Send nothing personal.
Use any AI.
Keep private data local.
SYNSA Edge protects names, emails, phone numbers, IDs, accounts, and addresses before you send text to an AI tool. Review everything first, then restore the original details locally when the AI responds.
Built by Synsa - the Intelligent Due Diligence Platform
How it works
Three steps. Two clicks. Zero data leaves your device.
Drop a document, confirm you want to process it, and SYNSA Edge checks private details locally before creating a protected copy.
Drop your document here
PDF, DOCX, XLSX, PPTX, CSV, TXT, PNG, JPG, and more
Original Document
Dear Sarah Mitchell,
We confirm receipt of your quarterly review for Meridian Partners Ltd, registered at 42 King Street, London EC2V.
Please reach us at +44 20 7946 0958 or s.mitchell@meridian.co.uk.
IBAN: GB29 NWBK 6016 1331 9268 19
Protected Copy
Dear [PERSON_001],
We confirm receipt of your quarterly review for [ORG_001], registered at [LOCATION_001].
Please reach us at [PHONE_001] or [EMAIL_001].
IBAN: [ACCOUNT_001]
Paste the AI response back into SYNSA Edge. It uses your private key file to restore the original details locally.
AI Response
Summary for [PERSON_001]:
The quarterly review for [ORG_001] at [LOCATION_001] shows total revenue of $245,000. All documents are in order. Contact via [EMAIL_001] for follow-up.
Restored Output
Summary for Sarah Mitchell:
The quarterly review for Meridian Partners Ltd at 42 King Street, London EC2V shows total revenue of $245,000. All documents are in order. Contact via s.mitchell@meridian.co.uk for follow-up.
Private details SYNSA Edge helps protect
Names
People and honorifics
[PERSON_001]
Organizations
Companies and institutions
[ORG_001]
Addresses
Locations and postal codes
[LOCATION_001]
Emails
Email addresses
[EMAIL_001]
Phones
Phone numbers
[PHONE_001]
Accounts
Bank accounts and IBANs
[ACCOUNT_001]
IDs
Tax, VAT, and private IDs
[TAX_ID_001]
Your data never leaves your device.
It masks your data before any AI sees it. When the response comes back, it restores everything, exactly as it was.
Your document
Dear Sarah Mitchell,
Quarterly review for Meridian Partners Ltd at 42 King Street, London EC2V.
Contact: s.mitchell@meridian.co.uk
IBAN: GB29 NWBK 6016 1331 9268 19
Your private key file stays on your device
Only protected text crosses this line
What the AI sees
Dear [PERSON_001],
Quarterly review for [ORG_001] at [LOCATION_001].
Contact: [EMAIL_001]
IBAN: [ACCOUNT_001]
Works with every AI
Zero personal data reaches the AI
AI responds
AI responds
AI responded with
Summary for [PERSON_001]: The filing for [ORG_001] is complete...
Restored
Summary for Sarah Mitchell: The review for Meridian Partners Ltd is complete...
< 1s
Startup time
Built-in
Privacy checks
100%
Local processing
0
Accounts needed to process
Works across multiple languages.
English and German currently have the strongest tuning. French, Spanish, Italian, and Arabic are supported, with review recommended before sharing protected output.
Strongest tuning
Strongest tuning
Supported with review
Supported with review
Supported with review
Supported with review
Multilingual support helps you protect everyday documents across markets, while keeping the review step clear before you create a protected copy.
Your data doesn't leave. Period.
Built for professionals who take data privacy seriously.
Offline by design
All processing happens locally - no data leaves your device.
Private key stays local
Keep your private key file private because it contains the original values needed to restore protected text.
No account needed
No account needed to process documents. The download flow may ask for an email to deliver the app and license.
Zero telemetry
We don't collect usage data or crash reports. We literally cannot see what you do.
Only share the protected copy
The protected copy is safe to send to an AI tool. Your private key file is not shareable.
Local license
Your license is stored locally. Document processing still happens on your device, and no document content is sent to Synsa.
Privacy-first before compliance claims.
SYNSA Edge helps reduce exposure before AI use, while keeping review and legal obligations in your hands.
“Don’t train on my data” is not the same as
“my data never reaches your servers.”
SYNSA Edge keeps document processing local before you choose what to share.
Built for professionals
See how SYNSA Edge fits into real workflows.
Run Steuerbescheide through any AI for summaries without exposing client names or Steuernummern.
Review contracts with AI without exposing real party names. Keep private details local before sharing a protected copy.
Analyze reports with your preferred AI tool after reviewing and protecting names, accounts, and addresses.
Use AI tools with client data without breaking client trust.
Simple pricing
Start free. Add Pro for personal use, or roll out Edge across your organization.
Basic
No account needed to process documents.
- 10 protected documents total
- Local masking and restore workflow
- Review before creating a protected copy
- All supported document formats
- No account needed to process documents
Pro
Unlimited protected documents.
- Unlimited protected documents
- All supported languages
- Priority updates
- Local license activation
- Same local-first privacy approach
Cancel anytime
Enterprise
For legal, compliance, and security teams making AI use safer at work.
- Team licenses for approved AI use
- Local-first document processing
- AI privacy training support
- Rollout guidance for legal teams
- Procurement and invoicing support
For due diligence teams
The specialist platform behind Edge.
- Structured due diligence workflows
- Document intelligence
- Collaboration and review
- Decision support
For legal officers: AI use is already happening.
SYNSA Edge gives employees a safer way to use the AI tools they already reach for. Make it part of AI privacy training: review private details, create a protected copy, share only that protected text, and keep the private key file on the device.
Frequently asked questions
Does SYNSA Edge send my data anywhere?
No document content is sent to Synsa. Processing happens locally on your device. You decide what protected output to share with an AI tool.
What file formats are supported?
PDF, DOCX, DOC, XLSX, XLS, CSV, PPTX, PPT, TXT, RTF, HTML, Markdown, and images (PNG, JPG, TIFF, BMP) via OCR.
Which AI tools can I use with the protected copy?
Any tool that accepts text input, including ChatGPT, Claude, Gemini, Copilot, Perplexity, and local AI tools. Only the protected copy is safe to send to an AI tool.
What private details does SYNSA Edge look for?
SYNSA Edge looks for names, emails, phone numbers, addresses, accounts, IDs, and similar private details. It also includes financial-document safeguards and false-positive checks, especially for English and German documents. Always review detected details before creating a protected copy.
What happens if an AI tool changes the protected text?
Paste the response back into SYNSA Edge and use restore text. The app uses your private key file to restore the original details locally. If anything looks unusual, review the result before using or sharing it.
Is the free tier really free?
Yes. Free includes 10 protected documents total. Upgrade to Pro for unlimited protected documents.
Can I use this for GDPR compliance?
SYNSA Edge can help reduce exposure by keeping personal data local before AI use, but it does not guarantee compliance. You remain responsible for review and legal obligations.
How is this different from "anonymisation" tools?
Most anonymisation tools permanently remove or scramble private details. SYNSA Edge is reversible: create a protected copy before sending text to an AI tool, then restore the original details locally when the response comes back.
Why not just use an AI tool's built-in privacy mode?
Because "don't train on my data" is not the same as "my data never reaches your servers." Even with opt-out settings, your documents still travel to and are processed on third-party infrastructure. SYNSA Edge keeps processing on your device in the first place.
Is my private key file safe to share?
No. Keep the private key file private. It contains the original values needed to restore protected text. Only the protected copy is safe to send to an AI tool.
Which languages are supported?
SYNSA Edge supports English, German, French, Spanish, Italian, and Arabic. English and German currently have the strongest tuning. Always review detected details before sharing protected output.
Which operating systems are supported?
Use the download form to choose macOS or Windows. The site suggests an installer based on your browser, and you can change the operating system before requesting the download link.
Built by Synsa
Working in due diligence?
SYNSA Edge is built for anyone who wants to use AI without exposing private data.
For due diligence teams, Synsa goes further: structured review workflows, document intelligence, collaboration, and decision support for complex transactions.
Download SYNSA Edge.
Up and running in under 5 minutes.
Choose your operating system, enter your email, and get the right download link. No spam, no newsletters. Just the app.
We only use your email to send the download link. v1.0.8
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Platforms
macOS, Windows
GPU
Not required
Internet
First launch only