---
title: "Products | DuoCircle"
description: "The DuoCircle product portfolio: four groups covering email authentication, protection, delivery, and routing. Specialized products that deliver about 90 percent of category-leader capability at roughly half the price, backed by experts who own the outcome."
image: "https://www.duocircle.com/images/og-default.png"
canonical: "https://www.duocircle.com/products/"
---

# The DuoCircle portfolio

Four groups of specialized email products. Pick the one that solves your problem; ignore the rest. About 90 percent of category-leader capability at roughly half the price, backed by experts who own the outcome. Twelve years in operation, trusted by over 50,000 organizations worldwide.

[Talk to an expert](/contact/) [Compare to a category leader](/compare/) 

[ Authenticate SPF Management, DMARC Reporting (multi-region G2 Category Leader), free Mail Flow Monitoring, BIMI hosting once your VMC is in hand. SPF Management DMARC Reporting Mail Flow Monitoring See all authenticate products ](/products/authenticate/)[ Protect Phishing Protection, Spam Filtering, Visual Mail Verification (Verisend), and SpamSentinel for HCL Notes / Domino. Phishing Protection Spam Filtering SpamSentinel / Verisend / Inbox Genius See all protect products ](/products/protect/)[ Deliver Outbound SMTP, Developer Email API, Inbox Placement Testing, and Cold Email Outreach for sales-led teams. Outbound SMTP Developer Email API Inbox Placement Testing Cold Email Outreach See all deliver products ](/products/deliver/)[ Route Alumni Forwarding for universities, Tenant Migration for M365 and Workspace cutovers, Email Forwarding, and Backup MX. Alumni Forwarding Tenant Migration Email Forwarding Backup MX See all route products ](/products/route/) 

## How they work together

Most customers start with one product to solve one problem and discover the rest as they need them. Authentication enables Protection. Protection feeds telemetry that improves Delivery. Routing wraps the whole thing for the operational realities of merging M365 tenants, archiving alumni mail, or holding mail when your primary MX is down. Buy one, all, or any subset; everything is independent.

[About DuoCircle](/about-us/) [Customers](/case-study/)

```json
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```

```json
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```

```json
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```