A Caido alternative,
scanner included.
Caido pulled a lot of testers off Burp with a lighter, Rust-based proxy and a clean plugin system. Its active scanner is a community plugin, not a shipped feature. Hugin is the free alternative that ships the scanner built in — with proxy, repeater, intruder and a race engine in one binary.
what ships · what's paywalled · what's actually better
Caido has a more polished plugin ecosystem, a cloud-connected workflow and real momentum. Its UI is more mature than Hugin's, and if your work is built around Caido's plugins, staying is the right call.
Hugin vs
Caido
The rows that decide it, not all forty.
| Hugin | Caido | |
|---|---|---|
| Price | Free · Pro €10/mo | Freemium |
| Written in | Rust | Rust |
| Active scanner built in | ✓ | ~ plugin |
| Intercepting proxy | ✓ | ✓ |
| Repeater / replay | ✓ | ✓ |
| Race condition engine | ✓ | ✗ |
| HTTP/3 (QUIC) proxy | ✓ | ✗ |
| Fully local, no account | ✓ | ~ cloud features |
| AI agent over MCP | ✓ | ~ |
Asked
anyway.
Is there a free alternative to Caido?
Yes. Hugin's Community tier is free with a built-in active and passive scanner, proxy, repeater, intruder and race-condition engine. Caido's free tier covers the proxy tooling with limits on projects; its active scanner is a community plugin rather than a shipped feature.
Does Caido have an active scanner?
Not built in. Caido's core is proxy, replay, automate, sitemap and plugins, with an active scanner available as a community plugin. Hugin's active scanner is built in and free, with 64 active and 48 passive checks mapped to the OWASP and API Top 10.
Caido vs Hugin — which should I use?
If you want a mature plugin ecosystem and a cloud workflow, Caido. If you want a free, native binary with the scanner, intruder and race engine already in it, and no plugin to install first, Hugin. Both are Rust, both are lighter than the Java incumbent.
The tool,
and the how-to.
Run it
yourself.
No sign-up, no card. Download and run.
The other
head-to-heads.
Free Burp Suite Alternative — Hugin vs Burp
Burp Suite Professional is the industry standard and it costs $499 a year. Hugin is the same shape of tool — intercepting proxy, active and passive scanner, intruder, repeater, sequencer — that runs natively, offline, and free for personal and educational use.
Burp vs ZAP — and Where Hugin Fits
The usual question is whether to pay $499 for Burp Suite Professional or use ZAP for free. Hugin is the free option that is neither a JVM desktop app nor a scriptable library — one native binary, proxy, scanner, intruder, repeater and an AI agent.
Caido vs Burp — and the Free Alternative
Caido is the modern, Rust-based proxy that has pulled a lot of Burp users. Burp is still the incumbent. Hugin is the third point: like Caido it is native, unlike Caido it ships an active scanner in the box.
Free Burp Collaborator Alternative — Self-Hosted OOB
Burp Collaborator is the out-of-band server that catches the bugs you cannot see in a response: blind SSRF, blind RCE, blind XXE. It is a Professional-only feature. Hugin's Oastify does the same job over 8 protocols, from your own infrastructure, at a tenth of the price.
Burp Intruder Alternative — Full Speed, Free
Burp Intruder is throttled to a demo in the free Community Edition; the real thing sits behind the $499/year Professional licence. Hugin's intruder is unthrottled and free — sniper, pitchfork, cluster bomb and battering ram, with payload generators and processors.
Free Burp Scanner Alternative — 64 Active Checks
Burp's web vulnerability scanner is a Professional-only feature and there is no free edition of it. Hugin's scanner ships in the free Community tier: 64 active checks and 48 passive checks, mapped to the OWASP and API Top 10, with no rate limit.
Burp Repeater Alternative — Free, Native
Burp Repeater is free in Community Edition and Hugin's is free too — this page is about the difference a native repeater makes, not about price. Hand-edit any request, replay it, diff the responses, and move on.
Burp Decoder, Comparer & Sequencer Alternatives
Burp's Decoder, Comparer and Sequencer ship free in Community Edition, so this is a fair fight rather than a paywall story. Hugin has all three, and adds a composable transform chain and a sequencer that runs the FIPS 140-2 randomness tests.
Free Web Application Vulnerability Scanner
The web application vulnerability scanner is the most-paywalled tool in security testing. Burp's is Professional-only at $499 a year. ZAP's is free and open source. Hugin's is in the free Community tier with no rate limit. Three honest options, one table.
mitmproxy vs Burp Suite — and Where Hugin Fits
mitmproxy and Burp are often framed as rivals, but they are built for different work. mitmproxy is a scriptable, terminal-first proxy that automation is written against. Burp is a GUI suite a person drives by hand. Hugin sits closer to Burp's shape and adds the parts Burp paywalls.
Burp Community Edition — What's Missing
Burp Suite Community Edition is genuinely free and genuinely capable — proxy, Repeater, Decoder, Sequencer and Comparer. What it does not have is a scanner, an unthrottled Intruder, out-of-band testing or project saving. This page shows exactly which parts are free and which are not.
OWASP ZAP Alternative — Native, No JVM
OWASP ZAP is the reference free scanner: open source, scriptable, and able to do almost anything through its API and add-ons. If what you want is a desktop suite with a built-in scanner and no Java runtime, Hugin is the same job in a single native binary. This page is honest about where ZAP is ahead.
The full feature matrix
Every capability, every tier, side by side.