Probely (Snyk API & Web) vs Secure Decisions ASTAM: Side-by-Side Comparison (2026)

Probely (Snyk API & Web): DAST scanner for discovering and testing APIs and web apps for vulns. built by Probely. Core capabilities include Asset discovery and inventory management for APIs and web apps, API vulnerability scanning supporting OpenAPI (Swagger) and Postman Collections, Headless Chrome-based spider for JavaScript and SPA crawling..

Secure Decisions ASTAM: DHS-funded program providing automated AppSec tools across the SDLC. built by Secure Decisions. Core capabilities include Automated enumeration of hidden and unlinked web application endpoints via static analysis (ASD), Detection of optional parameters and data types for discovered endpoints, Attack surface difference generation to highlight changes between application versions..

Both serve the Dynamic Application Security Testing market but differ in approach, feature depth, and target audience.

Probely (Snyk API & Web) differentiates with Asset discovery and inventory management for APIs and web apps, API vulnerability scanning supporting OpenAPI (Swagger) and Postman Collections, Headless Chrome-based spider for JavaScript and SPA crawling. Secure Decisions ASTAM differentiates with Automated enumeration of hidden and unlinked web application endpoints via static analysis (ASD), Detection of optional parameters and data types for discovered endpoints, Attack surface difference generation to highlight changes between application versions.

Probely (Snyk API & Web) is developed by Probely. Secure Decisions ASTAM is developed by Secure Decisions. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.

Probely (Snyk API & Web) integrates with OpenAPI (Swagger), Postman Collections. Secure Decisions ASTAM integrates with Burp Suite, OWASP ZAP (Zed Attack Proxy). Check integration compatibility with your existing security stack before deciding.

Probely (Snyk API & Web) and Secure Decisions ASTAM serve similar Dynamic Application Security Testing use cases: both are Dynamic Application Security Testing tools, both cover DAST, OWASP, DEVSECOPS. Key differences: Probely (Snyk API & Web) is Commercial while Secure Decisions ASTAM is Free. Review the feature comparison above to determine which fits your requirements.