Amazon Lex

aws.amazon.com/lex
AI & Machine Learning
Weekend Project

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

How to Replace Amazon Lex

Overview

Amazon Lex is an AI chat builder powered by the same technology as Alexa that allows users to interact with applications using natural language voice or chat. It enables developers to build, deploy, and monitor conversational AI interfaces across multiple channels including mobile, web, and contact centers. The service provides an end-to-end solution for creating both voice and text-based chatbots with minimal coding required.

Features

31 features across 11 categories

AI(6)

Assisted Slot ResolutionAI

Leverage large language models to resolve slot values when native NLU is unable to, handling free-form responses

Automatic Speech Recognition (ASR)AI

Convert speech input to text with high accuracy, trained on telephony audio

Conversational FAQAI

Enable conversational answers to commonly asked customer questions using retrieval augmented generation (RAG) with foundation models

Generative AI-Powered ChatAI

Create voice and text interfaces powered by generative AI with advanced natural language capabilities

Natural Language Understanding (NLU)AI

Advanced NLU technology to understand user intent from natural language inputs

Sample Utterance GenerationAI

Automatically generate variations of sample utterances to improve intent classification accuracy using LLMs

Also in: monday.com, Notion, Airtable

Audio(1)

8 kHz Telephony Audio Support

Speech recognition engine trained on telephony audio for increased accuracy in telephone-based interactions

Builder(3)

Automated Chatbot DesignerAI

Analyze existing conversation transcripts to propose initial bot design with intents and slot types automatically

Descriptive Bot BuilderAI

Create a full bot based on a natural language description provided by the user, generating a baseline bot that can be refined

Visual Conversation Builder

Drag-and-drop conversation builder that accelerates bot building with no-code environment and visual feedback

Also in: Swipe Pages, Softr, WordPress.com

Conversation(6)

Barge-in Support

Allow users to interrupt and override bot responses for more natural conversational flow

Context Management

Native context management for multi-turn conversations without requiring custom code

Intelligent Pausing

Intelligent pause management for more natural sounding conversations

Multi-turn Dialog

Build sophisticated multi-turn conversations where users are prompted for required information across multiple exchanges

Streaming Conversations

Enable natural conversations with pauses and interruptions using streaming conversation APIs

Wait and Continue

Handle natural pauses and interruptions in conversations with advanced capabilities for natural sounding interactions

Also in: Claude

Deployment(1)

One-click Deployment

Easily publish bots to chat services directly from the Amazon Lex console

Also in: Kubernetes Dashboard, Hugging Face, Bitwarden

Integration(6)

Amazon Bedrock IntegrationAI

Leverage foundation models from Amazon and leading AI startups through Bedrock for generative AI capabilities

Amazon Connect Integration

Native integration with AWS omnichannel cloud contact center for handling customer queries over chat or phone

Amazon Kendra IntegrationAI

Integrate intelligent search powered by machine learning to find accurate answers from unstructured documents and FAQs

Amazon Polly IntegrationAI

Convert text responses to lifelike speech using standard or Neural Text-to-Speech voices

AWS Lambda Integration

Native integration with AWS Lambda for data retrieval, updates, and business logic execution

Omnichannel Deployment

Deploy chatbots across mobile devices and chat services like Facebook Messenger, Slack, Kik, or Twilio SMS

Also in: monday.com, Notion, Airtable

Lifecycle Management(2)

Bot Aliases

Create multiple aliases for bots and associate different versions such as production, development, and test

Versioning and Rollback

Apply versioning to Intents, Slot Types, and Bots with rollback mechanisms for multi-developer environments

Pricing(3)

Pay-as-you-go Pricing

Pay only for what you use with no upfront commitments or minimum fees, metered per API request

Request and Response Interaction Model

Billing model where each user input (voice or text) is processed as a separate API call

Streaming Conversation Pricing Model

Alternative billing model where all user inputs across multiple turns are processed in one streaming API call

Reporting(1)

Analytics Dashboard

Prebuilt dashboards with key metrics including total conversations, intent recognition rates, and user navigation insights

Testing(1)

Test Workbench

Author and execute test sets to measure bot performance, with automatic generation of audio and text-based test sets

UI(1)

Rich Formatting Capabilities

Tailored user experience for different chat platforms with platform-specific formatting

Pricing

Free Tier

Popular
Free for 1 year
  • 10,000 text requests per month
  • 5,000 speech requests per month
  • Full access for first year

Pay-as-you-go - Text Requests

$0.00075 per text request
  • Text request pricing

Pay-as-you-go - Speech Requests

$0.004 per speech request
  • Speech request pricing

Automated Chatbot Designer

$0.50 per minute of training time
  • Transcript analysis
  • Bot design generation

Cost Calculator

Pricing data not available for Amazon Lex. Check their website for current pricing.

Build vs Buy

Should you build a Amazon Lex alternative or buy the subscription? Estimate based on 31 features.

Buy Amazon Lex

Better Value
Monthly costContact Sales
3-year totalVaries
Time to deployDays

Build Your Own

Development cost$24,000
Maintenance$360/mo
3-year total$36,960
Dev time~2 months

Buying Amazon Lex saves ~$36,960 over 3 years vs building.

Estimates based on 31 features and a BuildScore of 5/5. Actual costs vary.

Integrations

17 known integrations

Amazon BedrockAmazon Chime SDKAmazon ConnectAmazon DynamoDBAmazon KendraAmazon PollyAmazon SNSAWS Contact Center Intelligence (CCI)AWS LambdaFacebook MessengerGenesys Cloud CXInfosysKikQuantiphiSlackTwilio SMSXapp.ai