Side by side
Toxiproxy vs Tumult
Both stand on chaos engineering platforms. Which one you can start free with, which one lets you read the code, and what each costs once you pay.
Free plan APILinuxMac+2
Toxiproxy gives developers control over TCP connection conditions for failure testing in development and CI. Keep its unauthenticated API away from untrusted networks, and match client-library versions to the server.
Visit Toxiproxy Free plan APILinuxMac+3
Choose Tumult if you want an open-source, self-hosted platform for authoring and controlling resilience experiments, with audit and telemetry analysis built in. Look elsewhere if experiment scheduling is required or if your deployment cannot accept the script-plugin security boundary.
Visit TumultThe facts
| Toxiproxy | Tumult | |
|---|---|---|
| Free plan | Yes | Yes |
| Open source | Not published | Not published |
| Runs on | API, Linux, Mac, Self-hosted, Windows | API, Linux, Mac, Self-hosted, Web, Windows |
| Lowest paid plan | Free or on request | Not published |
| Plans published | 1 | None |
| Maker | Not published | Not published |
| Website | github.com | tumult.rs |
| On chaos engineering platforms | #13 of 25 | #17 of 25 |
Toxiproxy: what it does well
- Free with an MIT license.
- Simulates latency, jitter, packet loss, and other conditions.
- Provides API, CLI, and language client libraries.
- Exposes Prometheus-compatible metrics.
- Runs on Linux, macOS, and Windows.
What to know first
- HTTP API is unauthenticated by default.
- Version 2.x is incompatible with version 1.x clients.
- Not designed for cloud fault injection.
- Ephemeral ports can cause random port conflicts.
Tumult: what it does well
- Open source under the Apache-2.0 license.
- Provides 91 chaos actions across 16 plugins.
- Supports gated approvals, quorum, TTL, and content-hash pinning.
- Includes emergency stop, stop-all switch, and hash-chained audit trail.
- Stores telemetry in DuckDB with SQL queries and Parquet export.
What to know first
- Self-hosted deployment requires installing the binary or Docker image.
- No experiment scheduling is supported.
- Script plugins can execute arbitrary commands if a registered plugin is malicious.
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