About PreEmptive

The Leading Application Security That Developers Trust

PreEmptive has been the industry-leading app shielding and hardening solution for over 25 years—helping developers and teams secure source code from the very start of development.

PreEmptive hits the sweet spot between cost, convenience, and functionality by helping you protect and secure your apps efficiently.

Our multi-layered application protection safeguards your source code directly within .NET, MAUI, Java, Android, and JavaScript applications—this means there’s no need for an agent or modifications to your end user’s device or network. PreEmptive helps you manage application risks and comply with regulations, protecting sensitive data across high-risk industries.

PreEmptive has helped secure thousands of clients’ applications

PreEmptive is a trusted global leader of protection tools for Desktop, Mobile, Cloud, and Internet of Things (IoT) applications, helping organizations make their applications more resistant and resilient to hacking and reverse engineering.

5,693

Corporate Clients

300,284

Users

101

Countries

PreEmptive's Clients include hundreds of the Fortune 500

From startups to enterprises, businesses trust PreEmptive’s application security solutions to prevent data exposure and hacking attempts. Explore real-world case studies to see how our technology enhances security and compliance.

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Application protection across modern development platforms

PreEmptive helps teams protect applications across .NET, MAUI, Java, Android, and JavaScript environments through layered obfuscation

Dotfuscator For

.NET MAUI

Code obfuscation and application hardening

DashO For

Android & Java

App shielding, obfuscation, and runtime protection

JSDefender For

JavaScript

JavaScript obfuscation and browser-based application protection

PreEmptive Protection embedded into Visual Studio

Our technologies have been embedded into Visual Studio since 2003 and are subject to Microsoft’s regression tests, code audits and security reviews. As a result, PreEmptive is the only 3rd party technology to have this level of integration and validation, giving developers a peace of mind throughout the SDLC.

PreEmptive is part of the Sembi family of B2B Software Tools

PreEmptive, founded in 1996, provides trusted application protection tools that help developers defend against reverse engineering, tampering, and data theft. Acquired by Idera, Inc. in 2021, PreEmptive is now part of Sembi—providing trusted AI-enhanced solutions to enhance quality, strengthen security, and accelerate product delivery. Sembi enables teams to build with confidence.

Learn more about Sembi

Interested in becoming part of the PreEmptive Team?

We create cutting-edge software products that are used by app development teams to protect the value of their innovation through a combination of binary obfuscation and automated detection, defense, and alert controls. Keeping up with ever-evolving technology requires the best team at hand!

View all open opportunities