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Zenlogin

Authentication/Email/Security

Security API which uses user agent, geolocation and AI and Machine Learning signals to notify your users when a suspicious login occurs. Sends out those familiar.

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About Zenlogin

Zenlogin is a suspicious login detection service that developers integrate via a single API endpoint. Applications submit login attempt details (identity key, email address, user agent, IP address) to the API, and the service uses AI-based sensitivity controls to detect unusual login attempts and notify end users by email. Notification emails include a map showing the approximate login location along with device, date, and IP information.

The service is built for developers adding a security layer to an application, website, or service without building the detection logic in-house. It supports custom rules for team notification on login attempts, and maintains detailed logs of suspicious logins. Zenlogin states it does not store personally identifiable information, with email delivery handled through Postmark, where data is retained for 45 days.

Pricing includes a free tier for usage under 500 requests and 50 email notifications per month, and a Pro plan at $199/month covering 25,000 requests and 2,500 suspicious login emails, with detailed logs, custom rules, maps integration, and branding removal. Paid plans include a 14-day money-back guarantee. Client code examples are provided for curl, PHP, Node, Python, and Ruby, and an Auth0 integration is referenced.

Key features

  • AI-powered detection of unusual login attempts with email notifications
  • Maps integration showing login location in notification emails
  • Custom rules to notify team members of login attempts on their accounts
  • Detailed logs tracking suspicious logins
  • Single-endpoint API integration with support for curl, PHP, Node, Python, and Ruby

Frequently asked questions

Is there a free tier?

Yes, Zenlogin is free to use as long as usage stays under 500 requests and 50 email notifications per month.

How much does the paid plan cost?

The Pro plan is $199 per month for 25,000 requests and 2,500 suspicious login emails, including detailed logs, custom rules, maps integration, and branding removal.

Which server-side languages are supported?

Zenlogin supports all major server-side languages via a single API endpoint.

Does Zenlogin store personally identifiable information?

No, Zenlogin does not store PII; email data is only stored with Postmark, their email provider, for 45 days.

Is there a money-back guarantee?

Yes, Zenlogin offers a 14-day money-back guarantee on any paid plan.

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