Promptfoo alternatives
Promptfoo is open-source CLI and platform for red teaming, scanning and evaluating LLM apps and agents. If it is not the right fit on price, features or setup, these 10 tools do a similar job. We rank them by how closely they match Promptfoo, and every listing is checked against its official site.
Compare Promptfoo and its alternatives
| Tool | Best for | Pricing | Starts at | MCP server |
|---|---|---|---|---|
| Promptfoocurrent | Developer and security teams red teaming LLM apps in CI | Open source | Free open-source Community plan with 10k red team probes/month, Enterprise and On-Premise priced on request (as of October 2026) | Not checked |
| HiddenLayer | Security teams protecting AI models and agents across their lifecycle | Enterprise | See site | Not checked |
| Lakera | Security teams protecting LLM apps and agents at runtime | Enterprise | See site | Not checked |
| Arize AI | Teams monitoring and evaluating LLM agents in production | Free plan | Free AX plan, AX Pro $50/month, Enterprise custom (as of October 2026) | Not checked |
| Lasso Security | Enterprises controlling employee and agent use of GenAI | Enterprise | See site | Not checked |
| Mindgard | Security teams running continuous red teaming on AI systems | Enterprise | See site | Not checked |
| Langfuse | Engineering teams tracing and evaluating LLM apps | Open source | Free Hobby cloud plan and free self-hosting, Core from $29/month, Pro $199/month (as of October 2026) | Official |
| Braintrust | AI product teams running evals on agents in production | Free plan | Free Starter plan, Pro $249/month, Enterprise custom (as of October 2026) | Official |
| Holistic AI | Compliance teams preparing for the EU AI Act | Enterprise | See site | Not checked |
| NeMo Guardrails | Engineering teams that want self-hosted, code-level control over LLM guardrails | Open source | See site | Not checked |
| Amazon Bedrock Guardrails | Teams building AI apps on AWS that need central safety policies | Paid | See site | Not checked |
The alternatives
1. HiddenLayer
AI security platform for discovery, model supply chain scanning, attack simulation and runtime defense.
Pricing: Enterprise · Best for: security teams protecting AI models and agents across their lifecycle · Also covers: ai safety, llm security, red teaming
2. Lakera
AI security for agents and workforce AI use, with runtime guardrails and red teaming.
Pricing: Enterprise · Best for: security teams protecting LLM apps and agents at runtime · Also covers: ai safety, llm security, guardrails
3. Arize AI
Agent observability and evaluation platform, with the open-source Phoenix for tracing and evals.
Pricing: Free plan, from Free AX plan, AX Pro $50/month, Enterprise custom (as of October 2026) · Best for: teams monitoring and evaluating LLM agents in production · Also covers: ai safety, evaluation
4. Lasso Security
Security platform for enterprise AI models, agents and apps, from discovery to runtime enforcement.
Pricing: Enterprise · Best for: enterprises controlling employee and agent use of GenAI · Also covers: ai safety, llm security, red teaming
5. Mindgard
AI security platform for discovering, assessing and red teaming AI models, agents and apps.
Pricing: Enterprise · Best for: security teams running continuous red teaming on AI systems · Also covers: ai safety, red teaming, llm security
6. Langfuse
Open-source LLM engineering platform for tracing, prompt management and evaluations.
Pricing: Open source, from Free Hobby cloud plan and free self-hosting, Core from $29/month, Pro $199/month (as of October 2026) · Best for: engineering teams tracing and evaluating LLM apps · Also covers: ai safety, evaluation
7. Braintrust
AI observability and evals platform for tracing agents, running experiments and scoring outputs.
Pricing: Free plan, from Free Starter plan, Pro $249/month, Enterprise custom (as of October 2026) · Best for: aI product teams running evals on agents in production · Also covers: ai safety, evaluation
8. Holistic AI
AI governance platform that inventories AI, tests risks and enforces controls for regulatory compliance.
Pricing: Enterprise · Best for: compliance teams preparing for the EU AI Act · Also covers: ai safety, red teaming
9. NeMo Guardrails
NVIDIA's open-source toolkit for adding programmable input, dialog, retrieval and output rails to LLM apps.
Pricing: Open source · Best for: engineering teams that want self-hosted, code-level control over LLM guardrails
10. Amazon Bedrock Guardrails
Configurable safety filters for generative AI apps on AWS, usable with any model via the ApplyGuardrail API.
Pricing: Paid · Best for: teams building AI apps on AWS that need central safety policies · Also covers: ai safety
Frequently asked questions
What is the best alternative to Promptfoo?+
HiddenLayer, Lakera and Arize AI are the closest matches in our directory. HiddenLayer: AI security platform for discovery, model supply chain scanning, attack simulation and runtime defense.
Is there a free alternative to Promptfoo?+
Arize AI, Langfuse, Braintrust and NeMo Guardrails have a free plan or are open source. Free plans usually cap usage or features.
Is there an open-source alternative to Promptfoo?+
Yes: Langfuse and NeMo Guardrails.
What is Promptfoo?+
Open-source CLI and platform for red teaming, scanning and evaluating LLM apps and agents.
More alternatives