Bun Releases & EOL Dates | Version History Tracker

Q: Should I use Bun or Node.js?

Node.js is mature, battle-tested, and has universal library support. Bun is significantly faster for startup, installs, and many operations. Use Bun for new projects where speed matters and you can tolerate occasional compatibility gaps. Use Node.js when you need guaranteed compatibility with every npm package.

Q: Is Bun production-ready?

Bun 1.0 (Sep 2023) marked production readiness. It runs Express, Next.js, Hono, and many Node.js apps. However, some native addons and niche Node APIs are still unsupported. Test your specific app before deploying.

Q: How compatible is Bun with Node.js?

Bun implements most Node.js APIs: fs, path, http, crypto, child_process, streams, and more. It runs package.json scripts, supports node_modules, and passes a large portion of the Node.js test suite. Gaps remain in some edge cases of http2, worker_threads, and native addons (N-API partial).

Q: How fast is Bun compared to Node.js?

Bun starts 4x faster than Node.js, installs packages 25x faster than npm, and runs TypeScript/JSX natively without a transpilation step. HTTP server throughput is 2-3x higher in synthetic benchmarks. Real-world gains depend on your app but cold start and install speed are consistently faster.

Q: Does Bun replace npm/yarn/pnpm?

Yes. bun install is a drop-in replacement for npm install that reads package.json and generates a bun.lockb lockfile. It is 25x faster than npm and supports workspaces. You can use Bun as just a package manager even if you run your app with Node.js.

Version Timeline

All tracked releases with lifecycle status and EOL dates.

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Lifecycle Timeline

Visual overview of active support and maintenance windows.

1.0

1.1

1.2

1.3+

2023 2024 2025 2026 2027 2028

Active

Maint

Active

Maint

Active

Maint

Active

Maint

Active / LTS

Maintenance

Today

Upgrade Paths

Migration guidance between major versions — breaking changes, effort estimates, and tips.

1.0 1.1 Low Difficulty

Est. < 1 hour

Breaking Changes

Windows support added
Bun.semver and Bun.glob APIs
Improved Node.js compatibility
Better error messages

Migration Notes

Non-breaking. Run bun upgrade to update. All changes are additive.

Version Risk Assessment

Evaluate risk factors before choosing a version for production.

Version	EOL Risk	CVE Risk	Ecosystem	Cloud Support	Overall	Recommended Action
Bun < 1.0	Critical	Medium	Pre-release	None	Critical	Pre-release — upgrade immediately
Bun 1.0	Medium	Low	Stable	Growing	Medium	Update to latest 1.x
Bun 1.1+	Low	Low	Active	Growing	Low	Current — keep updated

Risk focuses on API stability, Node.js compat gaps, and production readiness. Assessed as of March 2026.

Bun Version Feature Comparison

Side-by-side feature differences across major versions.

Feature	1.0	1.1	1.2
Node.js API compat	~90%	~93%	~95%
Windows support	No	Stable	Stable
TypeScript	Native	Native	Native
JSX	Native	Native	Native
Package manager	Stable	Stable	Stable
Bundler	Stable	Stable	Enhanced
Test runner	Stable	Enhanced	Enhanced
SQLite built-in	Stable	Stable	Stable
S3 client built-in	No	No	Stable
Worker threads	Partial	Improved	Improved

Embed Badges

Add live Bun status badges to your README, docs, or dashboard.

Health Status

Overall support health

![Bun Health Status](https://img.releaserun.com/badge/health/bun.svg)

EOL Countdown

Next end-of-life date

![Bun EOL Countdown](https://img.releaserun.com/badge/eol/bun.svg)

Latest Version

Current stable release

![Bun Latest Version](https://img.releaserun.com/badge/v/bun.svg)

CVE Status

Known vulnerabilities

![Bun CVE Status](https://img.releaserun.com/badge/cve/bun.svg)

Frequently Asked Questions

Common questions about Bun releases and lifecycle.

Should I use Bun or Node.js?

Node.js is mature, battle-tested, and has universal library support. Bun is significantly faster for startup, installs, and many operations. Use Bun for new projects where speed matters and you can tolerate occasional compatibility gaps. Use Node.js when you need guaranteed compatibility with every npm package.

Is Bun production-ready?

Bun 1.0 (Sep 2023) marked production readiness. It runs Express, Next.js, Hono, and many Node.js apps. However, some native addons and niche Node APIs are still unsupported. Test your specific app before deploying.

How compatible is Bun with Node.js?

Bun implements most Node.js APIs: fs, path, http, crypto, child_process, streams, and more. It runs package.json scripts, supports node_modules, and passes a large portion of the Node.js test suite. Gaps remain in some edge cases of http2, worker_threads, and native addons (N-API partial).

How fast is Bun compared to Node.js?

Bun starts 4x faster than Node.js, installs packages 25x faster than npm, and runs TypeScript/JSX natively without a transpilation step. HTTP server throughput is 2-3x higher in synthetic benchmarks. Real-world gains depend on your app but cold start and install speed are consistently faster.

Does Bun replace npm/yarn/pnpm?

Yes. bun install is a drop-in replacement for npm install that reads package.json and generates a bun.lockb lockfile. It is 25x faster than npm and supports workspaces. You can use Bun as just a package manager even if you run your app with Node.js.

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