Promptfoo

Promptfoo is best for engineering and security teams that need open-source, repeatable LLM evaluation, red-teaming, and regression testing in local development or CI, with a free Community tier and quote-based Enterprise or On-Premise options for teams that need shared dashboards, SSO, SLAs, managed cloud, or customer-controlled deployment. Public Promptfoo documentation describes the core product as an open-source CLI and library for evaluating and red-teaming LLM apps, and the website expands that positioning across evaluations, red teaming, guardrails, model security, MCP Proxy, and code scanning. That source context matters because Promptfoo is not just a hosted evaluation dashboard: it can run locally, fit into CI workflows, compare prompts and providers, test RAG behavior, apply assertions, and help teams catch regressions before release. The Community plan is listed as Free Forever at $0/month and includes all LLM evaluation features, all model providers and integrations, custom integration with your own app, local or self-hosted operation, vulnerability scanning, community support, and red teaming up to 10k probes per month. Enterprise and On-Premise are both public Custom plans rather than self-serve paid tiers. Promptfoo does not publish exact Enterprise or On-Premise monthly prices, annual prices, billing periods, conversion thresholds from Community, paid seat limits, standard usage caps, data-retention terms, or minimum contract lengths in the provided pricing content. The clearest public conversion path is therefore usage and procurement driven: teams can start on Community, then contact sales when they need Enterprise capabilities such as team sharing, continuous monitoring, centralized security and compliance dashboards, configurable attack profiles, SSO, granular permissions, Promptfoo API access, managed cloud deployment, professional services, priority support, or SLA guarantees. On-Premise is the higher-control custom option for deployment on customer infrastructure, complete data isolation, a dedicated runner, an assigned deployment engineer, and enterprise security and deployment support. For buyers, the practical pricing takeaway is simple: Promptfoo is transparent and generous at the free tier, but paid planning requires a sales conversation because final Enterprise and On-Premise cost, billing frequency, limits, and contractual obligations are not publicly specified. The tool is strongest when a team wants evaluation definitions and security tests to live close to engineering workflows, especially for prompt changes, model comparisons, RAG pipelines, agent behavior, MCP-related security boundaries, and release gates in CI/CD. It is less ideal as a purely nontechnical prompt management workspace or as a replacement for full production observability, because its public materials emphasize repeatable evaluation, red-team testing, vulnerability scanning, guardrails, MCP Proxy security, and development-time checks more than trace-first monitoring.