Source: https://seerepo.com/compare/denoland/deno/vs/openai/codex
Markdown source: https://seerepo.com/compare/denoland/deno/vs/openai/codex.md
Description: deno and codex share 11 technologies: SQLite, Tokio, tower, crossterm, hmac, keyring, image, zip, log, tracing, and tracing-subscriber. Both are written in Rust.

# deno vs codex

deno and codex share 11 technologies: SQLite, Tokio, tower, crossterm, hmac, keyring, image, zip, log, tracing, and tracing-subscriber. Both are written in Rust.

- [denoland/deno](https://seerepo.com/r/denoland/deno): A modern runtime for JavaScript and TypeScript.
- [openai/codex](https://seerepo.com/r/openai/codex): Lightweight coding agent that runs in your terminal

## What they share and what sets them apart

- In common: SQLite, Tokio, tower, crossterm, hmac, keyring, image, zip, log, tracing, tracing-subscriber
- Only in deno: React, rusqlite, wgpu, ed25519-dalek, argon2, hkdf, plist, opentelemetry, tracing-opentelemetry, env_logger
- Only in codex: axum, lru, Sentry, objc2-app-kit, objc2-foundation, Ratatui, rmcp, png, pulldown-cmark, schemars, Pydantic, tracing-appender

## Side by side

| | deno | codex |
|---|---|---|
| Size | 1,217,015 lines written, 1,355 code files | 2,320,674 lines written, 4,216 code files |
| Who writes it | 2.4% of its commits signed by AI. With Claude Code, GitHub Copilot, Cursor, and Codex | 2.8% of its commits signed by AI. With Codex, Claude Code, and GitHub Copilot |
| Activity | Last push October 29, 2026, 17,392 commits, 108,801 stars | Last push November 4, 2026, 13,099 commits, 133,103 stars |
| Tests | 4,394 test files. 6.1% of its code files have a test that imports them | 2,448 test files. 51.6% of its code files have a test that imports them |

- Size: Lines written by people and agents, without generated ones; code files, without tests.
- Who writes it: A commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
- Activity: From GitHub and its history, on the day SeeRepo read it.
- Tests: The files that test the code, and the share of code files a test imports.

## Frequently asked questions

### Which is bigger, deno or codex?

codex, with 2,320,674 lines written; deno has 1,217,015.

The proof: [openai/codex's code at commit 021fccb](https://github.com/openai/codex/tree/021fccb046508938c4754982efccfb51d6e8356e)

### Which has more GitHub stars, deno or codex?

codex, with 133,103 stars; deno has 108,801.

The proof: [openai/codex on GitHub](https://github.com/openai/codex)

### Which has more tests, deno or codex?

deno, with 4,394 test files; codex has 2,448.

The proof: [denoland/deno's code at commit e7b39eb](https://github.com/denoland/deno/tree/e7b39ebd55c85aaf6a29290c1f5a99e2e21e09dd)

### Which was updated more recently, deno or codex?

codex: its last push was on November 4, 2026, and deno's on October 29, 2026.

The proof: [openai/codex's commits on GitHub](https://github.com/openai/codex/commits)

### Which has more commits signed by AI, deno or codex?

codex: an AI signed 2.8% of its commits, with Codex, Claude Code, and GitHub Copilot; in deno, 2.4%.

The proof: [the commits each tool signed in openai/codex](https://seerepo.com/r/openai/codex/ai)

## Sources

- denoland/deno: Read on November 4, 2026, at commit e7b39eb (https://github.com/denoland/deno/tree/e7b39ebd55c85aaf6a29290c1f5a99e2e21e09dd)
- openai/codex: Read on November 4, 2026, at commit 021fccb (https://github.com/openai/codex/tree/021fccb046508938c4754982efccfb51d6e8356e)

## What is your repo built with?

Any public repo, with no account: https://seerepo.com/r/owner/repo/built, with the owner and name it has on GitHub.