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Email Security Software with API (2026)

Last updated: April 2026

Key features of Email Security Software

Based on GetApp's analysis of verified user reviews collected between July 2021 and August 2024.

  • Email Attachment Protection: Users value encryption, customizable blocking, and sandbox features for secure and straightforward handling of sensitive attachments. 95% of reviewers rated this feature as important or highly important.
  • Threat Response: Reviewers appreciate the quick, automated threat detection and response, which helps reduce IT resources and increases security. 95% of reviewers rated this feature as important or highly important.
  • Threat Protection: Users highlight strong phishing and malware detection, which effectively prevents threats from reaching inboxes and ensures data security. 94% of reviewers rated this feature as important or highly important.
  • Spam Blocker: Reviewers note effective spam filtering, customizable rules, and reduced clutter, making inbox management easier and more efficient. 94% of reviewers rated this feature as important or highly important.
  • Encryption: Users emphasize the importance of end-to-end encryption for securing sensitive communications, with ease of use being a crucial factor. 92% of reviewers rated this feature as important or highly important.
  • Reporting/Analytics: Reviewers find value in detailed reports and analytics that provide insights into email threats and help inform security decisions. 81% of reviewers rated this feature as important or highly important.
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Features

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User rating

64 software options

Libraesva Email Security logo

Libraesva Email Security

Exceptional Email Security

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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 email gateway with Libraesva’s unique Adaptive Trust Engine.

Read more about Libraesva Email Security

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Fortra’s DMARC Protection logo

Fortra’s DMARC Protection

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Software for protection from spoofing and phishing attacks

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Agari Brand Protection is a simple anti-phishing solution that helps enterprises prevent and recover from email spoofing attacks. Businesses can block phishing attacks with DMARC, SPF, DKIM, and other email authentication services.

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Heimdal Email Security logo

Heimdal Email Security

Email Protection in a Redefined Spam Filter

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Heimdal Email Security is an email protection solution that combines advanced spam filtering with robust malware prevention through a multitude of modern technologies.

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Fidelis Network logo

Fidelis Network

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Fidelis' NDR: Proactive Defense, Rapid Threat Response.

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Fidelis Network, an NDR solution, delivers real-time threat detection & response. With Deep Session Inspection®, it provides full visibility into network, email, and web traffic, including encrypted data. Contextual analysis & threat intelligence reduce alert fatigue & enhance risk management.

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ConnectWise SIEM logo

Threat detection and response management software

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ConnectWise SIEM is a threat detection and response management software designed to help enterprises create, launch, and manage cybersecurity programs. The platform enables organizations to identify potential threats and malicious activities across networks & connected devices via a unified portal.

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DeliverySlip logo

Secure electronic signature, email encryption & file sharing

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DeliverySlip is a cloud-based email security, file sharing and electronic signature solution which offers industrial-grade email encryption, secure file transfer, electronic approvals, web forms, bulk send, and more. The software works inside Microsoft Outlook, Gmail, and various other applications.

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Flashstart logo

DNS filtering software provider

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FlashStart is at the forefront of cyber security innovation, leveraging AI-powered DNS intelligence to stay one step ahead of evolving threats.

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DMARC Manager logo

Protect your Email Domains against Email Abuse and Phishing.

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DMARC Advisor specializes in empowering email security professionals. Implementing DMARC is an essential measure that fortifies defenses against evolving email threats. With DMARC, you gain the ability to authenticate email senders, prevent phishing attacks and more.

Read more about DMARC Manager

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StrongestLayer logo
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AI-native email security platform

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StrongestLayer’s AI Email Security leverages advanced Large Language Models to understand the true intent behind every message, instantly detecting and blocking sophisticated phishing, zero-day exploits, and BEC scams. Seamlessly integrated with Microsoft 365 and Google Workspace.

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Zivver logo

Email Security Made Effortless

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Zivver is email security software which helps enterprises transfer business documents and ensure secure e-mail communication. It allows users to retract emails, view risks, causes, and impact of data breaches, configure workflows, and generate custom reports.

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INLYSE Malware.AI logo

VISUAL AI BASED MALWARE DETECTION

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INLYSE Malware.AI is a revolutionary visual AI-based malware detection solution that utilizes cutting-edge technology to convert files into graphical representations and analyze them comprehensively for any signs of malware.

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SafeGuard Cyber Security logo

Cybersecurity platform with NLU analytics

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SafeGuard Cyber Security is a cybersecurity platform that helps businesses protect their communications, employees, and data against social engineering attacks and other threats.

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Graphus logo

Cloud-based email security software

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Graphus is a cloud-based anti-phishing software, which helps protect organizations against email attacks, credential theft, malware, ransomware, identity spoofing, brand impersonation, business email compromise (BEC), account takeover (ATO) and other threats.

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Abnormal AI logo

A Fundamentally Different Approach to Email Security

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Abnormal provides total protection against the widest range of attacks including phishing, malware, ransomware, social engineering, executive impersonation, supply chain compromise, internal account compromise, spam, and graymail.

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IRONSCALES logo

We catch the phish that others miss!

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We ensure your inboxes are uncompromised and your team is unburdened.

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Datto SaaS Defense logo

Threat protection for Microsoft 365

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Datto Saas Defence is a cloud-based Microsoft 365 protection against malware, phishing attacks and business email compromise (BEC).

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Cypherdog Encryption logo

One click. Complete protection.

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Cypherdog Encryption (CE) provides the ability to encrypt and decrypt e-mails with attachments with confirmation of the identity of the parties to the communication.

No "trusted" third party, zero-knowledge security model, asymmetric encryption.

Read more about Cypherdog Encryption

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DNSFilter logo

Cloud-based cybersecurity and network monitoring platform

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DNSFilter is a cybersecurity management software that enables enterprises, K-12 schools, and universities to detect online security threats and malware using artificial intelligence (AI) technology, machine learning (ML) algorithms, and content filtering capabilities.

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Sealit logo

Full Security - Just 1 Click.

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Sealit protects your data, no matter how it's shared. End-to-end email and file encryption for small businesses or individuals.

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Red Sift OnDMARC logo

Automated DMARC software to stop phishing & spoofing attacks

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Red Sift OnDMARC shuts down the exact impersonation of email-sending domains used in cyber attacks, phishing, and scam emails. It also increases the deliverability of authorized emails and protects brand reputations.

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Vade logo

Collaborative cybersecurity based on IA, enhanced by people.

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Vade is a global cybersecurity company specializing in the development of collaborative email security solutions. Combining human and machine intelligence, Vade's solutions form a cybersecurity alliance that is powered by AI and enhanced by people.

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PowerDMARC logo

Email security and anti-spam software

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PowerDMARC is a cloud-based email security software designed to help businesses secure emails from spam, spoofing, phishing, and other online threats. The platform utilizes artificial intelligence (AI) technology to automatically convert XML data into charts, numbers, and graphs, enabling users to view and evaluate related metrics.

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Cloudflare logo

Performance & Security for Any Website

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Cloudflare protects and accelerates million of website online using a single change to your DNS by offering CDN functionality and advanced security.

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Avanan logo

Email Security — Reinvented

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Cloud Security, Cloud Email Security, Office 365 Security, Phishing, BEC, Anti-phishing, Malware, Email Account Breach, Business Email Compromise

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Confidencial logo
(0)

Cloud-based data protection and security solution

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Confidencial is a cloud-based document security solution that enables users to protect sensitive data with granular encryption controls.

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