deno vs flow

deno and flow share 4 technologies: React, Tokio, log, and tracing. Both are written in Rust.

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What they share and what sets them apart

denoland

deno

A modern runtime for JavaScript and TypeScript.

Rust108.8kRead on November 4, 2026, at commit e7b39ebWhat is deno built with?

Only in deno

In common

meta

flow

Adds static typing to JavaScript to improve developer productivity and code quality.

Rust22.3kRead on November 5, 2026, at commit 4449099What is flow built with?

Only in flow

  • ora

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
deno1,217,015 lines written1,355 code files
flow1,067,786 lines written1,098 code files
Who writes itA commit counts as AI's when it carries its signature: a Co-Authored-By line, its author name or the merge of its branch.
deno2.4% of its commits signed by AIWith Claude Code, GitHub Copilot, Cursor, and Codex
flow0% of its commits signed by AI
ActivityFrom GitHub and its history, on the day SeeRepo read it.
denoLast push October 29, 202617,392 commits108,801 stars
flowLast push November 5, 202622,732 commits22,307 stars
TestsThe files that test the code, and the share of code files a test imports.
deno4,394 test files6.1% of its code files have a test that imports them
flow8,664 test files19.1% of its code files have a test that imports them

Frequently asked questions

Which is bigger, deno or flow?
deno, with 1,217,015 lines written; flow has 1,067,786.

The proof: denoland/deno's code at commit e7b39eb

Which has more GitHub stars, deno or flow?
deno, with 108,801 stars; flow has 22,307.

The proof: denoland/deno on GitHub

Which has more tests, deno or flow?
flow, with 8,664 test files; deno has 4,394.

The proof: meta/flow's code at commit 4449099

Which was updated more recently, deno or flow?
flow: its last push was on November 5, 2026, and deno's on October 29, 2026.

The proof: meta/flow's commits on GitHub

Which has more commits signed by AI, deno or flow?
deno: an AI signed 2.4% of its commits, with Claude Code, GitHub Copilot, Cursor, and Codex.

The proof: the commits each tool signed in denoland/deno

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