--- title: PreEmptive Reviews meta_title: 'PreEmptive Reviews 2026: Details, Pricing, & Features | G2' meta_description: Filter 50 reviews by the users' company size, role or industry to find out how PreEmptive works for a business like yours. aggregate_rating: rating_value: 4.6 review_count: 50 scale: '5' date_modified: '2026-11-11' parent_category: name: Application Security url: https://www.g2.com/categories/application-security ---

PreEmptive Reviews & Product Details

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PreEmptive Reviews (50)

Reviews

PreEmptive Reviews (50)

4.6
50 reviews

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Kodam  S.
KS
Kodam S.
Operations Support Assistant
Enterprise (> 1000 emp.)
Business partner of the seller or seller's competitor, not included in G2 scores.
"Simple, Practical JavaScript Protection That Fits Seamlessly Into My Workflow"
4.5/5
What do you like best about PreEmptive?

What I like most about JSDefender – App Protection for JavaScript is that it secures my code in a simple, practical way without making a developer’s work feel complicated.

In my experience, JavaScript code is easy to view in the browser, which can be risky. JSDefender addresses this by converting the code into a protected, harder-to-understand format, making it much more difficult for others to copy or misuse. That gives me more confidence when I’m working on important applications.

I also appreciate how easy it is to integrate. It fits into my existing workflow without requiring major changes, which is especially convenient during development. Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

One thing I don’t really like about JSDefender App Protection for JavaScript is that, once the code is obfuscated, it becomes very hard to read—even for developers. When debugging is needed or I have to make a quick update, it ends up taking extra time and effort to work through the obfuscated code. Review collected by and hosted on G2.com.

Verified User in Military
UM
Verified User in Military
Small-Business (50 or fewer emp.)
"Outstanding Support and Effortless Usability"
5/5
What do you like best about PreEmptive?

The customer support, configurability, ease of use, capabilities. Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

The added build time when obfuscating. This is not an issue with PreEmptive itself but rather a concequence of using additional tools during development. We get around this by using PreEmptive at the end of the development cycle. Review collected by and hosted on G2.com.

Loïc C.
LC
Loïc C.
Founder
Small-Business (50 or fewer emp.)
"A strong leader in its category"
5/5
What do you like best about PreEmptive?

I’ve been using Dotfuscator for over 20 years in critical third-party software development, and I’ve always considered it the category king. Our team has integrated it into various build pipelines, from local environments to CI systems, across different operating systems. Dotfuscator has consistently worked flawlessly in every situation. The engineering team continues to deliver innovation with a strong focus on security, making this product an indispensable component of professional-grade software delivery. Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

The documentation for advanced configuration could be more comprehensive, as it does not fully reflect the product’s potential. Review collected by and hosted on G2.com.

Verified User in Computer Software
CC
Verified User in Computer Software
Small-Business (50 or fewer emp.)
"The sales team was friendly and easy to work with."
4/5
What do you like best about PreEmptive?

Diotfuscator is great for protecting your IP. Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

No issues so far. We have been using the product for years and just renewed. Review collected by and hosted on G2.com.

Munkh E.
ME
Munkh E.
DevOps Engineering Team Lead
Mid-Market (51-1000 emp.)
"Easy to set up, and the support team is super responsive"
4/5
What do you like best about PreEmptive?

We were able to implement Dotfuscator for our .NET applications and it was easy setup and all required documents where available for us. Also the support from PreEmptive was super fast and responsive. The integration was smooth for our .NET applications and we use it frequently in our pipeline by automated manner. Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

We did not see any downside of Dotfuscator for our apps. Review collected by and hosted on G2.com.

Bikash P.
BP
Bikash P.
Penetration Tester/InfoSec Consultant
Small-Business (50 or fewer emp.)
"PreEmptive Protection"
4/5
What do you like best about PreEmptive?

PreEmptive Protection helps and provides protection from being spammed or from being ripped Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

UI of PreEmptive Protection is that they have to work on it. It's not easy to find something sometimes Review collected by and hosted on G2.com.

Verified User in Biotechnology
UB
Verified User in Biotechnology
Mid-Market (51-1000 emp.)
"Good Product"
5/5
What do you like best about PreEmptive?

Dotfuscator does exactly what it claims to do. The Customer Support is excellent and answered all my questions. Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

Dotfuscator was easy to use and set up; however, I thought the Online user's guide was somewhat rudimentary. It could use some more detail. Review collected by and hosted on G2.com.

Verified User in Computer Software
CC
Verified User in Computer Software
Small-Business (50 or fewer emp.)
"Needed better understanding of Dotfuscator license options"
5/5
What do you like best about PreEmptive?

Absolutely needed for deployment of applications in which there is sensitive IP. Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

No notable downsides - critical tool when algorithm protection is needed. Review collected by and hosted on G2.com.

Usmangani P.
UP
Usmangani P.
Sr. Project Manager
Information Technology and Services
Mid-Market (51-1000 emp.)
"Highly recommend for JavaScript code security"
5/5
What do you like best about PreEmptive?

Does an excellent job in securing your javascript source code. As the javascript code is open and vulnerable to security breaches. This tool does a tremendous job of securing your Javascript code. I Applied JSDefender to my Nodejs coding structure and does the perfect job of securing my code. Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

- If you have used the eval() function in your code, then this tool JSDefender fails the protection. So try to avoid the eval() function in your javascript code if wanted to use this tool.

- Pricing is a little bit high, but if you are OK with that, then it's good to go. Review collected by and hosted on G2.com.

IS
Irina S.
Global Marketing Manager
Electrical/Electronic Manufacturing
Enterprise (> 1000 emp.)
"Powerful protection system"
5/5
What do you like best about PreEmptive?

JSDefender Security's malware and other threat prevention capabilities and ease of installation and configuration were appealing. Password management, ransomware protection, two-factor authentication, and mobile protection are also available. Companies also need proactive threat prevention from the software. This lightweight SW doesn't affect device performance, even vintage ones. simple to setup and accurate malware detection. Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

Sometimes tasks fail for no obvious reason, and the only way to fix it is to run the task by hand. This can take a lot of time. JSDefender doesn't always take care of bugs, so you need to use a tool to remove the corrupt files. Review collected by and hosted on G2.com.

Questions about PreEmptive? Ask real users or explore answers from the community

Get practical answers, real workflows, and honest pros and cons from the G2 community or share your insights.

GU
Guest User
•
Last activity about 3 years ago

What is JSDefender – App Protection for JavaScript used for?

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GU
Guest User

What is Dotfuscator – App Protection for .NET & Xamarin used for?

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