/ləˈkjuːnə/ · an unfilled space; a gap
The space where a secret
used to be.
On-device AI that finds and redacts personal information from your documents. No uploads. No cloud. Just privacy.
Personal information replaced with ████ redaction blocks
Your documents never leave your Mac.
Lacuna runs a local AI model directly on your Apple Silicon chip. No internet connection required. No data sent to servers. No third parties involved. Ever.
No Cloud
Zero network calls after the one-time AI model download. Works completely offline.
No Tracking
No analytics, no telemetry, no usage data collection. Your privacy is absolute.
No Third Parties
Your sensitive documents are never shared with OpenAI, Google, or any other service.
Intelligent PII Detection
Powered by an on-device large language model that understands context, not just pattern matching.
And more—including nationality, gender, religious affiliation, and demographic identifiers.
Works with your documents
Drag and drop files directly onto Lacuna. Text is extracted automatically.
PDF Documents
Word Documents
Plain Text
Markdown
Images (OCR)
Photos (OCR)
Three steps to privacy
Drop
Drag any document onto Lacuna or use ⌘O to open.
Analyze
On-device AI scans for personal information in seconds.
Copy
Paste redacted text anywhere or save as a new file.
Lacuna uses AI to detect personal information, which is approximately 95% accurate. AI models are not infallible and may miss some information or incorrectly identify text as PII. Always review redacted documents before sharing. Lacuna provides no guarantees and accepts no liability for any information that may be missed or incorrectly redacted.