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Rank Model Price
1
Open Source
2
Open Source
3
Open Source
4
Open Source
5
Open Source

Just the Highlights

Promptfoo

Rank #1
Open Source

The CI/CD Standard. It treats prompts like code, integrating directly into GitHub Actions to block PRs if they degrade model performance. Its matrix view allows you to test 50 prompts against 10 models simultaneously.

Ragas

Rank #2
Open Source

The RAG Specialist. The industry standard for 'Reference-Free' evaluation. It uses judge models to mathematically score your retrieval pipeline on Faithfulness, Context Relevancy, and Answer Correctness without needing human ground truth.

DeepEval (Confident AI)

Rank #3
Open Source

The Unit Test Framework. Designed to look and feel exactly like Pytest. It allows developers to write 'assert_faithfulness' checks in their existing test suites, bringing LLM testing into the standard TDD loop.

Giskard

Rank #4
Open Source

The Security Scanner. While others test for accuracy, Giskard scans for vulnerabilities. It automatically generates thousands of adversarial attacks (injections, hallucinations, bias) to find holes in your logic before deployment.

Opik (Comet)

Rank #5
Open Source

The Developer's Choice. A lightweight, fast evaluation platform that focuses on 'Tracing as Testing'. It allows you to click on any step in a production trace and instantly turn it into a regression test case.