StrongestLayer
AI-native email security that reasons about message intent and explains verdicts across Outlook and Gmail.
About StrongestLayer
StrongestLayer is an AI-native email security platform designed to identify modern phishing, business email compromise, impersonation, and payment-redirection attempts by reasoning about a message’s intent rather than relying only on known signatures or anomaly scores. Its TRACE engine evaluates sender context, message purpose, and infrastructure, then records an explainable verdict for analysts. The platform includes Inbox Advisor for plain-language guidance inside Outlook and Gmail, Threat Triage for pre-investigated alerts, and Threat Hunt for sweeping protected mailboxes by sender, subject, URL, or domain. Deployment connects through Microsoft Graph or the Google Workspace API, requires no MX record changes, and can run alongside an existing gateway or replace it. StrongestLayer says deployment takes about 15 minutes, reports false positives below 1%, and processes email content in memory while retaining verdict records and reasoning traces for SOC audit. Pricing is custom and scales by mailbox, so buyers need a deployment-specific quote rather than a public per-seat rate.
Best for
Best use cases
A suspicious invoice requests new banking details, and the platform evaluates sender history, domain similarity, and payment intent.
An analyst receives an email alert and needs a pre-investigated verdict with a reasoning trail before closing the case.
A confirmed malicious sender or URL triggers a sweep across protected mailboxes to find and remediate related messages.
Compare before choosing
Intent-based reasoning targets novel attacks that have no known signature, while conventional gateways often emphasize prior patterns.
API deployment avoids MX record changes and supports parallel operation with an existing email security gateway.
Custom mailbox-based pricing requires a sales quote, so public self-service cost comparison is limited.
Features
Inbox risk guidance
Give Outlook and Gmail users a plain-language verdict explaining whether a message is safe, suspicious, or blocked.
Threat alert triage
Deliver pre-investigated email alerts with an explainable verdict and reasoning trail for security operations teams.
Organization-wide threat hunt
Search protected mailboxes by sender, subject, URL, or domain and remediate related messages across the organization.
Pros
- API deployment requires no MX record changes and can run alongside an existing email security gateway.
- Explainable verdicts and pre-investigated alerts can reduce the manual effort required for SOC email triage.
- Inbox guidance, threat triage, and organization-wide hunting cover both employee decisions and analyst workflows.
Cons
- Custom mailbox-based pricing prevents buyers from estimating total cost from a public rate card.
- Deployment is designed around Microsoft Graph and Google Workspace APIs, which limits fit for other mail platforms.
- Security questionnaire and detailed data-handling documentation are available under NDA, adding a sales step to trust review.
Pricing Plans
Custom
- Mailbox-based pricing
- Inbox Advisor, Threat Triage, and Threat Hunt
- Microsoft Graph or Google Workspace API deployment
* Pricing information is for reference only. Please refer to the latest announcement on StrongestLayer's official website.