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Stella, in detail.

A desktop app that gives you one ongoing chat for your computer. Ask once, keep talking, and Stella figures out which agent, app, file, browser, model, or tool should handle the work.

Background agents can handle independent work and report progress inline without making you manage separate threads.

Free. No credit card, no trial.

You can use Stella for research, writing, spreadsheets, PDFs, Word documents, browser tasks, computer control, image generation, video and 3D workflows, media prompts, scheduling, reminders, dictation, realtime voice, and connected apps.

Those capabilities belong in one personal desktop app, one chat, and a consistent interface instead of a maze of separate tools and modes.

Behind the scenes, Stella can split work into smaller jobs, run specialized agents, keep track of active threads, and bring the result back into the conversation. Orchestrator mode is the default, so you stay in one conversation instead of becoming the project manager for your assistant.

Use your computer

Inspect the screen, click, type, open apps, navigate windows, and work with what is actually in front of you.

Use the web

Browse, search, read pages, fill forms, and use browser context when it helps.

Work with files

Read, write, organize, summarize, and transform documents, spreadsheets, PDFs, presentations, images, and generated outputs.

Create media

Help make images, video, audio, 3D assets, small apps, games, mockups, and visual artifacts. Image, video, 3D, and voice generation come with the Pro plan.

Listen and speak

Use in-app dictation, OS-wide dictation, read-aloud, and realtime voice. Wake-word activation is optional. Dictation and wake word are on every tier; read-aloud and realtime voice come with the Pro plan.

Run routines

Create reminders, recurring check-ins, scheduled work, and local automations from plain English.

Connect apps

Use supported services, including the Stella mobile app, Google Workspace, and Store-backed integrations.

Choose your model

Use Stella's managed provider, bring your own keys, use local models, pick OpenRouter-style options where supported, or select Claude Code as the engine.

Full desktop window

Chat, display, settings, history, Store, media, files, and everything else in one place.

Quick access

Capture, chat, add context, or start voice from the app or page you are already using.

Mini window

Keep a smaller Stella surface nearby for fast asks without taking over your screen.

Voice and dictation

Dictate into Stella, dictate into other apps when enabled, or talk to Stella in realtime.

Phone

Pair the mobile app with your desktop so your phone can message the Stella running on your computer.

Mobile app

Message Stella from the mobile app. Full desktop-powered execution depends on pairing with your desktop, which stays available.

Some features need a backend: sign-in, billing, plan limits, managed model access, connected app setup, mobile pairing, push notifications, and optional cloud features. Third-party model, media, and search providers process submitted content under their own policies and configurations. The important boundary is that Stella does not need a cloud copy of your whole desktop life to work.

What we store

Account and billing records

Sign-in identity, billing profile state, Stripe customer and subscription references, usage credit records, and payment metadata needed to run paid plans.

Usage metadata

For managed model calls: owner ID, model, agent type, token counts, duration, success or failure, estimated cost, billing plan, and timestamps.

Anonymous limit counters

A salted hash of the device or client identifier, request count, first request time, and last request time. Current retention is seven days after last use.

Device and pairing metadata

Device IDs, device names where provided, platform, presence timestamps, mobile pairing records, pairing secret hashes, push tokens, and bridge registration URLs.

Connected app metadata

The minimum connection records needed to know which account is linked to which Stella user and provider. Some connection secrets are encrypted.

Remote delivery state

When you message Stella from a paired phone, the backend may store request text, delivery metadata, request state, and routing info so the desktop can claim, cancel, complete, and deliver the work.

Optional cloud content

Cloud backups, Store publishing, social or collaboration surfaces, and other hosted features store the data required to provide those features.

Provider processing

Model, media, and search providers process submitted prompts, files, outputs, queries, and metadata. Their retention depends on provider policies and Stella's configuration.

Data ordinarily kept local

Your local desktop files merely because they exist on your device.
Your normal local desktop chat database as a whole.
Your local memory markdown and runtime state unless submitted to a cloud-backed feature.
Your local provider API keys.
BYOK model traffic when the model call goes directly from your device to your provider.

Stella Provider lets you install the app and start using strong models without setting up accounts everywhere. Requests pass through Stella's infrastructure so billing and limits can work. Responses may be buffered briefly for stream recovery, and providers may retain submitted data under their policies.

You can also add your own provider credentials, use local runtimes, and use Claude Code directly as the assistant engine. In those paths, Stella is acting as the desktop app and runtime you control, not as the model vendor.

Read the changelog

Stella is your desktop app.

Ready to work across your computer.