Koi Editor

Koi Editor

Hackerman, Inc.
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About

Koi Editor is a professional text editor for Mac, built around three principles: fast, local, and scriptable. Koi is designed for responsive editing from ordinary source files to very large documents. It includes multi-cursor editing, synchronized views, project-wide search, context-aware autocomplete, syntax highlighting for 30+ languages, code folding, file outlines, configurable themes and keybindings, and extensive editing commands. Koi requires no account, includes no telemetry, and can operate entirely offline. Configuration and keybindings are plain text, and custom editor commands can be written in Python. Optional AI features connect directly to local models through Ollama for code completion and inline assistance. Built specifically for Apple Silicon Macs, Koi combines a high-performance editing core with native macOS integration.

About

MangoWriter is a secure text editor for Windows designed to run completely offline with no cloud, AI, network connections, or telemetry, offering a familiar, simple editing experience while keeping content private by default. It uses state-of-the-art AES-256-GCM encryption with strong key derivation (Argon2id) and optional keyfile two-factor support, ensuring no plaintext is ever written to disk and eliminating caches or temp files. MangoWriter protects your work with a secure clipboard that binds copied content to the current session, an instant lock screen to mask content when stepping away, and one-click bulk redaction tools to permanently black out selected text across documents. Sensitive buffers are zeroed after use and your password never gets stored on disk, with key material kept only in secure memory while a document is unlocked. It is delivered as clean, code-signed builds available as an MSI installer or portable ZIP and includes secure export options.

Platforms Supported

Windows Not Supported
Mac Supported
Linux Not Supported
Cloud Not Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Supported
Mac Not Supported
Linux Not Supported
Cloud Not Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Software developers, programmers, and technical professionals on macOS who value fast, responsive editing, large-file performance, local workflows, keyboard-driven operation, and a scriptable environment.

Audience

Professionals and individuals who need a secure offline text editor to write and protect sensitive text with strong encryption and redaction tools

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Not Supported

API

Offers API Not Supported

Screenshots and Videos

Screenshots and Videos

Pricing

$195, one-time
Free for non-commercial use.
Free Version Supported
Free Trial Not Supported

Pricing

No information available.
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

Hackerman, Inc.
Founded: 2025
United States
koieditor.com

Company Information

MangoWriter
mangowriter.net

Alternatives

Alternatives

Categories

Text Editors Supported

Categories

Text Editors Supported

Text Editors Features

API Not Supported
Auto-Complete Supported
Code Folding Supported
Column Editing Supported
Customizable Themes Supported
Debugging Not Supported
Formatting / Table Editing Not Supported
Keyboard Shortcuts Supported
Multi-Monitor Editing Supported
Syntax Highlighting Supported
WYSIWYG Not Supported

Integrations

.NET Not Supported
C Supported
C++ Supported
CSS Supported
D Supported
HTML Supported
Haskell Supported
Java Supported
JavaScript Supported
LaTeX Supported
Lua Supported
Mojo Supported
Odin Supported
Ollama Supported
PHP Supported
Python Supported
Rust Supported
Windows 10 Not Supported
YAML Supported
Zig Supported

Integrations

.NET Supported
C Not Supported
C++ Not Supported
CSS Not Supported
D Not Supported
HTML Not Supported
Haskell Not Supported
Java Not Supported
JavaScript Not Supported
LaTeX Not Supported
Lua Not Supported
Mojo Not Supported
Odin Not Supported
Ollama Not Supported
PHP Not Supported
Python Not Supported
Rust Not Supported
Windows 10 Supported
YAML Not Supported
Zig Not Supported
Claim Koi Editor and update features and information
Claim Koi Editor and update features and information
Claim MangoWriter and update features and information
Claim MangoWriter and update features and information