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ZAP

Automated web app security scanner for developers and pentesters

ZAP automatically discovers security flaws in web applications during development and testing, offering both automated scanning and manual testing tools for developers and seasoned penetration testers.

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Overview

Overview

ZAP (Zed Attack Proxy) is a free, community‑driven web application security scanner that helps you identify vulnerabilities early in the development lifecycle. It supports automated scans that can be integrated into CI/CD pipelines as well as manual testing features such as an intercepting proxy, making it suitable for both developers and experienced penetration testers.

Capabilities & Deployment

Built on Java and available as a Docker image, ZAP can be run locally, in containers, or as part of automated test suites. Its extensible architecture allows add‑ons to enhance functionality, while integration tests and live Docker releases simplify continuous security testing. Whether you need quick vulnerability checks or deep manual exploration, ZAP provides a flexible, enterprise‑grade solution without licensing costs.

Highlights

Automated vulnerability detection across web applications
Manual testing tools including intercepting proxy and spider
Seamless CI/CD integration via Docker and command‑line interfaces
Extensible add‑on ecosystem for custom security checks

Pros

  • Free, Apache‑2.0 licensed with no commercial fees
  • Large, active community and frequent updates
  • Supports both automated scans and hands‑on testing
  • Docker images simplify deployment and isolation

Considerations

  • Requires a Java runtime environment
  • Full UI can be resource‑intensive on low‑spec machines
  • Steeper learning curve for advanced manual features
  • Out‑of‑the‑box reporting may need customization for some workflows

Managed products teams compare with

When teams consider ZAP, these hosted platforms usually appear on the same shortlist.

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Looking for a hosted option? These are the services engineering teams benchmark against before choosing open source.

Fit guide

Great for

  • Developers who want security testing integrated early
  • QA teams adding security checks to CI/CD pipelines
  • Penetration testers needing a flexible, scriptable scanner
  • Organizations seeking a cost‑free, enterprise‑grade solution

Not ideal when

  • Environments without Java or Docker support
  • Teams requiring only a lightweight CLI‑only scanner
  • Projects that need guaranteed commercial support SLAs
  • Users focused exclusively on non‑web API security testing

How teams use it

CI/CD Pipeline Integration

Automatically scan each build and prevent deployment of vulnerable releases

Manual Security Assessment

Use the intercepting proxy to explore application behavior and uncover hidden issues

Docker‑Based Testing Environment

Spin up an isolated ZAP container for repeatable scans in any environment

Security Training

Provide hands‑on experience for developers learning secure coding practices

Tech snapshot

Java75%
HTML24%
Python1%
JavaScript1%
Shell1%
Lex1%

Tags

opensourcezap-developmentzaproxydasthacktoberfestsecurity-scannerzapsecurityappsec

Frequently asked questions

What types of applications can ZAP scan?

ZAP scans any web application regardless of the backend language or framework.

How do I run ZAP using Docker?

Pull the official image and start it with `docker run -u zap -p 8080:8080 owasp/zap2docker-stable`.

Is ZAP free for commercial use?

Yes, ZAP is released under the Apache‑2.0 license and can be used commercially at no cost.

Can ZAP be extended with custom functionality?

Yes, ZAP supports add‑ons and scripts to tailor scans and integrate with other tools.

Do I need to purchase a license to use ZAP?

No, ZAP is open source and does not require any licensing fees.

Project at a glance

Active
Stars
14,640
Watchers
14,640
Forks
2,494
LicenseApache-2.0
Repo age10 years old
Last commitlast week
Primary languageJava

Last synced 2 days ago