Most bug bounty hunters end up with one of these two tools at the center of their setup, and the choice rarely comes down to a single killer feature. Burp Suite and OWASP ZAP are both intercepting proxies. Both let you catch a request, edit a parameter, and replay it until something breaks in an interesting way. The differences show up in the details: how much you get without paying, how well the tool handles automation, and how comfortable it feels after six hours of staring at HTTP responses. What follows is a practical comparison for people who test web targets for money, reputation points, or both.
Burp Suite is PortSwigger's commercial proxy. The Community Edition is free and gives you the proxy, Repeater, Intruder, Decoder, Comparer, and Sequencer. The Professional edition is a paid annual per-user license that adds the scanner, the Collaborator out-of-band interaction server, and the ability to save project files. Enterprise is licensed separately for organizations that need scheduled scanning at scale.
OWASP ZAP was a flagship OWASP project for years and is now maintained under the Software Security Project. It is free, open source, and has no paid tier. That matters more than it sounds: the active scanner, the fuzzer, the spider, and the automation framework are all included, with no feature gating.
If your work is mostly manual — tracing a single authorization flaw through twenty requests, comparing responses byte by byte — Burp is the more comfortable instrument. Repeater tabs are fast to duplicate, the message editor handles large bodies without choking, and keyboard shortcuts become muscle memory within a week. Match & Replace rules let you strip a CSRF header or swap a user agent across an entire session without touching each request.
Two Pro features earn their price for bounty work specifically. The Collaborator server catches blind SSRF, XXE, and out-of-band injection in places where you'd otherwise guess. Session handling rules and macros let you keep a rolling authentication token fresh while you fuzz, which is the difference between a clean Intruder run and a wall of 401s.
ZAP's manual side has improved a lot. The HUD puts tools inside the browser, the Request Editor is workable, and context-based authentication handles login flows well once configured. It still feels less fluid for rapid-fire request surgery, and the history interface is harder to skim when you're looking for the one response that differed.
This is where the free-versus-paid split really bites. Burp Community has no scanner and throttles Intruder, so you can't brute-force a parameter set without a paid license. ZAP gives you the full active scanner, a fuzzer, an AJAX spider for JavaScript-heavy apps, and OpenAPI/SOAP import for API targets — all free.
ZAP is also built for headless work. You can run a baseline scan in a CI pipeline with a single Docker command, define multi-step authentication and crawling in a YAML automation plan, and drive everything through a REST API. For hunters who monitor a broad attack surface or script repetitive recon against many hosts, that automation layer saves hours every week.
Burp Pro's scanner is generally more accurate on authenticated, stateful applications, and it slots naturally into a manual session you're already running. But you can't schedule it headlessly the way you can with ZAP, and it costs money.
Bug bounty income is uneven, especially early on. ZAP's zero cost is a genuine advantage when you're testing twenty targets a month and still deciding whether the Pro license pays for itself.
One caution that applies to either tool: read the program's rules before pointing an active scanner at a target. Many bounty programs restrict or prohibit automated scanning, and a fast scanner can knock over a fragile staging environment. Stay inside scope, respect rate limits, and keep the heavy automation for programs that explicitly allow it.
You don't have to choose. They coexist well. Chain them as upstream proxies — point ZAP at Burp, or Burp at ZAP — so traffic passes through both and each tool sees the same history. In practice, most hunters use one as their daily driver and open the other for a specific job: ZAP for a scheduled scan, Burp for a gnarly authentication flow.
Keep your scope rules duplicated in both, and note in your report which tool produced a finding if it came from automated scanning. Reviewers appreciate the distinction between "the scanner flagged this" and "I confirmed this manually."
If you're starting out or testing on a tight budget, learn ZAP properly. It's free, the scanner is real, and its automation pays off fast. If you're hunting seriously and manual testing is where your findings come from, Burp Professional is worth the subscription — Collaborator and the polished Repeater alone justify it for many hunters.
If you can only pick one and money isn't the constraint, make Burp your primary and keep ZAP installed for automation. If money is the constraint, do the reverse, and spend the savings on a VPS for your scans.
Photo: MabelAmber / Pixabay
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