Cloud · head to head
Dokku vs OWASP ZAP
Dokku
Cloud
Single-server platform that accepts a git push and runs Heroku buildpacks on Docker
- From
- Free
- Rated
- -
OWASP ZAP
Cybersecurity
Free, open-source web application scanner and intercepting proxy, now governed by the Software Security Project.
- From
- Free
- Rated
- -
The short version
- Each has a real cost: Dokku one maintainer accounts for nearly all human commit activity and the project records roughly 10,500 US dollars of annual income on Open Collective, which is not enough to fund a maintainer, so continuity rests on one person continuing to volunteer.; OWASP ZAP authenticated scanning of modern single-page applications is the hard part and ZAP makes you build it by hand: session handling, token refresh and login scripts are configured per application, and a misconfigured session means the scanner logs itself out and reports a clean result for pages it never reached.
- They diverge on capability: Dokku covers Git push deploy, OWASP ZAP covers Intercepting proxy.
- Prices and features above were last checked on 31 August 2026.
Where they differ
Only the attributes on which Dokku and OWASP ZAP actually diverge.
Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).
What each one covers
Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.
Only in Dokku
- Git push deploy
- Heroku buildpacks
- Datastore plugins
- Automatic certificates
- Zero downtime deploys
- Pluggable schedulers
Only in OWASP ZAP
- Intercepting proxy
- Passive scanner
- Active scanner
- AJAX spider
- Automation Framework
- Headless daemon and REST API
- Docker images
- Add-on marketplace
What people use each for
The jobs each tool is most often brought in to do.
Dokku
- Running a dozen side projects and client applications on one virtual private server with Heroku style deploymentnot OWASP ZAP
- Moving off a managed platform when the monthly bill has grown faster than the traffic hasnot OWASP ZAP
- A consultancy that wants buildpack deployments without teaching every client team Kubernetesnot OWASP ZAP
- Keeping a legacy Procfile application alive on hardware you control after a managed platform deprecates its stacknot OWASP ZAP
OWASP ZAP
- Adding a baseline security scan to every application's pipeline where per-target commercial licensing would limit coverage to a handfulnot Dokku
- Manual penetration testing that needs an intercepting proxy, request replay and fuzzing without a paid licence per testernot Dokku
- Teaching developers what an attack against their own endpoint looks like, using a tool they can install themselvesnot Dokku
- Pre-release regression scanning of an internal application that would never justify a commercial DAST subscriptionnot Dokku
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Dokku
- One maintainer accounts for nearly all human commit activity and the project records roughly 10,500 US dollars of annual income on Open Collective, which is not enough to fund a maintainer, so continuity rests on one person continuing to volunteer.
- Dokku Pro asks 849 US dollars for a lifetime licence from a project with no disclosed legal entity behind the promise and no published refund terms, while the product is still described as in development at early bird pricing.
- Dokku is single-server by design, and the k3s scheduler that provides multi-node support is missing log retrieval, process inspection and content-based health checks, with a post-run hook the documentation says does not consistently fire.
- Supported operating systems are limited to Ubuntu 22.04 or 24.04 and Debian 11 or later, so organisations standardised on Red Hat, Rocky or Alma Linux cannot run it on their approved base image.
- Backups are separate commands per datastore plugin that you schedule yourself, with no unified snapshot, no point-in-time recovery and no tested restore path, so verifying that a restore works is entirely your responsibility.
OWASP ZAP
- Authenticated scanning of modern single-page applications is the hard part and ZAP makes you build it by hand: session handling, token refresh and login scripts are configured per application, and a misconfigured session means the scanner logs itself out and reports a clean result for pages it never reached.
- There is no support contract in the product, so when a scan breaks the day before a release the escalation path is a GitHub issue and a community chat, which is not an answer that satisfies a delivery manager or an auditor who wants a named responsible party.
- Active scanning sends genuine attack traffic, so it can create records, trigger emails, exhaust rate limits or destabilise a fragile environment, and pointing it at production without prior agreement produces an incident rather than a test result.
- Output needs triage: passive rules generate large volumes of low-severity informational findings about headers and cookie flags that bury the few results that matter, and a team without someone tuning the rule set stops reading the report within a few sprints.
- As a dynamic scanner it can only test what it can reach, so authorisation flaws between accounts, business logic abuse and anything behind an undiscovered endpoint go unreported, and a passing ZAP scan is evidence of nothing more than the absence of the classes of bug it looks for.
Pricing, plan by plan
Dokku
Free- DokkuFree
- MIT licensed, no usage limits
- Command line and SSH only
- All datastore and certificate plugins
- Dokku Pro$849/one-time
- Lifetime licence with free upgrades and no subscription
- Covers 1 production and 2 pre-production servers
- Web dashboard and JSON REST API
OWASP ZAP
Free- Free & Open SourceFree
- Full functionality
- Active & passive scanning
- Spider
Which should you pick?
Choose Dokku if
- You need git push deploy.
- You want to start without paying.
- You work on Linux, Docker, CLI, Self-hosted.
- You also want heroku buildpacks.
Choose OWASP ZAP if
- You need intercepting proxy.
- You want to start without paying.
- You work on Desktop, Cli, Api.
- You also want passive scanner.
Questions people ask
- Is Dokku or OWASP ZAP better?
- Neither clearly leads. Dokku starts at Free and OWASP ZAP at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Dokku or OWASP ZAP?
- Dokku starts at Free and OWASP ZAP at Free.
- Does Dokku or OWASP ZAP run on more platforms?
- Dokku runs on Linux, Docker, CLI, Self-hosted. OWASP ZAP runs on Desktop, Cli, Api.
- Can I use Dokku for free?
- Both have a free tier, so you can try either at no cost before committing.
- What is Dokku best used for?
- Dokku is most often used for running a dozen side projects and client applications on one virtual private server with heroku style deployment, moving off a managed platform when the monthly bill has grown faster than the traffic has, a consultancy that wants buildpack deployments without teaching every client team kubernetes, keeping a legacy procfile application alive on hardware you control after a managed platform deprecates its stack. Of those, running a dozen side projects and client applications on one virtual private server with heroku style deployment and moving off a managed platform when the monthly bill has grown faster than the traffic has are not what OWASP ZAP is typically brought in for.
- What can Dokku do that OWASP ZAP cannot?
- Dokku covers Git push deploy, Heroku buildpacks, Datastore plugins, Automatic certificates. OWASP ZAP covers Intercepting proxy, Passive scanner, Active scanner, AJAX spider.
Answered from the vendors’ own pages
Dokku: Is Dokku still maintained?
Yes. Version 0.38.27 shipped in August 2026 with roughly six releases in the preceding two months. The caveat is that one maintainer writes nearly all of it.
OWASP ZAP: Is it still called OWASP ZAP?
The project left OWASP in August 2024 and is now governed by the Software Security Project, with core development sponsored by Checkmarx. The tool is now just ZAP, though most existing documentation, courses and search results still use the OWASP name.
Dokku: What does Dokku Pro give me over the free edition?
A web dashboard, a JSON REST API, git push over HTTPS, browser log tailing, team management and email support from the maintainers. It costs 849 US dollars once for one production and two pre-production servers.
OWASP ZAP: Is it free for commercial use?
Yes. It is Apache 2.0 licensed, with no per-application, per-scan or per-user cost, and it can be used and modified commercially without a licence agreement.
Dokku: Can Dokku run across multiple servers?
Only through the k3s or Nomad schedulers. The k3s path is missing several commands and health check types, and the older Kubernetes scheduler is deprecated and no longer developed.
OWASP ZAP: Can it replace a penetration test?
No. It automates checks for known vulnerability classes against endpoints it can reach. It does not reason about business logic, chain findings into an attack, or test authorisation between accounts, which is most of what a tester actually does.
Dokku: Will my Heroku application run on it unchanged?
Usually. Dokku runs the same buildpacks and reads a Procfile, so the application layer normally moves across. Add-ons, scaling behaviour and backups are the parts you have to rebuild.
OWASP ZAP: Does it run in CI?
Yes, through the official Docker images and the Automation Framework, which defines scan jobs in YAML so configuration lives in the repository. A baseline passive scan is the usual starting point because it is fast and non-intrusive.
OWASP ZAP: How does it compare to Burp Suite?
Burp Suite Professional is the more polished manual testing tool and has a stronger scanner and extension ecosystem, but it is licensed per tester and Burp Suite Enterprise per target. ZAP is the better fit where cost per target is the binding constraint; many teams use both.
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