Localyze.ai wins on privacy
No Microsoft account, no cloud upload, no telemetry SDKs, no training on your prompts, and a one-time model download instead of a constant uplink.
Comparison
Localyze.ai vs Copilot
Copilot ships everywhere Microsoft does — Office, Windows, Edge, GitHub. Localyze.ai is the opposite: a private assistant that runs entirely on your device, with no Microsoft account anywhere.
Quick verdict
Three sentences.
The short version, before the table. Copilot is the more integrated Microsoft product; Localyze.ai is the more private one and the one that keeps working in air-gapped offices, on flights, and outside the corporate tenant.
Copilot wins on integration
Native ties to Office documents and Outlook mail, deep Windows OS surfaces, the Edge sidebar, and GitHub-aware code suggestions inside your repos.
Who should switch
Enterprises with strict NDAs, regulated industries, legal teams, and privacy-conscious developers who do not want their drafts crossing tenant boundaries.
Feature by feature
The full breakdown.
Honest where Copilot wins. Honest where it doesn't.
| Localyze.ai | Copilot | |
|---|---|---|
| Runs entirely on-device | Yes | No |
| Works fully offline | Yes | No |
| Account required | No | Microsoft account |
| Data sent to vendor servers | None | Microsoft + OpenAI |
| Training on your chats | Never | Tenant-dependent |
| Pricing | $89 once · no subscription | Subscription with daily turn limits |
| Mobile native app | Android (Kotlin) | Android / iOS |
| Desktop native app | WinUI / SwiftUI / Qt6 | Windows shell |
| Model used | Gemma 3n E4B (open) | GPT-4 family (closed) |
| Open weights | Yes | No |
| Voice input privacy | Transcribed locally | Uploaded to cloud |
| Image input privacy | Read locally | Uploaded to cloud |
| Chat history location | Your device only | Microsoft servers |
| Telemetry / analytics SDKs | None | Yes |
| Custom system prompts | Yes | Limited |
| Office document automation | No | Yes |
| GitHub repo-aware coding | No | Yes |
Where Copilot genuinely wins
The honest part.
If your job lives inside Microsoft 365 all day, Copilot is built for you. A local assistant cannot rewrite a 40-tab Excel workbook in place, summarise a folder of Outlook threads, or autocomplete inside your private GitHub repos, and we are not going to pretend otherwise.
- Deep Office integration across Word, Excel, PowerPoint, and Outlook.
- GitHub Copilot code suggestions wired to your repos and pull requests.
- Windows OS-level features, taskbar surface, and the Edge sidebar.
- Enterprise tenant controls, conditional access, and single sign-on.
Localyze.ai is for the work that should not leave your laptop in the first place — privileged drafts, client material, regulated data — and for everyone who already pays Microsoft enough without handing them every prompt too.
FAQ
Is Localyze.ai a Microsoft Copilot replacement?
For private chat, voice questions, image questions, summarisation, and notes — yes, it covers the same daily ground. For Office automation and GitHub code suggestions, Copilot is still ahead.
Does Localyze.ai need a Microsoft account?
No. Localyze.ai needs no account at all, from Microsoft or anyone else. Install the app, open it, and start chatting — that is the entire flow.
Does Copilot send my prompts to Microsoft and OpenAI?
Yes. Copilot routes prompts through Microsoft tenant infrastructure and OpenAI's models. Localyze.ai routes nothing because inference runs on your own CPU or GPU.
Can Localyze.ai work without internet?
Yes. After the one-time ~4 GB model download, Localyze.ai works offline on planes, trains, and remote sites. Copilot requires a constant connection to Microsoft.