assistant. Think about what tasks you want the assistants to handle and how they will improve your business operations. To do that, you can refer to the two principles below:

1. Start with actual cases: you should consider the actual use cases of the assistant, such as handling FAQ, scheduling meetings or appointments automatically, recommending products, or integrating with an IVR system to cut down wait times on repetitive inquiries.
2. Expand gradually: If you want to tackle more complex issues, expanding the capabilities of the assistant is also important as your business evolves. For example, you may need to provide multi-step customer resolutions, offer detailed product recommendations, or automate other IVR workflows.

Step 2. Choose the Right Technology Kits

Choosing the right technology tools is vitally important for creating an efficient AI voice assistant. These factors should be considered comprehensively, including data security, scalability, and integration capabilities. The following is the necessary tech toolkit to develop an AI voice assistant:

1. Programming Language: Python is the most widely recommended programming language for creating an AI voice assistant due to its extensive libraries and frameworks.
2. AI voice generators: To understand natural language, try these powerful voice generators like OpenAI’s ChatGPT, ElevenLabs, Murf, etc.
3. AI & Machine Learning (ML) libraries: Choose AI/ML libraries that boast strong speech recognition, text-to-speech synthesis, and Natural Language Understanding (NLU).
4. Development platforms: If you want to use a no-code approach, try these platforms, like Voiceflow, Synthflow, or Lindy.ai.

Step 3. Design the Conversational Flow

The process of designing the conversational flow has a great impact on how effectively the voice assistant interacts with users. Follow the tips below to help you design a clear and intuitive conversational flow.

1. Design conversation paths: Map out common paths and dialogues that your assistant needs to handle, such as greetings, follow-up questions, etc.
2. Build emergency plans for common challenges: There are some common issues to solve during voice interactions. For example, an overlong response time can frustrate users, overcomplicated interactions confuse users, and the voice lacks natural interruptions. All these issues should have corresponding solutions.

Step 4. Train Your AI Voice Assistant

Training your assistant ensures it can understand users’ actual intent in different scenarios. We recommend you use real-world data to help the assistant handle various issues and improve its accuracy. To do that:

1. Collect historical data: Create a comprehensive training data set by using the historical customer data or simulating real-life scenarios.
2. Test language model performance: Train the assistant based on a language model that can handle ASR-transcribed text and understand speech variations effectively.
3. Consider uncommon queries: Including uncommon queries can ensure the assistant performs consistently and reliably in various interactions.

Step 5. Test the AI Voice Assistant

Before the full launch of this AI assistant, test it thoroughly to ensure smooth interactions and optimal performance. The test should focus on improving conversational accuracy, system integration, and customer experience.

1. Perform usability testing: Simulate real conversations and evaluate the ability of the assistant to handle various queries while maintaining smooth and natural dialogues.
2. Test transcribes accuracy: Check if the automatic speech recognition (ASR) system can accurately transcribe spoken voice before broader usage.
3. Identify potential challenges: Monitor the performance of the assistant during high call volume to identify potential bottlenecks.

AI Voice Assistant FAQ

1.How to change an AI voice assistant?

The detailed steps vary depending on different devices and voice assistants. For example, if you want to change the default AI voice assistant on an Android device, you can tap on Settings and navigate to Apps > Choose default apps, then select Digital assistant apps, and choose your preferred voice assistant.

2.How to change the AI voice assistant to female?

Suppose you want to change the Google Assistant voice back to female. You can open the “Home” app, click the “Profile” icon at the bottom right, select “Settings”, and tap the assistant voice option to change it to female.

3.What is the best AI voice assistant?

There are various AI voice assistants on the market that match different demands. For home users, Alexa is ideal. Siri is best for Apple users. Other assistants, like Bixby for Samsung devices and Otter AI for business tasks.

4.Which is the best voice assistant?

To be honest, there is no single “best” voice assistant, which depends on your needs. For example, Amazon Alexa is a leader in smart home control and music streaming. Google Assistant excels at answering questions and works well with Google services. Apple Siri is the best choice for those who care about privacy.

5.Which AI is best for voice?

There are many types of AI voice models to meet your specific needs. For instance, ElevenLabs is best for realistic voice cloning and audiobooks, Murf.ai focuses on text-to-speech and professional quality, and Speechify offers human-like cadence and diverse voice options.

6.Can ChatGPT do voice AI?

Yes, ChatGPT offers advanced voice models that enable you to create real-time and natural voice conversations. It can generate a spoken response with a human-like tone and create a natural conversational flow.