Head-to-Head

EvalGuard vs Promptfoo

Open-source eval framework, acquired by OpenAI (March 2026)

Promptfoo is a popular open-source LLM evaluation framework with 125 red team plugins, ~45 assertions, and 60+ providers. It has 10.5K GitHub stars and 300K+ developers. It was acquired by OpenAI in March 2026, raising vendor neutrality concerns.

Competitor data (GitHub stars, downloads, feature counts, funding/acquisition status) verified as of 2026-04-28.

14
EvalGuard wins
vs
0
Promptfoo wins
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FeatureEvalGuardPromptfoo
Attack Plugins249125
Eval Scorers166~45
LLM Providers8760+
Attack Strategies4327
Compliance Frameworks334
LLM Firewall5-layer Visual BuilderNo
LLM GatewayYes (routing, caching)No
Agent TracingOpenTelemetryNo
Cost AnalyticsYesNo
Prompt IDEYesNo
NL→Eval PipelineYes (unique)No
Benchmark Suites80
BYOK EncryptionYesNo
Open SourceApache 2.0MIT (10.5K★)
Vendor NeutralYes (independent)OpenAI subsidiary

Why choose EvalGuard over Promptfoo

  • 249 attack plugins vs 125 — 2x more red team coverage
  • 166 scorers vs ~45 assertions — nearly 2x evaluation depth
  • Vendor neutral — not owned by any LLM provider
  • 5-layer LLM firewall, gateway, Shadow AI, AI-SPM, Smart Copilot — Promptfoo has none
  • 33 compliance frameworks vs 4 (adds ISO 42001, India DPDP, HIPAA, GDPR, SOC 2, NIST CSF + 23 more)
  • NL→Eval pipeline — describe your app in English, get a complete eval suite

Where Promptfoo leads

  • Promptfoo has a larger community (10.5K stars, 300K+ developers)
  • Promptfoo has strong CI/CD templates and CLI-first workflow
  • Promptfoo is free and open source (MIT license)

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