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Toxiproxy vs clumsy: catalog facts
Toxiproxy	clumsy
Best for: Developers testing how applications handle network failures	Best for: Developers testing apps under lag, packet loss or bad connections
Free Free and open source under the MIT license.	Free Free and open source under the MIT licence.
Self-hosted, Command line	Windows
Simulates latency, bandwidth limits, and connection failures Controls proxies through an HTTP API All 3 strengths for Toxiproxy Simulates latency, bandwidth limits, and connection failures Controls proxies through an HTTP API Supports deterministic network fault testing	Works on any application without proxy or code changes Supports TCP and UDP, including localhost traffic All 4 strengths for clumsy Works on any application without proxy or code changes Supports TCP and UDP, including localhost traffic Portable, with no installation Interactive controls with visual feedback
Requires applications to route test connections through the proxy	Windows only Still at version 0.3
Downloadable app, Self-hosted	Downloadable app
Open source	Open source
License: MIT	License: MIT
Not stated if an account is needed	No account needed
Not stated if it works offline	Offline features available
Official website Full listing and sources Sources for Toxiproxy github.com/shopify/toxiproxy Catalog checked October 8, 2026	Official website Full listing and sources Sources for clumsy jagt.github.io/clumsy Catalog checked October 2, 2026

“Not stated” means we have not confirmed it. Features can vary by device and plan.