compare
Bun vs Vitest
The same facts for both, read from GitHub every night, and the relation a person reviewed.
| Fact | Bun | Vitest |
|---|---|---|
| Language | Rust | TypeScript |
| Licence | Other | MIT |
| Stars | 96k | 17k |
| Latest | bun-v1.4.2 | v5.0.3 |
| Last push | 2026-10-06 | 2026-10-06 |
| Release cadence | about 19 days between releases | about 10 days between releases |
| Active contributors | 8+ commit authors on the default branch in the last 90 days | 77 commit authors on the default branch in the last 90 days |
| Flags | none | none |
How they relate
Both replace Jest. Alternatives to Jest →
PartialBunbun test runs Jest-style tests with most of its matchers.
Full replacementVitestJest-compatible API, running on Vite's transform pipeline.
Bun
- bun-v1.4.22026-09-05Bun v1.4.2
- bun-v1.4.12026-09-04Bun v1.4.1
- bun-v1.4.02026-08-20Bun v1.4
- bun-v1.3.142026-05-13Bun v1.3.14
- bun-v1.3.132026-04-20Bun v1.3.13
Vitest
- v5.0.32026-09-30Isolate result.status between repeats runs - by @hi-ogawa, Hiroshi Ogawa and Codex (GPT-6) in <samp>(5dbeb)…
- v5.0.22026-09-25Bind process in case global is overwritten - by @AriPerkkio in <samp>(0b792)</samp>
- v5.0.12026-09-15ui:
- v5.0.02026-09-03Vitest 5 is officially out! This release focuses on performance and brings a lot of new features while fixing long-stan…
- v5.0.0-rc.42026-08-31Parse files statically in vitest list by default - by @sheremet-va in <samp>(51e94)</samp>pre-release
Bun
unsigned The latest release, bun-v1.4.2, carries no signature GitHub could verify.
Loading the security report
Vitest
✓ signed The latest release, v5.0.3, carries a signature GitHub verified.
Loading the security report