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Comparison

Mountain Duck vs ExpanDrive

Mountain Duck lands on Depends, and ExpanDrive lands on Worth it.

ExpanDrive

expandrive.com

Worth it
Confidence: Medium

Buy it if you juggle several cloud storages across Mac, Windows, or Linux . personal use is free and it mounts S3, SFTP, or SharePoint as a real drive.

Read the full report

Mountain Duck versus ExpanDrive
CompareMountain DuckExpanDrive
VerdictDependsWorth it
Best forFreelancers mounting S3/SFTP/B2 as a diskMulti-cloud jugglers (Drive + S3 + Dropbox)
Who it's not forAnyone happy with native Dropbox/Drive/OneDrive clientsSingle-cloud users . the provider's own free app already does this
PrivacyTwo high-severity 2025 CVEs around TLS certificate handling, since patched; no dedicated security page found.TLS everywhere, credentials in the OS keychain, OAuth-only sign-in; older builds had disclosed flaws, so run the current release.
Support qualityCapterra customer service score 4.0/5No support-quality evidence in sources
Public sentimentUsers love cloud storage appearing as a local disk, but stability complaints and the pricing-model switch split sentiment sharply.⁷Reviewers praise easy multi-cloud mounting and near-native speeds; Macworld found version 7 imperfect.
Biggest gotchaPricing model flipped: App Store v5 is subscription; a forum thread calls the switch 'actual scam'10Older builds have disclosed security issues . only the current release is patched.

Pick Mountain Duck when

  • Freelancers mounting S3/SFTP/B2 as a disk
  • Mac users juggling multiple cloud providers
  • Selective-sync and Cryptomator encryption users
  • Cyberduck fans wanting Finder access

When Mountain Duck is not a fit

  • Anyone happy with native Dropbox/Drive/OneDrive clients
  • Spotlight-reliant Mac users . no Spotlight integration
  • Teams moving huge datasets . large SFTP uploads report issues
  • Buyers who hate subscription licenses . the App Store edition is one

Pick ExpanDrive when

  • Multi-cloud jugglers (Drive + S3 + Dropbox)
  • Developers mounting SFTP or S3 servers
  • Cross-platform Mac/Windows/Linux setups
  • Anyone avoiding sync-client local clutter

When ExpanDrive is not a fit

  • Single-cloud users . the provider's own free app already does this
  • Teams over 10 users . pricing becomes unpublished Enterprise
  • Offline-first workflows . mounts stream, nothing stored locally
  • Plain-FTP-only environments handling sensitive data

Sources

  1. Mountain Duck official sitemountainduck.io
    official
  2. Mountain Duck Buy pagemountainduck.io
    official
  3. Known Issues . Cyberduck docsdocs.cyberduck.io
    official
  4. Mountain Duck Review . BestBackupReviewsbestbackupreviews.com
    review
  5. Mountain Duck for macOS Review . MacUpdatemacupdate.com
    review
  6. Mountain Duck Reviews . Capterracapterra.com
    review
  7. Mountain Duck Reviews . SourceForgesourceforge.net
    review
  8. Mountain Duck 5 Review . TheSoftware.Shopthesoftware.shop
    review
  9. Transmit 5 or Mountain Duck 4? . Reddit r/macappsreddit.com
    review
  10. Mountain Duck is actual scam . MacRumors Forumsforums.macrumors.com
    news
  11. GHSA-688c-vjrc-84rv . Weak hash for certificate fingerprintgithub.com
    security
  12. CVE-2025-41255 . TLS certificate handlingstrix.ai
    security
  13. Mountain Duck M1 issues . GitHub #11655github.com
    security
  14. Issues with large SFTP uploads . GitHub discussiongithub.com
    security
  15. ExpanDrive homepageexpandrive.com
    official
  16. ExpanDrive download and pricingexpandrive.com
    official