# Locust vs Puppeteer

**Leader by Vioscale score:** Puppeteer

| Attribute | Locust | Puppeteer |
|---|---|---|
| **Vioscale score** | 60.6 (43% (low)) | 68.9 (67% (medium)) |
| activity.commits_last_30d | 36 | 90 |
| adoption.dependent_repos | 1,883 | 144,056 |
| adoption.github_stars | 28,103 | 95,498 |
| adoption.package_downloads_weekly | - | 12,005,633 |
| deployment.options | `{"self_hosted":true}` | `{"self_hosted":true}` |
| description.long | A Python-based tool for performance testing that simulates thousands of concurrent users to stress-test web applications. Tests are written as plain Python code and can run distributed across multiple machines. | Puppeteer provides programmatic control over browser instances, enabling automated navigation, interaction, and inspection of web pages through a high-level API. It supports both Chrome and Firefox and runs in headless mode by default. |
| features.capabilities | `{"languages":"Python","parallel_execution":true}` | `{"languages":"JavaScript","browser_automation":true}` |
| integrations.count | - | 5 |
| integrations.list | - | `[{"name":"Chrome"},{"name":"Firefox"},{"name":"DevTools Protocol"},{"name":"WebDriver BiDi"},{"name":"chrome-devtools-mcp"}]` |
| language.primary | Python | TypeScript |
| license.spdx | MIT | Apache-2.0 |
| platform.support | `{"cli":true}` | `{"cli":true,"web":true}` |
| pricing | `{"type":"open_source","freeTier":true,"sourceUrl":"https://locust.io","retrievedAt":"2026-08-16T21:32:24.662Z"}` | `{"type":"open_source","freeTier":true,"sourceUrl":"https://pptr.dev/","retrievedAt":"2026-08-13T23:06:39.390Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | open_source |
| pricing.price_level | free | free |
| pricing.transparent | yes | yes |
| release.cadence_days | 10 | - |
| release.history | `[{"url":"https://github.com/locustio/locust/releases/tag/2.46.4","date":"2026-08-23T11:40:06Z","type":"stable","version":"2.46.4"},{"url":"https://github.com/locustio/locust/releases/tag/2.46.3","date":"2026-08-01T10:10:38Z","type":"stable","version":"2.46.3"},{"url":"https://github.com/locustio/locust/releases/tag/2.46.2","date":"2026-07-24T19:57:38Z","type":"stable","version":"2.46.2"},{"url":"https://github.com/locustio/locust/releases/tag/2.46.1","date":"2026-07-21T18:53:03Z","type":"stable","version":"2.46.1"},{"url":"https://github.com/locustio/locust/releases/tag/2.46.0","date":"2026-07-19T14:29:10Z","type":"stable","version":"2.46.0"},{"url":"https://github.com/locustio/locust/releases/tag/2.45.0","date":"2026-07-09T08:10:23Z","type":"stable","version":"2.45.0"},{"url":"https://github.com/locustio/locust/releases/tag/2.44.4","date":"2026-06-18T12:24:58Z","type":"stable","version":"2.44.4"},{"url":"https://github.com/locustio/locust/releases/tag/2.44.3","date":"2026-06-12T10:57:24Z","type":"stable","version":"2.44.3"},{"url":"https://github.com/locustio/locust/releases/tag/2.44.2","date":"2026-06-12T10:39:49Z","type":"stable","version":"2.44.2"},{"url":"https://github.com/locustio/locust/releases/tag/2.44.1","date":"2026-06-01T22:32:28Z","type":"stable","version":"2.44.1"},{"url":"https://github.com/locustio/locust/releases/tag/2.44.0","date":"2026-05-11T20:31:38Z","type":"stable","version":"2.44.0"},{"url":"https://github.com/locustio/locust/releases/tag/2.43.4","date":"2026-04-01T20:32:51Z","type":"stable","version":"2.43.4"},{"url":"https://github.com/locustio/locust/releases/tag/2.43.3","date":"2026-02-12T09:46:25Z","type":"stable","version":"2.43.3"},{"url":"https://github.com/locustio/locust/releases/tag/2.43.2","date":"2026-02-01T10:45:39Z","type":"stable","version":"2.43.2"},{"url":"https://github.com/locustio/locust/releases/tag/2.43.1","date":"2026-01-12T19:21:45Z","type":"stable","version":"2.43.1"},{"url":"https://github.com/locustio/locust/releases/tag/2.43.0","date":"2025-12-30T08:49:59Z","type":"stable","version":"2.43.0"},{"url":"https://github.com/locustio/locust/releases/tag/2.42.6","date":"2025-11-29T17:31:00Z","type":"stable","version":"2.42.6"},{"url":"https://github.com/locustio/locust/releases/tag/2.42.5","date":"2025-11-20T16:28:32Z","type":"stable","version":"2.42.5"},{"url":"https://github.com/locustio/locust/releases/tag/2.42.4","date":"2025-11-20T11:27:05Z","type":"stable","version":"2.42.4"},{"url":"https://github.com/locustio/locust/releases/tag/2.42.3","date":"2025-11-15T10:32:37Z","type":"stable","version":"2.42.3"}]` | `[{"url":"https://github.com/puppeteer/puppeteer/releases/tag/puppeteer-v25.9.0","date":"2026-08-25T07:40:50Z","type":"stable","version":"puppeteer-v25.9.0"},{"url":"https://github.com/puppeteer/puppeteer/releases/tag/puppeteer-core-v25.9.0","date":"2026-08-25T07:40:51Z","type":"stable","version":"puppeteer-core-v25.9.0"},{"url":"https://github.com/puppeteer/puppeteer/releases/tag/puppeteer-v25.8.0","date":"2026-08-17T09:12:45Z","type":"stable","version":"puppeteer-v25.8.0"},{"url":"https://github.com/puppeteer/puppeteer/releases/tag/puppeteer-core-v25.8.0","date":"2026-08-17T09:12:46Z","type":"stable","version":"puppeteer-core-v25.8.0"},{"url":"https://github.com/puppeteer/puppeteer/releases/tag/browsers-v3.2.1","date":"2026-08-17T09:12:47Z","type":"stable","version":"browsers-v3.2.1"},{"url":"https://github.com/puppeteer/puppeteer/releases/tag/puppeteer-v25.7.0","date":"2026-08-13T18:40:18Z","type":"stable","version":"puppeteer-v25.7.0"},{"url":"https://github.com/puppeteer/puppeteer/releases/tag/puppeteer-core-v25.7.0","date":"2026-08-13T18:40:19Z","type":"stable","version":"puppeteer-core-v25.7.0"},{"url":"https://github.com/puppeteer/puppeteer/releases/tag/puppeteer-v25.6.0","date":"2026-08-11T13:11:24Z","type":"stable","version":"puppeteer-v25.6.0"},{"url":"https://github.com/puppeteer/puppeteer/releases/tag/puppeteer-core-v25.6.0","date":"2026-08-11T13:11:26Z","type":"stable","version":"puppeteer-core-v25.6.0"},{"url":"https://github.com/puppeteer/puppeteer/releases/tag/browsers-v3.2.0","date":"2026-08-11T13:11:27Z","type":"stable","version":"browsers-v3.2.0"},{"url":"https://github.com/puppeteer/puppeteer/releases/tag/puppeteer-v25.5.0","date":"2026-08-04T09:44:48Z","type":"stable","version":"puppeteer-v25.5.0"},{"url":"https://github.com/puppeteer/puppeteer/releases/tag/puppeteer-core-v25.5.0","date":"2026-08-04T09:44:49Z","type":"stable","version":"puppeteer-core-v25.5.0"},{"url":"https://github.com/puppeteer/puppeteer/releases/tag/browsers-v3.1.0","date":"2026-08-04T09:44:50Z","type":"stable","version":"browsers-v3.1.0"},{"url":"https://github.com/puppeteer/puppeteer/releases/tag/puppeteer-v25.4.0","date":"2026-07-27T12:29:39Z","type":"stable","version":"puppeteer-v25.4.0"},{"url":"https://github.com/puppeteer/puppeteer/releases/tag/puppeteer-core-v25.4.0","date":"2026-07-27T12:29:40Z","type":"stable","version":"puppeteer-core-v25.4.0"},{"url":"https://github.com/puppeteer/puppeteer/releases/tag/puppeteer-v25.3.0","date":"2026-07-01T12:30:22Z","type":"stable","version":"puppeteer-v25.3.0"},{"url":"https://github.com/puppeteer/puppeteer/releases/tag/puppeteer-core-v25.3.0","date":"2026-07-01T12:30:23Z","type":"stable","version":"puppeteer-core-v25.3.0"},{"url":"https://github.com/puppeteer/puppeteer/releases/tag/browsers-v3.0.6","date":"2026-07-01T12:30:24Z","type":"stable","version":"browsers-v3.0.6"},{"url":"https://github.com/puppeteer/puppeteer/releases/tag/puppeteer-v25.2.1","date":"2026-06-24T12:30:41Z","type":"stable","version":"puppeteer-v25.2.1"},{"url":"https://github.com/puppeteer/puppeteer/releases/tag/puppeteer-core-v25.2.1","date":"2026-06-24T12:30:42Z","type":"stable","version":"puppeteer-core-v25.2.1"}]` |
| security.scorecard | 4.8 | 7.8 |
| security.vulnerabilities | `{"count":1,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=locust&per_page=100","last_12m":0,"max_severity":"MODERATE"}` | `{"count":1,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=puppeteer&per_page=100","last_12m":0,"max_severity":"MODERATE"}` |

## Capabilities (Testing Tools)

| Capability | Locust | Puppeteer |
|---|:--:|:--:|
| **Core** |  |  |
| Test types | - | - |
| Browser automation | - | ✓ |
| Built-in assertion library | - | - |
| Languages | Python | JavaScript |
| **Isolation** |  |  |
| Mocking / stubbing | - | - |
| **Techniques** |  |  |
| Snapshot testing | - | - |
| **Performance** |  |  |
| Parallel execution | ✓ | - |
| **Insight** |  |  |
| Code coverage | - | - |
| **DX** |  |  |
| Watch mode | - | - |
| **Ops** |  |  |
| CI integration | - | - |

*Source: Vioscale. Generated 2026-09-01T17:35:54.012Z. "-" = undocumented, not absent.*