Mahimahi
Mahimahi: A focused, free Linux toolkit for controlled link-condition and HTTP replay workflows. Ranked #22 of 30 in Network Simulation Software by our editors (7.0/10); pricing: Free plan; best for HTTP and link-condition emulation.
At a glance
- Editor score7.0 / 10
- PricingFree plan
- Best forHTTP and link-condition emulation
- Free planYes
- Paid fromFree
- Facts checked20 Sep 2026
Where it wins
- Models rate, delay, loss, and intermittent connectivity
- Records and replays multi-origin HTTP/HTTPS sessions
- Visualizes live throughput and delay during emulation
Where it doesn't
- Runs on Linux rather than across multiple operating systems
- Operates from the command line and is distributed as source
- Focuses on emulation instead of broad topology simulation
Our verdict on Mahimahi
Mahimahi is a free, GPL-licensed suite of user-space network-emulation and analysis tools for researchers, network-protocol designers, and web developers. It creates lightweight, composable network containers that can reproduce link rates, one-way delay, packet loss, intermittent connectivity, and throughput conditions from packet-delivery traces. Its HTTP tools also record and replay multi-origin sessions, letting unmodified browsers and other client programs run under controlled network conditions. Mahimahi is designed for Linux and operated from the command line.
Its strongest fit is controlled web-performance and protocol measurement. The toolkit combines fixed or variable link-rate emulation, stochastic packet-loss modeling, delay controls, and on/off connectivity conditions in composable shells. That structure suits work where individual network conditions need to be combined or varied rather than represented only as a single preset. Live throughput and delay visualization adds an immediate view of how a client session responds during an emulation run. The published feature set also includes automation API support, which can help incorporate emulation into repeatable workflows.
Mahimahi’s main trade-off is focus. It provides a specialized emulation model and a concentrated set of HTTP recording, replay, and visualization tools, rather than a broad topology simulator. The Linux-only, source-distributed, command-line approach is better suited to technical users who want direct control over network conditions than to teams seeking a cross-platform graphical environment. Choose Mahimahi for HTTP measurement, link-condition experiments, and protocol research on Linux. An alternative broad topology simulator may be a better fit for users who need a wider network-modeling scope or a different operating environment.
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Mahimahi pricing
Mahimahi fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Simulation model | Emulation |
| Real-time emulation | Not verified |
| Hardware-in-the-loop | Not verified |
| Deployment options | Not verified |
| Documented node limit | Not verified |
| Automation API | Yes |
| Deployment | Self-hosted |
| Platforms | Linux |
| Support | Docs |
| Built for | Solo, Small business, Mid-market (editorial estimate) |
| Pricing | Free plan |
| Website | mahimahi.mit.edu |
| Facts checked | 20 Sep 2026 |
Alternatives to Mahimahi
- GNS3A free, broad multivendor lab for simulating, emulating, and connecting real networks.9.4
- Cisco Modeling LabsA Cisco-focused virtual lab with broad automation, integration, and deployment options.9.2
- EVE-NGA broad emulation platform for large, collaborative multivendor network labs.9.0
See all Mahimahi alternatives →
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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
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