wasmtime vs zed

wasmtime and zed share 5 technologies: Tokio, log, tracing, env_logger, and tracing-subscriber. Both are written in Rust.

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What they share and what sets them apart

bytecodealliance

wasmtime

A lightweight WebAssembly runtime that is fast, secure, and standards-compliant

Rust18.8kRead on November 6, 2026, at commit 0ad712cWhat is wasmtime built with?

Only in wasmtime

In common

zed-industries

zed

Code at the speed of thought – Zed is a high-performance, multiplayer code editor from the creators of Atom and Tree-sitter.

Rust92.7kRead on November 4, 2026, at commit e21ff1bWhat is zed built with?

Only in zed

Side by side

SizeLines written by people and agents, without generated ones; code files, without tests.
wasmtime829,462 lines written1,588 code files
zed1,835,785 lines written1,779 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.
wasmtime0.1% of its commits signed by AIWith Claude Code and Gemini CLI
zed0.5% of its commits signed by AIWith Claude Code, Amp, Factory, GitHub Copilot, Codex, Cursor, and Gemini CLI
ActivityFrom GitHub and its history, on the day SeeRepo read it.
wasmtimeLast push November 6, 202616,773 commits18,832 stars
zedLast push November 4, 202637,547 commits92,679 stars
TestsThe files that test the code, and the share of code files a test imports.
wasmtime422 test files4.2% of its code files have a test that imports them
zed140 test files18.1% of its code files have a test that imports them

Frequently asked questions

Which is bigger, wasmtime or zed?
zed, with 1,835,785 lines written; wasmtime has 829,462.

The proof: zed-industries/zed's code at commit e21ff1b

Which has more GitHub stars, wasmtime or zed?
zed, with 92,679 stars; wasmtime has 18,832.

The proof: zed-industries/zed on GitHub

Which has more tests, wasmtime or zed?
wasmtime, with 422 test files; zed has 140.

The proof: bytecodealliance/wasmtime's code at commit 0ad712c

Which was updated more recently, wasmtime or zed?
wasmtime: its last push was on November 6, 2026, and zed's on November 4, 2026.

The proof: bytecodealliance/wasmtime's commits on GitHub

Which has more commits signed by AI, wasmtime or zed?
zed: an AI signed 0.5% of its commits, with Claude Code, Amp, Factory, GitHub Copilot, Codex, Cursor, and Gemini CLI; in wasmtime, 0.1%.

The proof: the commits each tool signed in zed-industries/zed

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