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 23.5K GitHub stars and 300K+ developers. It was acquired by OpenAI in March 2026, raising vendor neutrality concerns.
across the 15-row feature matrix · see “where Promptfooleads” below
Competitor data (GitHub stars, downloads, feature counts, funding / acquisition status) verified as of 2026-07-22. EvalGuard's own counts are sourced live from the drift-checked registry.
Coverage at a glance
EvalGuard vs Promptfoo, by the numbers
Where both platforms publish a number, here's the gap. Our values come straight from the drift-checked registry; Promptfoo's are quoted as published.
| Feature | EvalGuard | Promptfoo |
|---|---|---|
| Attack Plugins | 300+ | 125 |
| Eval Scorers | 200+ | ~45 |
| LLM Providers | 90+ | 60+ |
| Attack Strategies | 100+ | 27 |
| Compliance Frameworks | 50 | 4 |
| LLM Firewall | 5-layer Visual Builder | No |
| LLM Gateway | Yes (routing, caching) | No |
| Agent Tracing | OpenTelemetry | No |
| Cost Analytics | Yes | No |
| Prompt IDE | Yes | No |
| NL→Eval Pipeline | Yes (unique in this guide) | No |
| Benchmark Suites | 34 | 0 |
| BYOK Encryption | Yes | No |
| Open Source | Apache 2.0 (SDKs + CLI) | MIT (23.5K★) |
| Vendor Neutral | Yes (independent) | OpenAI subsidiary |
Why choose EvalGuard over Promptfoo
- 300+ attack plugins vs 125 — 2x more red team coverage
- 200+ 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
- 50 compliance frameworks vs 4 (adds ISO 42001, India DPDP, HIPAA, GDPR, SOC 2, NIST CSF + 44 more)
- NL→Eval pipeline — describe your app in English, get a complete eval suite
Where Promptfoo leads
- Promptfoo has a larger community (23.5K 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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