Security Tools

261 tools 1,436,745 sites Section: Infrastructure

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Source: All sites All launches Launch platforms StackScope Discovery StackScope Wider Web

The most-adopted security tool we track is HSTS (1,311,905 sites). We've detected 261 security tools across 1,436,745 public sites.

Note (Jul 1, 2026): Adoption figures now count launches from launch platforms. Use the source view to include StackScope Discovery.

Security tools we've detected

Tool	90‑day	Sites
HSTS site ↗ HTTP Strict-Transport-Security (RFC 6797): site forbids HTTP downgrade.		1311905
Cloudflare Bot Management site ↗ Paid add-on that scores incoming requests for bot likelihood.		317356
Google reCAPTCHA site ↗ Bot-detection challenge service used to gate forms and logins against automated abuse.		50122
DDoS-Guard site ↗ Russian DDoS protection, CDN, and reverse proxy provider.		2484
Anubis site ↗ Open-source proof-of-work anti-bot challenge proxy.		1957
Firebase App Check site ↗ Google attestation service to verify requests come from your app.		1567
BitNinja site ↗ Server-side security suite and web application firewall that filters malicious traffic.		1540
PerimeterX site ↗ PerimeterX (now HUMAN): bot mitigation and account-takeover protection for web apps and APIs.		1491
Altcha site ↗ Open-source proof-of-work CAPTCHA alternative; uses a TXT DNS record for domain verification		1135
CleanTalk site ↗ Anti-spam, security, and form protection service popular as a WordPress plugin.		694
StackProtect site ↗ Website security and bot-filtering layer bundled with 20i hosting.		585
TrustedSite site ↗ Site security and trust badge program (formerly McAfee SECURE) showing scan and certification badges.		383
Imperva site ↗ Cloud web application firewall and DDoS protection.		360
Tencent Captcha Bot-detection challenge service from Tencent Cloud, popular on Chinese websites.		341
Alibaba Baxia Alibaba anti-bot and risk-control component used for slider captcha and fraud detection.		337