Security Headers VS AppSitter

AI builders let anyone ship a real app. Nothing in that workflow tells you when the app is leaking data, or quietly running up a database bill.

AppSitter is the watch service for exactly that gap.

FREE URL SCAN, NO ACCOUNT Paste your live URL and see what the outside world can already see: API keys shipped in the JS bundle, database tables that answer anonymous requests, missing security headers, cookie flags, source maps left in production. A few seconds, no sign-up.

DEEP SCAN VIA GITHUB Connect the repo and AppSitter reads your migrations and reconciles row-level security across all of them rather than just the last one, then probes your live database with your public key the way an attacker would. It also checks your dependencies against published advisories, your storage buckets, and your email DNS (SPF/DMARC).

THE OUTPUT IS A FIX, NOT A REPORT Every finding arrives in plain English with a copy-paste prompt written for the builder that produced your app: Lovable, Bolt, v0, Cursor or Replit. It also generates guardrail files (AGENTS.md, Cursor rules, Lovable Knowledge) so your AI stops reintroducing the same class of bug.

IT KEEPS WATCHING Paid tiers add uptime monitoring with email alerts, automatic re-scans when your repo changes, and a monthly health certificate.

Free covers one app and three deep scans a month, and the first fix is free.

Built and run by one engineer with nearly a decade of production DevOps. The product's whole claim is that it only reports what it measured: when it cannot measure something, it says so instead of guessing.

Social recommendations and mentions

Based on our record, Security Headers seems to be more popular. It has been mentiond 69 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

Security Headers mentions (69)

The Security Checklist Every Vibe Coder Needs Before Launch
Check: Go to securityheaders.com and enter your URL. A grade below B means you're missing important ones. - Source: dev.to / about 2 months ago
Four HTTP security headers every WordPress site should set
The curl above is the fastest check; all four lines should come back. In a browser, DevTools, Network tab, click the document request, read Response Headers. For a letter grade, securityheaders.com scores you against a known rubric. One quirk: these four alone land a B, and you reach A only once you add Content-Security-Policy. - Source: dev.to / 2 months ago
Manual Web Content Discovery: How You Can Find Hidden Paths Before Attackers Do
Remediation: Configure your web server to suppress or mask the Server header. Add security headers like Content-Security-Policy, Strict-Transport-Security, X-Frame-Options, and X-Content-Type-Options. You can use tools like securityheaders.com to check your current header posture. - Source: dev.to / 3 months ago
The LiteLLM Attack Exposed a Bigger Problem: Your Vibe-Coded App Probably Has the Same Vulnerabilities
Step 4: Check your security headers (2 minutes) Visit securityheaders.com and enter your deployed URL. If you get anything below a B, you're missing critical protections. - Source: dev.to / 5 months ago
5 things your website is getting wrong (and how to check for free)
How to check: Run curl -I https://yourdomain.com and scan the response headers. Or paste your URL into securityheaders.com for a free graded report. - Source: dev.to / 5 months ago

AppSitter mentions (0)

We have not tracked any mentions of AppSitter yet. Tracking of AppSitter recommendations started around Aug 2026.

What are some alternatives?

When comparing Security Headers and AppSitter, you can also consider the following products

Mozilla Observatory - The Mozilla Observatory is a project designed to help developers, system administrators, and security professionals configure their sites safely and securely.

Detectify - Detectify provides a user friendly and thorough web security scan that allows you to focus 100% on web development.

Hardenize - Hardenize provides a comprehensive and free assessment of web site network and security configuration.

Snyk - Snyk helps you use open source and stay secure. Continuously find and fix vulnerabilities for npm, Maven, NuGet, RubyGems, PyPI and much more.

Qualys SSL Server Test - This free online service performs a deep analysis of the configuration of any SSL web server on the public Internet.

UptimeRobot - Free Website Uptime Monitoring

Compare Security Headers VS AppSitter and see what are their differences