Kerlig AI

Overview

Kerlig™ is a professional AI writing application designed specifically for macOS, enabling users to compose emails, Slack replies, Jira tickets, and more while preserving their unique tone of voice. It acts as a native, system-wide assistant that brings AI capabilities directly into any app on your Mac, eliminating the need to switch between your browser and a separate AI web interface. Built for speed and integration, Kerlig supports both Apple Silicon and Intel Macs running macOS 12 or later.

The application leverages a wide range of AI providers and models, including OpenAI, Anthropic, Google Gemini, Groq Cloud, OpenRouter, xAI, Perplexity, LM Studio, Mistral, Amazon Bedrock, and Apple Foundation Models, with over 350 supported models. Users can connect via their own API keys or use on-device local models through Ollama and LM Studio. Kerlig includes built-in actions for fixing spelling and grammar, improving writing, summarizing, making text shorter, converting content to TypeScript interfaces, and more. Users can also create custom presets to tailor actions to their specific workflow. Attachments enable analysis, summarization, and chat with popular document types, while deep research supports reasoning models for multi-step online research.

Privacy is emphasized: messages are sent directly to the chosen AI provider and then stored and encrypted on the user's Mac. The app also offers global hotkeys and shortcuts for rapid execution, headless mode for background actions, chat history, citations, and the ability to regenerate responses or compare outputs from different models. Kerlig is positioned as a powerful alternative to Grammarly and a comprehensive AI assistant for professional communication.

Kerlig is available as a one-time purchase with lifetime updates in the Basic and Pro licenses, or a Team license for larger deployments. It is trusted by over 5,000 employees and teams, with a 4.9 aggregate rating based on 147 user reviews.

Core capabilities

Native macOS integration

Use AI in any app on macOS via a global hotkey, with no context switching required.

Multi-provider support

Connect to OpenAI, Anthropic, Google Gemini, Groq, OpenRouter, xAI, Perplexity, Mistral, Amazon Bedrock, and Apple Foundation Models with your own API keys.

350+ AI models

Access all supported models in one app and switch between them with a single click.

Personalized writing

Write emails, Slack replies, and Jira tickets that match your tone of voice.

Proofreading and grammar correction

Catch spelling and grammar mistakes before sending, improve text quality, and polish your writing.

Chat with documents

Analyze, summarize, and chat with webpages, ebooks, images, and other popular document types via attachments.

Built-in and custom actions

Use pre-built actions or create custom presets to automate and supercharge your daily workflows.

Privacy and encryption

Messages are sent directly to AI providers, then stored and encrypted locally on your Mac.

Deep research

Use reasoning models for multi-step research that leverages online data.

Team deployment

Deploy remotely to teams using CLI commands, with local model support via Ollama and LM Studio.

Chat interface

Chat like you would in ChatGPT, with message editing, history, citations, and regeneration capabilities.

Use cases

Drafting important email replies with your own tone of voice

Writing professional Slack updates based on Linear tickets or other project data

Proofreading and fixing grammar mistakes before sending client communications

Summarizing lengthy web articles, YouTube videos, or documents to extract key information

Chatting with ebooks, images, or PDFs to find specific details quickly

Converting notes or braindumps into coherent, structured content

Running deep research using reasoning models for multi-step analysis