--- 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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Perceived Cost

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PreEmptive Reviews (50)

Reviews

PreEmptive Reviews (50)

4.6
50 reviews

What do users say?

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SB
Spencer B.
Small-Business (50 or fewer emp.)
"Quick and Simple JS Obfuscation"
5/5
What do you like best about PreEmptive?

JSDefender is able to be quickly integrated into existing build processes without any hassle. The documentation is clear, and the product has a variety of configuration options. The overall experience was pleasant and the tool actually does what it says it will do. The performance impact is negligible which is also very important in our use case. Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

There is not much negative to say, this fit our needs exactly. Review collected by and hosted on G2.com.

Verified User in Construction
EC
Verified User in Construction
Small-Business (50 or fewer emp.)
"Great product; great service"
5/5
What do you like best about PreEmptive?

Normally it's difficult to trust promises made by a sales representative. They usually promise great service, great product, great features, and tons of value. To my surprise, it was all true with Dotfucator. I could not be happier with the product and the excellent support team. Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

The price is higher than I would like to pay, but I can see the value for high quality product and service. Review collected by and hosted on G2.com.

Verified User in Medical Devices
AM
Verified User in Medical Devices
Enterprise (> 1000 emp.)
"Able to tackle our increasing security demands, without any sweat"
5/5
What do you like best about PreEmptive?

Fine tuning of which assemblies to group together as friend assemblies - Easier for our internal testing. The mac build agent is a HUGE plus! Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

Missing GUI configurator on Mac. We are running all CI/CD on mac hardware, and also developing our CI/CD pipelines on Mac. Review collected by and hosted on G2.com.

Verified User in Computer Software
EC
Verified User in Computer Software
Mid-Market (51-1000 emp.)
"Very good balance between capabilities and pricing"
5/5
What do you like best about PreEmptive?

The tool is quite complete and has most of the features you would expect in an obfuscator solution: renaming, control flow obfuscation, string encryption, and the likes. It has anti tampering protections as well which I have not tested.

Pricing was great before licensing changes and continues to be very good after. Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

It is somehow complex to get to understand every little feature and configuration switch and you get the feeling you are not getting the best possible protection it is capable of, out of your own lack of knowledge.

It should evolve to have an easier UI, better wizards and more online training material (videos, how-tos, etc.) in order to ease the learning curve. Review collected by and hosted on G2.com.

Verified User in Information Technology and Services
II
Verified User in Information Technology and Services
Mid-Market (51-1000 emp.)
"Solid protection to Android app with good price"
5/5
What do you like best about PreEmptive?

* Good enough protection to Android app

* Easy to integrate with build pipeline on cloud

* Don't need to sign a long term

* Affordable price Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

* Lack of utilities to facilitate the investigation.

* After installation on Mac, Dash-O can't automatically locate the JDK. Have to manually update the dashorc file to provide JDK path with DASHO_JAVA_HOME env variable. Review collected by and hosted on G2.com.

Rihan P.
RP
Rihan P.
Android Developer
Computer Software
Mid-Market (51-1000 emp.)
Originally submitted 10/18/2019
"Obfuscator for Java and Android: Best security plugin to protect my source code"
4.5/5
What do you like best about PreEmptive?

Java obfuscator and android obfuscator works best for me to provide security to my android application source code from unauthorised decompilation and extraction of code, malicious cyber attacks as well as cracking of functions of the application. Other than that, it provides optimization and refactoring of my code by removing unwanted code such as unused methods, functions, variables etc. Also, it is very easy to integrate the obfuscator tool to my android application code. Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

Obfuscator for Java and obfuscator for Android is a cost. The functionalities they provide are definitely worth to charge that price; however, I believe that it can be made more user acceptance. Review collected by and hosted on G2.com.

Verified User in Telecommunications
IT
Verified User in Telecommunications
Enterprise (> 1000 emp.)
"Reliable source code obfuscation"
3.5/5
What do you like best about PreEmptive?

Easy and user friendly. Does what it promises and integrates well. Obfuscation/encryption are more than just jumbling names. Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

The licensing structure was a bit hard to understand at first. Review collected by and hosted on G2.com.

Verified User in Hospital & Health Care
UH
Verified User in Hospital & Health Care
Small-Business (50 or fewer emp.)
"DashO Review"
4/5
What do you like best about PreEmptive?

That we have a tool that allows us to obfuscate our app in order to protect our IP Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

It can be a bit cumbersome to get setup, though the interface makes it easy get through things Review collected by and hosted on G2.com.

Verified User in Computer Games
UC
Verified User in Computer Games
Mid-Market (51-1000 emp.)
"Very good obfuscation quality, very good support"
4/5
What do you like best about PreEmptive?

Control flow obfuscation is really good, really scramble the code and works out of the box. Command line tool easy to use. Obfuscation attributes easy to work with. Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

Really slow to obfuscate, but it's the case for all obfuscator I tried. Cannot include only 1 namespace to obfuscate, only possible to exclude (or didn't find how). Review collected by and hosted on G2.com.

Verified User in Oil & Energy
UO
Verified User in Oil & Energy
Small-Business (50 or fewer emp.)
"Great option for professional software deployment!"
5/5
What do you like best about PreEmptive?

I like the flexibility the tool offers. I can tailor my usage to suit several very different projects, internal and externally visible. Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

The UI is quite slow, so one needs to become proficient with the XML configuration. 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?

0 Upvotes
1
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GU
Guest User

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

0 Upvotes
0
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