The Application Security Guide:
198 Tools, Reviewed.
Independent, side-by-side comparisons. What each application security tool does, who it fits, and where it falls short.
Featured research & buyer guides
Original research, side-by-side comparisons, and category buyer guides — refreshed quarterly.
Where every security category fits in your pipeline
All twelve categories, mapped to where they fit — from your editor to runtime. The whole landscape on one screen.
Eight years on the vendor side. Now on yours.
I spent eight years selling application-security tools — thousands of evaluations and demos. I know the landscape, the pricing, and the trade-offs from the inside. So I judge every tool the same way, against what a buyer actually needs, then tell you who it really fits.
Deeper benchmarks & original data live in a separate Research track — reproducible studies with open methodology and published data.
Read the full methodologyHead-to-head AppSec tool comparisons
Matchups across the AppSec stack — backed by official docs, current pricing, and community feedback I track.
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Gitleaks vs TruffleHog: Secret Scanner Benchmarks
Which open-source secret scanner ships fewer false positives at scale.
Read the breakdown
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Dependabot vs Renovate 2026: Dependency Update Showdown
GitHub-native simplicity vs multi-platform power — pick by team scale.
Read the breakdown
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Checkmarx vs Fortify 2026: Enterprise SAST Matchup
Two enterprise SAST giants compared on coverage, false positives, and pricing.
Read the breakdown
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Burp Suite vs ZAP: DAST Head-to-Head
Commercial polish vs open-source breadth — chosen by what your team values.
Read the breakdown
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Radare2 vs Ghidra: Reverse Engineering Showdown
CLI-first hacker tool vs NSA-grade GUI suite — picked by workflow.
Read the breakdown
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Garak vs Promptfoo: LLM Security Testing
Red-team automation vs evaluation harness — where each tool fits.
Read the breakdownAppSec Santa resource hubs
Start with the discipline, then drill into a category. Each hub covers what it is, what you'll learn, and the guides and comparisons worth reading first.
The whole picture before you pick tools: the threats, the testing methods, and how a working AppSec program fits together — from design through runtime.
Start with the fundamentalsWhat you'll learn
- How SAST, DAST, SCA, IAST, and RASP differ — and which to run when
- The seven practices that make up a working AppSec program
- Where each control fits across the secure SDLC, from design to runtime
What you'll learn
- How prompt injection actually works (and why most filters miss it)
- The difference between LLM red-teaming, runtime guardrails, and AI-BOM
- How Garak, Promptfoo, and DeepTeam compare on jailbreak coverage
- When LLM guardrails are enough vs. when you need full red-teaming
What you'll learn
- How false-positive rates make or break SAST adoption — and which vendors publish honest numbers
- What custom rules unlock that out-of-the-box rule packs miss for your stack
- Where each engine wins: data-flow on Java vs taint on JS vs pattern-match on Go
- How OpenGrep, Semgrep, Snyk Code, and Checkmarx differ on trust-boundary modeling
What you'll learn
- Why authenticated DAST is non-negotiable for modern SPAs and APIs
- Where active scanning still beats passive, and where the cost is too high
- What it really takes to wire DAST into CI/CD without slowing release trains
- How Burp Suite, ZAP, Acunetix, and Invicti differ on coverage vs. operating burden
What you'll learn
- Why reachability analysis cuts vulnerable-dependency noise more than vulnerability databases do
- How SBOM generation has converged but vulnerability databases have not
- Where Trivy, Grype, Snyk, and Mend win per stack and team size
- When auto-fix PRs help and when they create review fatigue
Free website scanners
Drop a URL, get an audit in seconds. No signup, no email collection — just fair-use limits to keep them free for everyone.
- Security Headers Checker — runs 11 security tests (Mozilla Observatory v5) including CSP, HSTS, X-Frame-Options.
- SSL/TLS Checker — protocol versions, cipher suites, certificate chain, and expiry warnings.
- Subdomain Finder — passive enumeration via Certificate Transparency logs.
- DNS Security Checker — DNSSEC, SPF, DMARC, DKIM, and CAA record validation.
- CSP Header Generator — builds a CSP Level 3 policy from your live tag inventory.
Example output. Pick a checker above to scan your own site.
Suphi Cankurt
One email every Tuesday. No vendor marketing.
Fresh comparisons, new tool reviews, and the vendor releases that matter — written by one person who tracks the changelogs for you.
- The week's most significant tool updates
- One fresh head-to-head comparison
- New reviews + category shifts