Softwr

Live Chat · head to head

Amazon Lex vs Zendesk Answer Bot

Amazon Lex logo

Amazon Lex

Live Chat

AWS conversational AI service

From
Free
Rated
-
Full reviewWebsite
Zendesk Answer Bot logo

Zendesk Answer Bot

Live Chat

AI-powered chatbot for automated customer support

From
$55/month per agent
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); Zendesk Answer Bot limited to Help Center articles only; cannot access customer account data, billing information, or external systems
  • They diverge on capability: Amazon Lex covers Speech recognition, Zendesk Answer Bot covers AI chatbot.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Amazon Lex and Zendesk Answer Bot actually diverge.

Attributes where Amazon Lex and Zendesk Answer Bot differ
AttributeAmazon LexZendesk Answer Bot
Starting priceFree$55/month per agent
Pricing modelusage-basedUnknown
Free tierYesNo
PlatformsWeb, AWS CloudWeb, Email, Slack, Mobile
Founded20062007

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 Zendesk Answer Bot

  • AI chatbot
  • Knowledge base integration
  • Intent recognition
  • Multi-language support
  • Zendesk Support
  • Zendesk Chat
  • Slack
  • API

Both cover

  • Web support
  • Mobile support

What people use each for

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

Amazon Lex

  • Chatbot developmentnot Zendesk Answer Bot
  • Voice-based conversational AInot Zendesk Answer Bot
  • Natural language understandingnot Zendesk Answer Bot

Zendesk Answer Bot

  • Customer engagementnot Amazon Lex
  • Lead generationnot Amazon Lex
  • Customer supportnot Amazon Lex
  • Sales 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

Zendesk Answer Bot

  • Limited to Help Center articles only; cannot access customer account data, billing information, or external systems
  • Fixed timeout limits on API calls prevent lookups to external systems from completing
  • Does not perform actions like refunds or account updates; only suggests documentation
  • Uses keyword matching rather than true natural language understanding, leading to mismatched suggestions on complex queries

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

Zendesk Answer Bot

$55/month per agent
  • Suite Team$55/month per agent
    • Answer Bot included
  • Suite Growth$89/month per agent
    • Answer Bot included
  • Suite Professional$115/month per agent
    • Answer Bot included

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 Zendesk Answer Bot if

  • You need ai chatbot.
  • You work on Web, Email, Slack, Mobile.
  • You also want knowledge base integration.
Zendesk Answer Bot review

Questions people ask

Is Amazon Lex or Zendesk Answer Bot better?
Neither clearly leads. Amazon Lex starts at Free and Zendesk Answer Bot at $55/month per agent, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Amazon Lex or Zendesk Answer Bot?
Amazon Lex has a free tier; the other does not. Paid plans start at Free for Amazon Lex and $55/month per agent for Zendesk Answer Bot.
Does Amazon Lex or Zendesk Answer Bot run on more platforms?
Amazon Lex runs on Web, AWS Cloud. Zendesk Answer Bot runs on Web, Email, Slack, Mobile.
Can I use Amazon Lex for free?
Yes. Amazon Lex has a free tier, so you can try it without paying. Zendesk Answer Bot starts at $55/month per agent.
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 Zendesk Answer Bot is typically brought in for.
What can Amazon Lex do that Zendesk Answer Bot cannot?
Amazon Lex covers Speech recognition, Natural language understanding, Voice and text, Lambda integration. Zendesk Answer Bot covers AI chatbot, Knowledge base integration, Intent recognition, Multi-language support. Both handle Web support, Mobile 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
Zendesk Answer Bot: Is Answer Bot included in my Zendesk plan?

Answer Bot functionality is now part of Zendesk AI agents included in Suite and Support plans, though Advanced AI features require the Advanced AI add-on. Legacy Essential tier Answer Bot was sunset on December 31, 2026.

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
Zendesk Answer Bot: What channels does Answer Bot support?

Answer Bot works in email autoresponses, Slack channels (free feature for Guide Enterprise or Professional plans), and the web widget. For Slack, it listens to selected channels and suggests relevant Help Center articles to users.

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
Zendesk Answer Bot: Does Answer Bot generate complete answers or just suggest articles?

Classic Answer Bot primarily suggests articles from your Help Center that might solve the issue, leaving the customer to read the article themselves. It does not generate a full response or summarize the article content.

Source
Zendesk Answer Bot: How is Answer Bot usage billed?

As of 2026, Zendesk charges for AI agent features using an automated resolutions model rather than monthly active users. The specific per-resolution pricing varies by plan and was transitioning during 2026.

Source
Share

Related pages

More on Amazon Lex

More on Zendesk Answer Bot

Keep looking

Other head to heads