KTM Cost Analysis

Architecture Overview

This cost analysis covers a complete serverless application stack on AWS with:

AWS Lambda for compute
API Gateway for REST APIs
S3 for static website hosting
CloudFront for content delivery
Cognito for user authentication
WAF for web application security

Detailed Service Cost Breakdown

1. AWS Lambda Costs

Pricing Factors:

Execution time: $0.0000166667 per GB-second
Requests: $0.20 per 1M requests
Memory allocation: You pay for configured memory, not actual usage

2. API Gateway Costs

REST API Pricing:

$1.00 per million API calls
$0.09 per GB data transfer out

HTTP API Pricing (cheaper alternative):

$0.80 per million requests
$0.06 per GB data transfer out

3. S3 Static Website Hosting Costs

Pricing Factors:

Storage: $0.023 per GB/month (standard storage)
Requests: $0.0004 per 1,000 GET requests
Data transfer: $0.09 per GB out to internet

5. AWS WAF Costs

Pricing Factors:

$0.60 per web ACL per month
$0.60 per rule per month
$1.00 per million requests processed
Additional charges for Bot Control and Fraud Control features

Organization Size Cost Estimates

Small Business

10-500 employees

$50 - $500/month

50,000 - 500,000 MAUs
5-50GB storage
1-10M Lambda invocations
Basic WAF protection
Email authentication

Example Monthly Cost:

Service	Cost
Lambda	$10 - $100
API Gateway	$10 - $100
S3 + CloudFront	$20 - $200
Cognito	$0 - $250 (first 50k MAUs free)
WAF	$10 - $50
Total	$50 - $500

Medium Enterprise

500-25,000 employees

$500 - $5,000/month

500,000 - 5M MAUs
50-500GB storage
10-100M Lambda invocations
Advanced WAF protection
SMS/Email authentication

Example Monthly Cost:

Service	Cost
Lambda	$100 - $1,000
API Gateway	$100 - $1,000
S3 + CloudFront	$200 - $2,000
Cognito	$250 - $2,500
WAF	$50 - $500
Total	$500 - $5,000

Large Enterprise

25,000+ employees

$5,000+/month

5M+ MAUs
500GB+ storage
100M+ Lambda invocations
Enterprise WAF with Bot Control
Multi-factor authentication

Example Monthly Cost:

Service	Cost
Lambda	$1,000+
API Gateway	$1,000+
S3 + CloudFront	$2,000+
Cognito	$2,500+
WAF	$500+
Total	$5,000+

Cost Comparison Chart

Service	Small Business	Medium Enterprise	Large Enterprise
Lambda	$10 - $100	$100 - $1,000	$1,000+
API Gateway	$10 - $100	$100 - $1,000	$1,000+
S3 + CloudFront	$20 - $200	$200 - $2,000	$2,000+
Cognito	$0 - $250	$250 - $2,500	$2,500+
WAF	$10 - $50	$50 - $500	$500+
Total	$50 - $500	$500 - $5,000	$5,000+

Kryotech Software Solution

Architecture Overview

Detailed Service Cost Breakdown

1. AWS Lambda Costs

2. API Gateway Costs

3. S3 Static Website Hosting Costs

4. Amazon Cognito Costs

5. AWS WAF Costs

Organization Size Cost Estimates

Small Business

Example Monthly Cost:

Medium Enterprise

Example Monthly Cost:

Large Enterprise

Example Monthly Cost:

Cost Comparison Chart

Free Tier Availability

Service	Free Tier Limit
Lambda	1M free requests/month
API Gateway	1M REST API calls/month
S3	5GB storage, 20,000 GET requests
Cognito	50,000 MAUs free
WAF	1 web ACL, 10 rules (for first 12 months)