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Guardio Secures $80M to Enhance AI Phishing Detection

11/20/2025

Summary

Story summary

Guardio, the cybersecurity startup, has secured $80 million in a Series B led by ION Crossover Partners to boost AI-generated phishing detection.
Founded in 2018, Guardio evolved from a browser extension to a security platform, with 500,000 paying users and $100 million ARR.
The investment will fund visibility tools that identify shared documents and accounts without multi-factor authentication.
Guardio aims to bridge consumer security with enterprise protection against AI-driven threats.

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Story summary

Guardio, the cybersecurity startup, has secured $80 million in a Series B led by ION Crossover Partners to boost AI-generated phishing detection.
Founded in 2018, Guardio evolved from a browser extension to a security platform, with 500,000 paying users and $100 million ARR.
The investment will fund visibility tools that identify shared documents and accounts without multi-factor authentication.
Guardio aims to bridge consumer security with enterprise protection against AI-driven threats.