opik vs promptfoo
LLM tracing and evaluation tools compared
opik and promptfoo both help teams evaluate LLM applications. opik combines tracing, evaluation, and production monitoring in a platform, while promptfoo focuses on prompt and model comparisons, red-teaming, and CI/CD checks.
opik: Trace, Evaluate, and Monitor LLM Applications
Opik is Comet’s open-source platform for tracing, evaluating, and monitoring LLM applications, RAG systems, and AI agents. It combines framework integrations, datasets and experiments, prompt tools, and production dashboards, with cloud and self-hosted options.
promptfoo: Evaluate and Red-Team LLM Apps
Promptfoo is a TypeScript CLI and library for evaluating and red-teaming LLM-based apps. Compare prompts and models, scan for vulnerabilities, and run checks in CI/CD, with evaluations performed locally.
| opik | promptfoo | |
|---|---|---|
| Language | Python | TypeScript |
| License | Apache-2.0 | MIT |
| Stars | 22.8k | 26.4k |
| Forks | 1.9k | 2.6k |
| Last analyzed | Oct 22, 2026 | Oct 24, 2026 |
Key differences
- opik traces nested model calls, tools, retrieval, and agent workflows; promptfoo compares prompt and model outputs and tests applications for vulnerabilities.
- opik includes production dashboards, online evaluation, datasets, experiments, and prompt tools; promptfoo centers on automated evaluations and security checks.
- opik is built with Python and TypeScript SDKs, a web application, and a backend; promptfoo is a TypeScript CLI and library.
- opik is licensed under Apache-2.0; promptfoo is licensed under MIT.
- opik can run through Comet Cloud or be self-hosted; promptfoo describes evaluations as local and is available through its CLI or Node.js package.
- opik supports evaluation in CI/CD through a PyTest integration; promptfoo supports CI/CD evaluation and security checks.
Choose opik if you…
- need to inspect multi-step agent, tool, and retrieval traces
- want production monitoring alongside datasets, experiments, and evaluations
- need the option to use Comet Cloud or self-host the platform
Choose promptfoo if you…
- want to compare prompts and models across supported providers
- need red-team tests or vulnerability scans for an LLM application
- want a TypeScript CLI or Node.js package for local evaluations and CI/CD checks
Compare the numbers side by side, or add more projects
This comparison is generated with AI from the OSRepos analyses of both projects. Always check each project's repository and documentation before choosing.