Allatori vs Stringer Java Obfuscator

Allatori is a Java obfuscator that works on compiled class files to protect intellectual property and make reverse engineering more difficult. It does not require original Java source code. Its features include name, control-flow and debug-information obfuscation, string encryption, watermarking and incremental obfuscation, along with a utility for stack traces and a module intended to disrupt decompilers. It supports J2EE, J2SE, J2ME and Android targets. Build options include a command-line interface, Apache Ant, Maven, Android Studio and an Eclipse plugin. Written in Java, it can technically run wherever a Java 1.4-or-later virtual machine is supported; the maker says it has been tested on Windows, Mac OS X and UNIX. The maker reports typical application size reductions of about 10–40%, sometimes up to 60% with many third-party libraries. String encryption can add 1–2% to bytecode size, while flow obfuscation can slightly increase size and rarely reduce performance. Native methods and their containing classes are not renamed automatically. A single developer license costs $290 as a one-time purchase; the free plan is also listed.

Stringer Java Obfuscator protects Java application binaries against reverse engineering and modification. It can encrypt strings and application resources, including native libraries, and conceal method calls, field types, and field access. Integrity features include certificate and JAR content checks, JAR sealing, runtime checks, and tamper notifications. The manual also lists anti-emulator and Java code anti-debugging protections, resource-name obfuscation, SSL pinning, watermarking, and a secure code execution environment. Stringer runs offline in an environment controlled by the customer and is available for Linux, macOS, and Windows. Teams can use the command line and integrate it with Ant, Maven, Gradle, or Eclipse. Listed targets include Java SE, Jakarta EE, Java ME, JavaFX, Java Embedded, Eclipse RCP, and NetBeans RCP. The GUI does not expose every feature, and some features and project-input support are Enterprise-only or priced separately. Stringer runs under JRE 1.7 or later and can process applications compiled for J2SE 5.0 and later. Pricing is on request; a 15-day trial is offered.