An Adobe Acrobat redaction alternative — built for bulk.
Adobe Acrobat Pro can redact a PDF — it'll even search for patterns like SSNs and phone numbers. But it's a desktop editor at heart, it can't detect names or addresses the way a model can, and it produces no tamper-evident record of what you removed. Lacuna does one thing: it adds ML detection on top of pattern search, reviews every span, removes them from the PDF's text layer, and logs every decision in a hash-chained tamper-evident audit log.
Adobe Acrobat Pro vs Lacuna, for redaction.
| Capability | Adobe Acrobat Pro | Lacuna |
|---|---|---|
| Built for | General PDF editing, forms, signing | Redaction, start to finish |
| Detection | Pattern & text search (SSN, phone, credit card, custom) | Pattern search + ML detection of names, addresses & other entities |
| Across many files | Manual per file (scripted batches via Action Wizard) | Upload a batch; review it all in one queue |
| Review workflow | Mark items, then apply | Every detected span shown in context — redact / keep / flag |
| Removes text from the PDF text layer | Yes (Redact tool) | Yes (byte-level) + a sanitization pass |
| Tamper-evident audit log | — | Hash-chained, one entry per decision |
| Runs in | Desktop app, per seat | The browser — nothing to install |
| Pricing | Per-seat subscription | Free tier; paid plans from $5/mo |
Where it actually matters.
Acrobat's search finds fixed formats — SSNs, phone numbers, anything you can write as a pattern. It can't find a name or address it wasn't told to look for. Lacuna adds an ML model that does, on top of the pattern pass.
Acrobat has no log of what you redacted. Lacuna writes every decision to a hash-chained tamper-evident audit log, so you can show what was removed and when without re-exposing it.
Acrobat Pro is a per-seat desktop subscription. Lacuna runs in the browser — open a tab, redact a batch, share the result.
When Acrobat is the right tool.
If you live in PDFs — editing, forms, signatures, the occasional one-off redaction — Acrobat Pro is a deep, mature tool, and Lacuna isn't trying to replace it as an editor. Reach for Lacuna when redaction is the job: many documents, detection that catches names and addresses, and a record you can stand behind.
Redact your first batch free.
Byte-level PDF redaction with a tamper-evident audit log — no card required.