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Amazon Lex

Get started with Amazon Lex with AWS Free Tier

Amazon Lex - AI Chat Builder

Add sophisticated, natural language, AI-powered chatbots to new and existing applications.

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What is Amazon Lex?

Powered by the same technology as Alexa, Amazon Lex is an AI chat builder that allows users to interact with any application using natural language voice or chat. Use Amazon Lex to build and deploy conversational AI interfaces for any application. Integrating AI chat into existing business processes and use cases gives users more flexibility and support to get work done in ways that are natural to your users. AI chat experiences in customer-facing applications enhance customer satisfaction. 

Benefits of Amazon Lex

Create voice and text interfaces powered by generative AI. Amazon Lex provides an easy-to-use, secure, scalable end-to-end solution to build, publishdeploy, and monitor AI chatbots. Use the power of generative AI to allow users to complete tasks through voice and natural language interactions. Give users more options in how they interact with your applications and systems.
Deploy your text and voice AI chatbots across mobile devices and chat services like Facebook Messenger, Slack, Kik, or Twilio SMS. Amazon Lex natively integrates with Amazon Connect, the AWS’ AI-powered cloud contact center, so you can build conversational AI bots that handle omnichannel customer queries across channels, including chat or phone. Pre-built integrations with other contact center solutions are also available.
Your developers can build an AI chatbot using natural language prompts. They can provide a natural language description to generate and refine a baseline bot as needed. Amazon Lex automated chatbot designer simplifies bot design by utilizing existing conversation transcripts. The Amazon Lex Visual Conversation Builder (VCB) allows everyone to contribute more to bot design. Launch AI-powered chat capabilities in hours instead of days.

Pay only for what you use with no upfront commitments or minimum fees. Amazon Lex processes all inputs across multiple turns in one streaming API call or through multiple request-response API calls, depending on your AI chatbot design. Your usage is metered and billed per API request.

How text and voice AI chat transforms business processes

80%

IVR Containment rates within the contact center
NAB (National Australian Bank)

65%

Increase in self-service rate
nib Health Insurance

35%

Completely automated end-to-end calls
AMA (Alberta Motor Association)

30%

Reduction in agent call volume
WaFd Bank

Use cases

Enable end-customer self-service capabilities across interactive voice response (IVR), chat, and SMS to solve customer queries quickly and efficiently. To learn more about AWS' contact center solution, see Amazon Connect.

Build text and voice AI chat interfaces that seamlessly connect customers to the right human agent in the contact center.
Design conversational solutions that respond to frequently asked questions for technical support, HR benefits, finance and more.

Allow users to complete end-to-end tasks like making a booking, raising a ticket, generating a report, submitting an application, and more using natural language or voice AI chat.

FAQs

Yes. You can use Amazon Lex, a fully-managed AWS cloud service, to build your application's AI chatbot or AI chat interface. Amazon Lex offers building, testing, and deployment tools to quickly get started and accelerate AI chat development.
An AI chat interface allows users to interact with your applications through natural language, generative AI-powered chat. For example, if you have a flight booking application, your users can ask the AI chat interface for flight details, make a booking, request changes, and more. It allows users to interact with the app more intuitively and get more done faster than traditional UI/UX experiences.
AI chat can be used in any way that supports meaningful and flexible interactions with your applications. You can use it for self-service customer support, human resource management, search, and sales inquiries. You can also integrate AI chat functionality in social media messaging apps and on phone calls as interactive voice response (IVR).

Yes. You can use Amazon Lex to create and use a free chatbot for one year. From the date you start with Amazon Lex, you can process up to 10,000 text requests and 5,000 speech requests per month for free for the first year. If your AI chat usage is less than this threshold, you can run your chatbot at no cost for the first year.

Starting July 15, 2025, new AWS customers will receive up to $200 in AWS Free Tier credits, which can be applied towards eligible AWS services, including Amazon Lex. At account sign-up, you can choose between a free plan and a paid plan. The free plan will be available for 6 months after account creation. If you upgrade to a paid plan, any remaining Free Tier credit balance will automatically apply to your AWS bills. All Free Tier credits must be used within 12 months of your account creation date. To learn more about the AWS Free Tier program, refer to AWS Free Tier website and AWS Free Tier documentation.

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