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Google Workspace phishing add-on: what to add, and what you already have

Before you buy anything, know this: Gmail's built-in filtering is good, and Workspace admins can make it stricter. Most add-ons are trying to solve one of two different problems. Know which one you have.

Problem 1: phishing reaches inboxes

That's a filtering problem. Start with the Workspace admin console's safety settings: protections against spoofing, suspicious attachments and links. Then think about an API email-security vendor if mail still gets through.

Problem 2: someone gets in anyway

Once an attacker has a working password and session, the mail they send comes from a real account and reads fine. The signs show up in the audit logs instead: a sign-in from a new place, a new Gmail filter that skips the inbox, a forwarding address, a delegate, an OAuth grant, a 2-Step Verification change. We wrote about that Gmail filter blind spot.

Comparison

OptionSolvesInstallPrice
Workspace built-in protectionProblem 1Already on. Tune it in the admin console.Included
API email security vendors (for example Material, IRONSCALES, Avanan)Mostly problem 1, some cover problem 2API connectionVaries. Check each vendor.
MSP with a managed SOCBoth, if in scopeThrough your providerVaries
InboxGuardsProblem 2Google Workspace Marketplace, read-only admin consent$2/user/mo or $20/user/yr

How InboxGuards works on Google Workspace

An admin grants two read-only scopes. InboxGuards checks the audit records at the fastest cadence standard plans allow, with no premium security licensing needed, and raises an alert when a configured takeover signal appears. It doesn't read message content, can't change your settings, and isn't a staffed SOC. Revoke access from your admin console at any time.

Common questions

Does Gmail already block phishing?

Gmail filters a lot of phishing and malware, and Workspace admins can tighten the settings. Filtering judges incoming messages, though. It doesn't tell you that someone signed into a real account and added a filter or forwarding address.

What permissions does InboxGuards request on Google Workspace?

Two read-only Admin SDK scopes: admin.reports.audit.readonly for audit logs and admin.directory.user.readonly for user status and 2-Step Verification enrollment. Gmail message content is not requested.

Where do I install it?

From the Google Workspace Marketplace listing, or by signing up at inboxguards.com.

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