Guardr
Security and uptime monitoring for client sites — SSL, headers, DNS, exposed files and leaked JS secrets, graded A–F.
Visit Guardr
guardr.ioAbout Guardr
Guardr is a security and uptime monitor aimed at the people who look after other people's websites — web agencies with twenty client sites, freelancers who get asked whether a site has security problems, and solo developers who would otherwise never run these checks. A scan takes about five seconds, requires no signup and works on any site: it covers SSL certificate state, security headers, DNS, exposed files, secrets leaked into JavaScript bundles and cookie configuration, returning an A–F grade with a plain-English fix for every issue rather than a raw findings dump. Once you sign up it moves from a one-off scan to continuous monitoring, checking 24/7 from three global regions and alerting the moment something changes — an expiring or misconfigured certificate that would otherwise show visitors a full-page browser warning, injected content, or plain downtime. The framing for agencies is commercial rather than technical: it turns 'is my site secure?' from an open-ended rabbit hole into a line item on a retainer with an artefact behind it. The site reports over 10,400 sites scanned. The first site is free forever, which makes it usable as a permanent monitor on a personal project without a card, and there are docs and a blog alongside the product.
Does ChatGPT recommend your AI tool?
If you're building in AI Security & Testing, run a free AI-visibility scan on your own product — we ask ChatGPT across 5 prompt angles and score how often you get named. ~30 seconds, no signup, no card.
Key Features
Tags
Is Guardr your tool?
This is the page buyers and AI assistants read when they look up Guardr. Claim your listing for $19 one-time — no subscription, nothing to cancel — and get a Featured badge, top placement in your category, and a permanent dofollow backlink. Prefer it ongoing? Monthly is one click away on the next page.
Complete Your Security Stack
Other security tools in our catalog:
1Password
Try FreeSecrets and credential manager
Keep API keys and .env secrets out of your repo
Gamma
Try FreeAI presentation builder
Turn ideas into polished decks instantly
AdCreative.ai
Try FreeAI-powered ad creatives
Generate marketing visuals in seconds
💰 Affiliate disclosure: We may earn a commission if you sign up through these links at no extra cost to you.
Stay updated on AI Security & Testing tools — join our weekly newsletter
One concise email with fresh launches, trending picks, and featured standouts.
Alternatives to Guardr
View all Guardr alternatives →More AI Security & Testing tools
KeyEnv
CLI-first, end-to-end encrypted secrets manager for dev teams, written in Rust
Marker
Simulation and eval platform for voice and chat agents, deployable hosted, in your VPC, or air-gapped on-prem
SigmaShake
Runtime guardrails that block dangerous AI agent commands deterministically in about 85ms, with full audit
HireBias Audit
AI hiring bias audit and EEOC algorithm compliance reports for employers.
HOL Guard
Local runtime security for AI coding agents
Agentes Inteligentes
IA inmobiliaria que contacta y califica prospectos.
Agent connectivity: not yet verified