Edgio (formerly Limelight Networks) is an enterprise edge CDN with EdgeJS for JavaScript at the edge and predictive prefetching for e-commerce — but as a delivery platform it has no WCAG accessibility audit, no Core Web Vitals scoring, and no front-end quality monitoring. PageGuard audits any Edgio-delivered website externally — free, no CDN credentials needed, results in 30 seconds.
ADA Title II Deadline: April 24, 2026
Media companies, e-commerce retailers, and educational institutions using Edgio for content delivery face ADA Title II and Title III compliance requirements. Edgio caches and delivers HTML through its global edge network and can transform responses with EdgeJS — but whether the HTML implements correct alt text (WCAG 1.1.1), ARIA landmarks, keyboard navigation, or color contrast is determined entirely by the origin application. EdgeJS edge transformations do not add WCAG-compliant attributes or fix accessibility regressions introduced by origin deployments. PageGuard monitors any website delivered through Edgio for WCAG compliance without requiring CDN configuration changes or EdgeJS code modifications.
PageGuard vs Edgio — enterprise edge CDN and EdgeJS delivery platform vs deployed website quality monitoring
| Feature | PageGuard | Edgio |
|---|---|---|
| What is it? | External website health monitor — scans any deployed URL for performance, accessibility, SEO, and best practices | Edgio (formerly Limelight Networks and Layer0/Moovweb) is an edge computing and CDN platform founded in 1998 that rebranded from Limelight Networks to Edgio in 2022 after acquiring Layer0, the edge JavaScript platform originally developed by Moovweb; Edgio provides CDN delivery for media streaming and OTT video, edge computing with EdgeJS (a JavaScript runtime at the edge similar to Cloudflare Workers), predictive prefetching to accelerate e-commerce page transitions, WAF (web application firewall), bot management, and DDoS protection; Edgio served enterprise clients including media companies, retailers, and e-commerce platforms before filing for Chapter 11 bankruptcy protection in October 2023; Edgio does not analyze WCAG accessibility compliance, Core Web Vitals browser metrics, or technical SEO quality of the HTML it delivers through its edge network |
| Free tier | ✓ Yes — unlimited one-off scans, no signup required | Edgio does not offer a public self-serve free tier for ongoing CDN or edge computing services; Edgio's services are enterprise-grade and involve custom contract pricing based on traffic volume, geographic requirements, and service tier; access to Edgio's CDN, EdgeJS runtime, WAF, or predictive prefetching capabilities requires a paid plan; at no price tier does Edgio include WCAG accessibility auditing, Core Web Vitals measurement, or technical SEO analysis of the HTML content it delivers |
| Accessibility audit (WCAG / ADA) | ✓ Yes — WCAG 2.1 AA scored 0–100 with specific issue list | No — Edgio is a CDN and edge computing platform whose function is to cache and deliver web content from edge nodes globally and execute JavaScript at the edge for personalization and prefetching; it performs no analysis of the HTML body content for WCAG 2.1 accessibility compliance; Edgio's EdgeJS runtime can transform responses at the edge (A/B testing, personalization, header injection) — but EdgeJS has no built-in WCAG compliance checking for alt text (WCAG 1.1.1), ARIA landmark structure (WCAG 1.3.1), keyboard navigability (WCAG 2.1.1), or color contrast ratios (WCAG 1.4.3); the WCAG accessibility quality of pages served through Edgio is determined entirely by the origin application code, not the edge delivery layer |
| Technical SEO audit | ✓ Yes — meta tags, headings, canonical, structured data | No — Edgio provides no SEO audit of the HTML content it caches and delivers; Edgio's predictive prefetching accelerates page load times in e-commerce applications by preloading likely-next-click pages at the edge, which can improve Core Web Vitals in real-user measurement — but Edgio performs no analysis of meta title quality, canonical URL correctness, heading hierarchy, structured data validity (JSON-LD), or any other on-page or technical SEO element; EdgeJS transformations at the edge do not include SEO quality analysis of the HTML content they manipulate |
| Performance audit (Core Web Vitals) | ✓ Yes — LCP, CLS, FCP scored 0–100 per scan | No — Edgio does not directly measure browser-side Core Web Vitals (LCP, CLS, FCP, INP) for websites it serves; Edgio's predictive prefetching and edge caching reduce TTFB and improve LCP in real-user measurement for e-commerce applications — but Edgio provides no built-in Core Web Vitals measurement, browser performance benchmarking, or client-side performance scoring dashboard; Core Web Vitals are browser-side rendering metrics that depend on frontend JavaScript execution, image loading, layout stability, and rendering pipeline performance — factors determined by the application code, not Edgio's edge delivery infrastructure |
| Edge CDN with predictive prefetching | No — PageGuard is an external monitoring tool, not a content delivery network | ✓ Yes — Edgio provides a global CDN for media streaming and e-commerce delivery, with EdgeJS enabling JavaScript execution at the edge for response transformation, A/B testing, and personalization; Edgio's predictive prefetching analyzes user navigation patterns to preload likely-next-click pages at the edge before the user clicks, significantly reducing perceived page load times in e-commerce product browsing; Edgio's WAF and bot management protect applications from web exploits, credential stuffing, and scraping; media companies use Edgio for OTT video streaming delivery |
| Automated website monitoring | ✓ Yes — weekly or daily scans with email alerts on score drop | No — Edgio does not perform automated front-end quality monitoring of WCAG compliance, Core Web Vitals, or SEO quality for the content it delivers; Edgio provides CDN analytics covering bandwidth consumption, cache hit ratios, edge node traffic, WAF event logs, and bot detection reports — these are CDN operations and security metrics for delivery engineers, not front-end quality audits; Edgio generates no alerts when cached content has WCAG violations, SEO issues, or accessibility regressions after origin deployments push new page versions |
| AI-generated plain-English report | ✓ Yes — explains issues in non-technical language | No — Edgio provides no AI-generated health report or plain-English explanation of accessibility, SEO, or Core Web Vitals issues found on websites it delivers; Edgio's analytics and dashboards track CDN delivery performance, WAF events, and edge computing metrics for engineers managing delivery infrastructure — not client-facing quality reports for ADA compliance officers, SEO managers, or accessibility auditors |
| ADA Title II compliance monitoring | ✓ Yes — WCAG audit + alert on accessibility regression | No — Edgio does not audit or alert on WCAG compliance for the HTML it caches and delivers; media companies, e-commerce retailers, and educational institutions using Edgio for content delivery face ADA Title II and Title III compliance requirements; Edgio caches and serves their HTML through its global edge network — but whether the HTML implements correct alt text (WCAG 1.1.1), keyboard navigation (WCAG 2.1.1), ARIA roles (WCAG 4.1.2), or sufficient color contrast (WCAG 1.4.3) is determined entirely by the origin application code; EdgeJS edge transformations do not add WCAG-compliant alt text, fix heading hierarchy, or validate structured data; the ADA Title II deadline of April 24, 2026 applies to covered entities regardless of their CDN or edge computing provider |
| Works on any deployed platform | ✓ Yes — scans any URL on any hosting or platform | Edgio delivers content for websites hosted on any origin infrastructure connected to its edge network; it does not scan or monitor the front-end quality of the content it delivers; PageGuard audits any public URL regardless of whether it is served directly or through Edgio's CDN, behind any other edge platform, or through any delivery infrastructure |
| Independent external audit | ✓ Yes — third-party scan, shareable URL for clients/stakeholders | No — Edgio provides no built-in tool to generate a shareable external front-end health report for websites it delivers; Edgio's analytics and WAF dashboards track CDN operations, security events, and edge computing metrics for delivery engineers — not shareable accessibility or SEO quality reports for clients, procurement teams, or ADA compliance auditors |
| Instant on-demand scan | ✓ Yes — results in 30 seconds, no code changes needed | No — Edgio has no on-demand front-end health scan capability; auditing a website delivered through Edgio for WCAG accessibility, Core Web Vitals, or SEO quality requires running third-party tools against the public URL; Edgio's APIs and dashboards provide CDN configuration, EdgeJS deployment, WAF management, and delivery analytics — not accessibility or quality scanning of edge-delivered HTML content |
| Multi-site dashboard | ✓ Yes — 1–50 sites depending on plan | Edgio allows multiple properties and edge deployments under a single enterprise account, each with its own CDN configuration, EdgeJS codebase, and WAF policy; there is no cross-property front-end health dashboard showing WCAG compliance scores, SEO quality, or Core Web Vitals for multiple websites delivered through Edgio |
| Pricing for health monitoring | ✓ Free + from $9/mo for automated monitoring | Front-end health monitoring not available at any tier — Edgio: custom enterprise pricing based on traffic volume and service requirements; no public self-serve pricing; no WCAG accessibility monitoring, Core Web Vitals scoring, or SEO audit included at any price point |
Get a full WCAG accessibility, Core Web Vitals, and SEO report in 30 seconds — free, no Edgio account access, CDN credentials, or EdgeJS configuration required.
Yes — PageGuard scans any public URL regardless of the CDN or edge platform serving it, including websites delivered through Edgio's global edge network. Paste the public URL of your Edgio-delivered site into PageGuard for a full health report covering WCAG 2.1 AA accessibility, Core Web Vitals performance, technical SEO quality, and best practices in about 30 seconds. No Edgio account access, CDN credentials, or EdgeJS configuration required.
No — Edgio (formerly Limelight Networks) is a CDN and edge computing platform that caches and delivers web content from global edge nodes and executes JavaScript at the edge with EdgeJS. It performs no analysis of the HTML body content for WCAG accessibility compliance. Edgio's EdgeJS runtime can transform responses at the edge, but has no built-in WCAG compliance checking for alt text quality, ARIA landmark structure, keyboard navigability, or color contrast. Detecting WCAG violations on a website delivered through Edgio requires an external audit tool like PageGuard.
Yes — websites delivered through Edgio face the same WCAG and ADA compliance requirements as any other website. Edgio delivers HTML through its global edge network and can transform responses with EdgeJS — but cannot enforce that the HTML implements correct alt text, ARIA roles, keyboard navigation, or color contrast. Media companies, retailers, and educational institutions using Edgio for content delivery face ADA Title II compliance requirements with an April 24, 2026 deadline. PageGuard detects these issues by auditing the live rendered HTML of any public URL.
No — they serve completely different purposes. Edgio is a CDN and edge computing platform providing media streaming delivery, EdgeJS JavaScript at the edge, predictive prefetching for e-commerce, WAF, bot management, and DDoS protection — the infrastructure layer that delivers and transforms web content. PageGuard is an external quality monitoring tool that audits deployed web pages for WCAG accessibility compliance, Core Web Vitals performance, and technical SEO quality. Organizations using Edgio for content delivery should also use PageGuard to verify that their delivered HTML meets WCAG requirements.