Is Amazon Lex or Heap better?

Neither clearly leads. Amazon Lex starts at $0.00075/per text request and Heap at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.

Which is cheaper, Amazon Lex or Heap?

Heap has a free tier; the other does not. Paid plans start at $0.00075/per text request for Amazon Lex and Free for Heap.

Does Amazon Lex or Heap run on more platforms?

Amazon Lex runs on Web, AWS Cloud. Heap runs on Web, iOS, Android.

Can I use Heap for free?

Yes. Heap has a free tier, so you can try it without paying. Amazon Lex starts at $0.00075/per text request.

What is Amazon Lex best used for?

Amazon Lex is most often used for building conversational chatbots leveraging alexa deep learning engine, voice and text-based nlu applications requiring automatic speech recognition, custom conversational interfaces integrated into existing applications. Of those, building conversational chatbots leveraging alexa deep learning engine and voice and text-based nlu applications requiring automatic speech recognition are not what Heap is typically brought in for.

What can Amazon Lex do that Heap cannot?

Amazon Lex covers Speech recognition, Natural language understanding, Voice and text, Lambda integration. Heap covers Autocapture, Retroactive analytics, Session replay, Funnel analysis.

Live Chat & Chatbots · head to head

Amazon Lex vs Heap

Amazon Lex

Live Chat & Chatbots

AWS conversational AI service

From: $0.00075/per text request
Rated: -

Full review Website

Heap

SaaS

Product analytics for the modern product team

From: Free
Rated: -

Full review Website

The short version

Only Heap 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); Heap no built-in A/B testing or feature flags; requires integration with separate tools for experimentation
They diverge on capability: Amazon Lex covers Speech recognition, Heap covers Autocapture.

Where they differ

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

Attributes where Amazon Lex and Heap differ
Attribute	Amazon Lex	Heap
Starting price	$0.00075/per text request	Free
Pricing model	usage-based	Unknown
Free tier	No	Yes
Platforms	Web, AWS Cloud	Web, iOS, Android
Category	Live Chat & Chatbots	SaaS
Founded	2006	2013

Identical on both: user rating (Not yet rated).

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 Heap

Autocapture
Retroactive analytics
Session replay
Funnel analysis
User segmentation
Path analysis
Data science
Virtual events

What people use each for

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

Amazon Lex

Building conversational chatbots leveraging Alexa deep learning enginenot Heap
Voice and text-based NLU applications requiring automatic speech recognitionnot Heap
Custom conversational interfaces integrated into existing applicationsnot Heap

Heap

User behavior analysisnot Amazon Lex
Conversion optimizationnot Amazon Lex
Product adoptionnot Amazon Lex
Customer journey mappingnot Amazon Lex
A/B testing analysisnot 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

Heap

No built-in A/B testing or feature flags; requires integration with separate tools for experimentation
Group analytics and advanced features require a sales conversation, not self-serve
Cloud-only deployment; no self-hosted option for data security or compliance requirements
Session replay lacks developer debugging tools compared to PostHog
Pricing for Growth and Pro plans requires direct sales contact; no transparency on how pricing scales

Pricing, plan by plan

Amazon Lex

$0.00075/per text request

No published plan breakdown. See the Amazon Lex review.

Heap

Free

FreeFree
- Up to 10,000 monthly sessions
- Basic charts
- 6 months data history
Growth$undefined/custom
- Custom session pricing
- Sense AI assistant
- 12 months data history
Pro$undefined/custom
- Custom session pricing
- Account analytics
- Engagement matrix
Premier$undefined/custom
- Custom session pricing
- Data warehouse integration
- Unlimited projects

Which should you pick?

Choose Amazon Lex if

You need speech recognition.
You work on Web, AWS Cloud.
You also want natural language understanding.

Amazon Lex review

Choose Heap if

You need autocapture.
You want to start without paying.
You work on Web, iOS, Android.
You also want retroactive analytics.

Heap review

Questions people ask

Is Amazon Lex or Heap better?: Neither clearly leads. Amazon Lex starts at $0.00075/per text request and Heap at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Amazon Lex or Heap?: Heap has a free tier; the other does not. Paid plans start at $0.00075/per text request for Amazon Lex and Free for Heap.
Does Amazon Lex or Heap run on more platforms?: Amazon Lex runs on Web, AWS Cloud. Heap runs on Web, iOS, Android.
Can I use Heap for free?: Yes. Heap has a free tier, so you can try it without paying. Amazon Lex starts at $0.00075/per text request.
What is Amazon Lex best used for?: Amazon Lex is most often used for building conversational chatbots leveraging alexa deep learning engine, voice and text-based nlu applications requiring automatic speech recognition, custom conversational interfaces integrated into existing applications. Of those, building conversational chatbots leveraging alexa deep learning engine and voice and text-based nlu applications requiring automatic speech recognition are not what Heap is typically brought in for.
What can Amazon Lex do that Heap cannot?: Amazon Lex covers Speech recognition, Natural language understanding, Voice and text, Lambda integration. Heap covers Autocapture, Retroactive analytics, Session replay, Funnel analysis.

Answered from the vendors’ own pages

Heap: What does Heap's autocapture feature do?

Heap's autocapture is a single code snippet that automatically captures every click, swipe, tap, pageview, and form fill on your website and apps without requiring manual event setup. Once installed, Heap captures the entire digital experience of every user on every platform with no ongoing engineering maintenance needed.

Source

Heap: What are Heap's pricing plans and how much do they cost?

Heap offers a Free plan for up to 10,000 monthly sessions. Growth, Pro, and Premier plans use custom session-based pricing that requires contacting sales for a quote. Free includes basic charts and 6 months data history. Growth adds the Sense AI assistant. Pro adds account analytics. Premier adds data warehouse integration and dedicated customer success management.

Source

Heap: Does Heap include session replay and A/B testing?

Heap includes integrated session replay showing exactly what users did on your site. However, Heap does not include built-in A/B testing or feature flags. Teams requiring these capabilities must use separate tools or integrate with third-party platforms.

Source

Heap: What integrations does Heap support?

Heap supports over 100 integrations connecting to business tools including marketing platforms, CRMs, and data warehouses. This allows insights to reach relevant teams and ensures data flows to other business systems automatically.

Source

Heap: Does Heap offer self-hosting or is it cloud-only?

Heap is cloud-only and does not offer self-hosted options. Organizations requiring on-premises deployment should consider alternatives like PostHog which supports self-hosting alongside its cloud product.

Source

Heap: What is Sense and how does it help with analytics?

Sense Chat is Heap's AI assistant that enables users to access analytics without extensive technical knowledge. It allows teams to ask questions about user behavior and get answers directly without lengthy onboarding or technical expertise, making insights more accessible to non-technical stakeholders.

Source

Amazon Lex vs Heap

Amazon Lex

Heap

The short version

Where they differ

What each one covers

Only in Amazon Lex

Only in Heap

What people use each for

Amazon Lex

Heap

Where each one falls short

Amazon Lex

Heap

Pricing, plan by plan

Amazon Lex

Heap

Which should you pick?

Choose Amazon Lex if

Choose Heap if

Questions people ask

Answered from the vendors’ own pages

Related pages

More on Amazon Lex

More on Heap

Keep looking

Other head to heads