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Local-First Processing

What "local-first" means​

Zeno processes your documents in your browser, on your device, whenever possible. Your documents don't leave your computer unless you explicitly choose advanced features.

How it works​

Step 1: You upload a document​

The file stays in your browser's memory.

Step 2: Processing happens locally​

Zeno reads the document using your device's processing power. This happens in your browser - nothing is sent to any server.

Step 3: Only metadata is saved​

Zeno saves information like:

  • Date and amount
  • Counterparty name
  • Document type
  • VAT number (if found)

Your original document:

  • Stays on your device
  • Is never sent to Zeno's servers (unless you use advanced features)
  • Can be deleted from your device anytime

What stays local​

Always stays on your device:

  • Original document files
  • Document images and scans
  • Full text content
  • Any personal information in documents

What Zeno saves (with your permission):

  • Extracted information (dates, amounts, names)
  • Document metadata (type, status, period)
  • VAT validation results (valid/invalid/unknown)
  • Your confirmations and reviews

When data might leave your device​

Only with your explicit permission:

Advanced processing​

If a document is complex and local processing can't extract everything, you can choose to use cloud processing. This:

  • Requires your explicit consent
  • Uses more powerful analysis
  • May use subscription credits
  • Sends the document to Zeno's secure servers

You'll always see:

  • A clear option to enable this
  • What it will do
  • That it's optional

VAT validation​

When Zeno finds a VAT number, it checks if it's valid using official European databases. This:

  • Happens automatically
  • Only sends the VAT number (not your document)
  • Uses official VIES service
  • Shows you the result

Exports​

When you export your registry, you choose where it goes:

  • Download to your computer (stays local)
  • Export to Google Sheets (requires Google Drive consent)
  • Share with your accountant (you control who sees it)

Your control​

You decide:

  • Which documents to upload
  • Whether to use advanced processing
  • Where exports go
  • Who has access to your account

Zeno never:

  • Uploads documents without your action
  • Shares your data without permission
  • Processes documents in the cloud by default
  • Keeps documents after you delete them

Why local-first matters​

Privacy: Your sensitive financial documents stay on your device.

Speed: Processing happens instantly - no waiting for uploads.

Control: You see exactly what's happening and when.

Security: Less data transmission means less risk.

Common questions​

Does this work offline?​

Partially. You can upload and process documents offline, but:

  • VAT validation needs internet
  • Saving to your account needs internet
  • Exports need internet

What if my device is slow?​

Local processing uses your device's power. If it's slow:

  • Processing might take longer
  • You can still use advanced cloud processing (optional)
  • Results are the same, just takes more time

Can I trust local processing?​

Yes. Local processing:

  • Uses the same technology as cloud processing
  • Produces the same quality results
  • Is tested and verified
  • Follows the same rules

What happens to my documents?​

After processing:

  • Original files can stay on your device
  • Extracted information is saved to your account
  • You can delete originals anytime
  • Zeno doesn't keep copies of your files

What's next​