Promptfoo vs WebArena
Promptfoo
promptfoo.devWebArena
webarena.devSide by side
| Figure | Promptfoo | WebArena |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | Yes | — |
| Web | Yes | — |
| Windows | Yes | — |
| macOS | Yes | — |
| Linux | Yes | — |
| API | Yes | — |
| Self-hosted | Yes | Yes |
| Plans published | 3 | 0 |
| Spec score · LLM Evaluation Tools | 8.4 (#6) | 6.8 (#26) |
| Evaluation | It tests prompts across multiple providers, grades outputs with assertions, and calculates accuracy, safety, and performance metrics. | Evaluation checks information-seeking answers against annotated references and can programmatically check intermediate execution states. |
| License | The open-source project is distributed under the MIT license. | The WebArena code repository identifies its license as Apache-2.0. |
| Self-hosting | Community runs locally, while Enterprise On-Premise provides self-hosted deployment, network isolation, dedicated runners, and customer-managed infrastructure. | The project provides Docker resources and a pre-installed Amazon Machine Image for hosting the benchmark websites. |
Plans
In their own words
Promptfoo
Promptfoo helps developers and enterprises evaluate prompts and test AI applications for security risks. It compares prompt outputs across multiple models in a web view. Red-team testing simulates users to look for prompt injections, jailbreaks, data leaks, business rule violations and insecure agent tool use. Its getting-started guide lists more than 60 providers, including OpenAI, Anthropic, Google and local models such as Ollama. Integrations include CI systems such as GitHub Actions, GitLab CI, Jenkins, Azure Pipelines, CircleCI and Bitbucket Pipelines, plus Splunk, Burp Suite, Google Sheets and MCP. Installation is available through npm, npx or Homebrew. Promptfoo requires Node.js 22.22.0 or newer and recommends Node.js 24 LTS. The free Community plan includes all LLM evaluation features and 10k red-team probes per month, and can run locally or be self-hosted. Enterprise includes managed cloud deployment; On-Premise runs on customer infrastructure. Promptfoo says it is based in San Francisco, is now part of OpenAI and remains open source.