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2026 Guide

Best Promptfoo Alternatives · 2026. 

OpenAI announced its acquisition of Promptfoo on 2026-03-09; Promptfoo says the project remains open source and MIT licensed. If you would rather your eval and security tooling were not owned by an LLM vendor, here are the alternatives.

SOC 2 evidence engineISO 42001 mappedEU AI ActGDPR
Why switch

Why teams are switching from Promptfoo

Promptfoo was acquired by OpenAI (announced 2026-03-09). They say it stays open source and MIT; if an LLM vendor owning your eval tool is a procurement problem, that is the question to weigh
300+ attack plugins vs 155 — 2.2x more red team coverage
200+ eval scorers vs 65 assertion types — 3.7x more evaluation depth
LLM Gateway + Shadow AI + AI-SPM + Smart Copilot — Promptfoo ships none of these, and its guardrails are Enterprise-tier only
50 compliance frameworks vs their 9 (we add India DPDP, HIPAA, SOC 2, NIST CSF + 41 more)
NL→Eval Pipeline — describe your app in English, get an eval suite instantly. We haven't found this on any other tool in this guide
FinOps spend analytics with budgets, and a prompt IDE with versioning and deploys — Promptfoo shows per-eval cost totals and ships an eval-creator UI
BYOK encryption + 715+ API endpoints + self-hosted Docker/Helm
Ranked

Top Promptfoo Alternatives

1

EvalGuard

Best Alternative

300+ attack plugins, 200+ scorers, 90+ providers, compliance dashboard, LLM firewall. Full SaaS + self-hosted. SDKs and CLI are Apache 2.0.

Best for:Teams that need eval + security + compliance in one platform
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2

DeepEval

Python-native eval with 50 metrics and 50+ vulnerability types (DeepTeam). ~17.5K stars, Apache-2.0. Confident AI from $200/mo.

Best for:Python-only teams wanting pytest integration and growing red team featuresLimitations:Python-first, 50+ vulnerability types (vs 300+), no LLM gateway
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3

Langfuse

Best-in-class LLM tracing and observability (YC W23). 100+ providers via LiteLLM. No red teaming or built-in eval.

Best for:Teams focused purely on LLM observability and tracingLimitations:Zero attack plugins, no built-in eval scorers, no compliance
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4

Giskard

EU-focused AI red teaming. The 3.0 rewrite registers 7 vulnerability generators and ~19 checks, with dynamic multi-turn agents. Offers enterprise compliance certifications.

Best for:EU enterprises needing adaptive red teaming with enterprise compliance certificationsLimitations:7 vulnerability generators, ~19 checks, no firewall or gateway
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5

Braintrust

Eval platform with polished UX. Control plane closed; AI Proxy and autoevals are MIT. No attack plugins.

Best for:Teams wanting simple eval-only workflowsLimitations:Control plane closed (AI Proxy + autoevals MIT), no security testing, self-hosting is data-plane only
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6

Garak (NVIDIA)

NVIDIA's open-source LLM vulnerability scanner. CLI only, 190 probes with 117 detectors.

Best for:Security researchers wanting CLI-based probingLimitations:CLI only, no dashboard, no general-purpose scorer library
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7

MLflow

Databricks' open-source ML lifecycle platform with LLM eval (24 built-in GenAI scorers + judges).

Best for:Teams already invested in Databricks ecosystemLimitations:24 built-in scorers, no security testing, SaaS requires Databricks
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8

OpenAI Evals

OpenAI's built-in evaluation. Free but locked to OpenAI models only.

Best for:Teams using only OpenAI modelsLimitations:OpenAI only, no red teaming, vendor locked
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See full EvalGuard vs Promptfoo comparison

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