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Amazon Lex
AWS service for building conversational chatbots with voice and text.
Amazon Lex is AWS's service for building conversational chatbots with voice and text. It uses the same technology as Alexa to understand natural language, and it powers chatbots for customer service, appointment booking, and self-service on websites and phone systems.
Key Features
- Build chatbots with voice and text
- Natural language understanding from Alexa tech
- Automated Chatbot Designer from transcripts
- Integrates with AWS Lambda and Connect
- Works on web, mobile, and phone systems
- Pay-as-you-go pricing
Pricing
| Plan | Price | Details |
|---|---|---|
| Free tier | $0 | New accounts get up to $200 in credits for 6 months; older free tier gave 10,000 text and 5,000 speech requests a month for 12 months. |
| Pay as you go | From $0.00075/request | Text $0.00075 per request; speech $0.004 per request; streaming speech $0.0065 per 15 seconds. |
| Automated Chatbot Designer | $0.50/min | $0.50 per minute of training time. |
Prices as listed in 2026 research. Always check the official site for the latest price — plans change. Free plan: Yes — it has a free plan.
Best for: AWS teams that want to build conversational chatbots with voice and text.
Popular with: Developers, Business Owners
Popular with: Developers, Business Owners
How it works
The service includes tools for designing conversations, testing bots, and integrating with other AWS services such as Lambda, Connect, and DynamoDB. An Automated Chatbot Designer can build a bot from your existing conversation transcripts.
Pricing is pay-as-you-go: text requests cost $0.00075 each and speech requests $0.004 each. New AWS accounts get up to $200 in credits for 6 months, and the older free tier offered 10,000 text and 5,000 speech requests a month for the first 12 months. Amazon Lex suits AWS teams that want a scalable chatbot service.
Pros and Cons
✓ Pros
- Proven Alexa-based language understanding
- Scales with AWS infrastructure
- Good integrations with AWS services
- Automated designer saves setup time
✗ Cons
- No permanent free tier for new accounts since July 2025
- Pricing is per request, so costs scale with traffic
- Needs AWS and developer skills
Frequently Asked Questions
Is Amazon Lex free?
Yes — Amazon Lex has a free plan. Pay as you go from $0.00075/request; new accounts get credits
What is Amazon Lex best for?
AWS teams that want to build conversational chatbots with voice and text.
What kind of tool is Amazon Lex?
Amazon Lex is a AI Chatbots tool on VerlumoAI.
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View detailsLast reviewed: November 2026