Your spreadsheets stay under your control.
Excelfyio is built so the workbooks running your business are private, owned by you, and auditable — whether you run in the cloud or natively on Windows.
Security at every layer
Data ownership
Your workbooks and generated systems belong to you. Export anytime, delete anytime — nothing is locked in.
Encryption everywhere
Data is encrypted in transit (TLS) and at rest, with scoped access and least-privilege defaults throughout.
Bring your own AI keys
Use your own model provider. Your prompts and data are never used to train shared or third-party models.
Microsoft identity & SSO
Sign in with Microsoft and AuthFyio. Provision and de-provision through your existing directory.
Audit trails
Every analysis, fix, and generation is logged — who did what, to which workbook, and when.
Local processing
With Excelfyio Desktop, sensitive workbooks are analyzed locally on Windows and never have to leave the machine.
A transparent path for every workbook
No hidden copies, no silent training. Here's exactly what happens when you connect a workbook.
Connect
Upload or link via OneDrive. Access is scoped to your workspace only.
Analyze
Profiling runs in your chosen environment — local on Desktop, or your cloud workspace.
Generate
Output is your private app or dashboard, deployed under your account with rollback.
Control
Export or delete anytime. Every action is captured in the audit trail.
What we never do
- Train shared models on your data — your workbooks are never used to improve models for anyone else.
- Sell or share your data — we have no data-brokerage business, full stop.
- Make silent changes — stabilization edits are explicit, reversible, and logged.
What you always control
- Your AI provider & keys — bring your own on Pro and Enterprise.
- Where analysis runs — local on Desktop or in your cloud workspace.
- Retention & residency — custom policies and regions on Enterprise.