DuoCircle Reviews in 2026

Audience

SMB and enterprises that need email hosting services to enhance email security, compliance, and improve deliverability

About DuoCircle

Reliable and secure email hosting services for SMB and Enterprise. Safely processing over 100 million emails per month for our customers. Enhanced gateway security and filtering, inbound email security, email service backup and outbound SMTP using a new high quality infrastructure for top quality results that our customers deserve. Products include, Secure email gateway, email backup MX, email forwarding, outbound SMTP and more. DuoCircle protects against phishing attack with Link Click Protection, a part of the Advanced Threat Defense Suite. You’re covered with Link Click Protection even if site content changes between clicks. You get total protection from phishing and your confidential corporate information is secured because your employees are simply prevented from visiting sites that misuse such information. You get instant feedback in the form of an alert when a suspicious link is about to be visited.

Other Popular Alternatives & Related Software

Greatmail

(8 Ratings)

Dependable cloud based email hosting with spam filtering, antivirus protection, generous storage and webmail. Compatible with Outlook and all other POP3/IMAP clients. High volume SMTP service for responsible senders. Outbound relay service for transactional messages, email marketing campaigns, newsletters and other applications. Dedicated email servers, clustering and multiple IP load balancing for high volume senders. Fixed monthly cost with unlimited sending and reputation monitoring. Greatmail is an email service provider (ESP) specializing in business class email hosting, SMTP hosting and email servers. For ISPs, application programmers and cloud developers, we also provide custom solutions including dedicated IP servers and process specific, load balanced configurations with multiple servers.

Learn more

SpamTitan

(39 Ratings)

SpamTitan email security is an email spam filter for businesses, smbs, MSPs, and schools. SpamTitan email security blocks spam as well as phishing and day-zero attacks, viruses, malware, ransomware, and other email threats. Helps control mail flow, clean it, and protect against unwanted email. We provide easy-to-use yet advanced email security for businesses, smbs and MSPs that are Office365 friendly. SpamTitan - Premium functionality included: • CEO Impersonation protection • Phishing/ Spear phishing protection • Link analysis • Full Sandboxing • Zero Day Attacks protection • Mail Spooling • Spoofing protection • Malware and Ransomware protection • SPF/DKIM/DMARC checking • Encryption • Fully multitenant environment • Ability to rebrand the entire UI • Full REST API: • Comprehensive support and set up docs Try a FREE, fully supported trial of SpamTitan Email Security today.

Learn more

SMTP.com

(2 Ratings)

Reliable SMTP relay and email delivery services. Powerful email delivery services that enable you to send and track high volume emails effortlessly. Integrate and start sending in minutes. All your transactional, email relay and email delivery needs under one roof. Whether you need a low-latency email delivery provider for your transactional emails, scalable infrastructure for high-volume sends or reliable backend solution for your marketing campaigns, SMTP is built to deliver. Reputation Defender is SMTP’s proprietary technology that uses big data to proactively monitor your email list health and safeguard your domain and IP reputation among ISPs by suppressing bad emails in your sends from hard and soft bounces. This ensures your delivery rates and inbox placement incrementally gets better over time.

Learn more

PhishTitan

(5 Ratings)

Powerful Inline Phishing Protection for M365. Harness the power of AI and our LLM to defeat phishing. PhishTitan is next generation inline phishing protection and remediation, powered by TitanHQ, the global leaders in email cybersecurity. Our proprietary large learning model and AI integrates directly with Microsoft 365, both catching and remediating sophisticated phishing and BEC attacks that Microsoft misses. It provides users with in-the-moment warning banners to help them decide whether an email is malicious or safe, continually enhancing the human firewall. Risk free deployment in 6 minutes. PhishTitan will filter your email to identify phishing threats and protect your users and business. That’s how you AVOID that one wrong click that can lead to disaster – all it takes is 6 minutes! The TitanHQ team has been a category leader in the email security field for over 20 years. Bringing the experience of working with over 12,000 customers to our new phishing solution.

Learn more

Integrations

API:

Yes, DuoCircle offers API access

See Integrations

Ratings/Reviews

Overall 0.0 / 5

ease 0.0 / 5

features 0.0 / 5

design 0.0 / 5

support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Videos and Screen Captures

Other Useful Business Software

Ship Agents Faster

Transform your applications and workflows into powerful agentic systems at global scale.

Gemini Enterprise Agent Platform lets you rapidly build, scale, govern and optimize production-ready agents grounded in your organization's data. The platform enables developers to build custom or pre-built agents for virtually any use case. New customers get $300 in free credits.

Start Free

Product Details

Platforms Supported

Cloud

Training

Documentation

Live Online

Support

Phone Support

24/7 Live Support

Online

Compare This Software

SpamTitan

SpamTitan email security is an email spam filter for businesses, smbs, MSPs, and schools. SpamTitan email security blocks spam as well as phishing and day-zero attacks, viruses, malware, ransomware, and other email threats. Helps control mail flow, clean it, and protect against unwanted...

Compare
Symantec Email Security.cloud

Safeguard Microsoft Office 365, Google G Suite, and on-premises email with the industry’s most complete email security solution. Insulate users from spear phishing, credential theft and ransomware attacks by using Email Threat Isolation. Prevent insidious email threats such as spear phishing,...

Compare
Libraesva Email Security

Protect your business from disruption, financial loss and reputational damage. Libraesva Email Security stops known and emerging email threats from reaching their target, so you only receive legitimate messages. It provides exceptional email security by integrating cloud email and a secure...

Compare
OpenText Core Email Threat Protection

OpenText Core Email Threat Protection safeguards inbound, outbound, and internal email by blocking phishing, ransomware, impersonation, and business email compromise attacks. The platform uses multilayered filtering, AI-driven detection, and advanced link and attachment analysis to stop threats...

Compare
EmailAuth.io

EmailAuth® is a TIER 1 OEM and a market leader in Email Authentication. Available 100% on-premise, or in-country cloud (local cloud) or on AWS/AZURE/GCP globally - We make it easy to unleash the power of email authentication. It is an anti-spoofing, anti-impersonation, and anti-phishing...

Compare

Recommended Software

SpamCheetah

SpamCheetah is a very affordable and effective way to combat spam, malware and viruses at mail server level. It operates as an SMTP proxy and stops all kind of phishing and business email compromise at SMTP level. It uses a combination of network level techniques like greylisting, greytrapping,...

See Software
SpamTitan

SpamTitan email security is an email spam filter for businesses, smbs, MSPs, and schools. SpamTitan email security blocks spam as well as phishing and day-zero attacks, viruses, malware, ransomware, and other email threats. Helps control mail flow, clean it, and protect against unwanted...

See Software
Symantec Email Security.cloud

Safeguard Microsoft Office 365, Google G Suite, and on-premises email with the industry’s most complete email security solution. Insulate users from spear phishing, credential theft and ransomware attacks by using Email Threat Isolation. Prevent insidious email threats such as spear phishing,...

See Software
Libraesva Email Security

Protect your business from disruption, financial loss and reputational damage. Libraesva Email Security stops known and emerging email threats from reaching their target, so you only receive legitimate messages. It provides exceptional email security by integrating cloud email and a secure...

See Software