Static vs. Dynamic Application Security Testing Tools — Full Comparison For Mobile Applications

Mobile applications operate in complex environments where code, devices, networks, and user interactions constantly introduce new risks. To build resilient mobile apps, development teams need structured testing approaches that identify vulnerabilities before attackers can exploit them. Two of the most important testing methods are Static Application Security Testing (SAST) and Dynamic Application Security Testing (DAST)—each serving a distinct purpose in securing mobile applications.

What Are SAST And DAST Tools?

Static Application Security Testing tools evaluate the source code, bytecode, or binaries of a mobile app without executing it. It is an extremely efficient technique for identifying coding bugs like poorly implemented encryption and insecure data storage logic at very early stages of app development. Static Application Security Testing tools help mobile app developers fortify their apps at the code level and reduce costly fixes later.

On the flip side, mobile app behavior varies dynamically based on various device and Operating System variables. To find vulnerabilities in dynamic situations, Dynamic Application Security Testing tools are highly indispensable. Unlike static testing, dynamic testing on mobile applications implies testing them as they execute, analyzing app inputs, interactions with device components and third-party services, etc. Dynamic Application Security Testing tools help uncover practical issues such as insecure runtime behaviors, weak session handling, vulnerable communication pathways, etc.

SAST vs. DAST Tools Comparison

Criteria	SAST Tools	DAST Tools
Testing Stage	Performed early during app development	Performed on a developed app build
Threat Coverage	Finds flaws like insecure coding, weak validation, and poor encryption use	Finds issues like runtime manipulation, unsafe communication, and environment-based threats
Execution Requirement	Does not require the app to run	Requires app execution for testing
Automation	100% Automation	Automation with Manual Review required to remove false positives
Ideal Use Case	Strengthening app code before final build	Identifying runtime security threats and user device environment-specific risks
Best For	Early-stage app development testing	Pre-release testing and understanding real-world threat exposure

Bugsmirror’s SAST And DAST Tools

Bugsmirror MASST (Mobile Application Security Suite & Tools) offers mobile application testing services and tools for static and dynamic application testing - CodeLock and RunLock.

CodeLock is a SAST tool that finds more than 50 coding security vulnerabilities in mobile applications, like insecure code, weak data encryption, etc. It’s an automated tool that tests your mobile app in less than one hour and helps you protect apps before releasing them.

RunLock is a DAST tool that detects more than 25 runtime security threats like app spoofing, unsecured Wi-Fi, etc. It combines automated testing with manual expert analysis to ensure fast and accurate assessment of apps within 24 hours.

With CodeLock and RunLock, you can quickly find security vulnerabilities and implement necessary security measures to mitigate those vulnerabilities efficiently and confidently.