On-Device AI vs Cloud AI: Where Your Agent Runs Changes What It Can Do
The core difference
A cloud AI assistant runs on a remote company's servers. To act on your behalf, it needs your data — and often your passwords — sent to it over the internet. An on-device (local) AI assistant like BackBrain runs on your own computer, so your files, sessions, and credentials stay where they already are.
Side-by-side comparison
| Capability | Cloud AI assistant | On-device AI (BackBrain) |
|---|---|---|
| Where it runs | Remote servers | Your own computer |
| Your passwords | Uploaded to the service | Kept in BackBrain's built-in encrypted vault |
| Access to your files & phone | Limited or none | Direct, on your device |
| Works offline | No | Core actions run locally |
| Acts inside your real accounts | Rarely, and risky | Yes, with your approval |
| Ongoing cost | Usually a subscription | Free beta, no subscription |
Privacy: the on-device difference
Credentials are encrypted locally and never logged. If you use a cloud AI model, BackBrain redacts sensitive data first and never transmits credential screens. If you'd rather send nothing at all, local-only mode runs every AI decision on a local model with cloud egress blocked. Learning stays on your machine either way.
Reliability: degrades gracefully
If your AI provider has an outage mid-task, BackBrain retries, fails over between your configured providers, and keeps the run alive — you can take over the screen and it learns from what you do. Tasks it already knows replay from local memory with zero AI calls.
When should you choose on-device AI?
Choose a local assistant whenever a task touches sensitive accounts or data: tax-season portal work, downloading bank statements, sending financial reports, or anything where uploading a password to a third party would be unacceptable. BackBrain is built specifically for this category — real execution on your machine, with a human approval step before any critical action. Watch the demo to see a real task from start to finish.
Get BackBrain to do this for you
BackBrain is in free private beta for Windows and Android. Reserve early access.
Reserve Early Access — hello@backbrain.inFrequently asked questions
Is on-device AI safer than cloud AI?
For tasks involving your accounts and private files, yes. On-device AI like BackBrain keeps your passwords and data on your own computer, while cloud AI requires sending them to a remote service.
Can cloud AI assistants log into my bank for me?
Most cannot, and doing so would mean uploading your banking password to a third-party server. BackBrain performs the login locally instead, signing in from BackBrain's built-in encrypted vault so the credentials never leave your device.
Does on-device AI work without internet?
BackBrain runs its core intelligence and actions locally, so much of its work continues without a constant cloud connection. A site it operates may still need the internet to load, but your data is processed on your machine.