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Secure Decisions ASTAM is a free dynamic application security testing tool by Secure Decisions. Probely (Snyk API & Web) is a commercial dynamic application security testing tool by Probely. Compare features, ratings, integrations, and community reviews side by side to find the best dynamic application security testing fit for your security stack.
Based on our analysis of NIST CSF 2.0 coverage, core features, integrations, company size fit, here is our conclusion:
Development teams that want attack surface visibility without vendor lock-in should start with Secure Decisions ASTAM, a government-funded toolset that maps hidden endpoints and optional parameters across your entire application stack at no cost. The DHS backing and native integrations with Burp Suite and OWASP ZAP mean you're not subsidizing a vendor's R&D; you're getting legitimate AppSec infrastructure. Skip this if your org needs a single commercial vendor to call for support and SLAs, or if you're already committed to a monolithic DAST platform with proprietary workflows.
Mid-market and enterprise teams building APIs or JavaScript-heavy web apps need Probely (Snyk API & Web) because it actually discovers what you're running before it scans it, eliminating the guesswork that kills DAST programs. The headless Chrome spider handles modern SPAs and the native API scanning accepts OpenAPI and Postman Collections directly from your existing tooling, cutting weeks off typical deployments. Skip this if your primary concern is SAST or supply chain risk; Probely owns the runtime security layer (NIST ID.RA and PR.PS) but doesn't pretend to be your code scanner.
DHS-funded program providing automated AppSec tools across the SDLC.
DAST scanner for discovering and testing APIs and web apps for vulns.
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Common questions about comparing Secure Decisions ASTAM vs Probely (Snyk API & Web) for your dynamic application security testing needs.
Secure Decisions ASTAM: DHS-funded program providing automated AppSec tools across the SDLC. built by Secure Decisions. headquartered in United States. 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..
Probely (Snyk API & Web): DAST scanner for discovering and testing APIs and web apps for vulns. built by Probely. headquartered in Portugal. 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..
Both serve the Dynamic Application Security Testing market but differ in approach, feature depth, and target audience.
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