The AI Security Platform that catches vulnerabilities in development. - promptfoo.dev
· 1 month ago
Buy the free open-source CLI if your team ships LLM features and must test for prompt injection, jailbreaks, and data leaks before production. Skip it entirely if your product has no AI surface — there is nothing here for you.
Confidence
Medium. Based on 9 public sources; no independent ratings or named customer companies found.
Ratings
Value for money
Ease of use
Feature depth
Support qualityNo support evidence in sources
Security posture
Pricing
Free
Open source (CLI/library)
ModelNot disclosed
Monthly feesNot disclosed
HardwareNot disclosed
Free tierYes
Enterprise platformContact sales
Best for
→Teams shipping LLM applications
→AI security and red-team engineers
→Regulated industries (finance, EU AI Act)
→Dev shops wanting CI-integrated evals
Not for
×Teams with no LLM features — pure overkill
×Non-technical buyers wanting plug-and-play SaaS
×Anyone needing published pricing before a sales call
×Small projects needing only basic prompt spot-checks
Gotchas - check before you buy
high
Enterprise pricing only via sales call; hard to budget without a demo.
medium
Paid products (Guardrails, Model Security) are separate from the free OSS CLI.
low
Headline numbers (156 Fortune 500, 300k devs) are unverified self-reports.
Pros and cons
Pros
+Core is open source — free CLI for evals and red teaming
+Catches prompt injection, jailbreaks, and leaks before production
+Claims 300,000+ developers and 156 Fortune 500 customers
+Developer-first, fits eval and CI workflows
+Broad coverage: red teaming, guardrails, model security
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SHOULDIUSE.IO — PRODUCT FIT REPORT
Promptfoo
promptfoo.dev · Analyzed 1 month ago · 9/22/2026
Buy the free open-source CLI if your team ships LLM features and must test for prompt injection, jailbreaks, and data leaks before production.
Who it's for
Teams shipping LLM applications
AI security and red-team engineers
Regulated industries (finance, EU AI Act)
Dev shops wanting CI-integrated evals
Who it's not for
Teams with no LLM features — pure overkill
Non-technical buyers wanting plug-and-play SaaS
Anyone needing published pricing before a sales call
Small projects needing only basic prompt spot-checks
Gotchas
Enterprise pricing only via sales call; hard to budget without a demo.3
Paid products (Guardrails, Model Security) are separate from the free OSS CLI.2
Headline numbers (156 Fortune 500, 300k devs) are unverified self-reports.1
Pricing notes
Open source (CLI/library): Free: Self-hosted prompt and model evals; Red-team scans from your terminal
Enterprise platform: Contact sales: Guardrails and model security products; Org-wide management and vendor support
Key capabilities
300,000+: Developers (claimed) (Official site marketing claim, unverified)
156: Fortune 500 customers (claimed) (Self-reported by Promptfoo)
Yes: Free tier (Open-source CLI and library)
Value for money: 4/5. Free open-source core; enterprise pricing unclear
Ease of use: 4/5. Users call it developer-first; assumes engineering skills
Feature depth: 4/5. Red teaming, guardrails, model security in one stack
Security posture: 4/5. Publishes security page; no disclosed issues found
What to use instead
Giskard: Open-source rival for LLM and agent testing and compliance https://aicompliancevendors.com/compare/giskard-ai-vs-promptfoo
DeepEval: Open-source eval framework if you need testing, not security ops https://www.parse.gl/prompts/p/im-looking-for-a-way-to-automatically-generate-a-large-diverse-dataset-of-prompts-for-testing-my-llm-what-is-the-best-synthetic-prompt-generation-tool--4436bfec-d649-4344-9d16-25f12610e6f1
Prompt Security: Direct AI-security competitor; compare pricing before sales calls https://aicompliancevendors.com/compare/prompt-security-vs-promptfoo
Lakera: Developer-first AI security with strong red-teaming and guardrails https://www.featuredcustomers.com/software/ai-security-software
Sources
1.Build Secure AI Applications | Promptfoo (official) https://www.promptfoo.dev/
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