Harden your apps against AI-assisted attacks
Protect .NET, Java, JavaScript and Android applications as part of a layered defense strategy — make your code a hard target. You know the code, we know security.
String apiKey =
“sk_live_8f2a…”;
double calculateFee(
double amount) {
return amount * 0.029;
}
}
byte[] b3K =
c9z.decode(…);
double m1(
double p0) {
return q4f.x(p0,k2);
}
}
Trusted by 5,000+ companies worldwide
Why PreEmptive
AI makes attacks cheap and fast. PreEmptive protects you.
PreEmptive builds directly into your build process, raising the time, cost and effort required for reverse engineering to the point where an attempt is no longer worthwhile for an attacker. No code changes, no runtime performance impact — just applications that leave attackers no way in.
As part of a layered security strategy, PreEmptive protects sensitive algorithms, business logic and source code before attackers can exploit them — through code obfuscation, tamper detection (anti-tamper) and runtime protection (RASP).
Stop reverse engineering
Protect sensitive algorithms, business logic and code before attackers can exploit them.
Harden your source code
Shrink the attack surface and block automated and AI-assisted analysis of your code.
Protect every build
Build protection directly into your pipeline for automatic security and compliance with every release.
Find the right protection for your platform
Three products, complete platform coverage
Dotfuscator
Protect your .NET MAUI, .NET and ASP.NET Core applications with layered obfuscation and runtime protections against reverse engineering and tampering.
DashO
Harden Android and Java applications with obfuscation, anti-tamper protection and RASP (runtime application self-protection) for comprehensive mobile app protection.
JSDefender
Protect client-side JavaScript with obfuscation, anti-tamper controls and code integrity checks for web and hybrid applications.
Trusted by developers
What our customers say
5,000+
Companies
“It’s very easy to work with and doesn’t add any overhead or issues to our usual release flow … It’s very unobtrusive.”
Alon GeriCo-Founder & Chief Software Engineer, Surgical Theatre
300K+
Developers
“Simple to set up, and the support team is extremely fast to respond. We were able to implement Dotfuscator for our .NET applications and it was easy to set up.”
DevOps EngineeringTeam Lead
20+ yrs
In the industry
“Dotfuscator is the perfect way to protect your intellectual property that can’t be hidden behind a thin client.”
Bart WolczykSenior Technology Engineer, DME Forensics
Part of the Sembi DevOps tool ecosystem
Protect your applications, preemptively
Secure every build against reverse engineering, tampering and AI-assisted attacks. Reduce compliance risk and protect your intellectual property.