Amazon Lex

Input—per 1M tokens

Output—per 1M tokens

Context—tokens

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About

Amazon Lex is ranked #2 of 257 in chatbot builders on Inferse. It runs on Android, API, iOS, Web. There is a free plan. Paid plans start at $0.50/mo.

Compared on chatbot builders

Free plan: Noaws.amazon.com
Deployment channels: multichannelaws.amazon.com
Visual flow builder: Yesaws.amazon.com
AI bot generation: Yesaws.amazon.com
Knowledge-base answers: Yesaws.amazon.com
Human handoff: Yesaws.amazon.com

Facts

Free plan: Noaws.amazon.com · 21 Sept 2026
Deployment channels: multichannelaws.amazon.com · 21 Sept 2026
Visual flow builder: Yesaws.amazon.com · 21 Sept 2026
AI bot generation: Yesaws.amazon.com · 21 Sept 2026
Knowledge-base answers: Yesaws.amazon.com · 21 Sept 2026
Human handoff: Yesaws.amazon.com · 21 Sept 2026
Purpose: Amazon Lex builds conversational interfaces for applications using natural language voice or chat.aws.amazon.com · 3 Oct 2026
Speech and language: Lex provides automatic speech recognition and natural language understanding for voice and text chatbot interactions.docs.aws.amazon.com · 3 Oct 2026
Generative AI: Lex supports conversational FAQ responses using an intent that queries an authorized knowledge source and foundation models from Amazon Bedrock.aws.amazon.com · 3 Oct 2026
Bot design: The Automated Chatbot Designer analyzes conversation transcripts and proposes an initial bot design with intents and slot types.aws.amazon.com · 3 Oct 2026
Conversation testing: Test Workbench lets builders create and run test sets and review aggregated performance results and detailed insights.aws.amazon.com · 3 Oct 2026
Channels: Bots can be deployed across mobile devices and chat services including Facebook Messenger, Slack, Kik, and Twilio SMS.aws.amazon.com · 3 Oct 2026
AWS integrations: Lex integrates with AWS Lambda for backend business logic, Amazon Cognito for user authentication, and Amazon Polly for text-to-speech.aws.amazon.com · 3 Oct 2026
Contact centers: Lex natively integrates with Amazon Connect, and AWS says pre-built integrations with other contact center solutions are available.aws.amazon.com · 3 Oct 2026
Use cases: AWS lists self-service voice assistants, informational bots, transactional bots, enterprise productivity bots, and device-control bots as common use cases.aws.amazon.com · 3 Oct 2026
Security and compliance: Amazon Lex V2 is HIPAA eligible and AWS describes it as PCI, SOC, and ISO compliant.docs.aws.amazon.com · 3 Oct 2026
Transport security: Lex V2 clients must support TLS 1.0 or later, and AWS recommends TLS 1.2 or later.docs.aws.amazon.com · 3 Oct 2026
Language availability: Amazon Lex V2 supports multiple languages and locales, while some features are limited to particular languages or locales.docs.aws.amazon.com · 3 Oct 2026
Pricing model: Lex charges based on usage, with request-and-response and streaming conversation interaction models and no upfront commitment or minimum fee.aws.amazon.com · 3 Oct 2026
Maker history: Amazon Web Services says it launched in 2006.aws.amazon.com · 3 Oct 2026