Email experts, not sales reps. Since 2014.
A family of specialized email products covering authentication, protection, delivery, and routing. About 90% of category-leader capability at roughly half the cost, backed by experts who own the outcome. Twelve years in operation, over 50,000 organizations.
DuoCircle Portfolio Operations
AuthenticatePASS
12.4K
SPF + DKIM + DMARC checks today
Protect
3 caught
847K messages scanned, 3 phish blocked
Deliver
99.99%
2.1M SMTP messages relayed, 0 backlog
Route
healthy
488K forwarding rules active, 0 alerts
Email infrastructure, in four groups
Specialized products covering authentication, protection, delivery, and routing. Each one built because a customer asked for help that the existing vendors wouldn't engage with at their tier.
01 Authenticate
- SPF Management (AutoSPF)
- DMARC Reporting
- Mail Flow Monitoring
- BIMI hosting
02 Protect
- Phishing Protection
- Spam Filtering
- Visual Mail Verification
- SpamSentinel
03 Deliver
- Outbound SMTP
- Developer Email API
- Inbox Placement Testing
- Cold Email Outreach
04 Route
- Alumni Forwarding
- Tenant Migration
- Email Forwarding
- Backup MX
The math
About 90% of the capability. About half the price.
The pattern holds across every category we compete in: enterprise security, DMARC reporting, transactional sending, cold outreach. We give you the capability that actually moves your email program. When you genuinely need the other 10%, we will tell you, and we will point you somewhere better.
How customers find us
One product brings them in. The rest of the portfolio keeps them.
A team comes to AutoSPF to fix an SPF record that's blowing the 10-DNS-lookup limit. The immediate problem gets fixed. A few weeks later they realize the bigger issue isn't SPF flattening, it's that their domain has no DMARC enforcement and they don't actually know who's sending mail as them. So they add DMARC Report alongside AutoSPF, and finally see the full picture.
In the customer's words
“DuoCircle is easy to work with and willing to make it happen. Their solution is solid.”
Dennis Schroder
President and CEO, Arakÿta
Why DuoCircle
The proof, plainly
Third-party-verifiable trust signals plus the operating principles that have run the company since 2014.
SOC 2 Type 2 since 2022
Audited annually under the AICPA Trust Services Criteria (Security, Availability, Confidentiality, Processing Integrity).
Email experts, not sales reps
When you call DuoCircle, the person on the call is the person who will solve the problem. No SDR funnel, no multi-tier escalation queue.
Customer accolades, earned not bought
Hundreds of verified reviews across the portfolio at a 4.8-star aggregate. Multi-region category-leadership recognition.
Use the free tier as long as it works
Outbound SMTP, free up to 1,000 emails a month, no card required. DMARC Report covers your first domain. Mail Flow Monitoring has been fully free since 2018.
Friction-free trust posture
Pricing on the product sites. SOC 2 reports under a publicly-published Bonterms Mutual NDA. Free tiers wherever they fit.
Reference calls beat logos
Most of our enterprise customers prohibit logo use to keep SaaS vendors from leveraging their brands. Those same customers will take a phone call from a serious prospect to vouch for DuoCircle directly.
The standard we hold ourselves to
When prospects come to us for an evaluation, we give them a fair technical answer. Sometimes that answer is "you don't actually need what we sell." Sometimes it's "the right answer is somebody else, here's why." Sometimes it's "yes, this is a fit, here's how it would work."
The honest "look elsewhere" stance shows up on every product page. We'd rather walk away from a bad fit than sell into one. The customer base we have today, more than 50,000 organizations across twelve years, is built on that operating principle, not in spite of it.
Talk to an expert about your email infrastructure
Same-day response. Real expert on the call. We tell you yes or no quickly, and we'll point you somewhere better when we can.