PromptBrake vs Promptfoo
Detailed side-by-side comparison to help you choose the right tool
PromptBrake
AI Security
PromptBrake is a paid AI security testing platform for live LLM endpoints, AI APIs, and chatbots. It runs repeatable adversarial scans for prompt injection, data leakage, unsafe tool behavior, output-control bypasses, memory exposure, retrieval injection, and launch-readiness failures, then reports PASS, WARN, and FAIL findings with evidence and remediation guidance.
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CustomPromptfoo
🔴DeveloperLLM Evaluation & Testing
Open-source LLM evaluation and red-teaming framework for testing prompts, models, and agents locally or in CI.
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FreeFeature Comparison
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💡 Our Take
Choose PromptBrake if your team wants security-specific endpoint testing for prompt injection, data exposure, tool abuse, output controls, and release-blocking chatbot behavior. Choose promptfoo if you primarily need flexible prompt and model evaluation workflows and are comfortable building more of the security test logic yourself.
PromptBrake - Pros & Cons
Pros
- ✓Tests the real application endpoint instead of only evaluating a standalone prompt, so results reflect prompts, tools, retrieval, auth path, and response handling together
- ✓Covers 13 checks and 60+ failure patterns, including prompt injection, context leaks, tool misuse, schema escape, memory exposure, retrieval injection, and chatbot launch checks
- ✓Reports PASS, WARN, and FAIL outcomes with the strongest triggering prompt, endpoint response evidence, remediation guidance, and a targeted re-test path
- ✓Pro Trial at $99/month includes workflow-oriented capabilities such as reports, compare view, baseline diff, and CI-ready release-gate preview
- ✓Enterprise Trial includes 3 hosted app scans plus 14 private runner scans, with the private runner trial lasting 14 days
- ✓Enterprise Docker runner can run on a customer machine, VM, or CI worker while keeping prompts, credentials, and scan results local
Cons
- ✗Requires a working live, dev, or staging API endpoint because PromptBrake tests behavior by sending adversarial prompts to the endpoint
- ✗Scout Trial is positioned as a lower-volume first pass and does not include the fuller release workflow described for Pro
- ✗Enterprise private runner pricing starts at $499/month after the trial, which may be high for small teams that only need occasional hosted scans
- ✗The product focuses on AI behavior security and does not replace application penetration testing, infrastructure review, authentication review, or authorization testing
- ✗A PASS result is point-in-time evidence for the tested endpoint and test suite, not a permanent guarantee against future model, retrieval, prompt, or tool regressions
Promptfoo - Pros & Cons
Pros
- ✓Apache 2.0 local runner with CI-friendly configuration
- ✓Broad provider and assertion coverage
- ✓Evaluation and OWASP-oriented red teaming in one workflow
Cons
- ✗Good test datasets still require substantial human judgment
- ✗LLM-as-judge assertions add cost and evaluator bias
- ✗Hosted Team and Enterprise pricing is not publicly verified here
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