Best Rhesis AI Alternatives in 2026
Updated
20 apps from AI LLM evaluation tools ranked against Rhesis AI on the same published basis.
- 1Rhesis AI vs Vellum
- 2Rhesis AI vs Weights & Biases
- 3Rhesis AI vs Evidently AI
- 4Rhesis AI vs Promptfoo
- 5Rhesis AI vs DeepEval
- 6Rhesis AI vs Giskard
- 7Rhesis AI vs Opik
- 9Rhesis AI vs Braintrust
- 10Rhesis AI vs Confident AI
- 11Rhesis AI vs Galileo
- 12Rhesis AI vs Langfuse
- 13Rhesis AI vs LangSmith
- 14Rhesis AI vs LangWatch
- 15Rhesis AI vs Maxim AI
- 16Rhesis AI vs NVIDIA NeMo Evaluator
- 17Rhesis AI vs Arize Phoenix
- 18Rhesis AI vs LM Evaluation Harness
- 19Rhesis AI vs RAGChecker
- 20Rhesis AI vs Inspect AI
- 21Rhesis AI vs OpenAI Evals
Rhesis AI alternatives compared
| # | App | Score | Free plan | From | Runs on |
|---|---|---|---|---|---|
| 1 | Vellum | 6.7 | Free plan | $30/mo | Android, Browser, iOS, Mac, self-hosted, Web, Windows |
| 2 | Weights & Biases | 6.7 | Free plan | $60/mo | API, iOS, Linux, Mac, self-hosted, Web, Windows |
| 3 | Evidently AI | 6.6 | Free plan | $80/mo | API, Linux, Mac, self-hosted, Web, Windows |
| 4 | Promptfoo | 6.6 | Free plan | Free | API, Linux, Mac, self-hosted, Web, Windows |
| 5 | DeepEval | 6.5 | Free plan | Free | Linux, Mac, self-hosted, Windows |
| 6 | Giskard | 6.5 | Free plan | Free | API, Linux, self-hosted, Web |
| 7 | Opik | 6.5 | Free plan | $19/mo | API, Linux, self-hosted, Web |
| 9 | Braintrust | 6.4 | Free plan | $249/mo | API, self-hosted, Web |
| 10 | Confident AI | 6.4 | Free plan | $200/mo | API, self-hosted, Web |
| 11 | Galileo | 6.4 | Free plan | $100/mo | API, self-hosted, Web |
| 12 | Langfuse | 6.4 | Free plan | $29/mo | API, self-hosted, Web |
| 13 | LangSmith | 6.4 | Free plan | $39/mo | API, self-hosted, Web |
| 14 | LangWatch | 6.4 | Free plan | €29/mo | API, Linux, self-hosted, Web |
| 15 | Maxim AI | 6.4 | Free plan | $29/mo | API, self-hosted, Web |
| 16 | NVIDIA NeMo Evaluator | 6.4 | Free plan | Free | API, Linux, self-hosted |
| 17 | Arize Phoenix | 6.3 | Free plan | Free | API, self-hosted, Web |
| 18 | LM Evaluation Harness | 6.3 | Free plan | Free | API, Linux, self-hosted |
| 19 | RAGChecker | 6.3 | Free plan | Free | self-hosted |
| 20 | Inspect AI | 6.2 | Free plan | Free | API, Browser |
| 21 | OpenAI Evals | 5.5 | No | — | API, self-hosted, Web |
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Questions about Rhesis AI alternatives
What is the best alternative to Rhesis AI?
Vellum, number 1 in AI LLM evaluation tools with a score of 6.7 out of 10. The others here: Weights & Biases, Evidently AI, Promptfoo and 16 more.
What is the best free alternative to Rhesis AI?
Vellum is the best-ranked alternative with a free plan. 19 of the 20 alternatives here publish a free plan on their own pricing pages.
How are these alternatives ranked?
Ranked free-and-open first: a usable free tier and open-source code, then the platforms it runs on and its documentation.