AegisAI connects to Microsoft 365 or Google Workspace by API in about 5 minutes, no MX record change, no mail flow disruption. It runs in monitoring mode next to whatever gateway you have today, so you compare verdicts on your own mail before you touch a single routing rule.
Whatever you run today, Proofpoint, Mimecast, Barracuda, Check Point Harmony, the hard part of leaving it is rarely the new product. It is the paperwork that surrounds anything sitting in the mail path. For the architecture differences by vendor, see the named gateway comparison.
Third-party involvement now features in 48% of all breaches (Verizon 2026 DBIR), so anything touching mail flow gets scrutinized before it gets approved. That review is reasonable. It should not require a cutover just to gather evidence.
Every allow-list rule and quarantine exception on a gateway needs an owner, a justification, and an expiration date before a migration can even be scoped (Security Boulevard, 2026). Most gateways in production have none of the three.
A rule tuned last quarter reflects last quarter's attacks. AegisAI reads each message on its own terms: sender history, the actual ask, where the links go, so there is no rule list to inherit or rebuild.
Nothing in this sequence changes routing, MX records, or your gateway's configuration.
Read-only, reviewable before you approve it, revocable at any time. Your gateway keeps filtering mail exactly as configured.
Aegis reads a copy of delivered mail through the platform API. Your existing gateway is untouched and still sits wherever it sits today.
Live messages get a written verdict with reasoning attached, visible next to whatever your gateway decided about the same message.
Enough live mail has passed through both systems to compare what each one caught and what each one wrongly flagged.
Keep both running, replace the gateway, or do neither. AegisAI runs in monitoring mode until you tell it to do otherwise.
Two different architectures, described as they work. The evaluation question is which one gets your mail right, and you can answer it without changing anything.
A gateway sits in the mail path and can stop a message pre-delivery. AegisAI does not, and we will not pretend otherwise. It connects after delivery, reads a copy of the message through the platform API, and removes a malicious one retroactively across every affected mailbox, typically pulled in 1.9s, before users see or click.
That is the trade, and it is the same property that makes this evaluation safe. Pre-delivery blocking is exactly what puts a vendor in your routing path, and being in the routing path is what turns a product decision into a cutover, a maintenance window, and a rollback plan. Nothing about running AegisAI beside your gateway is irreversible, because AegisAI was never in the delivery path to begin with.
Scope, plainly: this page is about inbound detection and triage. Outbound DLP, encryption, and content filtering are not covered here. If your gateway is doing that work today, it keeps doing it.
No. AegisAI runs in monitoring mode alongside your existing gateway. Nothing about your mail flow changes until you decide it should.
Nothing. Your gateway keeps running its own configuration. AegisAI does not import or depend on it.
No. This page is about inbound detection and triage. If your gateway is doing outbound DLP or encryption today, that stays with your gateway until you decide otherwise.
Then you keep your gateway. The evaluation is on your mail, not a reference customer's, so there is nothing to take on faith.
Revoke the OAuth grant. There is no gateway configuration or MX record to unwind on either side.
That is your call and your change-control process. AegisAI does not force a date. Monitoring mode has no expiration.
The point of running side by side is that you get your own version of these figures.
Thirty minutes. Real attacks pulled from environments like yours (BEC, vendor fraud, credential phishing) with the reasoning behind each verdict. No setup required.
Five-minute connect · monitoring mode · disconnect any time without touching mail routing