Toxiproxy
Toxiproxy: A focused, open-source network fault simulator for developer test environments. Ranked #18 of 25 in Chaos Engineering Platforms by our editors (7.5/10); pricing: Free plan; best for network fault simulation for developers.
At a glance
- Editor score7.5 / 10
- PricingFree plan
- Best forNetwork fault simulation for developers
- Free planYes
- Paid fromFree
- Kubernetes supportNo
- Facts checked20 Sep 2026
Where it wins
- Free, open-source, and available across Windows, macOS, and Linux
- Simulates latency, jitter, bandwidth limits, resets, outages, and packet loss
- Offers HTTP API, CLI, Prometheus-compatible metrics, and many language clients
Where it doesn't
- No Kubernetes support
- No cloud failure injection
- No experiment scheduling or managed cloud service
Our verdict on Toxiproxy
Toxiproxy is an open-source TCP proxy for simulating network and system conditions in development, continuous integration, and testing environments. Developers route test connections through the proxy, then apply controlled faults through its HTTP API, command-line interface, or client libraries. It is available for Windows, macOS, Linux, API-based use, and self-hosted deployments, making it a fit for teams that need repeatable network-condition testing without a managed service.
Its main strength is focused network fault simulation. Toxiproxy supports latency and jitter injection, bandwidth throttling, timeouts, connection resets, service outages, and packet-loss simulation. Teams can configure toxic probability and direction, while the Prometheus-compatible metrics endpoint provides a way to observe proxy activity. Client integrations cover Ruby, Go, Python, Node.js, Java, Haskell, Rust, Elixir, PHP, and .NET. This combination suits developers who want to introduce targeted TCP-level conditions into test connections and CI workflows.
Toxiproxy is distributed as free, open-source software with self-hosted binaries or containers. That keeps the product focused, but teams are responsible for operating the deployment rather than using a managed cloud chaos-testing service. It does not provide Kubernetes support, cloud failure injection, or experiment scheduling, so it is not a match for organizations seeking broader infrastructure-level chaos workflows or centrally scheduled experiments. Choose Toxiproxy for developer-led network testing and controlled TCP fault injection; choose an alternative when Kubernetes, cloud environments, or scheduled experiments are core requirements.
Questions about Toxiproxy
What does Toxiproxy run on? Windows, macOS and Linux. It runs self-hosted.
What does Toxiproxy integrate with? 10 integrations, including Ruby, Go, Python, Node.js and Java.
Who is Toxiproxy built for? Small businesses, mid-market companies and enterprises (our editorial estimate).
Your product? Our editors can test Toxiproxy in depth and publish a review, labelled as paid · from $149/mo →
Toxiproxy pricing
Toxiproxy fact sheet
| Free plan | Yes |
|---|---|
| Paid from | Free |
| Kubernetes support | No |
| Cloud fault injection | No |
| Network fault injection | Yes |
| Experiment scheduling | No |
| Deployment model | Self_hosted |
| Blast-radius controls | Yes |
| Deployment | Self-hosted |
| Platforms | Windows, macOS, Linux |
| Support | Community, Docs |
| Built for | Small business, Mid-market, Enterprise (editorial estimate) |
| Integrations | 10 integrations: Ruby, Go, Python, Node.js, Java, Haskell … |
| Pricing | Free plan |
| Website | github.com |
| Facts checked | 20 Sep 2026 |
Toxiproxy integrations
Toxiproxy lists 10 integrations on its own site.
- Ruby
- Go
- Python
- Node.js
- Java
- Haskell
- Rust
- Elixir
- PHP
- .NET
Alternatives to Toxiproxy
- Chaos ToolkitBroad, low-cost multi-cloud chaos testing with declarative experiments and safeguards.9.3
- Chaos MeshA broad, self-hosted toolkit for controlled Kubernetes fault injection.9.1
- Harness Chaos EngineeringA free hybrid-cloud option with strong experiment controls and broad infrastructure coverage.9.0
See all Toxiproxy alternatives →
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Featured on iTechGuides
Toxiproxy is listed in our Chaos Engineering Platforms directory. Add the badge to your site — it links back to this page.
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Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026
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