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A free online tool that parses raw email headers and checks SPF, DKIM and DMARC results, traces the hop path and flags delays or spoofing signs. No sign-up needed.

Alternatives to Email Header Analyzer

All Security software tools

SourceTrust

SourceTrust turns the dependency list you already have into a reviewed, public compliance page: every open-source package you ship, its license, and what you did about each obligation.

Endpoint Index

Independent editorial database of antivirus, EDR, and MDR products for small and mid-size businesses. Endpoint Index publishes sourced prices, lab results, capability evidence, and a transparent SMB Fit Score with verification dates. Free listings; paid placement cannot change scores or rankings.

liarjs.dev

liarjs.dev reads your browser in JavaScript, then asks the network layer what it actually saw. A browser controls its own JavaScript but not the connection it arrives on, so every disagreement between the two is a finding. Detection runs on three separate axes that fail independently. Fingerprint: Canvas, WebGL, WebGPU, audio, fonts, timezone and the plugin face. Network: TLS version, HTTP protocol, ASN, header shape and exit-IP geography, read at the Cloudflare edge. Automation: navigator.webdriver, framework residue, headless tells and a pointer-movement challenge. The score measures internal coherence, not a ban prediction, and stays provisional until the challenge is passed. The passive checks ship as an MIT-licensed npm package: run npx liarjs against a patched Chromium, a stealth automation stack or an antidetect profile and get the same score with an exit code in CI.

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StackSnack

StackSnack helps builders inspect deployed websites for exposed credentials, recognized libraries with known vulnerabilities, and configuration gaps. Reports explain the findings and provide practical fix prompts and PDF downloads. Website and backend verification unlock deeper checks, including optional Supabase cross-user tests using two test accounts. Start with a free public website scan, or explore the controlled before-and-after sample at https://stacksnack.io/sample-report.

Flarehawk

Real-time Cloudflare security and threat detection

Keel

Keel is a governance, risk, and compliance (GRC) platform that helps SMBs and MSPs prepare for and demonstrate audits across frameworks such as SOC 2, ISO 27001, HIPAA, and PCI DSS. It provides a single control library with framework crosswalks, evidence management, vendor risk, policy and questionnaire automation, readiness reports, and integrations.