ScanSign vs CamScanner: private by default vs cloud by default
CamScanner is the household name in mobile document scanning. ScanSign takes a structurally different approach — no account, no cloud upload, no watermark — built for people who treat documents the way they treat their passport photos.
The short version
Pick CamScanner if you want a brand-name scanner with built-in cloud storage, OCR-to-Word export and a paid plan that adds collaboration. It is the most mature consumer scanner on Android.
Pick ScanSign if you don't want your documents leaving your phone. Everything ScanSign does happens on-device. There is no login, no upload, no watermark on the free version, and the app is free to keep.
Feature-by-feature comparison
| Feature | ScanSign | CamScanner (free) |
|---|---|---|
| Account required to use | No — open and scan | Yes — phone/email signup |
| Cloud upload | Never — fully on-device | Default cloud sync |
| Watermark on free version | None | "Scanned by CamScanner" |
| Ads in the scanning flow | No ads | Yes |
| Page limit per document | Unlimited | Soft limits on free plan |
| Sign PDF with finger or stylus | Built in | Paid feature |
| WHITE filter (preserves stamps & signatures) | Yes — six filters total | B&W / colour magic |
| Works offline | Always | Limited without login |
| OCR (text recognition) | Not in v1.0 | Yes |
| Price | Free, no IAP in v1.0 | Free + paid Pro plan |
| Made by | One91 Network, Singapore | INTSIG Information, China |
Why "no account" matters more than it sounds
A document scanner sees your most sensitive paper: rental agreements, bank statements, ID cards, insurance forms, medical reports. Most users assume the scanner just makes a PDF — they don't notice that creating an account ties every scanned page to an identifiable user record, and the default cloud-sync setting silently copies that PDF to a server you don't control.
ScanSign was designed around a single rule: the document never leaves your phone unless you choose to share it. There is no signup screen because there is nothing to sign in to. No analytics SDK, no telemetry, no document-content telemetry. If you uninstall ScanSign, the documents are wiped from the device. There is no copy anywhere else.
Worth knowing: CamScanner has cleaned up significantly since its 2019 ad-malware incident on the Play Store, and current versions ship clean. The point of this comparison isn't past trust — it's that the architecture itself is cloud-first. Even when the code is clean, a hostile network, a leaked account, or a future privacy-policy change can affect documents that were uploaded by default.
Where CamScanner is genuinely better
ScanSign isn't trying to win every column. CamScanner has years of head start on:
- OCR. CamScanner's text recognition is fast and supports many languages. ScanSign v1.0 doesn't ship OCR yet — coming in v1.1.
- Team / cloud workflows. If you want a folder shared across colleagues and synced across phones, CamScanner Pro handles that out of the box. ScanSign is a personal tool.
- Export to Word / Excel. Convert-to-editable-document is a CamScanner staple feature. ScanSign exports PDFs and images.
If those features are core to your workflow, CamScanner remains the right tool. If they aren't, ScanSign's smaller surface area is the feature.
Where ScanSign wins
- Speed. Three taps from app icon to signed PDF: open → capture → sign. Most scans take under ten seconds.
- WHITE filter. CamScanner's "B&W" mode strips colour stamps and seals; ScanSign's WHITE filter cleans the paper to a clean sheet while preserving signatures, stamps and ink colour. This matters more than it sounds for contracts, government forms and notarised documents.
- No watermark, ever. No "Scanned by …" stamp on the bottom of free-version PDFs.
- Smaller app. ScanSign is under 12 MB. CamScanner is over 100 MB after first launch.
- No subscription. ScanSign v1.0 has no IAP. If a paid tier comes later it will be additive, not a paywall on existing features.
Who CamScanner is built for
CamScanner is built for the business user who needs a scanner that fits into a broader cloud workflow — share to colleagues, edit on a laptop, archive in Google Drive. The account, the cloud, and the ads on free are the trade-off for that workflow.
Who ScanSign is built for
ScanSign is built for the person standing at a counter, who has been handed a paper form and needs to send a signed PDF in the next minute. No new account. No "set up cloud sync". No watermark to crop out before sending. Just open, scan, sign, share.