No more typing reviews! Try our Samantha, our new voice AI agent.

Fortra's Clearswift Secure Email Gateway vs Tessian Guardian comparison

Why PeerSpot?
 

Comparison Buyer's Guide

Executive Summary

Review summaries and opinions

We asked business professionals to review the solutions they use. Here are some excerpts of what they said:
 

Categories and Ranking

Fortra's Clearswift Secure ...
Ranking in Email Security
31st
Average Rating
8.6
Reviews Sentiment
7.1
Number of Reviews
0
Ranking in other categories
No ranking in other categories
Tessian Guardian
Ranking in Email Security
63rd
Average Rating
0.0
Number of Reviews
0
Ranking in other categories
Data Loss Prevention (DLP) (59th)
 

Mindshare comparison

As of November 2026, in the Email Security category, the mindshare of Fortra's Clearswift Secure Email Gateway is 1.4%, up from 1.0% compared to the previous year. The mindshare of Tessian Guardian is 0.4%, up from 0.2% compared to the previous year. It is calculated based on PeerSpot user engagement data.
Email Security Mindshare Distribution
ProductMindshare (%)
Fortra's Clearswift Secure Email Gateway1.4%
Tessian Guardian0.4%
Other98.2%
Email Security
 

Featured Reviews

PC
Systems Administrator at a financial services firm with 1,001-5,000 employees
Stable, but malware needs improvement and customer support is poor
They need to improve the malware in the product. I am not satisfied with Clearswift because of the lack of customer support. The support is poor, the supplier takes a lot of time and it's expensive. We have some issues here when I contact the supplier, it takes a lot of time for them to get back to us but there's no solution. I am now looking at Symantec as a possible alternative.
Use Tessian Guardian?
Leave a review
report
Use our free recommendation engine to learn which Email Security solutions are best for your needs.
921,749 professionals have used our research since 2012.
 

Top Industries

By visitors reading reviews
Construction Company
12%
Retailer
11%
Financial Services Firm
11%
Comms Service Provider
8%
Construction Company
20%
Financial Services Firm
12%
Comms Service Provider
12%
Healthcare Company
12%
 

Company Size

By reviewers
Large Enterprise
Midsize Enterprise
Small Business
No data available
No data available
 

Overview

 

Sample Customers

Information Not Available
Affirm, Choate, BMA, Evercore, Gubra, Accel, Fieldfisher, Clearwater, Man Group plc, Graphcore, Investec, Rightmove
Find out what your peers are saying about Proofpoint, Microsoft, Check Point Software Technologies and others in Email Security. Updated: October 2026.
921,749 professionals have used our research since 2012.