# Chaos Toolkit vs Gremlin

**Leader by Vioscale score:** Chaos Toolkit

| Attribute | Chaos Toolkit | Gremlin |
|---|---|---|
| **Vioscale score** | 40.3 (59% (medium)) | 18.4 (77% (high)) |
| activity.commits_last_30d | 7 | - |
| adoption.dependent_repos | 30 | - |
| adoption.github_stars | 2,020 | - |
| deployment.options | `{"self_hosted":true}` | `{"cloud":true}` |
| description.long | An open-source framework that lets developers declare and execute chaos engineering experiments using code files, enabling discovery of system weaknesses through intentional disruption and integration with CI/CD pipelines. | A chaos engineering platform that intentionally injects failures into systems to identify vulnerabilities before they impact users. Provides forward-looking reliability scores and tools to help teams prove their systems can withstand real-world failure scenarios. |
| integrations.count | - | 1 |
| integrations.list | - | `[{"name":"Jira"}]` |
| language.primary | Python | - |
| license.spdx | Apache-2.0 | - |
| market.availability | - | `{"primaryMarkets":["US","EU"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true}` | `{"cli":true,"web":true,"linux":true}` |
| pricing | `{"type":"open_source","summary":"Free and open source under Apache 2 license","freeTier":true,"sourceUrl":"https://chaostoolkit.org","retrievedAt":"2026-08-18T12:51:25.086Z"}` | `{"type":"quote","summary":"Custom pricing based on deployment size—contact sales for quote","sourceUrl":"https://www.gremlin.com/pricing","retrievedAt":"2026-08-18T12:50:46.586Z"}` |
| pricing.free_tier | yes | - |
| pricing.model | open_source | quote |
| pricing.price_level | free | unknown |
| pricing.transparent | yes | no |
| release.cadence_days | 50 | - |
| release.history | `[{"url":"https://github.com/chaostoolkit/chaostoolkit/releases/tag/1.20.0","date":"2026-08-08T17:36:45Z","type":"stable","version":"1.20.0"},{"url":"https://github.com/chaostoolkit/chaostoolkit/releases/tag/1.19.0","date":"2024-02-20T11:39:37Z","type":"stable","version":"1.19.0"},{"url":"https://github.com/chaostoolkit/chaostoolkit/releases/tag/1.18.0","date":"2024-01-14T15:23:18Z","type":"stable","version":"1.18.0"},{"url":"https://github.com/chaostoolkit/chaostoolkit/releases/tag/1.17.1","date":"2024-01-14T12:59:23Z","type":"stable","version":"1.17.1"},{"url":"https://github.com/chaostoolkit/chaostoolkit/releases/tag/1.17.0","date":"2024-01-11T16:18:52Z","type":"stable","version":"1.17.0"},{"url":"https://github.com/chaostoolkit/chaostoolkit/releases/tag/1.16.0","date":"2023-09-12T11:17:49Z","type":"stable","version":"1.16.0"},{"url":"https://github.com/chaostoolkit/chaostoolkit/releases/tag/1.15.1","date":"2023-04-03T14:27:05Z","type":"stable","version":"1.15.1"},{"url":"https://github.com/chaostoolkit/chaostoolkit/releases/tag/1.15.0","date":"2023-01-29T15:58:34Z","type":"stable","version":"1.15.0"},{"url":"https://github.com/chaostoolkit/chaostoolkit/releases/tag/1.14.0","date":"2023-01-27T11:56:16Z","type":"stable","version":"1.14.0"},{"url":"https://github.com/chaostoolkit/chaostoolkit/releases/tag/1.13.0","date":"2022-09-29T09:25:50Z","type":"stable","version":"1.13.0"},{"url":"https://github.com/chaostoolkit/chaostoolkit/releases/tag/1.12.0","date":"2022-02-25T09:14:47Z","type":"stable","version":"1.12.0"},{"url":"https://github.com/chaostoolkit/chaostoolkit/releases/tag/1.11.0","date":"2022-01-05T16:08:02Z","type":"stable","version":"1.11.0"},{"url":"https://github.com/chaostoolkit/chaostoolkit/releases/tag/1.10.1","date":"2021-10-27T12:27:38Z","type":"stable","version":"1.10.1"},{"url":"https://github.com/chaostoolkit/chaostoolkit/releases/tag/1.10.0","date":"2021-10-04T13:15:59Z","type":"stable","version":"1.10.0"},{"url":"https://github.com/chaostoolkit/chaostoolkit/releases/tag/1.9.6","date":"2021-08-26T10:47:01Z","type":"stable","version":"1.9.6"},{"url":"https://github.com/chaostoolkit/chaostoolkit/releases/tag/1.9.5","date":"2021-08-26T10:42:59Z","type":"stable","version":"1.9.5"},{"url":"https://github.com/chaostoolkit/chaostoolkit/releases/tag/1.9.3","date":"2021-08-24T08:30:17Z","type":"stable","version":"1.9.3"},{"url":"https://github.com/chaostoolkit/chaostoolkit/releases/tag/1.9.2","date":"2021-08-16T10:08:18Z","type":"stable","version":"1.9.2"},{"url":"https://github.com/chaostoolkit/chaostoolkit/releases/tag/1.9.1","date":"2021-05-31T06:17:26Z","type":"stable","version":"1.9.1"},{"url":"https://github.com/chaostoolkit/chaostoolkit/releases/tag/1.9.0","date":"2021-02-18T10:52:58Z","type":"stable","version":"1.9.0"}]` | - |
| security.gdpr | - | yes |
| security.scorecard | 3.7 | - |
| security.soc2 | - | yes |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=chaostoolkit&per_page=100","last_12m":0,"max_severity":null}` | - |

## Capabilities (Chaos Engineering)

| Capability | Chaos Toolkit | Gremlin |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Fault injection scope | - | - |
| Blast radius control | - | - |
| Automated abort safety | - | - |
| Kubernetes native | - | - |
| Scheduling gameday orchestration | - | - |
| Observability integration | - | - |
| Experiment as code | - | - |
| Agent based | - | - |
| RBAC access control | - | - |
| Deployment model | - | - |
| SOC2 | - | - |
| Open source | - | - |
| Pricing model | - | - |

*Source: Vioscale. Generated 2026-09-01T16:33:36.382Z. "-" = undocumented, not absent.*