--- 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?

Generated using AI from real user reviews
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Satyaprakash S.
SS
Satyaprakash S.
Antivirus Admin
Mid-Market (51-1000 emp.)
"Best JavaScript In-App Protection"
5/5
What do you like best about PreEmptive?

The on-premise obfuscation solution offered by the range of configuration choices was highly flexible and the integration process was simple. The outcome is a tool that precisely meets the needs of developers in our position and is easy to use and customizable. Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

So yet, we haven't discovered any significant drawbacks to this product. Review collected by and hosted on G2.com.

MS
Matheus S.
Owner
Leisure, Travel & Tourism
Small-Business (50 or fewer emp.)
"Security features and simple integration"
5/5
What do you like best about PreEmptive?

Dotfuscator provides a range of options and settings to protect our apps Its advantage is how it saves time in ensuring the security of our product. Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

It difficult to evaluate the effectiveness of its protection. Additionally the lack of documentation is difficult when trying to utilize all the features and customize security levels. Review collected by and hosted on G2.com.

Vipul p.
VP
Vipul p.
Software Engineer
Enterprise (> 1000 emp.)
"Most Recommended Javascript protection system"
4.5/5
What do you like best about PreEmptive?

Best features of JSDefender which makes it one of the best js code protection system:

- Easy to use and Lightweight as there is no affect to device performance.

- Proactive security for Software.

- Ransomware Protection.

- Provide quick and easy integration to existing build. Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

No negative feature experienced, met our needs successfully. Review collected by and hosted on G2.com.

Kanakam G.
KG
Kanakam G.
Quality Engineer
Mid-Market (51-1000 emp.)
"JSDefender and app protection"
5/5
What do you like best about PreEmptive?

Jsdefender finds vulnerabilities in code when we perform SAST. Gives accurate threat report and almost less false positives Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

Nothing as of now, JSDefender is moving towards right direction. Review collected by and hosted on G2.com.

Usman S.
US
Usman S.
Software Tester
Mid-Market (51-1000 emp.)
"JS Defender"
5/5
What do you like best about PreEmptive?

It is very useful for protection of our JS code. It helps us to make our data more secure from theft. Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

As of now I don't see anything to dislike. Review collected by and hosted on G2.com.

Verified User in Computer & Network Security
UC
Verified User in Computer & Network Security
Mid-Market (51-1000 emp.)
Originally submitted 10/11/2023
"Best security solution for script based attacks and exploits"
5/5
What do you like best about PreEmptive?

They are likely the single solution provider for Javascript on the whole, which prevents scripts from getting used malicious in attacks and exploits Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

JSDefender provides a unique solution but whereas there are still holes that has to be filled and improvements that to be made as the attackers evolve and threat landscape evolve they are using new techniques for exploiting js Review collected by and hosted on G2.com.

BT
Brian T.
Small-Business (50 or fewer emp.)
"Dotfuscator quick and painless obfuscation"
4/5
What do you like best about PreEmptive?

It was quick and painless when setting up our projects to obfuscate. Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

Nothing, we had not problems when trying to setup our project. Review collected by and hosted on G2.com.

MALLESWARA RAO  V.
MV
MALLESWARA RAO V.
Systems Engineer
Enterprise (> 1000 emp.)
"JS defender review"
4.5/5
What do you like best about PreEmptive?

--> Tamper detection

-->obfuscation techniques

--> Control flow flattering

-->dedicated support Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

limited functionality

complexity to setup Review collected by and hosted on G2.com.

Ronak A.
RA
Ronak A.
Associate Consultant
Small-Business (50 or fewer emp.)
"Make JS code protected"
4.5/5
What do you like best about PreEmptive?

This is very helpful, makes code projected and hence, provides better security. Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

Encoded techniques requires proper study to know where and how to apply. Review collected by and hosted on G2.com.

Verified User in Computer Software
UC
Verified User in Computer Software
Small-Business (50 or fewer emp.)
"Best Recommended Javascript Protection System"
5/5
What do you like best about PreEmptive?

Best features of JSDefender which makes it one of the best js code protection system:

-Data more secure from Theft

- Gives Better security for Software applications.

- Gives best Ransomware Protection. Review collected by and hosted on G2.com.

What do you dislike about PreEmptive?

As of now I don't see any dislike, ALL Features are great 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
Join the conversation
GU
Guest User

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

0 Upvotes
0
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