Compare Products

Structured side-by-side comparison for technology decisions.

Metric
once_cell
OSSRust
Open product
syn
OSSRust
Open product
TypeOSSOSS
LanguageRustRust
Stars2,0643,293
Forks122360
Contributors55100
Open Issues780
Health ScoreN/AN/A
Trend ScoreN/AN/A
Activity ScoreN/AN/A
Reliability ScoreN/AN/A
Security ScoreN/AN/A
Latest Versionv1.21.32.0.117
LicenseApache-2.0Apache-2.0
StatusN/AN/A
Activity LevelN/AN/A
Last ReleaseN/A2/20/2026
Last Commit5/24/20252/22/2026
Key Featureslazy evaluation · rustproc macro
ProsStrong community adoption. · Broad maintainer participation.Strong community adoption. · Broad maintainer participation.
ConsMaintenance activity appears slow.Security posture signals are mixed; run additional security review before broad adoption
Pricing ModelFREEFREE