Open Otter
Developer Tools
Only for Mac
$9.99
Mac
Run LLMs locally on your Mac with Apple Silicon GPU acceleration. Private, offline, and OpenAI-compatible. Turn your Mac into a full AI workstation — no cloud
needed.
Open Otter — Local AI Workstation for macOS
Open Otter transforms your Mac into a powerful AI workstation. Run large language models locally with full Apple Silicon GPU acceleration — your data never
leaves your device.
LOCAL LLM INFERENCE
Run state-of-the-art language models natively on your Mac using the MLX framework. Enjoy fast, streaming text generation with no internet connection required.
Support for a wide range of open-source models including Llama, Qwen, Mistral, Gemma, and more.
OPENAI-COMPATIBLE API SERVER
Open Otter includes a built-in HTTP server that exposes the standard /v1/chat/completions endpoint. Drop it into any workflow that uses the OpenAI API —
development tools, scripts, and third-party apps work seamlessly with your local models.
DISTRIBUTED INFERENCE CLUSTER
Connect multiple Macs on your local network to run larger models that exceed a single machine's memory. Automatic peer discovery via Bonjour, leader election,
and intelligent shard placement let you scale inference across devices with zero configuration.
REAL-TIME MONITORING
A built-in dashboard tracks GPU utilization, memory pressure, power draw, thermal state, and inference metrics (tokens per second, time to first token). Know
exactly how your hardware is performing at a glance.
MODEL MANAGEMENT
Browse and download models from HuggingFace, hf-mirror, and ModelScope directly within the app. Manage your local model library, view model metadata, and switch
between models instantly.
PERFORMANCE OPTIMIZATION
- SSD-backed KV cache persists context across sessions, dramatically speeding up repeated and long conversations
- Benchmarking tools to measure and compare model performance on your hardware
- Efficient memory management with LRU cache eviction
VECTOR DATABASE & DATASETS
Built-in vector database and dataset management tools support retrieval-augmented generation (RAG) workflows entirely on-device. Index your documents and
enhance model responses with local knowledge — privately.
DESIGNED FOR macOS
- Native SwiftUI interface with full dark mode support
- Menu bar extra for quick access to server controls and resource overview
- Runs on macOS 15 and later, optimized for Apple Silicon (M1/M2/M3/M4)
PRIVACY BY DESIGN
No accounts. No telemetry. No cloud processing. Every computation happens on your hardware. Your conversations, documents, and data remain entirely under your
control.
Whether you're a developer building AI-powered applications, a researcher experimenting with open models, or anyone who values privacy — Open Otter gives you a
complete, self-contained AI environment right on your Mac.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, 杰 何, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- 杰 何
- Size
- 10.6 MB
- Category
- Developer Tools
- Compatibility
Requires macOS 15.0 or later.
- Mac
Requires macOS 15.0 or later.
- Mac
- Languages
English and 2 more
- English, Simplified Chinese, Traditional Chinese
- Age Rating
4+
- 4+
- Copyright
- © 2026 Jie He
