postcard
v1.1.3 GrowingA no_std + serde compatible message library for Rust
Quick Verdict
- ✓Stable API (1.x for 7+ years)
- ✓Massive adoption (9.8K crates depend on it)
- ✓Permissive license (MIT OR Apache-2.0)
Security
Deep Insights
4.8M downloads in the last 30 days (161.0K/day), up 35% from the previous period.
9.8K crates depend on postcard. Strong ecosystem adoption means battle-tested code and long-term stability.
The primary maintainer publishes 114 crates. This suggests deep Rust expertise and long-term commitment to the ecosystem.
The API has been stable (1.x) for over 7 years with 40 releases. This level of maturity means you can depend on it without worrying about breaking changes.
At 43KB, postcard is lightweight. Small crate size correlates with focused, well-scoped functionality.
Notable dependents include rand, tinystr, litemap, yoke, zerovec. When high-quality crates choose postcard, it's a strong quality signal.
Health Breakdown
Recency, release consistency, active ratio
Yanked ratio, deps, size, maturity, features
Reverse deps, ownership, ecosystem
Downloads, momentum, growth trend
Docs, repo, license, metadata
Download Trend
Top Dependents
Most downloaded crates that depend on postcard
Version Adoption
Release Timeline
Feature Flags
default =["heapless-cas"]
