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Amazon Lex vs Microsoft Dynamics 365 Chat

Amazon Lex logo

Amazon Lex

Live Chat

AWS conversational AI service

From
Free
Rated
-
Full reviewWebsite
Microsoft Dynamics 365 Chat logo

Microsoft Dynamics 365 Chat

Live Chat

Omnichannel chat solution integrated with Microsoft ecosystem

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Amazon Lex has a free tier, so it costs nothing to try first.
  • Each has a real cost: Amazon Lex pay-as-you-go model with no standard free tier, only AWS free credits for new customers (6 months, $200 limit); Microsoft Dynamics 365 Chat specific pricing not disclosed on product page
  • They diverge on capability: Amazon Lex covers Speech recognition, Microsoft Dynamics 365 Chat covers Omnichannel messaging.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Amazon Lex and Microsoft Dynamics 365 Chat actually diverge.

Attributes where Amazon Lex and Microsoft Dynamics 365 Chat differ
AttributeAmazon LexMicrosoft Dynamics 365 Chat
Starting priceFreeOn request
Pricing modelusage-basedsubscription
Free tierYesNo
PlatformsWeb, AWS CloudWeb, Mobile app, IOS, Android
Founded20061975

Identical on both: user rating (Not yet rated), category (Live Chat).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Amazon Lex

  • Speech recognition
  • Natural language understanding
  • Voice and text
  • Lambda integration
  • AWS services
  • Lambda
  • DynamoDB
  • SNS

Only in Microsoft Dynamics 365 Chat

  • Omnichannel messaging
  • Live chat
  • Email support
  • Social media integration
  • Outlook
  • Teams
  • 365
  • Power BI

Both cover

  • Web support

What people use each for

The jobs each tool is most often brought in to do.

Amazon Lex

  • Chatbot developmentnot Microsoft Dynamics 365 Chat
  • Voice-based conversational AInot Microsoft Dynamics 365 Chat
  • Natural language understandingnot Microsoft Dynamics 365 Chat

Microsoft Dynamics 365 Chat

  • Customer service omnichannel communicationnot Amazon Lex
  • Multi-channel customer engagementnot Amazon Lex
  • AI-powered customer conversationsnot Amazon Lex
  • Enterprise customer service automationnot Amazon Lex

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Amazon Lex

  • Pay-as-you-go model with no standard free tier, only AWS free credits for new customers (6 months, $200 limit)
  • Speech requests cost $0.004 each, text requests $0.00075 each, training costs $0.50 per minute
  • Variable costs can accumulate quickly for high-volume applications

Microsoft Dynamics 365 Chat

  • Specific pricing not disclosed on product page
  • Directs users to separate pricing overview page for details
  • Requires contacting sales for custom quotes and pricing

Pricing, plan by plan

Amazon Lex

Free
  • Standard Usage$0.004/per speech request
    • Speech requests at $0.004 each
  • Text Requests$0.00075/per text request
    • Text requests at $0.00075 each

Microsoft Dynamics 365 Chat

On request
  • Customer Service Professional$100/month
    • Basic chat
    • Ticketing
  • Customer Service Enterprise$200/month
    • Advanced omnichannel
    • AI integration
  • Premium$undefined/month
    • Custom solutions
    • Dedicated support

Which should you pick?

Choose Amazon Lex if

  • You need speech recognition.
  • You want to start without paying.
  • You work on Web, AWS Cloud.
  • You also want natural language understanding.
Amazon Lex review

Choose Microsoft Dynamics 365 Chat if

  • You need omnichannel messaging.
  • You work on Web, Mobile app, IOS, Android.
  • You also want live chat.
Microsoft Dynamics 365 Chat review

Questions people ask

Is Amazon Lex or Microsoft Dynamics 365 Chat better?
Neither clearly leads. Amazon Lex starts at Free and Microsoft Dynamics 365 Chat at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Amazon Lex or Microsoft Dynamics 365 Chat?
Amazon Lex has a free tier; the other does not. Paid plans start at Free for Amazon Lex and On request for Microsoft Dynamics 365 Chat.
Does Amazon Lex or Microsoft Dynamics 365 Chat run on more platforms?
Amazon Lex runs on Web, AWS Cloud. Microsoft Dynamics 365 Chat runs on Web, Mobile app, IOS, Android.
Can I use Amazon Lex for free?
Yes. Amazon Lex has a free tier, so you can try it without paying. Microsoft Dynamics 365 Chat starts at On request.
What is Amazon Lex best used for?
Amazon Lex is most often used for chatbot development, voice-based conversational ai, natural language understanding. Of those, chatbot development and voice-based conversational ai are not what Microsoft Dynamics 365 Chat is typically brought in for.
What can Amazon Lex do that Microsoft Dynamics 365 Chat cannot?
Amazon Lex covers Speech recognition, Natural language understanding, Voice and text, Lambda integration. Microsoft Dynamics 365 Chat covers Omnichannel messaging, Live chat, Email support, Social media integration. Both handle Web support.

Answered from the vendors’ own pages

Amazon Lex: How much does Amazon Lex cost?

Amazon Lex charges $0.004 per speech request and $0.00075 per text request with no upfront commitments or minimum fees required.

Source
Microsoft Dynamics 365 Chat: How much does Microsoft Dynamics 365 Chat cost?

Specific pricing for Dynamics 365 Chat is not published on the product page. Pricing information is available on Microsoft's separate Dynamics 365 pricing overview page, with custom quotes available through sales contact.

Source
Amazon Lex: Is there a free tier for Amazon Lex?

Yes, new AWS customers receive 10,000 text requests and 5,000 speech requests per month free for the first year. Additional $200 in AWS Free Tier credits are available for new customers as of July 15, 2025, with all credits expiring within 12 months.

Source
Microsoft Dynamics 365 Chat: Is there a free trial for Dynamics 365 Chat?

Microsoft Dynamics 365 offers free trials that users can request directly from the product page. Exact trial duration and terms are determined during the trial request process.

Source
Amazon Lex: What is the example monthly cost for Amazon Lex?

For 8,000 speech requests ($32) and 2,000 text requests ($1.50), the approximate monthly total is $33.50, though actual costs vary based on usage volume.

Source
Microsoft Dynamics 365 Chat: Can I compare Dynamics 365 Chat plans and pricing?

Microsoft provides plan and pricing comparison on their dedicated pricing overview page. Users should visit the Dynamics 365 pricing section to see available plans, features, and pricing tiers before contacting sales.

Source
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