Proxyman Alternative - A Modern HTTP Debugging Proxy

Looking for a Proxyman alternative that fits your workflow?

Proxyman is a well-crafted tool. Its native macOS app is genuinely polished, and for Mac-centric mobile debugging it has earned its reputation. But it is paid per device, its free tier stops at a single debugging rule, and it lives at the HTTP layer. If you want something free for personal use, identical on every desktop OS, and able to go down to the packet level, that is where Fluxzy comes in.

Download Fluxzy Desktop - Free

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Different tools fit different needs. Here is what we hear from developers who have looked beyond Proxyman.

The free tier is a demo, not a tool. Proxyman's free plan caps you at one debugging rule and locks out WebSocket inspection and the advanced tools. The moment you need a second Map Local entry or a breakpoint alongside it, you are on the paid plan. A Standard license is 89 USD for a single device with one year of updates, and keeping current after that means paying again.

Licenses are counted per device. One Standard seat covers one machine. If you debug on a desktop and a laptop, that is the 99 USD Personal plan, and the iOS and Android companion apps are part of the bundle rather than the base license. For teams, plans start at five seats minimum.

macOS is the flagship. Proxyman was born as a native Mac app, and it shows, in a good way, on macOS. Windows and Linux builds exist, but the Mac app is where the product leads. If your team is spread across all three desktop platforms and you want one identical tool everywhere, that asymmetry matters.

It stops at HTTP. Proxyman is an application proxy. It does not capture raw packets, it has no TLS fingerprint control, and its source is closed. When a problem lives below the HTTP layer, you reach for a second tool.

If you want native HTTP/2 support, packet-level capture, an open-source core, and a free desktop experience, that is where Fluxzy comes in.

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Here is how the two tools compare across key capabilities:

Capability	Proxyman	Fluxzy Desktop
Price	89 USD per device (1 year of updates), free tier limited to 1 rule	Free for personal use
Free tier limits	1 debugging rule, no WebSocket, no advanced tools	None, the full app is free
Platforms	macOS (flagship), Windows, Linux	Windows, macOS, Linux, same features everywhere
HTTP/2 Support	✅ Yes	✅ Yes
HTTP/3 Support	❌ No	🔄 Coming soon
WebSocket	✅ Paid tier	✅ Included
Safari WebSocket capture (macOS)	❌ No (Safari WebSockets bypass the system proxy)	✅ Yes, via transparent capture
gRPC	✅ Yes	✅ Yes
Breakpoints	✅ Paid tier	✅ Included
Map Local / Map Remote / Mock	✅ Paid tier, per-tool dialogs	✅ Composable rule engine, included
Scripting / Rules	JavaScript snippets attached in the GUI	YAML or visual editor, composable, versionable
Throttling	✅ Yes	✅ Yes
Transparent / Proxyless Capture	❌ No	✅ Preview (Windows, macOS, Linux)
Raw Packet Capture (PCAP)	❌ No	✅ Native support
Wireshark Export	⚠️ TLS key logging only, packets need a second tool	✅ Yes (PCAPNG + NSS keys)
TLS Fingerprinting	❌ No	✅ Yes
Open Source Core	❌ No (proprietary)	✅ Yes (Fluxzy.Core)
CLI for Automation	⚠️ Companion commands, GUI-first	✅ Full feature parity
LLM API Decoding (OpenAI, Anthropic)	❌ No	✅ Yes
Session Saving	✅ Paid tier	✅ Unlimited, included

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Proxyman's free plan is capped at a single debugging rule, which makes it hard to evaluate anything beyond basic capture. Fluxzy Desktop is completely free for hobbyists and individual developers, and the free version is the full version: breakpoints, mocking, WebSocket inspection, unlimited rules, unlimited sessions, no upgrade prompts.

We offer paid licenses for professional and workplace use, which is how we sustain development.

Proxyman is a superb macOS citizen first, with Windows and Linux versions alongside. Fluxzy takes the opposite bet: one codebase, one feature set, one interface on Windows, macOS, and Linux. Built on Tauri with a Rust shell around an open .NET core, it stays light on every platform. If your team mixes operating systems, nobody gets the second-class build.

Proxyman is an application proxy, and a good one, but it works at the request and response layer. It can log TLS keys for you, yet it does not capture the packets those keys decrypt, so the moment a problem lives below HTTP (a stalled handshake, a retransmission, a connection reset) you are juggling a second capture tool and aligning two timelines by hand.

Fluxzy collapses that into one session. It operates at the HTTP, transport, and TLS layers at the same time, and a single rule can act on any of them. Native PCAP capture exports straight to Wireshark, and with NSS key logging you get fully decrypted TLS alongside packet-level timing, retransmissions, and handshake detail, right next to the HTTP view.

Proxyman captures desktop traffic by routing applications through a proxy. Apps that ignore the system proxy, ship their own network stack, or pin their own configuration simply never show up.

Safari is the textbook case. Since Apple changed WebKit's networking, WebSocket connections from Safari (and from any app using URLSessionWebSocketTask) bypass the macOS system proxy entirely. Proxyman documents this limitation itself: Safari WS/WSS traffic goes straight to the internet and never reaches the proxy, unless you toggle an experimental WebKit feature as a workaround. If you are debugging a live web app in Safari, the very traffic you care about is invisible to a proxy-based tool.

Fluxzy adds transparent capture (in preview), which intercepts traffic at the operating system's network layer instead. Because nothing needs to opt into a proxy, Safari WebSockets are captured like any other connection, along with every other app on the machine, on Windows, macOS, and Linux. Read how transparent capture works.

Proxyman is GUI-first. Its scripting tool is powerful, but the JavaScript snippets, Map Local entries, and breakpoints you configure live inside the app on that machine. Its command-line surface is a companion to the GUI, not a replacement, so automating against Proxyman means working around the desktop app.

Fluxzy is built the other way around. The exact rules you create while debugging in the desktop app are the exact rules Fluxzy CLI runs, expressed as the same YAML:

• Capture and shape traffic interactively in the desktop app
• Export the rule set to YAML
• Run that identical YAML headless in CI/CD
• Drop it into a Docker container
• Reuse it across an automated test suite

Your debugging session and your automation are the same artifact, not two things you keep in sync by hand.

Fluxzy.Core is open source and available on GitHub. You can audit every interception mechanism, every cryptographic decision, every stream transformation. Proxyman is proprietary, so what happens inside the proxy is a black box you take on trust. The Fluxzy desktop app is freeware built on top of this open core.

When Proxyman proxies a connection it presents its own TLS signature, and there is no way to change it. Servers that fingerprint TLS to spot proxies, or to tell one client apart from another, will see "a proxy", which can quietly skew the very behavior you are trying to test.

Fluxzy lets you control that fingerprint. Using BouncyCastle alongside the native .NET TLS stack, it can reproduce the cryptographic handshake of a specific client, so the server on the far end sees the client you are impersonating rather than the tool in the middle.

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If you know Proxyman, you already know the jobs you want to do. Here is how each one is handled in Fluxzy, and where the approach differs.

Proxyman filters by app, domain, and content with regex support. Fluxzy uses a composable filter system with 50+ filter types: host, path, method, status code, headers, cookies, content type, process name, and more, combined with AND/OR logic and saved as reusable presets. The same filters that scope what you see can also scope which rules fire.

In Proxyman, each behavior is its own tool with its own window: Map Local, Map Remote, Breakpoint, Scripting, Block List, Allow List, Network Conditions, DNS Spoofing. Fluxzy folds all of that into a single composable rule engine with 50+ actions:

• Add, update, or remove headers
• Inject authentication (Basic, Bearer)
• Mock responses with custom status codes and bodies
• Serve local files instead of remote content (the Map Local job)
• Redirect requests to another host (the Map Remote job)
• Spoof DNS
• Add delays and throttle bandwidth
• Inject HTML or JavaScript into pages

Every rule can be edited visually or written directly in YAML, and the two are interchangeable. Instead of recreating a stack of per-machine tool configurations, you version one rule file and share it.

Proxyman's scripting tool runs JavaScript against matching flows, which is flexible but ties the logic to the app. In Fluxzy, most rewriting jobs are declarative YAML rules that need no code at all, and because the CLI runs the same YAML, the logic travels to CI, containers, and teammates unchanged. For cases that do need code, the open-source .NET core lets you go as deep as you want.

Like Proxyman, Fluxzy can pause traffic so you can inspect and edit it live, and it does so in the free version. Multi-level breakpoints let you stop at both the request and the response stage of the same exchange, then modify, continue, or abort.

HTTP/1.1, HTTP/2, and WebSocket are captured with full detail, individual HTTP/2 streams and WebSocket frames included, with WebSocket available in the free version. gRPC is decoded directly. And OpenAI and Anthropic chat completion calls are parsed natively, including streamed responses, which is handy when debugging AI agents.

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Fluxzy does not read Proxyman log files directly, but it imports HAR. Proxyman can export any session to HAR, so the path across is simple: export from Proxyman, import into Fluxzy, and keep working.

If you know Proxyman, you will recognize the mental model. Traffic list on one side, details on the other. Filters to narrow down. Breakpoints to pause. The tools you reach for in Proxyman (Map Local, Map Remote, Scripting, Network Conditions, DNS Spoofing) all have a counterpart in the Fluxzy rule engine.

One rule engine instead of many tools. Proxyman configures each behavior through its own window. Fluxzy expresses all of them as composable rules you can edit visually or as YAML, then share with your team, version control, or run in a pipeline.

Deeper protocol access. Proxyman shows you HTTP. Fluxzy shows you HTTP, transport, and TLS. You can see packet-level timing, retransmissions, and TLS negotiation details, and export the whole thing to Wireshark.

Every platform is the flagship. No Mac-first, ported-later split. Windows, macOS, and Linux run the same app with the same features.

No license pressure. You will never hit a 1-rule ceiling or a locked WebSocket tab. The free version is the full version.

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Yes, and without the asterisks. There is no single-rule cap, no locked advanced tools, and no per-device seat counting, which are the limits you hit on Proxyman's free plan. Fluxzy Desktop is fully featured and free for hobbyists and individual developers. We fund development through paid licenses for professional and workplace use.

For core HTTP debugging tasks (traffic inspection, modification, breakpoints, mapping, mocking, throttling, DNS spoofing), yes. Fluxzy also adds capabilities Proxyman does not have, such as raw packet capture, Wireshark export with decryption keys, TLS fingerprinting, transparent proxyless capture, an open-source core, and a CLI with full feature parity. Proxyman, in turn, has a very polished native macOS experience, dedicated iOS and Android companion apps, and AI assistant integrations, which can matter depending on your needs.

Yes, with full feature parity across Windows, macOS, and Linux. Proxyman also ships on all three, but it is a macOS product first. Fluxzy treats every platform as the primary one: same features, same interface, same experience.

You can capture plain HTTP without any certificate. To read HTTPS traffic in clear text you install and trust the Fluxzy root certificate, exactly as you install and trust the Proxyman certificate today. The mechanism is identical, only the tool changes.

Fluxzy does not open Proxyman log files directly, but it imports HAR. Export your session from Proxyman as HAR, then import it into Fluxzy.

With Fluxzy's transparent capture, yes. Safari's WebSocket implementation bypasses the macOS system proxy by design, so proxy-based tools like Proxyman cannot see Safari WS/WSS traffic without an experimental WebKit workaround. Fluxzy's transparent capture works at the OS network layer, below proxy settings, so Safari WebSockets show up like any other connection.

Yes. Point the device's proxy settings at Fluxzy and install the root certificate, the same manual setup that every debugging proxy supports. Proxyman offers companion mobile apps that smooth this flow on its paid Personal plan; with Fluxzy the standard proxy setup is free.

If you are weighing those tools instead of, or alongside, Proxyman, we cover them in detail on the Charles alternative page, the Fiddler alternative page, and the mitmproxy alternative page.

Yes, and this is a first-class use case, unlike Proxyman which is GUI-first. Fluxzy CLI uses the exact same engine as the desktop app. Define rules in YAML, run them headless in CI/CD. Capture traffic in containers. Generate PCAP files for analysis.

The core engine (Fluxzy.Core) is open source and available on GitHub. You can audit every interception mechanism, every cryptographic decision, every stream transformation. Proxyman is proprietary. The Fluxzy desktop app is freeware built on top of this open core.

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Download Fluxzy Desktop

Available for Windows, macOS, and Linux. Free forever for personal use.

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• Documentation: Full user guide and reference
• GitHub: Open source core engine

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Built for modern development workflows. Give it a try and see if it fits.