Security guides your team can ship this week

Mozilla Observatory does something valuable for free: it checks your security headers, TLS, and cookies and gives you a score. But it doesn't monitor, doesn't have a public API for automation, and covers a relatively small slice of your total security surface. Here's what to use when you need more.

Weak password storage and poor policies remain the root cause of the majority of data breaches. This guide covers everything from hashing algorithms to breach detection in 2026.

Security audits are one of the highest-margin services a web agency can add. Clients already trust you with their website — adding a security check is a natural extension that delivers real value, commands a premium, and requires minimal additional expertise when you have the right tools.

E-commerce websites are attacked more frequently than almost any other category of site. The combination of payment data, customer accounts, and high transaction volume makes them valuable targets for automated attacks. This guide covers the security fundamentals, PCI DSS requirements you actually need to understand, and the tools that keep online stores protected.

Security is one of the few things that can kill a SaaS product overnight. A data breach, a failed security review from an enterprise prospect, or a vulnerability notice from a researcher — any of these can derail months of work. This guide covers the 10 security categories every SaaS needs and a practical tool for each.

SecurityHeaders.com checks 6 headers. ZeriFlow runs 80+ checks across 12 categories. Compare both tools.

Next.js is a powerful framework, but its flexibility also creates a wide attack surface — from API routes and server components to client-side rendering and third-party dependencies. Here are 8 tools every Next.js developer should be using.

SecurityHeaders.com is a great tool for checking HTTP security headers, but it only tells part of the story. Discover what it misses and how to get a complete security picture.

SecurityHeaders.com is the go-to tool for quick HTTP header checks, and it does that job well. But header scanning is only one part of website security. This comparison shows what SecurityHeaders.com covers, where it stops, and what a more complete scanner adds.