Supabase is an open-source Firebase alternative providing PostgreSQL database, Auth, Storage, Edge Functions, and Realtime APIs — but as a backend platform, it has no WCAG accessibility audit, no Core Web Vitals scoring, and no front-end health monitoring for applications built on it. PageGuard audits the live URL of any Supabase-powered web application externally — free, no API 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 Supabase as their backend for public-facing web applications face this compliance deadline. Supabase’s backend provides PostgreSQL data and auth APIs but has no front-end WCAG quality gate — Next.js, SvelteKit, and React frontend deployments can introduce ARIA violations, color contrast failures, and keyboard navigation regressions without any automated accessibility check. User-uploaded images stored in Supabase Storage may appear without alt text, and Supabase Auth UI must independently meet WCAG requirements. PageGuard provides continuous post-deployment front-end monitoring without requiring Supabase API credentials or database access.
| Feature | PageGuard | Supabase |
|---|---|---|
| What is it? | External website health monitor — scans any URL for performance, accessibility, SEO, and best practices | Open-source Firebase alternative built on PostgreSQL; provides Auth, Postgres database, Storage, Edge Functions, Realtime subscriptions, and Vector/AI APIs; self-hosted via Docker or available as Supabase Cloud; client SDKs for JavaScript, Python, Swift, Kotlin, Flutter, and C#; 68K+ GitHub Stars; Apache 2.0 licensed; free tier on Supabase Cloud; Pro plan from $25/month; used by Mozilla, PwC, Mazda, Resend, and thousands of startups |
| Free tier | ✓ Yes — unlimited one-off scans, no signup required | Supabase Cloud Free tier: 2 active projects, 500 MB database, 1 GB file storage, 50 MB Edge Function bundle, 5 GB bandwidth, 50K monthly active users; Pro plan from $25/month with higher limits; fully free self-hosted deployment via Docker Compose or Kubernetes; no expiry on free tier projects (paused after 1 week of inactivity) |
| Accessibility audit (WCAG / ADA) | ✓ Yes — WCAG 2.1 AA scored 0–100 with specific issue list | No — Supabase is a backend platform that provides PostgreSQL database, authentication, storage, and serverless edge functions; it provides no built-in WCAG or ADA accessibility auditing for any front-end HTML, CSS, or JavaScript output; front-end accessibility compliance is entirely determined by the React, Vue, Next.js, or SvelteKit application that consumes Supabase's backend APIs; even Supabase's own Auth UI components must be independently verified for WCAG compliance |
| Technical SEO audit | ✓ Yes — meta tags, headings, canonical, structured data | No — Supabase provides no SEO audit scores, meta tag validation, heading hierarchy analysis, canonical URL checking, or structured data verification; Supabase is a backend data and auth platform that has no awareness of how its data is rendered in the front-end HTML; all SEO is determined by the web framework and frontend code that consumes Supabase's Postgres database and APIs |
| Performance audit (Core Web Vitals) | ✓ Yes — LCP, CLS, FCP scored 0–100 per scan | No — Supabase provides no Core Web Vitals measurement (LCP, CLS, FCP, INP) for applications using its backend; Supabase database query performance, edge function execution time, and API response latency are server-side metrics that do not reflect front-end rendering performance experienced by real users in a browser |
| Backend services (Auth, DB, Storage, Functions) | No — PageGuard is a front-end quality monitoring tool | ✓ Yes — Supabase provides a complete backend platform built on PostgreSQL: Auth with email/password, magic link, phone OTP, OAuth (Google, GitHub, Apple, Discord, Spotify, etc.), SSO, and Row Level Security (RLS) for fine-grained data access; Postgres database with full SQL support, 40+ extensions (pgvector, pg_stat_statements, PostGIS), branching, and automatic backups; Storage with S3-compatible API, image transformations, and CDN; Edge Functions with Deno runtime supporting TypeScript; Realtime via WebSockets for broadcast, presence, and Postgres Change Data Capture; Vector/AI for semantic search with pgvector |
| Self-hosted open-source option | No — PageGuard is a cloud-only SaaS service | ✓ Yes — Supabase is Apache 2.0 licensed and fully self-hosted via Docker Compose, Kubernetes, or Fly.io; complete feature parity between self-hosted and cloud versions; community Helm charts for Kubernetes deployments; 68K+ GitHub Stars; no vendor lock-in for self-hosted users; all data stays in your own Postgres database |
| Automated website monitoring | ✓ Yes — weekly or daily scans with email alerts on score drop | No — Supabase monitors backend health (database performance, API response times, storage usage, edge function invocations) and provides uptime alerts but provides no automated front-end quality monitoring for WCAG compliance, Core Web Vitals regressions, SEO quality, or best practices for the rendered HTML output of web applications built on Supabase |
| AI-generated plain-English report | ✓ Yes — explains issues in non-technical language | No — no front-end health report or AI-generated accessibility analysis for applications built with Supabase; Supabase does provide AI-powered SQL editor assistance and vector search capabilities, but no accessibility reporting |
| ADA Title II compliance monitoring | ✓ Yes — WCAG audit + alert on accessibility regression | No — Supabase does not audit or alert on WCAG compliance for applications built on its backend; government agencies, nonprofits, and educational institutions using Supabase for public-facing web applications face ADA Title II compliance requirements with an April 24, 2026 deadline; Next.js and SvelteKit applications consuming Supabase APIs can introduce ARIA violations, color contrast failures, missing alt text on user-uploaded images from Supabase Storage, keyboard navigation gaps, and inaccessible form components with each frontend deployment — Supabase's backend has no front-end quality gate; Supabase Auth UI components and custom Supabase-powered forms must independently meet WCAG requirements |
| Works on any platform | ✓ Yes — scans any URL on any front-end or platform | Supabase is a backend API platform; it does not monitor or audit front-end applications built with non-Supabase backends |
| Independent external audit | ✓ Yes — third-party scan, shareable URL for clients/stakeholders | No — no built-in tool to generate a shareable external front-end health report for an application built on Supabase |
| Instant on-demand scan | ✓ Yes — results in 30 seconds, no code changes needed | No — no on-demand front-end health scan; auditing web applications that use Supabase as a backend requires separate tools like Lighthouse or axe-core after each frontend deployment |
| Multi-site dashboard | ✓ Yes — 1–50 sites depending on plan | Supabase Cloud provides a project dashboard for managing backend resources across multiple Supabase projects; there is no cross-application front-end health monitoring showing WCAG accessibility, SEO, and Core Web Vitals scores across multiple sites |
| Pricing for health monitoring | ✓ Free + from $9/mo for automated monitoring | Health monitoring not available — Supabase is a backend platform; Free tier: 2 active projects with usage limits; Pro: $25/month per project; Team: $599/month; Enterprise: custom; no front-end quality monitoring included at any tier |
Get WCAG accessibility scores and Core Web Vitals for any web application built on Supabase. Results in 30 seconds. No Supabase API keys, database credentials, or code changes required.
Results in ~30 seconds. 4 scores: Performance, Accessibility, SEO, Best Practices.
Yes — PageGuard scans the live URL of any web application that uses Supabase as its backend. Enter your app’s 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 Supabase project credentials, API keys, database access, or application code changes are required.
No — Supabase is a backend platform with no built-in WCAG compliance checking. Supabase provides PostgreSQL database, Auth, Storage, Edge Functions, and Realtime APIs but has no awareness of how its data is rendered in the front-end HTML. Common accessibility problems in Supabase-powered applications include Next.js and SvelteKit component ARIA violations, inaccessible Auth UI flows, user-uploaded images from Supabase Storage displayed without alt text, keyboard navigation gaps, and color contrast failures. PageGuard audits your live site and provides a WCAG 2.1 AA score with a specific list of issues to fix.
Supabase’s backend provides PostgreSQL data and auth APIs but has no front-end WCAG quality gate. Each frontend deployment can introduce accessibility regressions without any automated check from the Supabase backend. Government agencies, nonprofits, and educational institutions using Supabase for public-facing web applications face ADA Title II compliance requirements with an April 24, 2026 deadline. PageGuard provides continuous post-deployment accessibility monitoring with email alerts when WCAG scores drop.
No — they serve completely different purposes. Supabase is an open-source backend platform providing PostgreSQL database, Auth, Storage, Edge Functions, Realtime, and Vector APIs for building web and mobile applications. PageGuard is an external quality monitoring tool for the rendered front-end output of web applications built on backends like Supabase. Teams using Supabase as their backend should add PageGuard to continuously verify WCAG compliance, Core Web Vitals, and SEO quality of the frontend applications that consume Supabase’s APIs.