promptfoo vs zstd — Trust Score Comparison

Name: promptfoo vs zstd Trust Comparison
Creator: Nerq

Side-by-side trust comparison of promptfoo and zstd. Scores based on security, compliance, maintenance, popularity, and ecosystem signals.

promptfoo scores 39.0/100 (D) while zstd scores 64.5/100 (C+) on the Nerq Trust Score. zstd leads by 25.5 points. promptfoo is a security tool with 0 stars. zstd is a uncategorized tool with 0 stars.

promptfoo

39.0

Categorysecurity

Stars0

Sourcenpm

Security0

Compliance97

Maintenance0

Documentation1

zstd

64.5

C+

Categoryuncategorized

Stars0

Sourcehomebrew

Security90

Maintenance50

Documentation65

Detailed Metric Comparison

Metric	promptfoo	zstd
Trust Score	39.0/100	64.5/100
Grade	D	C+
Stars	0	0
Category	security	uncategorized
Security	0	90
Compliance	97	N/A
Maintenance	0	50
Documentation	1	65
EU AI Act Risk	minimal	N/A
Verified	No	No

Verdict

zstd leads with a trust score of 64.5/100 compared to promptfoo's 39.0/100 (a 25.5-point difference). zstd scores higher on security (90 vs 0), maintenance (50 vs 0). Both agents should be evaluated based on your specific requirements.

Detailed Analysis

Security

zstd leads on security with a score of 90/100 compared to promptfoo's 0/100. This score reflects dependency vulnerability analysis, known CVE exposure, and security best practices. A higher security score means fewer known vulnerabilities and better security hygiene in the codebase.

Maintenance & Activity

zstd demonstrates stronger maintenance activity (50/100 vs 0/100). This metric captures commit frequency, issue response times, and release cadence. Actively maintained tools receive faster security patches and are less likely to accumulate technical debt.

Documentation

zstd has better documentation (65/100 vs 1/100). Good documentation reduces onboarding time and helps teams adopt the tool safely. This score evaluates README completeness, API documentation, code examples, and tutorial availability.

Community & Adoption

promptfoo has 0 GitHub stars while zstd has 0. Both tools have comparable community sizes, suggesting similar levels of ecosystem support and third-party resources.

When to Choose Each Tool

Choose promptfoo if you need:

Consider if it better fits your specific use case

Choose zstd if you need:

Higher overall trust score — more reliable for production use
Stronger security profile with fewer known vulnerabilities
More actively maintained with faster release cadence
Better documentation for faster onboarding

Switching from promptfoo to zstd (or vice versa)

When migrating between promptfoo and zstd, consider these factors:

API Compatibility: promptfoo (security) and zstd (uncategorized) serve different categories, so migration may require significant refactoring.
Security Review: Run a security audit after migration. Check the promptfoo safety report and zstd safety report for known issues.
Testing: Ensure your test suite covers all integration points before switching in production.
Community Support: promptfoo has 0 stars and zstd has 0. Larger communities typically mean better Stack Overflow answers and migration guides.

promptfoo Safety Report zstd Safety Report promptfoo Alternatives zstd Alternatives

Frequently Asked Questions

Which is safer, promptfoo or zstd?

Based on Nerq's independent trust assessment, promptfoo has a trust score of 39.0/100 (D) while zstd scores 64.5/100 (C+). The 25.5-point difference suggests zstd has a stronger trust profile. Trust scores are based on security, compliance, maintenance, documentation, and community adoption.

How do promptfoo and zstd compare on security?

promptfoo has a security score of 0/100 and zstd scores 90/100. There is a notable difference in their security assessments. promptfoo's compliance score is 97/100 (EU risk: minimal), while zstd's is N/A/100 (EU risk: N/A).

Should I use promptfoo or zstd?

The choice depends on your requirements. promptfoo (security, 0 stars) and zstd (uncategorized, 0 stars) serve different use cases. On trust, promptfoo scores 39.0/100 and zstd scores 64.5/100. Review the full KYA reports for each agent before making a decision. Consider factors like integration requirements, documentation quality (1 vs 65), and maintenance activity (0 vs 50).

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Last updated: 2026-10-31 | Data refreshed weekly
Disclaimer: Nerq trust scores are automated assessments based on publicly available signals. They are not endorsements or guarantees. Always conduct your own due diligence.