Cloud Equivalents

Speech & conversational AI

Amazon Lex V2 vs Microsoft Copilot Studio / Azure AI Bot Service / Conversational language understanding (CLU)

Amazon Lex maps to Microsoft Copilot Studio (low-code agents) together with Azure AI Bot Service (channels).

Azure's intent engine, CLU, is deprecated and retires March 31, 2029.

Partial match Use it to: Build voice and text chatbots with intents, slots, and dialog flows for customer service.

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Side-by-side comparison

Conversational bot builder (intents & dialog): AWS vs Azure side by side
AspectAmazon Web ServicesMicrosoft Azure
ServiceAmazon Lex V2Microsoft Copilot Studio
Azure AI Bot Service
Conversational language understanding (CLU) Deprecated
LifecycleGenerally availableGenerally available
Generally available
Retires from Azure Language on Mar 31, 2029. Microsoft directs new projects to Microsoft Foundry. (Its predecessor LUIS fully retired Mar 31, 2026.)
What it isVoice and text chatbots with NLU and ASR, LLM-assisted NLU, conditional branching, Lambda fulfillment, and Amazon Connect integration.Low-code studio to build agents and workflows, connect them to enterprise data and systems, and publish to Teams, Microsoft 365 Copilot, web, and other channels.
Hosting, registration, and channel connectors (Teams, web chat, and more) for bots and agents built with the Microsoft 365 Agents SDK / Bot Framework or Copilot Studio.
Intent and entity models for conversational apps.
Pricing modelPer speech or text request (streaming conversations priced per interval).Copilot Studio uses capacity packs or pay-as-you-go messages/credits. Bot Service charges for premium channels, and standard channels are free.
DocsAmazon Lex V2 docsMicrosoft Copilot Studio docs
Azure AI Bot Service docs
Conversational language understanding (CLU) docs
Pricing pageAmazon Lex V2 pricingMicrosoft Copilot Studio pricing
Azure AI Bot Service pricing
Conversational language understanding (CLU) pricing
ExamsAIF-C01AB-620 AI-103

Key differences

  • Lex is a single AWS service (NLU, ASR, and dialog management) with LLM-assisted NLU, conditional branching, multi-Region replication, and native Amazon Connect integration.
  • Azure is modular. Copilot Studio (or the Microsoft 365 Agents SDK) handles the agent, Bot Service handles channels such as Teams and web chat, and CLU or LLMs handle intent understanding. LUIS fully retired Mar 31, 2026, and QnA Maker is retired.
  • Microsoft's own comparison maps Lex to conversational language understanding, but CLU is now on a retirement path. New projects should use Foundry models or Copilot Studio generative orchestration.

Pricing summary

Pricing models only. No prices are quoted because they change by region and over time.

AWS
Per speech or text request (streaming conversations priced per interval). Amazon Lex V2 pricing →
Azure
Copilot Studio uses capacity packs or pay-as-you-go messages/credits. Bot Service charges for premium channels, and standard channels are free. Microsoft Copilot Studio pricing → Azure AI Bot Service pricing → Conversational language understanding (CLU) pricing →

Certification exam mapping

ExamProviderLevelStatus
AWS Certified AI Practitioner AIF-C01AWSFoundationalcurrent
Italian and German versions retire after Oct 15, 2026 (per AWS cert page).
Microsoft Certified – AI Agent Builder Associate AB-620AzureAssociatecurrent
Copilot Studio, Power Platform, Microsoft 365 Copilot, and Foundry agents.
Microsoft Certified – Azure AI Apps and Agents Developer Associate AI-103AzureAssociatecurrent
Generative AI and agentic solutions with Microsoft Foundry using Python. Successor in scope to the retired AI-102.

Relevance is based on each exam's published scope, not a line-by-line objective match. Check the official study guide.

FAQ

What is the Azure equivalent of Amazon Lex V2?

Amazon Lex maps to Microsoft Copilot Studio (low-code agents) together with Azure AI Bot Service (channels). Azure's intent engine, CLU, is deprecated and retires March 31, 2029.

How does pricing compare between Amazon Lex V2 and Microsoft Copilot Studio, Azure AI Bot Service and Conversational language understanding (CLU)?

AWS: Per speech or text request (streaming conversations priced per interval). Azure: Copilot Studio uses capacity packs or pay-as-you-go messages/credits. Bot Service charges for premium channels, and standard channels are free. Check the official pricing pages for current rates.

Which certification exams cover this topic?

AWS Certified AI Practitioner (AIF-C01); Microsoft Certified – AI Agent Builder Associate (AB-620); Microsoft Certified – Azure AI Apps and Agents Developer Associate (AI-103).

What replaced LUIS on Azure?

Conversational language understanding (CLU). But CLU is itself retiring on Mar 31, 2029, and Microsoft directs new projects to Microsoft Foundry.

Related comparisons

Official sources