# Best Email Anti-spam Software - Page 4

*By [Lauren Worth](https://research.g2.com/insights/author/lauren-worth)*


Email anti-spam technology is used to prevent malicious content from being delivered via email. These tools scan email messages, content, and attachments for potential threats and then filter or block suspicious messages from being delivered. Administrators can whitelist approved content or senders while also blacklisting or blocking communications from suspicious parties.

Companies use email anti-spam tools to prevent their employees from being misled through phishing attacks or compromising local networks when downloading malware. They also prevent employees from delivering information to misidentified users, saving the business from potential breaches.

All [secure email gateway software](https://www.g2.com/categories/secure-email-gateway) possesses anti-spam or email filtering capabilities, but those tools also have additional features for comprehensive spam filtering, email encryption, and information archiving.

To qualify for inclusion in the Email Anti-Spam category, a product must:

- Filter email content for malware or viruses
- Identify mislabeled senders or potential phishing attempts
- Provide blacklisting or blocking capabilities to restrict communication with suspicious parties





## Top Email Anti-spam Software at a Glance
| # | Product | Rating | Best For | What Users Say |
|---|---------|--------|----------|----------------|
| 1 | [Proofpoint Core Email Protection](https://www.g2.com/products/proofpoint-core-email-protection/reviews) | 4.6/5.0 (589 reviews) | Perimeter spam and phishing filtering with post-delivery remediation | "[Robust Email Security with Some Rule Management Hurdles](https://www.g2.com/survey_responses/proofpoint-core-email-protection-review-12792121)" |
| 2 | [Check Point Email Security](https://www.g2.com/products/check-point-email-security/reviews) | 4.6/5.0 (487 reviews) | API-inline phishing prevention for Microsoft 365 | "[Accuracy Redefined, Perfect for Email Security](https://www.g2.com/survey_responses/check-point-email-security-review-12713186)" |
| 3 | [Microsoft Defender for Office 365](https://www.g2.com/products/microsoft-microsoft-defender-for-office-365/reviews) | 4.5/5.0 (282 reviews) | Microsoft 365-native phishing and email threat defense | "[Effective Email Security with Excellent Microsoft 365 Integration](https://www.g2.com/survey_responses/microsoft-defender-for-office-365-review-12933331)" |
| 4 | [Abnormal AI](https://www.g2.com/products/abnormal-ai/reviews) | 4.8/5.0 (77 reviews) | API-native BEC and phishing auto-remediation | "[Flawless Protection with Insightful Reporting](https://www.g2.com/survey_responses/abnormal-ai-review-12811299)" |
| 5 | [Paubox](https://www.g2.com/products/paubox/reviews) | 4.9/5.0 (585 reviews) | Frictionless inbound filtering with automatic outbound encryption | "[Effortless Automatic Email Encryption with Excellent Paubox Support](https://www.g2.com/survey_responses/paubox-review-12903747)" |
| 6 | [Libraesva Email Security](https://www.g2.com/products/libraesva-email-security/reviews) | 4.8/5.0 (103 reviews) | Low-false-positive email threat filtering with M365 | "[Effective and Easy-to-Manage Email Security](https://www.g2.com/survey_responses/libraesva-email-security-review-11433905)" |
| 7 | [SaneBox](https://www.g2.com/products/sanebox/reviews) | 4.8/5.0 (222 reviews) | Sender-trained inbox triage and spam quarantine | "[The most amazing inbox manager! Saves so much time!](https://www.g2.com/survey_responses/sanebox-review-7539705)" |
| 8 | [IRONSCALES](https://www.g2.com/products/ironscales/reviews) | 4.7/5.0 (63 reviews) | AI-automated phishing detection with inbox remediation | "[Advanced AI Protection and Realistic Phishing Training That Truly Improves Behavior](https://www.g2.com/survey_responses/ironscales-review-12780659)" |
| 9 | [Hornetsecurity 365 Total Protection](https://www.g2.com/products/hornetsecurity-365-total-protection/reviews) | 4.6/5.0 (65 reviews) | Microsoft 365-native email filtering with unified backup | "[Multi-Tenant Time Saver with Reliable Anti-Spam and Smooth Microsoft 365 Integration](https://www.g2.com/survey_responses/hornetsecurity-365-total-protection-review-12667340)" |
| 10 | [Valimail](https://www.g2.com/products/valimail/reviews) | 4.5/5.0 (459 reviews) | Automated DMARC enforcement and spoofing prevention | "[Valimail: Essential for Email Security and Confidence](https://www.g2.com/survey_responses/valimail-review-12705568)" |

---
## What Are the Most Common Questions About Email Anti-spam Software?
*AI-generated · Last updated: May 26, 2026*
### What Email Anti Spam platforms with the best track record on false-positive reduction in large organizations?
Based on G2 reviews, buyers looking for false-positive reduction in larger environments most often describe a balance between strong filtering and fewer disruptions from Check Point Harmony Email & Collaboration, Abnormal AI, and Libraesva Email Security. According to verified users, Check Point is repeatedly praised for rarely blocking legitimate mail, while Abnormal AI reviewers say it reduces manual queue handling by accurately separating malicious and legitimate messages after a learning period. G2 reviewers mention Libraesva for low false-positive filtering and strong spam and phishing control, especially where administrators want clear visibility and easy tuning. Reviewers also note that some products still require policy adjustment, especially during early deployment or in more complex environments.

**Here are some of the top-rated products on G2:**

- [Check Point Harmony Email & Collaboration](https://www.g2.com/products/check-point-harmony-email-collaboration/reviews/check-point-harmony-email-collaboration-review-12713186) – reviewers say it rarely blocks legitimate mail while still catching phishing, spam, and malware.
- [Abnormal AI](https://www.g2.com/products/abnormal-ai/reviews/abnormal-ai-review-12114161) – users highlight minimal false positives after the learning period across multiple tenants and platforms.
- [Libraesva Email Security](https://www.g2.com/products/libraesva-email-security/reviews/libraesva-email-security-review-12693025) – reviewers emphasize low false positives alongside strong spam detection and reporting.


### Which Email Anti Spam solutions reduce IT admin workload while maintaining strict phishing protection?
Based on G2 reviews, [Check Point Harmony Email & Collaboration](https://www.g2.com/products/check-point-harmony-email-collaboration/reviews/check-point-harmony-email-collaboration-review-12713186) stands out most clearly for reducing admin effort while keeping phishing defenses strong. According to verified users, teams describe simple setup, easy policy management, and less manual review because phishing, spam, fake links, and malicious attachments are filtered automatically. G2 reviewers mention that it helps reduce help desk tickets, saves IT time, and improves visibility without disrupting email flow. Reviewers do mention that initial policy tuning and alert noise can require attention in some environments, but the overall pattern in recent reviews is that administrators spend less time manually checking suspicious messages once the platform is in place.


### What Email filtering that blocks phishing attempts without trapping legitimate customer communication for mid-market companies balancing?
Based on G2 reviews, products most often associated with strong phishing blocking and fewer interruptions to legitimate communication include Check Point Harmony Email & Collaboration, Proofpoint Core Email Protection, and Paubox. According to verified users, Check Point is frequently described as catching phishing and malware while rarely quarantining good mail compared with previous tools. G2 reviewers mention Proofpoint for strong threat detection, though some teams report occasional false positives that require manual release. Paubox reviewers highlight secure communication and phishing protection, but some users mention valid emails can be blocked in patient-heavy workflows. For mid-market buyers, the common theme in reviews is to prioritize products that combine strong filtering with clear quarantine controls and manageable policy tuning.


### What Email filtering tools ranked for reliable spam blocking when managing multi-tenant enterprise productivity suites 365 environments?
Based on G2 reviews, the strongest options for reliable spam blocking in Microsoft 365-heavy and multi-tenant environments are Check Point Harmony Email & Collaboration, Hornetsecurity 365 Total Protection, and Microsoft Defender for Office 365. According to verified users, Check Point is praised for smooth API-based deployment with Microsoft 365 and for filtering phishing, spam, and malicious links without major mail-flow disruption. G2 reviewers mention Hornetsecurity for centralized multi-tenant policy control and dependable anti-spam filtering across tenants. Microsoft Defender for Office 365 is valued for native ecosystem integration, message tracing, and threat investigation within Microsoft environments. Reviewers across all three also note that tuning and navigation can take time, especially in more complex administrative setups.


### What highest rated Email Anti Spam platforms for healthcare practices requiring minimal false alarms based on user reviews?
Based on G2 reviews, healthcare-focused buyers looking for minimal false alarms most often surface Paubox, Proofpoint Core Email Protection, and Libraesva Email Security. According to verified users, Paubox is widely used for HIPAA-focused communication and is valued for secure messaging that fits directly into existing inbox workflows, though some users note occasional valid emails landing in quarantine. G2 reviewers mention Proofpoint for strong protection against phishing, spoofing, and malicious attachments, but some organizations still report occasional legitimate messages being flagged. Libraesva reviewers repeatedly emphasize low false positives, easy administration, and strong protection against phishing and spam. Across these reviews, the best fit depends on whether the priority is healthcare compliance workflow, stronger enterprise controls, or minimizing mailbox disruptions.


### What Most trusted Email Anti Spam software by IT Security Managers at financial services firms based on user reviews?
Based on G2 reviews, trusted options for teams handling sensitive financial-style risk patterns most often include Abnormal AI, Proofpoint Core Email Protection, and Check Point Harmony Email & Collaboration. According to verified users, Abnormal AI is praised for detecting sophisticated phishing, vendor fraud, account takeovers, and behavior-based attacks that traditional gateways missed. G2 reviewers mention Proofpoint for strong perimeter defense, attachment and link vetting, BEC detection, and detailed threat visibility. Check Point reviewers highlight phishing prevention, account takeover protection, and policy flexibility across cloud collaboration tools. While the review export does not consistently identify many financial services companies by segment, the trust signals that stand out most are reduced manual review, strong impersonation defense, and reliable handling of advanced phishing attempts.


### What Email Anti Spam platforms that reliably catch advanced phishing and ransomware threats without overwhelming admin queues?
Based on G2 reviews, buyers looking for advanced threat coverage without heavy queue management most often compare Abnormal AI, Proofpoint Core Email Protection, and Sublime Email Security Platform. According to verified users, Abnormal AI is repeatedly described as highly accurate, with less time spent reviewing queues, fewer manual releases, and strong detection of phishing, vendor fraud, and account compromise. G2 reviewers mention Proofpoint for consistent blocking of phishing, malware, spoofing, and malicious attachments, although some teams report occasional quarantine tuning work. Sublime reviewers highlight transparent detections, automated remediation, and reduced manual investigation time for user-reported phishing. Across the reviews, the strongest signals come from products that combine accurate detections with automation and clear admin workflows.


### What best Email Anti Spam software for healthcare and finance teams managing HIPAA-compliant communication?
Based on G2 reviews, healthcare and similarly regulated teams most often surface Paubox, Proofpoint Core Email Protection, and Heimdal when they need strong email protection with secure communication workflows. According to verified users, Paubox is especially associated with HIPAA-compliant email, encrypted communication, and an experience that does not require recipients to use extra portals or logins. G2 reviewers mention Proofpoint for blocking phishing, malware, spoofing, and suspicious attachments in security-sensitive environments. Heimdal reviewers describe bundled email and endpoint protection that helps isolate phishing and ransomware-targeted emails. Review patterns suggest Paubox is strongest for seamless compliant communication, while Proofpoint and Heimdal are more frequently praised for broader threat filtering and administrator controls.

**Here are some of the top-rated products on G2:**

- [Paubox](https://www.g2.com/products/paubox/reviews/paubox-review-12459860) – reviewers use it for HIPAA-compliant encrypted email that fits into existing inbox workflows.
- [Proofpoint Core Email Protection](https://www.g2.com/products/proofpoint-core-email-protection/reviews/proofpoint-core-email-protection-review-12429517) – users highlight phishing, malware, spoofing, and malicious link protection for sensitive organizations.
- [Heimdal](https://www.g2.com/products/heimdal/reviews/heimdal-review-12683374) – reviewers describe isolating phishing and ransomware-targeted emails while bundling email and endpoint security.


### Which Email Anti Spam solutions offer granular policy controls for different departments and compliance zones?
Based on G2 reviews, Check Point Harmony Email & Collaboration, Proofpoint Core Email Protection, and Libraesva Email Security are the products most often linked with granular controls. According to verified users, Check Point is praised for policy flexibility, DLP features, and visibility across email and collaboration tools, though some reviewers say advanced settings can be noisy or complex at first. G2 reviewers mention Proofpoint for customizable rules, internal DMARC policies, and protection layers that support large organizations with varied requirements, even if rule management can be spread across multiple areas. Libraesva reviewers highlight centralized administration, customizable rules, and detailed message analysis. The overall review pattern suggests these tools are strongest when buyers need tighter control across user groups, mail flows, and security policies.


### What Email filtering software that prevents legitimate emails from customer communication from being mistakenly blocked?
Based on G2 reviews, buyers focused on preserving legitimate customer communication most often highlight Check Point Harmony Email & Collaboration, Abnormal AI, and Paubox. According to verified users, Check Point is frequently described as more accurate than previous solutions, with rare legitimate mail quarantines and fewer workflow disruptions. G2 reviewers mention Abnormal AI for accurately distinguishing genuine and malicious messages, reducing queue management and manual release work after deployment. Paubox reviewers value unobtrusive secure email workflows for client communication, though some users still report valid emails being blocked and needing unblocking options. Across reviews, the best pattern for avoiding mistaken blocks is strong phishing protection paired with low false-positive reports and easy quarantine review when edge cases appear.




## G2 Grid® for Email Anti-spam Software
![G2 Grid® for Email Anti-spam Software plotting products by satisfaction and market presence](https://www.g2.com/categories/email-anti-spam/grids.png?focus%5B%5D=30562&focus%5B%5D=112257&focus%5B%5D=115555&focus%5B%5D=118732&focus%5B%5D=25519&focus%5B%5D=129100&focus%5B%5D=15605&focus%5B%5D=127324)
Highlighted products: Proofpoint Core Email Protection, Check Point Email Security, Microsoft Defender for Office 365, Abnormal AI, Paubox, Libraesva Email Security, SaneBox, and IRONSCALES.
Underlying data: [Grid® JSON](https://www.g2.com/categories/email-anti-spam/grids.json?focus%5B%5D=proofpoint-core-email-protection&focus%5B%5D=check-point-email-security&focus%5B%5D=microsoft-microsoft-defender-for-office-365&focus%5B%5D=abnormal-ai&focus%5B%5D=paubox&focus%5B%5D=libraesva-email-security&focus%5B%5D=sanebox&focus%5B%5D=ironscales)


## How Many Email Anti-spam Software Products Does G2 Track?
**Total Products under this Category:** 119

### Category Stats (Jul 2026)
- **Average Rating**: 4.46/5 The average rating of products in this category, based on all submitted ratings
- **Top Trending Product**: Mailinblack (+0.73%) - Among all products in this category, Mailinblack recorded the largest rating increase compared to last month
*Last updated: July 13, 2026*


## How Does G2 Rank Email Anti-spam Software Products?

**Why You Can Trust G2's Software Rankings:**

- 30 Analysts and Data Experts
- 5,300+ Authentic Reviews
- 119+ Products
- Unbiased Rankings

G2's software rankings are built on verified user reviews, rigorous moderation, and a consistent research methodology maintained by a team of analysts and data experts. Each product is measured using the same transparent criteria, with no paid placement or vendor influence. While reviews reflect real user experiences, which can be subjective, they offer valuable insight into how software performs in the hands of professionals. Together, these inputs power the G2 Score, a standardized way to compare tools within every category.


## Which Email Anti-spam Software Is Best for Your Use Case?

- **Leader:** [Proofpoint Core Email Protection](https://www.g2.com/products/proofpoint-core-email-protection/reviews)
- **Highest Performer:** [Libraesva Email Security](https://www.g2.com/products/libraesva-email-security/reviews)
- **Easiest to Use:** [Libraesva Email Security](https://www.g2.com/products/libraesva-email-security/reviews)
- **Top Trending:** [Sublime Email Security Platform](https://www.g2.com/products/sublime-email-security-platform/reviews)
- **Best Free Software:** [Proofpoint Core Email Protection](https://www.g2.com/products/proofpoint-core-email-protection/reviews)


---

**Sponsored**

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Sublime’s agentic platform stops more email attacks with less work. Our AI agents work like a digital SOC team in your environment, triaging and blocking advanced threats while adapting protections at adversary speed. It provides full transparency and automation by default, with control on demand for advanced teams, eliminating vendor bottlenecks or one-size-fits-all limits. Core Outcomes (The What): - Stop More Attacks with Fewer False Positives - block sophisticated threats (BEC, novel phishing, QR-based phishing) and reduce the false positives that waste time and disrupt workflows. Our tailored protections deliver a demonstrably higher catch rate, validated by the world's most demanding security teams. - Automate the Abuse Mailbox - Our Autonomous Security Analyst (ASA) automates triage, investigation, and remediation of user-reported email, cutting MTTR from hours to seconds and freeing your SOC team to focus on the threats that matter most. - Adapt Defenses Automatically. - When a missed attack is identified, we can create new coverage in hours. Our Autonomous Detection Engineer (ADÉ) generates, backtests, and deploys org-specific coverage, eliminating vendor ticket limbo. Differentiators (The How): - A Team of Agents using AI, Not Just a Black Box - Sublime deploys a team of specialized agents - like an analyst and a detection engineer - that use AI to protect, triage, and adapt your defenses. Unlike an opaque, monolithic AI, our agentic approach provides full transparency into every action, with visible decision history, message lineage, and backtests. - Org-Specific Protection, Not One-Size-Fits-All - Our Distributed Detection Model (DDM) is the foundation of our platform. It runs per-environment coverage that adapts to the unique attacks you face, allowing us to safely deploy protections that would be noisy in global models - something centralized systems simply can’t support. This means higher day-one efficacy and fewer false positives. - Autonomous by Default, Control on Demand - By stopping more attacks and reducing false positives, Sublime delivers a superior autonomous experience that requires less work. For advanced teams, the platform is fully extensible, allowing you to author your own detections and hunt for threats with a level of precision that one-size-fits-all solutions can't. Innovative organizations including Spotify, Snowflake, Brex, Elastic, Compass, Anduril, SentinelOne, and others rely on Sublime to secure the business and keep teams focused on strategic defense. 🔗 Learn how Sublime helps security teams stop more attacks with less work at sublime.security



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---

## What Are the Top-Rated Email Anti-spam Software Products in 2026?
### 1. [Spamsentinel](https://www.g2.com/products/duocircle-llc-spamsentinel/reviews)
SpamSentinel is an advanced email security solution designed to protect your HCL Domino environment from spam, phishing, and other email threats. Reliable & Secure – It provides real-time spam filtering, malware scanning, and anti-phishing protection to keep your organization’s email safe and efficient. Seamlessly integrating with HCL Domino, SpamSentinel is easy to deploy and highly effective at reducing unwanted email clutter.


**Average Rating:** 5.0/5.0
**Total Reviews:** 1
**How Do G2 Users Rate Spamsentinel?**

- **Has the product been a good partner in doing business?:** 10.0/10 (Category avg: 9.1/10)
- **Quality of Support:** 10.0/10 (Category avg: 9.0/10)
- **Ease of Admin:** 10.0/10 (Category avg: 8.9/10)
- **Ease of Use:** 10.0/10 (Category avg: 9.0/10)

**Who Is the Company Behind Spamsentinel?**

- **Seller:** [DuoCircle LLC](https://www.g2.com/sellers/duocircle-llc)
- **Year Founded:** 2014
- **HQ Location:** San Diego, CA
- **Twitter:** @duocirclellc (130 Twitter followers)
- **LinkedIn® Page:** https://www.linkedin.com/company/duocircle/about (13 employees on LinkedIn®)

**Who Uses This Product?**
- **Company Size:** 100% Mid-Market


#### What Are Spamsentinel's Pros and Cons?

**Pros:**

- Customer Support (1 reviews)
- Deployment Ease (1 reviews)
- Easy Integrations (1 reviews)
- Setup Ease (1 reviews)



### What Do G2 Reviewers Say About Spamsentinel?
*AI-generated summary from verified user reviews*

**Pros:**

- Users value Spamsentinel's **exceptional customer support** , ensuring smooth setup and tailored solutions for specific needs.
- Users highlight the **deployment ease** of Spamsentinel, with excellent support facilitating seamless integration on diverse systems.
- Users value the **easy integrations** of Spamsentinel, appreciating tailored configurations and seamless operation across diverse systems.
- Users commend the **setup ease** of Spamsentinel, appreciating the excellent support for tailored configurations.


#### What Are Recent G2 Reviews of Spamsentinel?

**"[SpamSentinel just works](https://www.g2.com/survey_responses/spamsentinel-review-10928919)"**

**Rating:** 5.0/5.0 stars
*— Gary Y.*

[Read full review](https://www.g2.com/survey_responses/spamsentinel-review-10928919)

---



### 2. [VIPRE Email Cloud Add-on Solutions](https://www.g2.com/products/vipre-email-cloud-add-on-solutions/reviews)
VIPRE Email Cloud Add-on Solutions enhance the core capabilities of VIPRE's Email Security Cloud Edition by providing advanced features that bolster email protection and compliance. These add-ons are designed to address specific challenges in email security, ensuring comprehensive defense against evolving threats. Key Features and Functionality: - Attachment Sandboxing: This feature inspects email attachments in a secure virtual environment, detecting and neutralizing malicious payloads before they reach the recipient. - Email Archiving: Offers long-term storage of inbound and outbound emails, facilitating quick retrieval and compliance with regulatory requirements. - Email Encryption: Ensures the confidentiality of email communications by encrypting messages and attachments, accessible only through a secure portal by intended recipients. - Phishing Protection: Safeguards against deceptive emails containing malicious links by examining and neutralizing threats, even if the links become harmful after the email is received. Primary Value and User Solutions: VIPRE Email Cloud Add-on Solutions provide organizations with enhanced tools to combat sophisticated email threats, ensuring data integrity and regulatory compliance. By integrating these add-ons, businesses can proactively address vulnerabilities, protect sensitive information, and maintain uninterrupted communication channels. This comprehensive approach to email security empowers organizations to stay ahead of cyber threats and safeguard their digital assets effectively.


**Average Rating:** 4.0/5.0
**Total Reviews:** 1

**Who Is the Company Behind VIPRE Email Cloud Add-on Solutions?**

- **Seller:** [VIPRE Security](https://www.g2.com/sellers/vipre-security)
- **Year Founded:** 1994
- **HQ Location:** Clearwater, FL
- **Twitter:** @VIPRESecurity (8,293 Twitter followers)
- **LinkedIn® Page:** https://www.linkedin.com/company/11052300/ (233 employees on LinkedIn®)

**Who Uses This Product?**
- **Company Size:** 100% Enterprise



#### What Are Recent G2 Reviews of VIPRE Email Cloud Add-on Solutions?

**"[Vipre cloud security](https://www.g2.com/survey_responses/vipre-email-cloud-add-on-solutions-review-6621675)"**

**Rating:** 4.0/5.0 stars
*— Verified User in Information Technology and Services*

[Read full review](https://www.g2.com/survey_responses/vipre-email-cloud-add-on-solutions-review-6621675)

---


#### What Are G2 Users Discussing About VIPRE Email Cloud Add-on Solutions?

- [What is VIPRE Email Cloud Add-on Solutions used for?](https://www.g2.com/discussions/what-is-vipre-email-cloud-add-on-solutions-used-for)

### 3. [BAE Systems Email Security](https://www.g2.com/products/bae-systems-email-security/reviews)
Email Security (AV/AS) from BAE Systems reduces risk exposure and corporate liability by safeguarding emails with anti-virus and anti-spam technologies that block malicious software and spam at the gateway.



**Who Is the Company Behind BAE Systems Email Security?**

- **Seller:** [BAE Systems](https://www.g2.com/sellers/bae-systems-a8f5cb6b-ebbf-4b81-90df-cda9511f0020)
- **Year Founded:** 2016
- **HQ Location:** Falls Church, US
- **Twitter:** @BAES_Careers (1,914 Twitter followers)
- **LinkedIn® Page:** https://www.linkedin.com/company/1881 (16,720 employees on LinkedIn®)
- **Ownership:** LON: BA






### 4. [bt-Enterprise](https://www.g2.com/products/bt-enterprise/reviews)
bt-Enterprise is a network security software that eliminates risk and regains control of enterprise solutions for web and email filtering.



**Who Is the Company Behind bt-Enterprise?**

- **Seller:** [Burstek](https://www.g2.com/sellers/burstek)
- **HQ Location:** N/A
- **LinkedIn® Page:** https://www.linkedin.com/company/No-Linkedin-Presence-Added-Intentionally-By-DataOps (1 employees on LinkedIn®)






### 5. [Bulletproof Inbox](https://www.g2.com/products/bulletproof-inbox/reviews)
Bulletproof Inbox is a Gmail and Outlook email solution that optimizes your email experience by eliminating unwanted email. Our access control technology sits between your inbox and the sender, and allows only Approved Senders into your inbox. Unwanted emails are blocked, while new / unknown email is quarantined into an evaluating folder for later review. It's simple. There's no need for a new email, app or interface. Just manage your email as you normally would.



**Who Is the Company Behind Bulletproof Inbox?**

- **Seller:** [Bulletproof Inbox](https://www.g2.com/sellers/bulletproof-inbox)
- **Year Founded:** 2021
- **HQ Location:** N/A
- **LinkedIn® Page:** https://www.linkedin.com/company/bulletproof-inbox/about/ (3 employees on LinkedIn®)






### 6. [CanIt-PRO](https://www.g2.com/products/canit-pro/reviews)
CanIt-PRO is a spam protection solution that is being used by companies with low to many e-mail users.



**Who Is the Company Behind CanIt-PRO?**

- **Seller:** [Roaring Penguin Software](https://www.g2.com/sellers/roaring-penguin-software)
- **Year Founded:** 1999
- **HQ Location:** Ottawa, CA
- **Twitter:** @roaringpenguin (51 Twitter followers)
- **LinkedIn® Page:** https://www.linkedin.com/company/94362 (5 employees on LinkedIn®)






### 7. [Carrierzone](https://www.g2.com/products/carrierzone/reviews)
Carrierzone provides email abuse management solutions.



**Who Is the Company Behind Carrierzone?**

- **Seller:** [Carrierzone](https://www.g2.com/sellers/carrierzone)
- **HQ Location:** Pune, IN
- **LinkedIn® Page:** http://www.linkedin.com/company/carrier-zone (2 employees on LinkedIn®)






### 8. [Cloudmark Authority](https://www.g2.com/products/cloudmark-authority/reviews)
Cloudmark Authority provides the fastest and most accurate messaging security in the industry for mobile operators, internet service providers, and hosting providers.



**Who Is the Company Behind Cloudmark Authority?**

- **Seller:** [Proofpoint](https://www.g2.com/sellers/proofpoint)
- **Year Founded:** 2002
- **HQ Location:** Sunnyvale, CA
- **Twitter:** @proofpoint (31,157 Twitter followers)
- **LinkedIn® Page:** https://www.linkedin.com/company/proofpoint (5,146 employees on LinkedIn®)
- **Ownership:** NASDAQ: PFPT






### 9. [Cloudphish](https://www.g2.com/products/cloudphish/reviews)
Cloudphish is an anti-phishing software company based in Billerica, MA. Cloudphish is easy to install and protects your employees and customers from dangerous impersonation emails using the power of blockchain. Our software sends clear, visual feedback in the email header to alert users to any potential threats posed by an incoming message - in-context and in real-time. Cloudphish easily integrates with any existing email security software, working as the last line of defense to stop sophisticated phishing emails. Our plugin-based software works with Gmail and Outlook.com and all major browsers and devices. https://www.youtube.com/watch?v=8KWTQhpHdIw



**Who Is the Company Behind Cloudphish?**

- **Seller:** [Cloudphish](https://www.g2.com/sellers/cloudphish)
- **Year Founded:** 2019
- **HQ Location:** Bedford, US
- **LinkedIn® Page:** https://www.linkedin.com/company/cloudphish (2 employees on LinkedIn®)






### 10. [Cloud Protect](https://www.g2.com/products/cloud-protect/reviews)
Easiest to use email and account security for your small business. Never get hacked again with real-time breach detection, email spam filtering and hands-on managed security from a tier 1 Microsoft Partner. Real-time breach detection is monitored by our security experts. Get recommendations every month on how to improve your security with included support from our security experts. Automatically have spam moved to your Junk folder and emails scanned for viruses by adding the Spam Filter add-on.



**Who Is the Company Behind Cloud Protect?**

- **Seller:** [RyanTech](https://www.g2.com/sellers/ryantech)
- **Year Founded:** 1999
- **HQ Location:** Modesto, US
- **LinkedIn® Page:** https://www.linkedin.com/company/ryantech-inc- (22 employees on LinkedIn®)






### 11. [Cofense Vision](https://www.g2.com/products/cofense-vision/reviews)
Cofense provides phishing mitigation and detection for organizations.



**Who Is the Company Behind Cofense Vision?**

- **Seller:** [PhishMe](https://www.g2.com/sellers/phishme-b219efb4-9c59-4a17-8a8b-a45e5517a914)
- **Year Founded:** 2011
- **HQ Location:** Leesburg, Virginia, United States
- **LinkedIn® Page:** https://www.linkedin.com/company/11500065/ (303 employees on LinkedIn®)






### 12. [ContentCatcher](https://www.g2.com/products/contentcatcher/reviews)
ContentCatcher secure the business against phishing, spam, malware, malicious URLs and attachments with GDPR compliant,.



**Who Is the Company Behind ContentCatcher?**

- **Seller:** [ContentCatcher](https://www.g2.com/sellers/contentcatcher)
- **Year Founded:** 1999
- **HQ Location:** Hazlet, US
- **LinkedIn® Page:** http://www.linkedin.com/company/contentcatcher (1 employees on LinkedIn®)






### 13. [Cyber Security Software](https://www.g2.com/products/cyber-security-software/reviews)
Cyber Defender is your one-stop for all your cybersecurity needs. Our platform puts an end to the constant worry and ensures peace of mind when it comes to protecting your business. “I was looking for something easy to roll out and manage. Cyber Defender makes it so easy to do. It's a complete solution, including cloud and endpoints." Tiffany L., Business Owner



**Who Is the Company Behind Cyber Security Software?**

- **Seller:** [Cyber Defender](https://www.g2.com/sellers/cyber-defender)
- **Year Founded:** 2015
- **HQ Location:** Torrance, US
- **LinkedIn® Page:** https://www.linkedin.com/company/cyber-defender-pros (7 employees on LinkedIn®)






### 14. [Datatune Spam Filtering](https://www.g2.com/products/datatune-spam-filtering/reviews)
Datatune's hosted antispam solution is a cloud-based email security tool.



**Who Is the Company Behind Datatune Spam Filtering?**

- **Seller:** [Datatune](https://www.g2.com/sellers/datatune)
- **HQ Location:** N/A
- **LinkedIn® Page:** https://www.linkedin.com/company/No-Linkedin-Presence-Added-Intentionally-By-DataOps (1 employees on LinkedIn®)






### 15. [Deep Discovery Email Inspector](https://www.g2.com/products/deep-discovery-email-inspector/reviews)
Deep Discovery Email Inspector detects and blocks ransomware spear phishing emails through advanced analysis techniques for known and unknown attacks.



**Who Is the Company Behind Deep Discovery Email Inspector?**

- **Seller:** [TrendAI](https://www.g2.com/sellers/trendai)
- **Year Founded:** 1988
- **HQ Location:** Tokyo
- **LinkedIn® Page:** https://www.linkedin.com/company/4312/ (8,040 employees on LinkedIn®)
- **Ownership:** OTCMKTS:TMICY
- **Total Revenue (USD mm):** $1,515





#### What Are G2 Users Discussing About Deep Discovery Email Inspector?

- [What is Deep Discovery Email Inspector used for?](https://www.g2.com/discussions/what-is-deep-discovery-email-inspector-used-for)

### 16. [Diadem Advanced Email Anti Spam](https://www.g2.com/products/diadem-advanced-email-anti-spam/reviews)
Diadem's Advanced Email Anti-Spam solution is a comprehensive, cloud-based service designed to protect organizations from a wide range of email threats, including spam, viruses, phishing attempts, and malware. By integrating seamlessly with existing email infrastructures, it ensures that inbound and outbound communications remain secure, maintaining both network integrity and company reputation. The solution offers high filtering accuracy with minimal false positives, enhancing overall email reliability. Key Features and Functionality: - Inbound and Outbound Filtering: Effectively filters incoming and outgoing emails to prevent spam, viruses, and malicious attachments from entering or leaving the network. - Advanced Antivirus and Anti-Malware Protection: Utilizes cutting-edge scanning technologies to detect and neutralize threats before they reach the inbox. - High Filtering Accuracy: Employs proprietary IP-reputation systems and multiple content classifiers to achieve nearly 100% filtering accuracy with a very low false-positive rate. - Email Continuity: Ensures uninterrupted email access by queuing messages during server downtimes and automatically delivering them once the server is back online. - Comprehensive Reporting and Management: Provides detailed logs, web-based and IMAP-based quarantine access, and advanced filtering statistics for efficient monitoring and management. - Seamless Integration: Compatible with various mail servers, including Exchange, Zimbra, Postfix, Exim, qmail, and Lotus, and integrates with leading control panels. Primary Value and Problem Solved: Diadem's Advanced Email Anti-Spam solution addresses the critical need for robust email security in organizations. By effectively filtering out spam and malicious content, it safeguards networks from potential threats, reduces the risk of IP blacklisting, and maintains the organization's reputation. The solution also enhances employee productivity by minimizing the time spent dealing with unwanted emails and reduces infrastructure load by decreasing the volume of spam processed by internal servers. Additionally, its fully managed service simplifies email security management, allowing IT resources to focus on other strategic initiatives.



**Who Is the Company Behind Diadem Advanced Email Anti Spam?**

- **Seller:** [Diadem Technologies Pvt Ltd](https://www.g2.com/sellers/diadem-technologies-pvt-ltd)
- **Year Founded:** 2000
- **HQ Location:** Kolkata, IN
- **LinkedIn® Page:** https://www.linkedin.com/company/diadem-technologies/ (15 employees on LinkedIn®)






### 17. [Elpha Secure](https://www.g2.com/products/elpha-secure/reviews)
Elpha Secure offers an integrated cyber protection solution tailored for small and midsize businesses, combining advanced cybersecurity software with comprehensive cyber insurance coverage. This dual approach not only safeguards businesses against cyber threats but also ensures financial resilience in the event of an attack. By embedding proprietary security technology within each policy, Elpha Secure simplifies the process of obtaining and maintaining robust cyber defense, making it accessible and affordable for businesses that may lack extensive IT resources. Key Features and Functionality: - Comprehensive Cyber Insurance: Coverage includes protection against ransomware, data restoration, business interruption, cybercrime, hardware replacement, and network security and privacy liabilities. - Advanced Cybersecurity Software: Features encompass real-time threat monitoring, automated data backups, secure remote access with multi-factor authentication, and endpoint detection and response. - User-Friendly Platform: The solution offers a streamlined interface for managing security alerts, software updates, and policy details, ensuring ease of use for businesses without dedicated IT teams. - Rapid Deployment: Businesses can receive quotes in minutes through an AI-powered underwriting process and implement the security software swiftly with single-click installation. - 24/7 Expert Support: Access to a dedicated Security Operations Center ensures continuous monitoring and prompt assistance during incidents. Primary Value and Problem Solved: Elpha Secure addresses the critical need for small and midsize businesses to protect themselves against the increasing prevalence of cyberattacks. By integrating cybersecurity measures directly into the insurance policy, it reduces the complexity and cost associated with managing separate security solutions and insurance coverage. This holistic approach not only enhances a business's security posture but also ensures financial protection, thereby reducing the likelihood of operational disruptions and financial losses due to cyber incidents. Ultimately, Elpha Secure empowers businesses to operate confidently in the digital landscape, knowing they are comprehensively protected against evolving cyber threats.



**Who Is the Company Behind Elpha Secure?**

- **Seller:** [Elpha Secure](https://www.g2.com/sellers/elpha-secure)
- **Year Founded:** 2018
- **HQ Location:** New York, US
- **LinkedIn® Page:** https://www.linkedin.com/company/elpha-secure (53 employees on LinkedIn®)






### 18. [Email Hygiene and Validation](https://www.g2.com/products/email-hygiene-and-validation/reviews)
Impressionwise offers a professional data hygiene and email validation service featuring a multi-layered approach to identify, validate and protect against a wide range of e-mail-based threats.



**Who Is the Company Behind Email Hygiene and Validation?**

- **Seller:** [Impressionwise](https://www.g2.com/sellers/impressionwise)
- **Year Founded:** 2008
- **HQ Location:** Clearwater, US
- **Twitter:** @Impressionwise_ (143 Twitter followers)
- **LinkedIn® Page:** https://www.linkedin.com/company/22324576 (4 employees on LinkedIn®)






### 19. [EntrustedMail Email Threat Protection](https://www.g2.com/products/entrustedmail-email-threat-protection/reviews)
EntrustedMail's Email Threat Protection is a comprehensive solution designed to safeguard organizations from a wide array of email-borne threats, including phishing, spam, malware, viruses, ransomware, and zero-day attacks. By leveraging advanced artificial intelligence and predictive technologies, it ensures a secure and efficient email environment, allowing businesses to operate without the constant concern of cyber threats. Key Features and Functionality: - Spam Detection: Achieves a 99.99% spam catch rate with a minimal 0.003% false positive rate, effectively filtering out unwanted emails. - Zero-Day Attack Protection: Utilizes advanced AI to detect and mitigate new, previously unknown threats in real-time. - Phishing Protection: Employs real-time scanning to prevent whaling and spear-phishing attacks, safeguarding against targeted email fraud. - Attachment Sandboxing: Analyzes suspicious email attachments in a secure environment to detect and block advanced threats. - Malware Link Blocking: Inspects all email-contained links against known malware and ransomware sources to prevent malicious content access. - Email Quarantine: Allows administrators to review, release, or delete quarantined messages, with optional daily reports for end-users. - Virus Detection: Identifies and blocks viruses before they infiltrate the email system, preventing potential outbreaks. - Attachment Filtering: Enforces email attachment policies by blocking or quarantining dangerous files that violate organizational guidelines. - Recipient Verification: Confirms the existence of recipient accounts before delivering emails, reducing the risk of data leaks through misdirected messages. Primary Value and User Solutions: EntrustedMail's Email Threat Protection transforms email systems into secure and efficient communication tools by proactively defending against a spectrum of email threats. This solution not only enhances security but also boosts productivity by minimizing disruptions caused by malicious emails. Organizations benefit from reduced risk of data breaches, compliance with regulatory standards, and the assurance that their email communications are protected against evolving cyber threats.



**Who Is the Company Behind EntrustedMail Email Threat Protection?**

- **Seller:** [EntrustedMail](https://www.g2.com/sellers/entrustedmail)
- **Year Founded:** 2001
- **HQ Location:** Atlanta, US
- **LinkedIn® Page:** https://www.linkedin.com/company/entrustedmail/about/ (2 employees on LinkedIn®)






### 20. [FactorX: AI Powered Email Security for Modern Threats](https://www.g2.com/products/factorx-ai-powered-email-security-for-modern-threats/reviews)
FactorX.ai is an AI-powered email security platform that protects enterprises from phishing, BEC, and malware using real-time threat detection, behavioral analysis, and automated incident response to stop advanced threats before damage is done.



**Who Is the Company Behind FactorX: AI Powered Email Security for Modern Threats?**

- **Seller:** [FactorX](https://www.g2.com/sellers/factorx)
- **Year Founded:** 2024
- **HQ Location:** Newark, US
- **LinkedIn® Page:** https://www.linkedin.com/company/factorxai (1 employees on LinkedIn®)






### 21. [formpuppy](https://www.g2.com/products/formpuppy/reviews)
formpuppy is an AI-powered spam filter for contact forms. It uses Claude Haiku to intelligently detect spam and sales emails, so only genuine inquiries reach your inbox.



**Who Is the Company Behind formpuppy?**

- **Seller:** [Pairtok](https://www.g2.com/sellers/pairtok)
- **HQ Location:** N/A
- **LinkedIn® Page:** https://www.linkedin.com/company/No-Linkedin-Presence-Added-Intentionally-By-DataOps (1 employees on LinkedIn®)






### 22. [inumbo](https://www.g2.com/products/inumbo/reviews)
inumbo is a cloud-based anti-spam service that works with any e-mail infrastructure.



**Who Is the Company Behind inumbo?**

- **Seller:** [inumbo](https://www.g2.com/sellers/inumbo)
- **HQ Location:** N/A
- **LinkedIn® Page:** https://www.linkedin.com/company/No-Linkedin-Presence-Added-Intentionally-By-DataOps (1 employees on LinkedIn®)






### 23. [Janusmail](https://www.g2.com/products/janusmail/reviews)
Every day Mailboxes and servers are subjects to phishing, spam, ransomware, viruses and malware attacks. JANUSMAIL is a new concept product, the result of 20 years of experience in the electronic mail management, created for: - Protect emails and servers from attacks and spam - Identify and resolve forwarding/receiving problems - Manage massive amunts of emails without slowdowns - Integrate seamlessly with Zimbra servers - In-depth analysis of incoming and outgoing emails - Include specific features for service providers



**Who Is the Company Behind Janusmail?**

- **Seller:** [B.L.S. Consulting Srl](https://www.g2.com/sellers/b-l-s-consulting-srl)
- **HQ Location:** N/A
- **LinkedIn® Page:** https://www.linkedin.com/company/No-Linkedin-Presence-Added-Intentionally-By-DataOps (1 employees on LinkedIn®)






### 24. [Lexis Nexis Email Risk Assessment](https://www.g2.com/products/lexis-nexis-email-risk-assessment/reviews)
LexisNexis Email Risk Assessment Confirms Emails with Confidence.



**Who Is the Company Behind Lexis Nexis Email Risk Assessment?**

- **Seller:** [LexisNexis](https://www.g2.com/sellers/lexisnexis)
- **Year Founded:** 1970
- **HQ Location:** New York
- **Twitter:** @NexisSolutions (1,258 Twitter followers)
- **LinkedIn® Page:** https://www.linkedin.com/company/lexisnexis/ (9,695 employees on LinkedIn®)






### 25. [Mailhardener](https://www.g2.com/products/mailhardener/reviews)
Mailhardener helps you to secure your domain against being used for email fraud and spam.



**Who Is the Company Behind Mailhardener?**

- **Seller:** [Parsey B.V.](https://www.g2.com/sellers/parsey-b-v)
- **HQ Location:** N/A
- **LinkedIn® Page:** https://www.linkedin.com/company/parseyapp (1 employees on LinkedIn®)







## What Is Email Anti-spam Software?

[Email Security Software](https://www.g2.com/categories/email-security)

## What Software Categories Are Similar to Email Anti-spam Software?

- [Secure Email Gateway Software](https://www.g2.com/categories/secure-email-gateway)
- [Cloud Email Security Solutions](https://www.g2.com/categories/cloud-email-security)
- [Intelligent Email Protection Software](https://www.g2.com/categories/intelligent-email-protection)