Is Bucketeer a Mountain Duck alternative?

For S3 and Azure Blob Storage on the Mac, yes, if you also want a browser window and sync jobs. Mountain Duck covers more protocols and runs on Windows.

How do both apps handle edit conflicts?

Mountain Duck creates a duplicate with the time in its name. Bucketeer saves your version next to the original as a conflict copy named with the date. Neither overwrites the newer server version.

Do both apps use the File Provider of macOS?

Mountain Duck uses it in its Integrated mode. Bucketeer uses the File Provider extension for Mount as Drive, which needs macOS 14.1 or later.

Bucketeer vs. Mountain Duck, cloud storage in Finder compared

Name: Mountain Duck
Author: iterate GmbH

Mountain Duck by iterate GmbH mounts server and cloud storage as a disk in Finder and in Windows File Explorer, with offline files and background upload. It supports S3, Azure Blob Storage and many other protocols. Bucketeer combines a browser window for S3 and Azure with Finder drives, sync jobs and watch folders on the Mac.

The short answer

Choose Mountain Duck if Finder is where you want to work, across many protocols and on Windows too, with offline files.
Choose Bucketeer if you want a browser window for S3 and Azure with dashboards, metadata and an activity log, plus Finder drives and scheduled sync jobs.
Both use the File Provider system of macOS for Finder integration and both make a conflict copy when a file changed on both sides.

Bucketeer and Mountain Duck side by side

As of November 2026. Mountain Duck from its vendor's official pages (see sources), Bucketeer from its documentation. Not documented means the vendor's pages do not say, not that the feature is missing.
	Bucketeer	Mountain Duck
Type of product	Native Mac app for object storage: browser, transfers, Finder drives and sync in one app	App that mounts server and cloud storage as a disk in Finder and Windows File Explorer
Platforms	Mac only, macOS 14 or later (Mount as Drive needs macOS 14.1)	macOS 13 or later according to the vendor (the Mac App Store listing names macOS 15.0 or later) and Windows
Where to get it	Mac App Store only	Direct download, Mac App Store and Windows Store
Pricing model	App from the Mac App Store; Bucketeer Pro is a one-time in-app purchase, no subscription	Licence per user for one major version, with a trial; in the Mac App Store an in-app purchase
Amazon S3 and S3-compatible storage	Amazon S3, presets for Cloudflare R2, Backblaze B2, Wasabi, DigitalOcean Spaces, Storj and Civo, plus any S3 endpoint such as MinIO	Amazon S3 and S3-compatible storage; Backblaze B2 as its own protocol
Azure Blob Storage	Yes, with its own Azure backend	Yes
FTP, SFTP, WebDAV and other services	No, object storage only	Yes, among them FTP, SFTP, WebDAV, SMB, Google Drive, Dropbox, OneDrive and Box
Storage in Finder	Yes, Mount as Drive through the File Provider extension (Bucketeer Pro); not for encrypted buckets	Yes, the core of the product; Integrated mode uses File Provider on macOS
Sync	Sync jobs that copy, move or mirror bucket to bucket across providers or folder to bucket; by hand, at launch, on a schedule or on folder change; watch folders (Bucketeer Pro)	Smart Synchronization with offline files and background upload; no scheduled folder sync
Editing in other apps	Open and Open With; every save is uploaded, a conflict copy is made if the server version changed	Files open from the mounted volume in any app; changes are uploaded
Client-side encryption	AES-256-GCM per bucket on the Mac, key in the macOS Keychain	Yes, Cryptomator vaults
Share links	S3 presigned URLs and Azure SAS links	Signed and expiring links for S3, Azure, Backblaze B2 and others
Object versions	List, restore and delete object versions	Yes, revert previous versions in versioned S3 buckets
Metadata and headers	HTTP headers, user metadata and tags; storage class shown; auto-tagging rules	Info window for permissions, ACLs and metadata
Automation	Shortcuts and Siri actions, bucketeer:// deep links, Spotlight for object names	Mount from the command line by opening a bookmark file

Where Mountain Duck is ahead

Many protocols in Finder, from SFTP and WebDAV to Dropbox and Google Drive.
Windows support with the same licence model.
Offline files you can keep on the Mac and sync back later.
Cryptomator vaults, also readable by other Cryptomator apps.

Where Bucketeer is ahead

A full browser window for S3 and Azure with Quick Look, search and drag and drop.
Sync jobs and watch folders that run on a schedule or when a folder changes.
Bucket dashboard, auto-tagging rules, activity log and trash.
Shortcuts and Siri actions and bucketeer:// deep links.

Bucket dashboard with object count, total size and the list of the largest objects — Screenshots show demo data.

Bucketeer and Mountain Duck compared