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Amazon Lex vs Conversica

Amazon Lex logo

Amazon Lex

Live Chat

AWS conversational AI service

From
Free
Rated
-
Full reviewWebsite
Conversica logo

Conversica

Live Chat

AI-powered conversational platform for sales and customer service

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); Conversica no pricing published on website
  • They diverge on capability: Amazon Lex covers Speech recognition, Conversica covers Conversational AI.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Amazon Lex and Conversica actually diverge.

Attributes where Amazon Lex and Conversica differ
AttributeAmazon LexConversica
Starting priceFreeOn request
Pricing modelusage-basedsubscription
Free tierYesNo
PlatformsWeb, AWS CloudWeb, Email, SMS, Messaging apps
Founded20062009

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 Conversica

  • Conversational AI
  • Lead nurturing
  • Customer engagement
  • Intent analysis
  • Salesforce
  • HubSpot
  • Microsoft Dynamics
  • Zapier

Both cover

  • Web support

What people use each for

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

Amazon Lex

  • Chatbot developmentnot Conversica
  • Voice-based conversational AInot Conversica
  • Natural language understandingnot Conversica

Conversica

  • 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

Conversica

  • No pricing published on website
  • Requires demo request to obtain pricing
  • Custom pricing model with no self-service options
  • Contact sales required for plan details

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

Conversica

On request
  • Starter$200/month
    • AI conversations
    • Lead nurturing
  • Professional$500/month
    • Advanced automation
    • Custom flows
  • Enterprise$undefined/month
    • Full customization
    • 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 Conversica if

  • You need conversational ai.
  • You work on Web, Email, SMS, Messaging apps.
  • You also want lead nurturing.
Conversica review

Questions people ask

Is Amazon Lex or Conversica better?
Neither clearly leads. Amazon Lex starts at Free and Conversica at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Amazon Lex or Conversica?
Amazon Lex has a free tier; the other does not. Paid plans start at Free for Amazon Lex and On request for Conversica.
Does Amazon Lex or Conversica run on more platforms?
Amazon Lex runs on Web, AWS Cloud. Conversica runs on Web, Email, SMS, Messaging apps.
Can I use Amazon Lex for free?
Yes. Amazon Lex has a free tier, so you can try it without paying. Conversica 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 Conversica is typically brought in for.
What can Amazon Lex do that Conversica cannot?
Amazon Lex covers Speech recognition, Natural language understanding, Voice and text, Lambda integration. Conversica covers Conversational AI, Lead nurturing, Customer engagement, Intent analysis. 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
Conversica: How much does Conversica cost?

Conversica does not publish pricing on their website. To obtain pricing information, request a demo through their contact form or contact the sales team directly.

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
Conversica: What is Conversica's pricing model?

Conversica uses a custom pricing model requiring direct sales engagement. Interested companies can request a demo or contact their sales team to discuss pricing based on specific needs.

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
Conversica: Does Conversica offer different plan tiers?

While specific plan names are referenced on the website, details are only available by requesting a demo or contacting their sales team for a pricing consultation.

Source
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