DuoCircle vs. Mimecast
Mimecast is one of the major enterprise email security and continuity vendors. Like Proofpoint, they sell a broad suite (security, archiving, continuity, awareness) with enterprise-tier pricing and an enterprise-tier procurement experience. The capabilities are deep. So is the contract.
DuoCircle covers the practical core (anti-spam plus anti-phishing) at roughly half the cost, with engineering-led support and pricing on the product site instead of behind a quote.
This page is the honest comparison.
What DuoCircle covers
- Spam Filtering for Microsoft 365, Exchange, and on-premise mail. Multi-layer scoring, tunable false-positive controls, self-service quarantine release.
- Phishing Protection with click-time URL inspection, ransomware blocking, and impersonation defense.
- DMARC Reporting and SPF Management as the authentication side of email security.
- Backup MX for inbound continuity during primary-server outages.
What DuoCircle does not cover at full Mimecast scope: long-term regulatory archiving, full information-protection / DLP suite, end-user security awareness training programs, encrypted-mail products at full scope.
What Mimecast covers that DuoCircle doesn’t
- Long-term regulatory email archiving with retention, hold, and eDiscovery at compliance-suite scope. (DuoCircle’s Message Replay is a 45-day operational recovery layer, not a regulatory archive.)
- Full email continuity including outbound continuity during a multi-day primary-server outage. DuoCircle’s Backup MX queues inbound; Mimecast’s continuity covers more of the workforce-keep-working scenario.
- Awareness training and phishing simulation as a built-in product.
- Vendor-tier procurement for enterprises that explicitly need it.
Pricing comparison
- Mimecast pricing is enterprise-tier, gated behind a sales conversation. Expect quotes in the multi-thousand-per-month range for mid-market deployments.
- DuoCircle pricing is on the product sites. Spam Filtering and Phishing Protection together typically run roughly half what Mimecast charges for an equivalent security-only scope.
→ Visit phishprotection.com for current pricing.
When to choose Mimecast
- You need the full security-plus-archiving-plus-continuity-plus-awareness suite, not just the security layer
- You’re an enterprise with budget and procurement structure for tier-one email security
- Long-term regulatory archiving is a binding requirement and you want it integrated with your email security stack
When to choose DuoCircle
- You want strong anti-spam and anti-phishing on Microsoft 365 or Exchange without the full Mimecast bundle
- You’re mid-market or upper-SMB and the Mimecast quote is not realistic for your budget
- You’d rather get pricing off a product site and start a conversation with an engineer than navigate enterprise procurement
- Your archiving needs are operational (45-day recovery) rather than long-term regulatory
When to look elsewhere from both
- If you’re on Google Workspace, our Spam Filtering and Phishing Protection are not the right fit. Google’s built-in protection on Workspace is genuinely strong; we don’t think we add enough on top to justify the spend.
- If you need long-term regulatory email archiving as a hard requirement, neither DuoCircle’s operational recovery nor Mimecast’s archive bundle is a substitute for purpose-built compliance archives. Look at the dedicated archiving vendors.
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