Fly.io is a popular global application platform used to deploy full-stack apps and databases as Firecracker microVMs in 35+ regions — but as infrastructure, it has no built-in WCAG accessibility audit, no Core Web Vitals scoring, and no front-end health monitoring for the applications it hosts. PageGuard audits the live URL of any Fly.io-deployed application externally — free, no flyctl access 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 universities that deploy applications on Fly.io face this compliance deadline. Fly.io’s rolling deploy workflow means every flyctl deploy can push accessibility-regressed front-end code to 35+ global regions simultaneously — React component updates, CSS changes, and npm package upgrades can introduce WCAG violations across all regions at once without any automated quality gate. PageGuard provides continuous post-deployment front-end monitoring without requiring flyctl access or code changes.
| Feature | PageGuard | Fly.io |
|---|---|---|
| What is it? | External website health monitor — scans any URL for performance, accessibility, SEO, and best practices | Global application platform that runs full-stack apps and databases close to users via lightweight Firecracker microVMs — deploy Docker containers, Postgres, Redis, and Fly Machines worldwide; 35+ regions; used as a popular Heroku alternative for full-stack applications, APIs, and stateful workloads |
| Free tier | ✓ Yes — unlimited one-off scans, no signup required | Free allowance: 3 shared-CPU VMs (256 MB RAM each), 3 GB persistent volume storage, 160 GB outbound data transfer per month; Postgres and Redis available on paid plans; no free tier for production workloads requiring high availability; credit card required to deploy beyond hobby limits |
| Accessibility audit (WCAG / ADA) | ✓ Yes — WCAG 2.1 AA scored 0–100 with specific issue list | No — Fly.io is a cloud application platform; it runs your application containers but has no built-in WCAG or ADA accessibility auditing for the front-end HTML output of applications deployed on it; accessibility quality is entirely determined by the application code, front-end framework, and HTML templates developers deploy |
| Technical SEO audit | ✓ Yes — meta tags, headings, canonical, structured data | No — Fly.io handles infrastructure, global routing, and container orchestration but provides no SEO audit scores, meta tag validation, heading hierarchy checks, or structured data analysis for applications running on its platform; developers are responsible for all SEO implementation |
| Performance audit (Core Web Vitals) | ✓ Yes — LCP, CLS, FCP scored 0–100 per scan | No — Fly.io provides infrastructure metrics (CPU, memory, network latency, request rates) via its metrics dashboard and Prometheus integration, but has no Core Web Vitals measurement (LCP, CLS, FCP, INP) for front-end rendering performance of deployed applications |
| Global application hosting | No — PageGuard is a monitoring tool, not a hosting platform | ✓ Yes — Fly.io deploys Docker containers as Firecracker microVMs in 35+ global regions; automatic TLS via Let's Encrypt, Anycast networking, geographic request routing, rolling deployments, health checks, autoscaling, and persistent volumes; supports Node.js, Python, Go, Ruby, Rust, Elixir, and any Dockerfile |
| Managed databases | No — PageGuard is a monitoring tool, not a database service | ✓ Yes — Fly Postgres (self-managed PostgreSQL on Fly infrastructure), Fly Redis (Upstash), Tigris object storage, and LiteFS distributed SQLite; databases deployed as Fly apps in any region with low-latency access from co-located application VMs |
| Automated website monitoring | ✓ Yes — weekly or daily scans with email alerts on score drop | No — Fly.io is a cloud application platform; it has no post-deployment health monitoring for WCAG compliance, Core Web Vitals regressions, SEO quality changes, or front-end best practices for applications it hosts; Fly health checks monitor VM liveness and readiness, not front-end quality |
| AI-generated plain-English report | ✓ Yes — explains issues in non-technical language | No — no front-end health report for apps running on Fly.io |
| ADA Title II compliance monitoring | ✓ Yes — WCAG audit + alert on accessibility regression | No — Fly.io does not audit or alert on WCAG compliance for applications it hosts; common accessibility issues in Fly-deployed applications include React/Vue/Angular SSR hydration mismatches causing dynamic ARIA attributes to differ between server-rendered and client-hydrated HTML, geographic region differences causing variable load times that affect focus management timing, and multi-region active-active database deployments where cached HTML versions may serve stale accessibility-regressed content — all requiring external runtime validation |
| Works on any platform | ✓ Yes — scans any URL on any front-end or platform | No — Fly.io runs your own deployed applications; it does not audit sites built on other hosting platforms |
| Independent external audit | ✓ Yes — third-party scan, shareable URL for clients/stakeholders | No — no built-in tool to generate a shareable external health report for a Fly.io-deployed application |
| Instant on-demand scan | ✓ Yes — results in 30 seconds, no code changes needed | No — no on-demand front-end health scan; auditing Fly.io-deployed applications requires separate tools like Lighthouse or axe after deployment |
| Multi-site dashboard | ✓ Yes — 1–50 sites depending on plan | Fly.io manages individual applications and organizations; there is no health monitoring dashboard showing accessibility, SEO, and performance scores across multiple Fly-deployed applications |
| Pricing for health monitoring | ✓ Free + from $9/mo for automated monitoring | Health monitoring not available — Fly.io is a cloud application platform, not a website health monitoring tool |
flyctl deploy to catch accessibility and SEO regressions across all deployed regionsflyctl deployGet WCAG accessibility scores and Core Web Vitals for any Fly.io-deployed application or static site. Results in 30 seconds. No Fly account, flyctl CLI, or Docker access required.
Results in ~30 seconds. 4 scores: Performance, Accessibility, SEO, Best Practices.
Yes — PageGuard scans the live URL of any Fly.io application, whether on a fly.dev subdomain or custom domain. Enter the public URL and receive a full health report in ~30 seconds covering Core Web Vitals, WCAG 2.1 AA accessibility, technical SEO, and best practices. No Fly account, flyctl CLI, or Docker access is required.
No — Fly.io is a cloud application platform with no built-in WCAG compliance checking. It runs your application containers but does not audit the front-end HTML output for accessibility issues. Common problems include SSR hydration mismatches, missing alt text on dynamically loaded images, improper heading hierarchy in React or Vue components, insufficient color contrast, and keyboard navigation gaps in SPAs. PageGuard audits your live application and provides a WCAG 2.1 AA score with specific issues to fix.
Fly.io’s rolling deployment workflow means every flyctl deploy pushes code changes to all regions simultaneously without any automated front-end quality gate. Government agencies, nonprofits, and universities face ADA Title II compliance requirements with an April 24, 2026 deadline. Multi-region deployments also mean that caching, CDN edge nodes, or regional differences can cause front-end accessibility to vary by geography. PageGuard provides continuous monitoring with email alerts when WCAG scores drop.
No — they serve completely different purposes. Fly.io is a global cloud application platform that runs Docker containers as Firecracker microVMs in 35+ regions with managed databases and networking. PageGuard is an external quality monitoring tool for the front-end output of those deployed applications. Teams using Fly.io should add PageGuard to continuously verify WCAG compliance, Core Web Vitals, and SEO quality after each deployment.