AWS Lambda is Amazon’s serverless compute platform powering API backends and web applications — but as a compute service it has no WCAG accessibility audit, no Core Web Vitals scoring, and no post-deployment front-end quality monitoring. PageGuard audits any Lambda-powered website externally — free, no AWS credentials needed, results in 30 seconds.
ADA Title II Deadline: April 24, 2026
State and local government websites must meet WCAG 2.1 AA by April 24, 2026. Government agencies, nonprofits, and educational institutions using Lambda-powered backends (API Gateway + Lambda, Next.js on Lambda, serverless SSR) for public-facing websites face this compliance deadline. Lambda function deployments via SAM, CDK, or Serverless Framework can push HTML template changes and API response modifications to production in seconds — silently introducing accessibility regressions without any WCAG quality gate. PageGuard provides continuous post-deployment monitoring of the live application URL without requiring AWS credentials or IAM access.
| Feature | PageGuard | AWS Lambda |
|---|---|---|
| What is it? | External website health monitor — scans any deployed URL for performance, accessibility, SEO, and best practices | AWS Lambda is Amazon's serverless compute service that runs code in response to events without provisioning or managing servers; executes functions in response to HTTP requests (via API Gateway or Function URLs), S3 events, DynamoDB streams, SQS messages, scheduled CloudWatch Events, and 200+ other AWS service triggers; supports Node.js, Python, Java, Go, Ruby, .NET, and custom runtimes; scales from zero to tens of thousands of concurrent executions automatically; pay only for compute time consumed — $0.20 per 1 million requests and $0.00001667 per GB-second; 1 million free requests and 400,000 GB-seconds per month always free; used for REST/GraphQL API backends, image/video processing, data transformation, webhooks, and serverless web applications when combined with S3+CloudFront for the frontend |
| Free tier | Yes — unlimited one-off scans, no signup required | Yes — AWS Lambda always-free tier: 1 million function requests and 400,000 GB-seconds of compute time per month permanently free (not just 12 months); beyond free tier: $0.20 per 1 million requests and $0.00001667 per GB-second; no front-end quality monitoring at any tier |
| Accessibility audit (WCAG / ADA) | ✓ Yes — WCAG 2.1 AA scored 0–100 with specific issue list | No — AWS Lambda is a serverless compute service with no built-in WCAG or ADA accessibility auditing for web applications it powers; Lambda executes server-side code and returns API responses, HTML templates, or data — it has no awareness of the WCAG accessibility quality of the HTML ultimately rendered in a user's browser; ARIA violations, color contrast failures, missing alt text, improper heading hierarchy, keyboard navigation gaps, and inaccessible form controls in Lambda-powered applications are completely invisible to Lambda; Lambda function logs in CloudWatch capture execution duration, error rates, cold start counts, and memory usage — none are front-end WCAG quality metrics; accessibility quality of a Lambda-powered web application depends entirely on the frontend code (React, Vue, Next.js, server-rendered HTML templates) consumed by users |
| Technical SEO audit | ✓ Yes — meta tags, headings, canonical, structured data | No — AWS Lambda provides no SEO audit scores, meta tag validation, heading hierarchy analysis, canonical URL checking, or structured data verification; Lambda-powered API backends return JSON, XML, or rendered HTML but have no built-in mechanism to verify on-page SEO quality of the output; Lambda@Edge can manipulate response headers for SEO purposes but provides no automated quality scoring of the resulting HTML |
| Performance audit (Core Web Vitals) | ✓ Yes — LCP, CLS, FCP scored 0–100 per scan | No — AWS Lambda provides no Core Web Vitals measurement (LCP, CLS, FCP, INP, TTFB) for web applications it powers; Lambda metrics include invocation duration (execution time for the Lambda function itself), cold start latency, concurrent executions, throttle count, and error rate — these are server-side compute metrics, not front-end user experience quality metrics; Lambda cold starts can increase TTFB for the first request after idle periods, but Lambda does not measure or report the resulting LCP, CLS, or FCP experienced by end users in their browsers; measuring production Core Web Vitals requires separate tooling like PageGuard, Chrome UX Report, or Google Search Console |
| Serverless compute / API execution | No — PageGuard is an external monitoring tool, not a compute or API platform | ✓ Yes — AWS Lambda core capability: event-driven serverless function execution scaling from zero to 10,000+ concurrent executions with no infrastructure management; supports Node.js/Python/Java/Go/Ruby/.NET/custom runtimes; synchronous invocations via API Gateway REST/HTTP API or Lambda Function URLs; async invocations via S3/SQS/SNS/EventBridge; Lambda@Edge for CloudFront-triggered edge compute; container image support up to 10 GB; 15-minute maximum execution duration; 10 GB ephemeral /tmp storage; 512 MB to 10 GB memory allocation; VPC support for private resource access; Layers for shared libraries; Provisioned Concurrency to eliminate cold starts; AWS X-Ray tracing integration; native IAM-based access control |
| Automated website monitoring | ✓ Yes — weekly or daily scans with email alerts on score drop | No — AWS Lambda does not perform automated quality monitoring of WCAG compliance, Core Web Vitals, or SEO quality for web applications it powers; CloudWatch Alarms can alert on Lambda error rate spikes, invocation throttles, and duration increases but provide no front-end quality regression detection for accessibility or SEO |
| AI-generated plain-English report | ✓ Yes — explains issues in non-technical language | No — AWS Lambda provides no AI-generated health report or plain-English explanation of front-end accessibility, SEO, or Core Web Vitals issues for applications it powers; AWS Trusted Advisor and AWS Compute Optimizer provide AI-based recommendations for Lambda infrastructure cost and performance optimization (right-sizing memory, identifying under-utilized functions), not front-end HTML quality analysis |
| ADA Title II compliance monitoring | ✓ Yes — WCAG audit + alert on accessibility regression | No — AWS Lambda does not audit or alert on WCAG compliance for web applications it powers; government agencies, nonprofits, and educational institutions using Lambda-powered backends (API Gateway + Lambda REST APIs, Next.js on Lambda, serverless SSR) for public-facing web applications face ADA Title II compliance requirements with an April 24, 2026 deadline; Lambda function updates that modify HTML templates or API response payloads can silently introduce accessibility regressions in the rendered frontend without any WCAG quality gate; Lambda deployment via SAM, CDK, or Serverless Framework does not include accessibility testing as part of the release pipeline |
| Works on any deployed platform | ✓ Yes — scans any URL on any hosting or platform | AWS Lambda powers backend APIs and serverless applications within the AWS ecosystem; it does not scan or monitor front-end quality for websites hosted on any platform; Lambda Function URLs and API Gateway endpoints serve API responses, not the full front-end HTML quality experience seen by end users |
| Independent external audit | ✓ Yes — third-party scan, shareable URL for clients/stakeholders | No — AWS Lambda provides no built-in tool to generate a shareable external front-end health report for web applications it powers; Lambda console, CloudWatch Logs, and X-Ray traces show function execution details, error stacks, and performance traces for server-side compute — not WCAG accessibility scores or SEO quality scores shareable with clients, procurement teams, or compliance auditors |
| Instant on-demand scan | ✓ Yes — results in 30 seconds, no code changes needed | No — no on-demand front-end health scan of web applications built on AWS Lambda; auditing a Lambda-powered web application for WCAG accessibility, Core Web Vitals, or SEO quality requires running separate third-party tools (PageGuard, Lighthouse, axe) against the public application URL after deployment; Lambda itself has no concept of scanning the HTML quality of the application endpoints it services |
| Multi-site dashboard | ✓ Yes — 1–50 sites depending on plan | AWS Lambda console shows all functions with their runtime, memory, timeout, and recent invocation metrics; there is no cross-function health dashboard showing WCAG compliance, SEO quality, or Core Web Vitals for web applications powered by Lambda functions |
| Pricing for health monitoring | ✓ Free + from $9/mo for automated monitoring | Health monitoring not available — Lambda pricing: always-free 1M requests/month + 400K GB-seconds/month; beyond free tier: $0.20/1M requests + $0.00001667/GB-second; API Gateway HTTP API: $1.00/1M requests first 300M/month, then $0.90/1M; Lambda@Edge: $0.60/1M requests + $0.00000625001/GB-second; no front-end quality monitoring at any price |
Get WCAG accessibility scores and Core Web Vitals for any website built on AWS Lambda. Results in 30 seconds. No AWS account or IAM credentials required.
Results in ~30 seconds. 4 scores: Performance, Accessibility, SEO, Best Practices.
Yes — PageGuard scans any public URL regardless of the backend infrastructure. Paste your Lambda-powered application's public URL into PageGuard for a full health report covering WCAG accessibility, Core Web Vitals, SEO, and best practices in ~30 seconds. No AWS account or IAM credentials required.
No — AWS Lambda is a serverless compute service that executes backend code and has no built-in WCAG compliance checking for web applications it powers. Lambda CloudWatch metrics track invocation count, duration, cold starts, and error rates — not front-end WCAG quality. PageGuard audits the live rendered URL directly and provides a WCAG 2.1 AA score with specific issues to fix.
AWS Lambda deployments via SAM, CDK, or Serverless Framework can push code changes to production in seconds without infrastructure approval. This speed means HTML template changes or API response modifications that introduce accessibility regressions can reach users immediately without any WCAG quality gate. Government agencies, nonprofits, and educational institutions using Lambda-powered web applications face ADA Title II requirements with an April 24, 2026 deadline. PageGuard provides continuous post-deployment monitoring with email alerts when WCAG scores drop after function updates.
No — they serve completely different purposes. AWS Lambda is a serverless compute service that executes backend code, powers API endpoints, and handles server-side processing for web applications at scale. PageGuard is an external quality monitoring tool that audits the front-end HTML delivered to users for WCAG compliance, Core Web Vitals, and SEO quality. Development teams using Lambda for their application backend should add PageGuard to continuously verify front-end health at the production URL.