Supabase is an open-source Firebase alternative built on Postgres, bundling a database, authentication, storage, and real-time subscriptions into one developer platform — widely adopted because it gives teams a full Postgres database (rather than Firebase's NoSQL model) with a similarly fast setup experience. Our engine detects Supabase through 2 script patterns, 2 HTML patterns, and 1 CDN domain tied to its client SDK's API-request conventions and asset delivery. Supabase can be self-hosted or used via its managed cloud; detection doesn't distinguish between the two. Documented at supabase.com.
Detect Supabase Websites — Free Tool
Enter any URL to check if it was built with Supabase. Instant results, no account required.
How we detect Supabase — see our methodology: AI Influence Score calculation, evidence tiers, and fingerprint signal types.
How to Detect Supabase Websites
Script Patterns
2 patterns
CDN Domains
1 patterns
HTML Patterns
2 patterns
1. Check the Page Source
Open the website in your browser, right-click, and select "View Page Source". Search for supabase-specific patterns in the HTML.
2. Look for Script Files
Check the Network tab in DevTools for JavaScript files loaded from Supabase domains.
3. Check CDN Domains
Network requests to these CDN domains indicate a Supabase site:
supabase\.co4. Use AI Website Detector (Easiest)
Our automated scanner checks all these signals at once and gives you an instant confidence score. Just enter any URL above.
Frequently Asked Questions
Is this website built with Supabase?
You can detect if any website was built with Supabase by using our free scanner above. Just enter the URL and we'll analyze HTML patterns, JavaScript files, CDN domains, and HTTP headers to determine if Supabase was used — with a confidence score.
How to detect if a website was built with Supabase?
There are several ways to detect Supabase: (1) View the page source and look for Supabase-specific class names or script URLs, (2) Check the Network tab in DevTools for requests to Supabase CDN domains, (3) Use our free tool — we check 5 detection signals automatically.
What websites are built with Supabase?
Supabase is used by thousands of websites worldwide. Our scanner has detected many Supabase-built sites across different industries. You can scan any URL to check if it uses Supabase.
How accurate is the Supabase detection?
Our Supabase detection engine checks 5 unique fingerprint signals, achieving high confidence results. We score each match and return a confidence percentage so you know how certain the detection is.
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Detection Info
- Category
- Database
- Signals Used
- 5 patterns
- Accuracy
- High
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