# Best Secure Email Gateway Software for Small Business - Page 2

## How Many Secure Email Gateway Software Products Does G2 Track?

**Total Products under this Category:** 65

### Category Stats (Jul 2026)

- **Average Rating:** 4.44/5 The average rating of products in this category, based on all submitted ratings
- **Top Trending Product:** Sophos Email (+0.54%) - Among all products in this category, Sophos Email recorded the largest rating increase compared to last month

_Last updated: July 28, 2026_

## How Does G2 Rank Secure Email Gateway Software Products?

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

- 30 Analysts and Data Experts
- 3,400+ Authentic Reviews
- 65+ 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.

## G2 Grid® for Secure Email Gateway Software
 ![G2 Grid® for Secure Email Gateway Software plotting products by satisfaction and market presence](https://www.g2.com/categories/secure-email-gateway/grids.png?focus%5B%5D=25519&focus%5B%5D=10847&focus%5B%5D=67720&focus%5B%5D=75596&focus%5B%5D=81906&focus%5B%5D=129100&focus%5B%5D=3675&focus%5B%5D=30562)

Highlighted products: Paubox, Sophos Email, Microsoft Exchange, Cloudflare One (SASE), LuxSci, Libraesva Email Security, Virtru Email Encryption, and Proofpoint Core Email Protection.

Underlying data: [Grid® JSON](https://www.g2.com/categories/secure-email-gateway/grids.json?focus%5B%5D=paubox&focus%5B%5D=sophos-email&focus%5B%5D=microsoft-microsoft-exchange&focus%5B%5D=cloudflare-one-sase&focus%5B%5D=luxsci&focus%5B%5D=libraesva-email-security&focus%5B%5D=virtru-email-encryption&focus%5B%5D=proofpoint-core-email-protection&segment=small-business)

**Sponsored**

### Proofpoint Core Email Protection

Proofpoint Collaboration Security tackles multichannel, multistage attacks with 99.999% detection accuracy. It identifies and remediates advanced email threats including BEC, ransomware, phishing, ATO, and exec impersonations. The solution blocks threats across email and other digital communication and collaboration platforms, i.e. MS Teams, WhatsApp, Slack, LinkedIn, OneDrive, protecting users anywhere they work, on any device. Customers get protection against both internal and supplier account compromise, and strengthens human resilience against emerging threats. With Proofpoint’s Collaboration Security, customers ensure that interactions with business partners, suppliers, and even AI agents remain trusted and secure.

[Visit website](https://www.g2.com/external_clickthroughs/record?secure%5Bad_program%5D=paid_promo&secure%5Bad_slot%5D=category_product_list&secure%5Bcategory_id%5D=1086&secure%5Bchosen_at%5D=2026-07-29T11%3A34%3A59Z&secure%5Bmedium%5D=sponsored&secure%5Bprioritized%5D=false&secure%5Bproduct_id%5D=30562&secure%5Bresource_id%5D=1086&secure%5Bresource_type%5D=Category&secure%5Bsource_type%5D=category_page&secure%5Bsource_url%5D=https%3A%2F%2Fwww.g2.com%2Fcategories%2Fsecure-email-gateway%2Fsmall-business%3Fpage%3D2&secure%5Btoken%5D=770631c7d4026b286775be33f1f048b1085a26470083aeeacb760993fc84fa73&secure%5Burl%5D=https%3A%2F%2Fwww.proofpoint.com%2Fus%2Fproducts%2Femail-protection&secure%5Burl_type%5D=paid_promos)

### [Phish Protection by DuoCircle](https://www.g2.com/products/phish-protection-by-duocircle/reviews)

Phish Protection Email Security with Advanced Threat Protection, is a cloud-based email protection suite for your businesses - that stops phishing attacks, malware, ransomware, viruses via email, malicious links, fraud, spam, spoofing and other malicious threats over email - all in real-time, and without the need to install any expensive tools or software.

**Average Rating:** 4.7/5.0

**Total Reviews:** 43

#### How Do G2 Users Rate Phish Protection by DuoCircle?

- **Advanced Threat Intelligence/Protection:** 8.3/10 (Category avg: 8.9/10)
- **Filtering Functionality:** 9.0/10 (Category avg: 8.9/10)
- **Has the product been a good partner in doing business?:** 9.7/10 (Category avg: 8.8/10)
- **Quarantine:** 8.3/10 (Category avg: 8.9/10)

#### Who Is the Company Behind Phish Protection by DuoCircle?

- **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:** [www.linkedin.com](https://www.g2.com/external_clickthroughs/record?secure%5Bsource_type%5D=product_profile&secure%5Btoken%5D=8e4605f46895e23ff11f77078613f0250d987ad76b735a02760a3296aef1a1c6&secure%5Burl%5D=https%3A%2F%2Fwww.linkedin.com%2Fcompany%2Fduocircle%2Fabout&secure%5Burl_type%5D=linkedin_company_website)  
13 employees on LinkedIn®

#### Who Uses This Product?

- **Top Industries:** Computer & Network Security, Information Technology and Services
- **Company Size:** 63% Small, 33% Medium

#### What Are Recent G2 Reviews of Phish Protection by DuoCircle?

**["Excellent and easy to implement / easy to use solution"](https://www.g2.com/survey_responses/phish-protection-by-duocircle-review-7296860)**

**Rating:** 5.0/5.0 stars

_— Verified User in Arts and Crafts_

[Read full review](https://www.g2.com/survey_responses/phish-protection-by-duocircle-review-7296860)

**["Flawless and transparent user experience"](https://www.g2.com/survey_responses/phish-protection-by-duocircle-review-4208920)**

**Rating:** 5.0/5.0 stars

_— Hasso R._

[Read full review](https://www.g2.com/survey_responses/phish-protection-by-duocircle-review-4208920)

#### What Are G2 Users Discussing About Phish Protection by DuoCircle?

- [Which software is used for phishing attack?](https://www.g2.com/discussions/which-software-is-used-for-phishing-attack)
- [What does phishing software do?](https://www.g2.com/discussions/what-does-phishing-software-do)
- [What is phishing protection?](https://www.g2.com/discussions/what-is-phishing-protection)
- [What are 5 features of phishing?](https://www.g2.com/discussions/what-are-5-features-of-phishing)

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Similar Categories

- [Cloud Email Security](/categories/cloud-email-security)
- [Email Anti-spam](/categories/email-anti-spam)

- [Email Encryption](/categories/email-encryption)
- [Intelligent Email Protection](/categories/intelligent-email-protection)

[Browse Secure Email Gateway Themes](/categories/secure-email-gateway/themes)

 ![Lauren Worth](/assets/transparent-ad5be28fbcd25b7b08d2cebe1d957125437fb5407d75ee717965ad22c8808791.gif "Lauren Worth")
LW

Researched and written by [Lauren Worth](https://research.g2.com/insights/author/lauren-worth)

Updated 

Products classified in the overall Secure Email Gateway category are similar in many regards and help companies of all sizes solve their business problems. However, small business features, pricing, setup, and installation differ from businesses of other sizes, which is why we match buyers to the right Small Business Secure Email Gateway to fit their needs. Compare product ratings based on reviews from enterprise users or connect with one of G2's buying advisors to find the right solutions within the Small Business Secure Email Gateway category.

In addition to qualifying for inclusion in the Secure Email Gateway Software category, to qualify for inclusion in the Small Business Secure Email Gateway Software category, a product must have at least 10 reviews left by a reviewer from a small business.

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