# PreEmptive

PreEmptive is a cybersecurity company based in the United States, founded in 1996. It has 3 products listed on CybersecTools.

> App shielding & hardening for .NET, Java, and Android applications

Source: https://cybersectools.com/companies/preemptive · Updated February 2026

## Quick facts

- Category: [Application Security](https://cybersectools.com/categories/application-security)
- Type: Product vendor
- Headquarters: United States
- Founded: 1996
- Products listed: 3
- Website: [preemptive.com](https://preemptive.com/)

## What does PreEmptive do?

PreEmptive provides application protection and hardening solutions for .NET, MAUI, Java, and Android applications. The company's technology focuses on protecting applications from reverse engineering, tampering, and data theft through obfuscation, encryption, root detection, shielding, and tamper-proofing techniques. Their solutions are embedded directly into applications without requiring agents or changes to end-user devices or networks.

Founded in 1996, PreEmptive has been integrated into Visual Studio since 2003 and is subject to Microsoft's regression tests, code audits, and security reviews. The company serves over 5,000 corporate clients and 20,000 users worldwide across desktop, mobile, cloud, and IoT platforms. Their client base includes financial institutions, healthcare organizations, government agencies, telecommunications companies, and technology firms.

PreEmptive's protection approach uses multiple layers including rename obfuscation, control flow obfuscation, pattern transformation, and dummy code insertions to make code difficult to interpret and reverse engineer. The solutions help organizations protect intellectual property, prevent revenue loss, maintain compliance with regulations, and defend against fraud and unauthorized access. PreEmptive was acquired by Idera, Inc. in 2021 and is now part of Sembi, a portfolio of testing and security software brands.

Categories: [Application Security](https://cybersectools.com/categories/application-security), [Data Protection](https://cybersectools.com/categories/data-protection), [Threat Intelligence](https://cybersectools.com/categories/threat-intelligence)

## PreEmptive products

- [PreEmptive JSDefender](https://cybersectools.com/tools/preemptive-jsdefender): JavaScript obfuscation tool for protecting code from reverse engineering (commercial)
- [PreEmptive Dotfuscator](https://cybersectools.com/tools/preemptive-dotfuscator): C# obfuscation & encryption tool for .NET, MAUI, and Xamarin apps (commercial)
- [PreEmptive DashO](https://cybersectools.com/tools/preemptive-dasho): Java, Android, and Kotlin app obfuscation and hardening tool (commercial)

---

More on PreEmptive: funding, momentum, hiring and news, plus the full product and company record, are available through the Mandos MCP Server (paid plans), which connects to AI assistants: https://mandos.io/mcp?utm_source=cybersectools.com&utm_medium=company-md