Introduction
Web apps, APIs, single-page apps and cloud-native services change weekly, sometimes daily. Security testing has to keep pace. Akamai's 2026 report found that 87% of survey respondents reported an API-related security incident in 2025.
Dynamic application security testing (DAST) tests a running application from the outside in. It sends controlled requests and attack payloads, then analyzes responses. No source code is required.
This guide compares five tools: Burp Suite DAST, Invicti, ZAP, Rapid7 InsightAppSec and OpenText Fortify DAST. We look at coverage, authentication, API support, CI/CD fit, reporting, pricing model and limits. We also cover when expert-led testing is still needed.
Key Takeaways
- DAST sends attack payloads to a deployed app and flags exploitable runtime weaknesses.
- Fit depends on architecture, authentication, API surface and team capacity, not brand.
- ZAP is the free option; the other four are commercial platforms.
- No independent benchmark ranks all five, so run your own proof of concept.
- Treat DAST as a complement to SAST, SCA and manual penetration testing, not a replacement.
Overview of Dynamic Application Security Testing for US Organizations
What DAST does
A DAST scanner crawls or interacts with a running web app, API or service. It looks for issues such as SQL injection, cross-site scripting, authentication flaws and server misconfiguration, as the OWASP DevSecOps Guideline lists.
Where it fits in the SDLC
NIST's Secure Software Development Framework (SSDF, 2022) calls for testing executable code before release, including dynamic testing in automated suites. In practice:
- Run targeted scans in development or staging.
- Add suitable checks to CI/CD pipelines.
- Schedule broader scans where they won't disrupt environments.
Coverage boundaries
OWASP notes that dynamic testing can't cover 100% of an application, so you still need to examine attack-surface coverage. A clean scan isn't proof of safety. Expect trouble with:
- Complex or multi-step authentication
- Undocumented APIs
- Business logic abuse
- Rate limits and scan noise
- Flaws that need source-code or infrastructure context
The tools below are compared for fit across US enterprise, mid-market, regulated and SaaS teams. Verify current product details with each vendor before buying.
Best Dynamic Application Security Testing Tools
These picks reflect DAST capability, web and API coverage, authenticated testing, automation, reporting, scalability, support and documented limits. Feature volume alone didn't drive the order.
Burp Suite DAST (PortSwigger)
PortSwigger renamed Burp Suite Enterprise Edition to Burp Suite DAST in April 2025. It suits teams that already use Burp for manual testing and want automated scanning across a portfolio.
- Chromium-based scanning of modern web apps
- OpenAPI, SOAP WSDL, Postman Collections and GraphQL scanning
- Recorded logins for complex flows such as SSO
- CI integration and a GraphQL API to trigger scans and pull findings
- Confidence ratings, with manual validation for lower-confidence findings
- HTML and PDF reports, with OWASP Top 10 2025 and PCI DSS v4.0.1 compliance reporting
Interpreting and validating findings takes security skill.
| Field | Detail |
|---|---|
| Pricing | Pay-as-you-scan: annual license fee plus monthly scanning-hour charges |
| Deployment | Cloud-hosted or self-hosted, including Kubernetes/Helm |
| Key limit | GraphQL scanning requires introspection; AI login recording doesn't support MFA; Postman environments and scripts unsupported |
Invicti
Invicti (formerly Netsparker, rebranded in 2022) targets teams that want automated validation and less noise. Its proof-based scanning safely exploits many common vulnerabilities to confirm them, though not every finding.
- Web apps, SPAs and REST, SOAP and GraphQL APIs
- Imports for OpenAPI/Swagger, Postman, RAML, WADL and WSDL
- Login Sequence Recorder, OTP, OAuth 2.0, client certificates and multiple privilege-level credentials
- Jenkins, GitHub, GitLab and Azure DevOps integrations, plus API and CLI
- One-time and recurring schedules; PDF and HTML reports including OWASP Top 10 and PCI DSS
Manual review is still needed for findings without proof.
| Field | Detail |
|---|---|
| Pricing | Quote-based; licenses count FQDN targets and target variations |
| Deployment | On-demand cloud and on-premises options; the AppSec pricing page currently marks on-premises as coming soon |
| Key limit | API scans can change or delete production data; login sequences with secrets are on-demand only |
ZAP
ZAP (Zed Attack Proxy) is free, Apache 2.0 open-source software. It left OWASP in September 2023 and is now an independent project supported by Checkmarx. It suits security teams, developers and educators who want control.
- Active and passive scanning, with spiders (the project now recommends Client Spider for modern apps)
- Add-ons for OpenAPI, SOAP, GraphQL and Postman
- Form, JSON, HTTP/NTLM, script and browser authentication
- YAML Automation Framework, Docker, API and command line
- HTML, JSON, SARIF, Markdown, PDF and XML reports
Expect to tune scans and verify alerts by hand.
| Field | Detail |
|---|---|
| Pricing | Free; no paid enterprise SLA is published |
| Deployment | Self-run software or Docker; Java 17 minimum from 2.16.0 |
| Key trade-off | Only the latest full release is supported, and you own maintenance and tuning |
Rapid7 InsightAppSec
Rapid7's Application Security (InsightAppSec) is a cloud-accessed DAST with cloud or on-premises scan engines. It fits teams already in Rapid7's ecosystem.
- Modern web apps and APIs: SOAP via WSDL, REST via Swagger, GraphQL by schema or URL
- Login via recorded traffic/HAR or Selenium files; Basic, NTLM and Kerberos
- Jenkins, Azure, GitHub Actions, GitLab CI/CD, Jira and ServiceNow integrations
- Scan schedules and blackouts
- Attack Replay, so developers can validate vulnerabilities and test patches
- PCI DSS and OWASP Top Ten reporting
| Field | Detail |
|---|---|
| Pricing | From US$175 per month per app, billed annually; unlimited and concurrent scanning included |
| Deployment | Cloud app with cloud or on-prem scan engines |
| Key limit | On-prem engines need 6 GB RAM and supported Windows editions; confirm OAuth/token detail and changed-only scanning with Rapid7 |
OpenText Fortify DAST
OpenText Fortify DAST (the official 26.2.0 guide still references Fortify WebInspect) suits enterprises wanting AppSec governance across the Fortify portfolio.
- Web apps, APIs and services; SOAP, REST, OpenAPI, Postman, GraphQL and gRPC
- Static and dynamic authentication, macro-derived tokens and two-factor environments
- Incremental scans that audit changed areas and merge into a baseline
- Remediation scans that revisit known findings
- ScanCentral DAST with Jenkins and Azure DevOps, scheduled and CI-triggered scans
| Field | Detail |
|---|---|
| Pricing | No public price list; ask for a quote |
| Deployment | Off-cloud, SaaS and AppSec-as-a-service variants; requirements differ by package |
| Key limit | Official guidance focuses on Windows; confirm SPA framework support and compliance templates with OpenText |
How We Chose the Best Dynamic Application Security Testing Tools
We avoided common shortcuts that skew tool comparisons:
- Trusting a review score alone
- Assuming broad AST coverage means strong DAST
- Ignoring authentication
- Comparing license price without counting implementation and remediation effort
Only Invicti appears in the recent Miercom 2026 assessment, and Invicti sponsored it. That assessment can't crown a five-tool winner.
Application coverage
- Web apps, REST and GraphQL APIs, SPAs and microservices
- Authenticated and role-based workflows
- Documented API import formats
Automation and workflow
- CI/CD plugins, CLI or API access
- Incremental or targeted scanning
- Ticketing integrations and staging support
Result quality and operations
- False-positive controls and proof of exploit
- Severity prioritization and remediation guidance
- Reporting formats and audit evidence
- Expertise needed to tune the scanner
Organizational factors
Weigh these factors against your environment and team:
- Data sensitivity and regulatory obligations
- Cloud or hybrid deployment
- Staffing capacity and scan volume
- Software alone versus software plus expert validation
Reports from these tools do not establish compliance by themselves.
Conclusion
The best DAST tool reaches your real attack surface, handles your authentication and APIs, fits your delivery pipeline and produces findings your team can act on.
Before committing, run a proof of concept against representative apps. Compare:
- Coverage
- Scan noise
- Remediation workflow
- Deployment effort
- Reporting
- Total cost
Automated scanning also has a ceiling. OWASP's testing guide says these tools are generic and often miss serious flaws tied to business logic and custom design. Manual testing fills that gap.
DeepSeas isn't a DAST vendor. It offers practitioner-led offensive security: human-led penetration testing, adversary simulation and vulnerability assessments across networks, applications and cloud. Its testers hold OSCP, OSCE and OSWP certifications.
Its cloud penetration testing includes free remediation retesting within six months. Pair a scanner with expert testing for logic flaws, complex attack paths and regulated environments.
Frequently Asked Questions
What is the best DAST tool?
It depends on your application types, authentication, APIs, CI/CD needs, budget and team skill. Open-source ZAP offers flexibility; commercial platforms add support and governance.
What does a DAST tool test?
It tests a running app or API for injection, cross-site scripting, weak authentication or session handling, exposed endpoints and misconfiguration. Coverage varies by tool and configuration.
What is the difference between DAST and SAST?
DAST tests a deployed app from the outside without source code. SAST analyzes source code from the inside. Using both gives broader coverage.
Can DAST tools test APIs and authenticated applications?
Most modern tools support API definitions, tokens, recorded logins or sessions. Verify support for your exact authentication method, API format and roles.
Are there free or open-source DAST tools?
ZAP is the prominent one, licensed Apache 2.0. Expect more configuration, maintenance and expertise than with a commercial platform.
Is DAST enough to secure an application?
No. Combine it with SAST, SCA, secrets scanning, manual penetration testing, secure configuration and monitoring.
