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Msty

Desktop and web AI workspace for running local and cloud LLMs side by side, with split chats, personas, and knowledge stacks

Msty Studio is a polished workspace for chatting with local and hosted models in one place — llama.cpp, Apple MLX, and Ollama engines are supported out of the box, and it installs as an ordinary app on Windows, macOS, and Linux rather than as a self-hosted server. The Free tier is unusually generous, covering Agent Mode, Knowledge Stacks, and MCP tools. Aurum costs $149 per user per year, or $349 as a one-time lifetime license good for 2 desktop devices. Best for people who want a graphical local-LLM app with real RAG.

Verified JUL 19, 2026 FREEMIUM Live
Screenshot of Msty

What is Msty?

Msty is a private AI workspace from CloudStack, LLC that puts local and hosted language models behind a single interface. The current product is Msty Studio, which ships both as a desktop app for Windows, macOS (Apple Silicon and Intel), and Linux, and as a web app for paid users. Local inference runs through llama.cpp, Apple MLX, or Ollama engines supported out of the box, while hosted providers like OpenAI, Azure, and Amazon Bedrock plug in alongside them — so a cheap local model and a frontier cloud model can sit in the same conversation list without changing tools.

The workspace features are what separate it from a plain model runner. Split chats run several models on one prompt side by side for direct comparison. Knowledge Stacks handle retrieval over your own files with watch modes, chunk visualizers, and retrieval analytics. Persona and Crew conversations let multiple configured assistants collaborate in a single thread, and Agent Mode carries out multi-step tasks with MCP tools from the Toolbox. Msty Studio replaced the original Msty App v1.x, which is being phased out; Studio installs separately and a migration tool carries some legacy data over. The app is closed source, which is the main trade-off against Ollama and Open WebUI.

Who is it for?

Msty suits people who want the privacy and zero-marginal-cost economics of local inference but not the terminal work and container setup that usually come with it. The free tier is capable enough to be a daily driver — Agent Mode, Knowledge Stacks, and MCP tools are all included — so the paid Aurum tiers are mostly about web access, enterprise model providers, and power-user features rather than unlocking the basics. The one-time lifetime license is the distinguishing commercial detail: most competitors in this space are either fully free or subscription-only.

  • Privacy-sensitive professionals in law, healthcare, or finance who need documents to stay on the machine, and who want RAG over local files rather than uploading to a cloud chat product.
  • People who compare models constantly and want split chats and a unified Model Hub instead of juggling several apps or browser tabs.
  • Users who dislike subscriptions and would rather buy a lifetime license once, provided the 2-device desktop activation limit fits how they work.
  • Anyone who found Ollama too command-line driven or Open WebUI too much of a self-hosting project, and who wants more workspace structure than LM Studio offers.
  • Small teams needing governance — the Enterprise and Teams plan adds SSO, role-based access control, shared Knowledge Stacks, and an audit log from 5 seats up.

How much does Msty cost?

Starting price: $149/yr · Free tier: yes · Model: freemium

Pricing verified JUL 19, 2026

Price history tracked from June 2026

Msty pricing tiers, verified against the official pricing page
Plan Price Includes
Free Free Msty Studio Desktop, free forever · Chat with local and online models · Agent Mode and Knowledge Stacks · Persona and Crew conversations · Toolbox MCP tools, user memories, web search · Persona, Prompt, Skill, and Media studios
Aurum $149/user/yr Everything in Free, on Studio Desktop · Msty Studio Web access · Azure and Amazon Bedrock providers · Studio Assistants and Shadow Personas · Turnstiles and Toolbox Live Contexts · Insights and Forge Mode
Aurum Lifetime $349 one-time One-time payment, no renewal · All Aurum features · Lifetime updates and access · Activates on up to 2 desktop devices
Enterprise & Teams $300/user/yr All Aurum features, minimum 5 seats · SSO integrations · User and team management · Role-based access control · Shared Knowledge Stacks, Prompts, and Personas · Audit log

What are Msty's key features?

  • Model Hub covering local engines (llama.cpp, Apple MLX, Ollama) and hosted providers in one place
  • Split Chats to run multiple models side by side and compare responses without losing context
  • Knowledge Stacks for RAG, with watch modes, chunk visualizers, and retrieval analytics
  • Agent Mode for multi-step, tool-aware task execution beyond single-turn prompting
  • Persona and Crew conversations, where several persona assistants collaborate in one thread
  • Prompt, Persona, Skill, and Media studios for building reusable prompts, assistants, and image or video workflows
  • Toolbox with MCP tool support, toolsets, and Live Contexts on paid tiers
  • Vibe CLI Proxy to pull models from Claude Code, Codex, Gemini, and Copilot CLIs into Studio chats
  • Context Studio for managing reusable files, websites, YouTube videos, and media as a context library

What people use Msty for

  1. 01 Running a private assistant against local models so documents and prompts never leave the machine
  2. 02 Comparing several models on the same prompt in one view using split chats before committing to one
  3. 03 Grounding answers in your own files with Knowledge Stacks rather than pasting documents into a chat window
  4. 04 Mixing a cheap local model and a frontier hosted model in the same workspace, switching per task
  5. 05 Delegating multi-step work to Agent Mode with MCP tools instead of prompting step by step

Pros and cons

Pros and cons of Msty
Pros Cons
The free tier is genuinely capable — Agent Mode, Knowledge Stacks, and MCP tools are not paywalled Closed source, unlike Ollama and Open WebUI, so you cannot audit or self-host the application itself despite the local-first privacy pitch
A one-time lifetime license is rare among AI apps and includes all future updates with no renewal Local model speed is capped by your own hardware; large models need substantial RAM and a fast GPU or Apple Silicon
Local and hosted models coexist in one workspace, so you can route by cost, quality, or privacy per prompt The Aurum activation limit is 2 desktop devices, shared with the legacy Msty App, which is tight if you use a laptop, a desktop, and a work machine
Ships as a standard installer for Windows, macOS (Apple Silicon and Intel), and Linux — no server to stand up Upgrading from Aurum Yearly to Lifetime is only refunded if the yearly purchase was made within the previous 30 days
Msty publishes no end date for lifetime license availability but also gives no guarantee it stays on sale indefinitely

What are the best Msty alternatives?

See all Msty alternatives →

How people make money with Msty

  • Set up private on-device AI workspaces for law firms, clinics, and accounting practices that cannot send client files to cloud APIs, billed per engagement or on a monthly retainer since the client runs inference on hardware they already own
  • Build and sell curated Knowledge Stacks, personas, and Prompt Studio templates for specific niches; the one-time lifetime license shape means buyers face no recurring app fee to keep using what you deliver

Frequently asked questions

Is Msty free?

Yes. Msty Studio Desktop has a Free tier that does not expire. It covers chat with local and online models, Agent Mode, Knowledge Stacks, Persona and Crew conversations, MCP tools through Toolbox, user memories, web search, and the Prompt, Persona, Skill, and Media studios. Paid Aurum plans add Studio Web, Azure and Bedrock providers, Live Contexts, Insights, and Forge Mode.

Does Msty offer a lifetime license?

Yes. Aurum Lifetime is a one-time payment of $349 per user that unlocks every Aurum feature plus all future updates, with nothing to renew. The alternative is an Aurum yearly subscription at $149 per user. If you bought Aurum Yearly within the previous 30 days, Msty will refund it once you purchase the lifetime license.

How many devices can one Msty license activate?

An Aurum license activates on up to 2 desktop devices, and that limit is shared between the legacy Msty App v1.x and Msty Studio Desktop. Msty Studio Web carries no device limit, so one Aurum license works across any number of browsers. You can free a slot by deactivating an unused device in the activation portal.

Is Msty Studio the same as the original Msty App?

No. Msty Studio is a ground-up rewrite that replaces the original Msty App v1.x, which is being phased out. Studio Desktop installs separately, so both can run side by side during a transition, and a migration tool moves some existing data across. The same Aurum license key works for either product.

How is Msty different from LM Studio or Ollama?

All three run open-weight models on your own machine. Ollama is command-line and server oriented, LM Studio centers on model discovery plus an OpenAI-compatible local server, and Msty leans on workspace features: split chats, Knowledge Stacks for RAG, personas, and Agent Mode. Msty is closed source, while Ollama and Open WebUI are open source.

Does Msty work offline?

For local models, yes. Msty Studio Desktop runs llama.cpp, Apple MLX, and Ollama engines locally, so once the weights are downloaded those conversations need no internet connection. Connecting hosted providers such as OpenAI, Azure, or Amazon Bedrock naturally requires network access, and Msty Studio Web is browser-based rather than local.

What does Msty cost for a team?

The Enterprise and Teams plan is $300 per user billed yearly, with a minimum of 5 seats. It includes every Aurum feature and adds SSO integrations, user and team management, role-based access control, sharing of Knowledge Stacks, prompts and personas across the org, and an audit log.