What is DuoCircle?
DuoCircle provides a comprehensive suite of email infrastructure products designed to help organizations authenticate, protect, deliver, and route email effectively. The portfolio includes tools for SPF management, DMARC reporting, phishing protection, outbound SMTP, email forwarding, and more. Each product is built to address specific customer needs, often offering about 90% of the capability of category-leading vendors at roughly half the cost. Since 2014, over 50,000 organizations have relied on DuoCircle for secure, reliable email operations backed by experts who own the outcome, not sales reps. The company holds SOC 2 Type 2 certification, CSA STAR registration, and maintains a 4.8-star G2 average from verified reviews.
Features
- AutoSPF SPF Management: Automatically flattens SPF records to stay within DNS lookup limits.
- DMARC Reporting: Multi-region G2 Category Leader for DMARC analysis and enforcement.
- Phishing Protection: Click-time URL inspection, BEC defense, and impersonation detection.
- Outbound SMTP: Transactional email relay with free tier up to 1,000 emails per month.
- Developer Email API: Programmatic sending via REST API (unsent.dev).
- Cold Email Outreach: Bring-your-own-mailbox outreach with deliverability hygiene (NuReply).
- Email Forwarding: Manage forwarding rules for departments, alumni, or tenants.
- Tenant Migration: Simplify M365 and Workspace cutovers.
- Backup MX: Ensure email continuity during primary server outages.
- Mail Flow Monitoring: Free, real-time visibility into email traffic.
Use Cases
- Fix SPF record exceeding DNS lookup limits.
- Implement DMARC enforcement to stop domain spoofing.
- Protect against phishing and BEC attacks.
- Relay transactional emails from applications.
- Test inbox placement before sending campaigns.
- Run cold email outreach with high deliverability.
- Forward emails for alumni associations.
- Migrate tenants between M365 and Workspace.
- Set up backup MX for email redundancy.
- Monitor email flow for suspicious activity.
FAQs
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How does DuoCircle's pricing compare to enterprise vendors?
DuoCircle offers about 90% of the capability of category-leading vendors at roughly half the cost, with transparent pricing on product sites and no procurement runaround. -
What free tiers are available?
DMARC Report covers your first domain for free, Outbound SMTP is free up to 1,000 emails per month with no credit card required, and Mail Flow Monitoring has been fully free since 2018. -
Is DuoCircle SOC 2 compliant?
Yes, DuoCircle has been SOC 2 Type 2 certified annually since 2022 under the AICPA Trust Services Criteria, audited by Hancock Askew & Co. -
Can I get a reference call with a customer?
Yes, DuoCircle can arrange a reference call with a customer who has authorized attribution, such as Arakÿta or eXp Realty, upon request from serious prospects. -
Does DuoCircle offer support for HCL Notes / Domino?
Yes, DuoCircle provides SpamSentinel for HCL Notes / Domino as part of its Protect product group.
