Promptfoo vs Braintrust vs PromptLayer vs Arize Phoenix
A side-by-side look at scores, pricing and features — with RECATOOLS' ASEAN-aware verdict for each.
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Braintrust
LLM evaluation and prompt management for production
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PromptLayer
Prompt management and observability
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Arize Phoenix
Open-source LLM evaluation and observability
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| RECATOOLS Score | 8.1 / 10 | 7.5 / 10 | 7.1 / 10 | 7.8 / 10 |
| Capability | ||||
| Value for money | ||||
| Ease of use | ||||
| ASEAN readiness | ||||
| API quality | ||||
| Pricing | Freemium | Freemium | Freemium | Open Source |
| Free tier | — | — | — | — |
| Paid from | — | — | — | — |
| Has API | ✓ | ✓ | ✓ | ✓ |
| Open source | ✓ | ✗ | ✗ | ✓ |
| Free to use | ✓ | ✓ | ✓ | ✓ |
| Users | — | — | — | — |
| Founded | — | 2023 | 2022 | 2023 |
| Maker | — | — | — | — |
| Verdict | Promptfoo built its reputation as the eval tool developers actually reach for instead of rolling their own harness — YAML configs, 50-plus provider support, and a red-teaming mode that generates jailbreak and prompt-inje... |
Braintrust is an evaluation, observability and prompt-iteration platform for teams building LLM-powered products, offering systematic evals, logging, datasets, scoring and a playground that bring engineering rigour to ot... |
PromptLayer is a focused prompt-management and observability platform that started as a logging layer for LLM calls and grew into a prompt CMS with evals and monitoring. Its strength is letting non-technical team members... |
Arize Phoenix is an open-source observability and evaluation toolkit for LLM and AI applications, offering tracing, prompt and RAG debugging, evals, and OpenTelemetry-based instrumentation that runs locally or self-hoste... |
| Full review → | Full review → | Full review → | Full review → |
Comparisons cover up to 4 tools. Scores are RECATOOLS editorial assessments; verify current pricing on each vendor's site.