Source: https://seerepo.com/compare/neondatabase/neon/vs/openai/codex
Markdown source: https://seerepo.com/compare/neondatabase/neon/vs/openai/codex.md
Description: neon and codex share 9 technologies: axum, tower, Sentry, Tokio, hmac, tracing, tracing-subscriber, tracing-appender, and log. Both are written in Rust.

# neon vs codex

neon and codex share 9 technologies: axum, tower, Sentry, Tokio, hmac, tracing, tracing-subscriber, tracing-appender, and log. Both are written in Rust.

- [neondatabase/neon](https://seerepo.com/r/neondatabase/neon): Neon: Serverless Postgres. We separated storage and compute to offer autoscaling, code-like database branching, and scale to zero.
- [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: axum, tower, Sentry, Tokio, hmac, tracing, tracing-subscriber, tracing-appender, log
- Only in neon: asyncpg, aws-sdk-s3, pg8000, psycopg2-binary, Postgres, moka, Redis, clickhouse-connect, AWS S3, werkzeug, AIOHTTP, jsonwebtoken, ed25519-dalek, pyjwt, jinja2, parquet, opentelemetry-semantic-conventions, prometheus, prometheus-client, env_logger, opentelemetry-otlp, tracing-opentelemetry, psutil, boto3, OpenTelemetry
- Only in codex: lru, SQLite, objc2-app-kit, objc2-foundation, Ratatui, crossterm, keyring, rmcp, png, image, pulldown-cmark, zip, schemars, Pydantic

## Side by side

| | neon | codex |
|---|---|---|
| Size | 379,885 lines written, 659 code files | 2,320,674 lines written, 4,216 code files |
| Who writes it | 0.1% of its commits signed by AI. With Devin | 2.8% of its commits signed by AI. With Codex, Claude Code, and GitHub Copilot |
| Activity | Last push August 31, 2026, 8,459 commits, 23,296 stars | Last push November 4, 2026, 13,099 commits, 133,103 stars |
| Tests | 281 test files. 12.4% 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, neon or codex?

codex, with 2,320,674 lines written; neon has 379,885.

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

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

codex, with 133,103 stars; neon has 23,296.

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

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

codex, with 2,448 test files; neon has 281.

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

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

codex: its last push was on November 4, 2026, and neon's on August 31, 2026.

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

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

codex: an AI signed 2.8% of its commits, with Codex, Claude Code, and GitHub Copilot; in neon, 0.1%.

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

## Sources

- neondatabase/neon: Read on November 4, 2026, at commit fa50421 (https://github.com/neondatabase/neon/tree/fa504217c61bbcaf5c512d75830564541f917f8f)
- 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.