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Structured side-by-side comparison for technology decisions.

Metric
hashbrown
OSSRust
Open product
syn
OSSRust
Open product
TypeOSSOSS
LanguageRustRust
Stars2,8693,293
Forks333360
Contributors100100
Open Issues10480
Health ScoreN/AN/A
Trend ScoreN/AN/A
Activity ScoreN/AN/A
Reliability ScoreN/AN/A
Security ScoreN/AN/A
Latest Versionv0.16.12.0.117
LicenseApache-2.0Apache-2.0
StatusN/AN/A
Activity LevelN/AN/A
Last Release11/20/20252/20/2026
Last Commit2/22/20262/22/2026
Key FeaturesPrimary stack: Rust (Apache-2.0) · Community adoption: 2.9K starsproc macro
ProsStrong community adoption. · Broad maintainer participation.Strong community adoption. · Broad maintainer participation.
ConsSecurity posture signals are mixed; run additional security review before broad adoptionSecurity posture signals are mixed; run additional security review before broad adoption
Pricing ModelFREEFREE