DuoCircle Spam Filtering Alternatives (September 2025)

Real-time link click protection defends against malicious links in emails every time, on every device, from anywhere.

Boost your email security with Proofpoint Essentials and OnDMARC; protect your business against phishing, ransomware, and fraud.

MX Layer provides cutting-edge cloud-based solutions for email security, business continuity, data loss prevention, and email archiving services.

An essential suite of email and web security services for SMB and Enterprise.

Exceptional Email Security, Email Archiving and Phishing Awareness. Libraesva stops Zero-Day Email Attacks, integrating with M365 and Google

Spambrella is your company for managed email security services and User Awareness Training solutions and products. Try our security services for email today!

Email security is critical for all organizations. Block all email attacks using Mimecast's advanced email security product with targeted threat protection.

Award-winning cloud-based email security platform prevents phishing, malware, spoofing, and BEC, from reaching a user’s mailbox. See the Trustifi Difference.

Powerful, effective protection against spam and malware

Email security and spam filtering with SpamTitan from TitanHQ uses double AV and AI driven malicious URL detection to block malicious threats

Safeguard your network’s most vulnerable system with anti-virus and anti-spam technologies that block malicious software and spam at the gateway.

VIPRE provides email security solutions for every size organization and the IT partners that serve them.

Protect your enterprise with best in breed email security from Sendio. Eliminate ransomware, phishing attacks, spam and malware using behavioral technology.

Email Security, Archiving, Encryption, & Awareness Training. Compatible with Office 365. Virus, Phishing, Ransomware & Malware Protection.

Secure your business with total messaging control. Cybonet stops the majority of malicious email threats at your network's perimeter while simultaneously providing a range of additional options for comprehensive security and messaging control.

Protect your business e-mail from cyberattacks: phishing, ransomware, spam, viruses. Installation in just a few clicks. French solution 🇫🇷

Your smart DMARC reporting and monitoring platform. Ensure domain-level security and email deliverability with EasyDMARC’s DMARC, SPF, DKIM, and BIMI services.

N-able Mail Assure offers MSPs AI-driven email security with close to 100% filtering accuracy. Mail Assure also provides continuous uptime and email archiving.

SMX offers a cloud-based email security solution for SEG, archiving and added Microsoft 365 defence. Trusted by enterprises, governments and ISPs across ANZ.

INKY helps companies secure email using a cloud-based security platform that proactively and instantly scans inbound, internal, and outbound emails to eliminate phishing and malware. The platform intelligently eliminates security threats by blocking malicious emails while assisting employees in real time to handle suspicious emails.

Secure your business emails. Train your employees to cyber attacks. Protect your emails with Mailinblack.

Enhance VIPRE Email Security Cloud with unparalleled protection against malicious links and infected attachments.

Take back control of your email reputation with award-winning, cloud-based DMARC, DKIM and SPF configuration and management.

Over 90% of targeted ransomware attacks start with a spear phishing attack. But with a single appliance, you can detect and block targeted attacks.

Intelligent Email Security protects against data breaches by engaging and empowering users without introducing friction.

Prevent malware, ransomware and other threats from compromising your email and your business with Secure Cloud.

Achieve and maintain DMARC enforcement 4x faster than any other platform with Valimail’s best-in-class email authentication solutions.

Mesh is the world's first email security platform built exclusively for MSPs, enhancing their efficiency and ensuring greater safety for their customers. Offering flexible deployment options - Mesh Gateway (MX based), Mesh 365 (API based), and Mesh Unified (MX and API based) - Mesh protects organiza

Full suite for Microsoft 365 security, Risk, Governance, Compliance & Backup

Guardian Digital has developed unparalleled AI-powered business cloud email security services. Secure your business emails and stay threat-ready today.

Barracuda Essentials for email security provides IT service providers with complete email security, archiving, e-discovery and backup solution.

MailGuard is a leading Australian technological innovator, providing complete enterprise-grade protection against email security threats such as phishing, ransomware, and BEC. First to stop fast breaking attacks, MailGuard detects and prevents email threats 2-48 hours ahead of the market.

Mailprotector has the complete email security products your users need to cover all three comprehensive pillars: email security, encryption, and privacy.

GreatHorn is an API, cloud-native email security solution that mitigates the risk of business email compromise across Microsoft 365 and Google Workspace.

Junk Email Filter - Front End Spam / Virus Filtering for your Existing Email Server. We filter the spam and viruses and pass the good email on to you., Junk Email Filter is a front end hosted spam filtering and virus blocking service. Worlds most advanced spam fighting tools.

Symantec Messaging Gateway protects email against spam, malware, targeted attacks and provides advanced content filtering, data loss prevention, and email encryption.

N-able SpamExperts offers professional anti-spam email filtering and archiving for Web hosting providers, Internet Service Providers and Telcos.

Cloudmark is a trusted leader in intelligent threat protection against known and future attacks, safeguarding 12 percent of the world’s inboxes from wide-scale and targeted email threats.

Fortinet's Email Security Solutions provides protection for your critical business information. Learn how to send Secure Email Gateways (SEG) with FortiMail.

PhishLabs provides Digital Risk Protection through curated threat intelligence and complete mitigation for web, social, and email threats.

Fast, secure, and sustainable email services provided by email professionals. Powerful Email and Domain Hosting for businesses and organizations.

Mimecast brand protection services combine machine learning and targeted scans to identify potential attacks reduce compromise. Learn more.

Advanced email protection to prevent credential phishing, business email compromise, account takeover, and more.

The award-winning Clearswift Secure Email Gateway offers an unprecedented level of email security, including cyberattack protection and data loss prevention.

IRONSCALES’ cloud email security software is an AI-powered email platform for enterprise organizations. Our self-learning service protects against advanced email attacks that bypass traditional defenses.

The most comprehensive protection against traditional and targeted attacks. Blocks spam, phishing, and advanced persistent threats (APTs). Flexible hybrid SaaS deployment option.

With Darktrace's self-learning cyber security AI, you're protected against future email attacks that aren’t limited to past attack rules & data. Get a demo.

Be spam free today! Protect your domain from spam and viruses with SpamHero. Removes over 98% of the spam and viruses sent to your domain. Setup takes 5 minutes.

Kaspersky Security for Microsoft Office 365 protects your cloud-oriented enterprise from email-borne threats. Learn how it uses advanced next generation techniques to stop phishing, ransomware, malicious attachments, spam and business email compromise (BEC).

Material is a multi-layered detection and response toolkit for email. It stops sophisticated email-based attacks and contains the blast radius of compromised accounts.

DNS filtering and DNS web filtering solution providing AI driven threat protection and advanced web content controls for MSPs.

DMARC is the leading email authentication protocol. Understand how DMARC authentication blocks spoofed emails and phishing attempts & keeping your inbox safe.

Cloud Email Protection, the integrated cloud email security solution from Fortra, stops advanced threats that bypass security defenses and make it into inboxes.

Get advanced threat protection with Microsoft Defender for Office 365 and protect against cyber threats like business email compromise and phishing.

Save on infrastructure and maintenance costs. Choose your data centre (US, EU, APAC). AWS native cloud email hosting.

SaaS Defense is an advanced threat protection [ATP] and spam filtering solution that detects zero-day threats.

Graphus is automated email security software, providing security for Google Workspace & Microsoft 365 users against phishing & social engineering attacks.

Protect your organization from today’s advanced email threats, business email compromise (BEC), and consumer phishing with Proofpoint's Email Fraud Defense.

SMTP email relay service that is powerful, secured and reliable. Send better transactional emails and integrate easily with our email API.

Secure your business with total messaging control. Cybonet stops the majority of malicious email threats at your network's perimeter while simultaneously providing a range of additional options for comprehensive security and messaging control.

Encrypt ANY Business or Personal Email in a few minutes. No need to switch email providers. Free encrypted email for Gmail, Yahoo, Microsoft.

Discover top-tier cyber security solutions from Eunetic GmbH, including SSL certificates, email filters, Anycast DNS, and LEI services.

Discover Echoworx, the industry-leading provider of cutting-edge email encryption to safeguard your sensitive communications

Protect your customers with artificial intelligence with real-time spear phishing protection and cyber fraud defense to prevent personalized attacks.

Skysnag is the most autonomous DMARC solution. Protect your domain with Skysnag's self serve & managed services.

Hushmail - Encrypted Email & Secure Web Forms. Our healthcare plans come configured for HIPAA compliance right out of the box.

Stop advanced email threats and optimize security operations with AI-powered email security that adapts to your organization. Available for on-premise and Microsoft 365.

Send HIPAA compliant emails free for 14 days.

Cisco Secure Email Encryption Service gives senders enhanced security and reliable controls for traditional email tools.

Secure email encryption helps protect individuals, SMBs, and Enterprise organizations. Learn more about compliance & secure email encryption.

SMTP2GO is the scalable, reliable email deliverability solution. Worldwide servers, a robust API, and powerful reporting set us apart. Try our free plan!

MailChannels ensures your customers' emails are always delivered. Trusted by the fastest-growing hosting providers.

Ad-free Business Email Hosting with a clean, easy-to-use interface. Integrated Business Calendar, Contacts, Notes, Tasks. Free for up to 5 users.

Host your professional email on a secure, privacy-guaranteed, and ad-free email hosting service built-in with features like email marketing services can do.

REVE Antivirus protects users from online threats. Apart from best virus protection, it provides email security and safety from phishing scams.

OX Cloud Email - Easy, Fast, Secure - Powerful email built for business

dmarcian is dedicated to helping solve email identity crisis by giving internet domain owners control over their email domains with DMARC.

How it works: Avanan adds an invisible layer of full-suite security for cloud email/collaboration, like Office 365, to create universal threat management.

SPAMfighter Exchange Module is the award winning Anti Spam and Virus for Exchange Server 2000 - 2016. Try FREE for 30 days.

Cost-effective, secure hosted email: mailboxes, calendar and address book

Spambarrier ist ein Dienst, der Ihre E-Mails filtert, bevor sie Ihren Mailserver erreichen. Der einfache Weg, sich vor Spam zu schützen Hosting sicher in Deutschland und datenschutzkonform.

BELxpress Email Hosting Solution

Secure your communications with DataMotion's email encryption and document exchange. Seamlessly integrate with the apps you're most familiar with.

Set up email forwarding in seconds and start receiving and sending emails with your domain name. Absolutely free. No registration. 24/7 Support.

Webservio has been solving business IT challenges for over 20 years with cost-effective and secure technology solutions. We specialize in customized email and web hosting services that can be combined with well-known products like Office 365, G Suite, Exchange, Mimecast, and more.

A powerful email server that blocks 99% of junk emails. It also enables encrypted emailing with large sized file sharing and helps in preventing IP leakages

We’re powering the next generation of secure email communications for your organization, preventing data leaks & empowering people to work securely.

Discover Alinto, email solutions for organisations and service providers. ensure the deliverability, management and the security of your emails.

Complete protection against phishing, malware or spam, adding an extra layer of cyber defense for your Microsoft 365, Google Workspace cloud apps and email.

Niezawodne Email API i SMTP w chmurze. Najwyższa dostarczalność i szczegółowa analityka wiadomości email wysyłanych z Twojego systemu lub aplikacji.

EmailConsul offers comprehensive email deliverability solutions, including DMARC monitoring, spam traps detection, seedlisting and inbox placement tests, Google Postmaster integration, SNDS integration, IP and domain blocklist monitoring, lookalike detection, and logs monitoring.

Protect your business from viruses with AVG Internet Security Business Edition. Includes email and server security, business antivirus, and firewall.

Watch the Solution Overview - Mailbox Continuity video.

Advanced URL Filtering provides best-in-class security, including the industry’s first real-time web protection engine and comprehensive phishing protection.

Exceptional DRaaS service at Storage Guardian. Offering Veeam Cloud solutions and Dropbox migration for SMBs. Get a detailed estimate now.

Forget all about malware, phishing and identity theft. Guardio cleans, protects, and keeps you and your browser safe.

Harmony Mobile (Formerly Sandblast Mobile), Check Point’s Mobile Threat Defense solution, is designed to keep corporate data safe by securing mobile devices.

Security in the industry for mobile operators, internet service providers, and hosting providers Cloudmark Authority utilizes a unique combination of proprietary…

Stop malware before it enters your network with secure DNS protection. Webroot offers web security with URL filtering to protect your business.