| Apache Kafka | Apache Pulsar | |
|---|---|---|
| License | Apache-2.0 | Apache-2.0 |
| Latest version | — | — |
| GitHub stars | 33,125 | 15,290 |
| GitHub forks | 15,327 | 3,745 |
| Open issues | 436 | 1,693 |
| Releases (90d) | 0 | 8 |
| npm downloads (week) | — | — |
Sources: official APIs (GitHub, npm, PyPI, crates.io). Capture dates shown on each tool page. Missing value = the source does not publish it ("—", never estimated).