BastionChat

Your data belongs to you. Your AI should too.

Bastion Chat puts a powerful, private AI assistant in your pocket — no subscriptions, no usage limits, no servers watching over your shoulder. Everything runs locally on your device, so your conversations stay completely confidential. Even offline.

——— KEY FEATURES ———

YOUR PRIVATE AI, YOUR RULES
Experience top-tier reasoning and "thinking" models without compromising an ounce of privacy. All processing happens on-device. Your conversations are never uploaded, never analyzed, never sold. Just you and your AI.

CURATED MODEL CATALOG
Browse and download a hand-picked selection of the best open-source models — from compact 1B models that run on any iPhone, to powerful 27B models on iPad and Mac. Thinking models, vision models, tool-use specialists — all pre-configured and ready to run.

VISION & MULTIMODAL AI
Ask questions about images, analyze screenshots, describe photos, or extract text from documents. Bastion Chat supports multimodal models that see and understand the world alongside you.

AGENTIC AI — YOUR AI THAT ACTS
Go beyond chat. Enable Agent Mode to let Bastion Chat reason through complex tasks, plan multi-step solutions, and execute actions autonomously using built-in tools. Your private AI that doesn't just talk — it does.

FULL RAG & DOCUMENT INDEXATION
A complete knowledge pipeline in the palm of your hand. Import PDFs, web pages, Wikipedia articles, or plain text. Bastion Chat indexes your personal knowledge base using full retrieval-augmented generation so answers are always grounded in your content.

AI-POWERED SUMMARIES IN SECONDS
Overwhelmed by lengthy articles or dense reports? Bastion Chat distills complex content into clear, actionable summaries. Grasp the key points instantly and save hours of reading.

SMART WEB SEARCH, ON DEMAND
Need real-time information? Enable the optional web search tool to ground your answers in live results — without sacrificing your privacy or your workflow.

BRING YOUR OWN MODEL
Import any GGUF model directly from Hugging Face or your local files. Capabilities like advanced reasoning, tool use, and vision are detected and configured automatically on import.

SCALES WITH YOUR DEVICE
On iPhone, run fast and efficient models for everyday tasks. On iPad and Mac, unleash frontier-class models like Qwen 27B for deep research, long-form writing, and complex reasoning — all still 100% local.

ONE PURCHASE. YOURS FOREVER.
No usage caps. No API costs. Pay once and run unlimited queries for as long as you own your device.