Crates / Compare / core-foundation vs objc2
Rust crates side by side · data Oct 24, 2026
core-foundation vs objc2
Short answerBy steady daily use, core-foundation is bigger: 1,508,076 real downloads a day against 607,001 for objc2 (2.5x). 523 crates depend on core-foundation and 1,193 on objc2. core-foundation last shipped 17 months ago, objc2 19 days ago.
core-foundation
EstablishedEstablished and steady.
523 crates depend on it; no release in the last 90 days, so its count is all steady use.
Bindings to Core Foundation for macOS
objc2
Widely usedWidely used and gaining.
1,193 crates depend on it; downloads jump on release days (1.3x the baseline).
Objective-C interface and runtime bindings
core-foundationobjc2 · 100% = that crate's normal quiet day, so a spike to 300% is triple its usual traffic
Every number, side by side
| Same window, same method | core-foundation | objc2 |
|---|---|---|
| Real downloads a day | 1,508,076 | 607,001 |
| Crates that depend on it | 523 | 1,193 |
| Last release | 0.10.1, 17 months ago | 0.6.5, 19 days ago |
| Trend vs the field | -2% | +10% |
| Release-window share | 0.0% | 2.9% |
| Downloads in the window | 138,249,919 | 55,683,245 |
| All-time downloads | 510,413,744 | 141,909,502 |
| Versions published | 32 | 29 |
| License | MIT OR Apache-2.0 | MIT |
| MSRV | 1.65 | 1.71 |
| First published | Feb 12, 2015 | Nov 19, 2021 |
Which to pick
- Downloads tell you what is common, not what fits. Each crate's own description above says what it is for; when the jobs differ, pick by the job.
- When both fit, prefer the one more crates depend on (objc2, 1,193 dependents): more eyes, more answered questions, and you may already have it in your tree.
- Check the release dates against your own pace: core-foundation 17 months ago, objc2 19 days ago.
Also in this space
Method
Real downloads = the median day with no release that day or the day before, from the crates.io API (Jul 27, 2026 to Oct 23, 2026). Raw crates.io counts include CI and bots and run high (why); the method is from our 90-day study.
Up next
Another comparison: Same method, same window. Foundational and steady vs widely used and steady.reqwest vs ureqRead it next →Also worth your time