Koi Editor
A fast, minimal code editor for macOS, built for low-latency editing, large files, and local workflows.
A startup from San Francisco, the United States that is founded by Michael Sjoberg.
A fast, minimal code editor for macOS, built for low-latency editing, large files, and local workflows.
A startup from San Francisco, the United States that is founded by Michael Sjoberg.
This page is designed to help you find out whether Koi Editor is good and if it is the right choice for you.
Koi Editor is a fast, minimal, scriptable code editor for macOS, built with a focus on low typing latency, large files, and local workflows.
Koi combines traditional text editing with modern development features, including multi-cursor editing, multiple views of the same document, project-wide search, code completion, syntax highlighting, configurable themes and keybindings, and optional AI features.
Performance is a core part of the editor. Koi is designed to remain responsive while working with large source files and has been tested with files containing tens of millions of lines.
AI features are optional and can run locally using Ollama, making Koi suitable for offline and sensitive codebases without requiring code to be sent to a remote service.
Koi is built specifically for macOS and integrates with native Mac features and workflows. It requires no account, includes no telemetry, and can be used entirely offline.
Highlights
Listed in
Low-latency editing
Koi is designed around responsive editing, with measured typing latency around 10–16 ms on modern Apple Silicon hardware.
Large-file support
Open and edit very large files while retaining syntax highlighting and core editing features. Koi has been tested with files containing tens of millions of lines.
Native macOS Integration
Built specifically for macOS with native window controls, dialogs, alerts, file handling, and other Mac-specific integrations.
Multi-cursor editing
Edit multiple locations simultaneously with multi-cursor and multi-selection commands for fast text manipulation.
Multiple views of a document
Open multiple synchronized views of the same document, making it easy to work with different parts of a large file at once.
Project search and navigation
Search across projects and quickly navigate between files, buffers, recent changes, symbols, and other locations.
Scriptable and configurable
Customize themes, keybindings, editor behavior, commands, and other settings to adapt Koi to different workflows.
Local AI Support
Use optional code completion and inline AI features with local models through Ollama, without requiring code to leave your computer.
Offline and private
Koi requires no account, includes no telemetry, and can be used entirely offline.
Koi uses a custom fork of the Scintilla editing engine with its own syntax lexers and editing extensions. The interface combines Qt with native macOS AppKit integrations, and optional local AI features can connect to models through Ollama.
Koi combines the speed and directness of a traditional text editor with modern development features, while remaining focused on performance and local workflows. It is built specifically for macOS, has measured typing latency around 10–16 ms on modern Apple Silicon hardware, and can work with files containing tens of millions of lines. Koi also supports optional local AI through Ollama, requires no account, and includes no telemetry.
Koi is designed for developers who value fast, responsive editing and want a capable editor without a heavy development environment. It is particularly suited to users who work with large files, prefer native Mac software, want extensive text-editing features, or want AI functionality without making AI the center of their editor.
Koi can also operate entirely offline and does not require an account or collect telemetry.
Koi is primarily built for developers and technical users on macOS who prefer fast, keyboard-driven text editors. It is especially relevant to users of editors such as Sublime Text, BBEdit, Vim, Neovim, and lightweight VS Code setups who want a modern Mac-focused alternative.
It is also useful for people working with large source files, logs, structured text, Markdown, and other text-heavy workflows.
Koi started from a simple idea: a modern text editor should be able to add useful new capabilities without sacrificing the responsiveness and simplicity that made traditional editors good.
The editor has been developed with a strong focus on typing latency, large-file performance, text manipulation, native macOS integration, and local-first features. Rather than building around cloud services or accounts, Koi treats the local editor as the core product, with features such as AI remaining optional.
We have collected here some useful links to help you find out if Koi Editor is good.
Check the traffic stats of Koi Editor on SimilarWeb. The key metrics to look for are: monthly visits, average visit duration, pages per visit, and traffic by country. Moreoever, check the traffic sources. For example "Direct" traffic is a good sign.
Check the "Domain Rating" of Koi Editor on Ahrefs. The domain rating is a measure of the strength of a website's backlink profile on a scale from 0 to 100. It shows the strength of Koi Editor's backlink profile compared to the other websites. In most cases a domain rating of 60+ is considered good and 70+ is considered very good.
Check the "Domain Authority" of Koi Editor on MOZ. A website's domain authority (DA) is a search engine ranking score that predicts how well a website will rank on search engine result pages (SERPs). It is based on a 100-point logarithmic scale, with higher scores corresponding to a greater likelihood of ranking. This is another useful metric to check if a website is good.
The latest comments about Koi Editor on Reddit. This can help you find out how popualr the product is and what people think about it.
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Is Koi Editor good? This is an informative page that will help you find out. Moreover, you can review and discuss Koi Editor here. The primary details have been verified within the last quarter. So they could be considered up to date. If you think we are missing something, please use the means on this page to comment or suggest changes. All reviews and comments are highly encouranged and appreciated as they help everyone in the community to make an informed choice. Please always be kind and objective when evaluating a product and sharing your opinion.
