How Check Works

Protection that operates exactly where users are most vulnerable - at the moment they encounter a malicious page.

how it works

Browser-Level Interception

Check blocks malicious sites before they load in the browser. Blocked pages cannot display credential fields or collect user data.

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Open Source Development

Check is developed as an open source project with contributions from the security community.

Check out the repository
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Built for MSP Workflows

Deploy with your own branding through existing RMM tools. Users see your company name instead of ours.

Join the community
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Automatic Rule Updates

Rule updates deploy automatically to protect against new threats without waiting for vendor releases.

Learn about rules

Deploy Through Your Existing Stack

Deploy Check using your existing tools: RMM, Group Policy, or manual installation. No additional infrastructure required.

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Why Check is Different

Traditional anti-phishing filters email, but threats arrive through multiple channels. Check blocks malicious pages after the click, before credentials are entered. Open source code can be reviewed and modified.

  • Blocks malicious pages in the browser
  • Works regardless of email filtering
  • Does not rely on signature-based detection
  • Requires no user training
  • Rule updates deploy automatically
  • Open source code available for review
  • Can be branded for MSP deployment
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What MSPs Say About Check

Feedback from MSPs using Check in production environments.

CyberDrain is the best company in the MSP space. Vendor, community, or otherwise. The attackers are open-sourcing their sketchy hacker tools. Why wouldn’t we do the same by banding our defences together? Every user and contributor is fighting the good fight.

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Safety with Simplicy! CyberDrain did it again - Check is an amazing contribution to the world to help keep credential hijacking away from unsuspecting users. Completely private and anonymous, and FREE! Go CyberDrain

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CyberDrain has become a trusted part of how we deliver proactive service to our clients. Deploying Check has given us peace of mind, and helps us stand apart from other local providers. With its easy white-label branding, we and our clients can focus on the work that matters day to day instead of chasing down account compromises and cleaning up the mess after.

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Check has quickly become an essential layer of protection for 1 MSP. By blocking phishing at the browser and stopping credential theft before it happens, we improve security without adding complexity. Its dynamic rules, seamless deployment, and white-labeling let us deliver proactive, timely protection to our clients.

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Check it out today