Promptfoo vs Braintrust
Agent-native side-by-side. Scores are curated estimates on a 0–10 scale. Lock-in: higher = worse. Prefer JTBD picks via /api/decide when choosing for a job.
| Dimension | Promptfoo | Braintrust |
|---|---|---|
| Overall | 8.4 | 8.2 |
| Capability fit | 8.2 | 9.2 |
| Price / performance | 9.2 | 7.5 |
| Latency / reliability | 7.8 | 8.6 |
| Developer & agent DX | 8.8 | 8.8 |
| Privacy / data retention | 9.0 | 8.0 |
| Lock-in risk (higher = worse) | 2.5 | 5.0 |
| Maturity / track record | 8.0 | 8.2 |
| Pricing | As of 2026-10-24 (promptfoo.dev/pricing, fetched 2026-10-24): Community 'Free Forever' ('Our open-source tool, perfect for individual developers and small teams.') with 'Red teaming (10k probes/month)' and 'Run locally o… | Eval-first platform; data-based pricing with unlimited seats on many plans; strong CI eval story. |
| Tagline | Default OSS eval harness. Braintrust when you want hosted collaboration; Promptfoo when you want local/CI… | Depot pick when evals are the product quality gate. Pair with Helicone/Langfuse for cheap request logs if… |
Promptfoo
Default OSS eval harness. Braintrust when you want hosted collaboration; Promptfoo when you want local/CI control. Strengths: OSS + CI-native; Red teaming built-in; Multi-provider comparisons.
Strengths
- OSS + CI-native
- Red teaming built-in
- Multi-provider comparisons
Weaknesses
- Less polished product UI than Braintrust
- Enterprise features gated
- You bring judge costs
Braintrust
Depot pick when evals are the product quality gate. Pair with Helicone/Langfuse for cheap request logs if needed. Strengths: Best-in-class eval workflows; Great for prompt/agent regression gates; Generous seat model.
Strengths
- Best-in-class eval workflows
- Great for prompt/agent regression gates
- Generous seat model
Weaknesses
- Broader tracing competitors exist
- Price entry higher than hobby tools
- Learning curve for eval design
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