Bun
Depends
Confidence: Medium
Try Bun for new JS/TS projects, scripts, and tooling . it is free, fast, and npm-compatible.
Comparison
Bun vs esbuild - An extremely fast bundler for the web
Bun lands on Depends, and esbuild - An extremely fast bundler for the web lands on Worth it.
esbuild - An extremely fast bundler for the web
Worth it
Confidence: Low
If you build JavaScript apps, this free bundler is a low-risk adopt . though evidence is thin, so confidence is low.
| Compare | Bun | esbuild - An extremely fast bundler for the web |
|---|---|---|
| Verdict | Depends | Worth it |
| Best for | New JS/TS projects wanting one fast toolchain | JS/TypeScript developers |
| Who it's not for | Production-critical apps that cannot absorb runtime churn | Non-developers . you will never touch this |
| Privacy | Two recent CVEs (command injection, trusted-dependencies spoofing) plus active malware campaigns abusing the runtime. | No known public vulnerabilities found in the sources reviewed. |
| Support quality | Post-acquisition support called limited and deprecated | No support evidence found |
| Public sentiment | Users praise Bun's speed and resource efficiency, but the 1.4 Rust rewrite and post-acquisition support draw criticism.¹ | Sources contain no verbatim user reviews . only academic citations and tool-comparison listings. |
| Biggest gotcha | Acquired December 2025 with zero revenue; priorities may shift toward Anthropic's goals.⁶ | No security page; vet GitHub advisories yourself before adopting |
Pick Bun when
- New JS/TS projects wanting one fast toolchain
- Solo devs replacing multi-tool setups
- Scripts and data-processing workloads
- npm users seeking faster installs
When Bun is not a fit
- Production-critical apps that cannot absorb runtime churn
- Teams needing committed long-term vendor support
- Regulated shops wary of fresh toolchain CVEs
- Guess: heavy users of Node-native addons and edge cases
Pick esbuild - An extremely fast bundler for the web when
- JS/TypeScript developers
- Rails apps bundling Stimulus
- Large codebases with slow builds
- Teams replacing sluggish build tools
When esbuild - An extremely fast bundler for the web is not a fit
- Non-developers . you will never touch this
- Teams wanting batteries-included frameworks like Vite or Next
- Projects depending on webpack's massive plugin ecosystem
- Buyers needing paid support or SLAs
Sources
review
- Hacker News . Bun team AMAnews.ycombinator.comreview
- Hacker News . Bun 1.4 Rust rewrite is not looking good?news.ycombinator.comreview
- Hacker News . Bun support is now limited and deprecatednews.ycombinator.comnews
- The Pragmatic Engineer . Bun's Rust rewriteblog.pragmaticengineer.comnews
official
news
- Wikipedia . Bun (software)en.wikipedia.orgnews
- GitHub . oven-sh/bungithub.comofficial
- SentinelOne . CVE-2026-24910sentinelone.comsecurity
- GitHub Advisory . CVE-2025-8022github.comsecurity
- charpeni . The Bun CVE Gapcharpeni.comsecurity
- Endor Labs . Why npm malware keeps reaching for Bunendorlabs.comsecurity
security
- bun.sh/securitybun.shofficial
- Toolradar . Bun pricingtoolradar.comreview