Cyberduck

Cyberduck is a free, GPL-licensed browser for servers and cloud storage on macOS and Windows. It connects to protocols and services including FTP, SFTP, WebDAV, SMB, OpenStack Swift, Google Cloud Storage, Amazon S3, Azure, Backblaze B2, OneDrive, SharePoint, Google Drive, Box, and Dropbox. Users can upload and download by drag and drop, transfer directory trees, resume transfers, or copy files between servers. Directory synchronization previews affected files before action. Cyberduck can open server-side text or binary files in an external editor, and copy or open HTTP URLs; S3 support includes CDN and pre-signed URLs. Cryptomator integration offers client-side encryption with protected filenames and individually encrypted files. SFTP supports public-key and two-factor authentication, and passwords are kept in the system Keychain. The software requires no account or registration. The maker lists a personal registration key at $10 a month as a minimum contribution shown by the vendor; a separate registration key contribution is $10, paid once.

Cyberduck offers file transfer and synchronization across many protocols, with encryption and authentication options. Check protocol-specific limits before relying on modification-date retention.

Cyberduck suits people who move or synchronize files across servers and cloud storage from a Mac or Windows computer. Its protocol coverage and external-editor support may also suit users managing remote files through existing tools.

Cyberduck is a libre file-transfer and cloud-storage browser for macOS and Windows, aimed at people who move files among varied servers and cloud providers. It is strongest as a broad, open-source hub for transfers, synchronization and server-side file work, while protocol-specific workflows may need a more focused client.

The free edition is fully usable without an account, and a registration key mainly removes the donation prompt rather than unlocking a separate feature set. Check your protocol and timestamp requirements before making it the center of an automated workflow.

Overview

Cyberduck combines traditional server access with connections to object storage and consumer cloud services. FTP, SFTP, WebDAV and SMB sit alongside OpenStack Swift, Google Cloud Storage, Amazon S3, Azure and Backblaze B2. OneDrive, SharePoint, Google Drive, Box and Dropbox are also supported, along with other services. That breadth is valuable when projects span several environments, because one application can cover otherwise unrelated endpoints.

It is GPL-licensed, with source code available on GitHub. The maker says the application has no backdoors and requires no registration or account. Those properties make it appealing to readers who prefer inspectable software and local control over credentials.

Key features

Transfers and automation

Drag-and-drop uploads and downloads keep routine exchanges direct, while recursive directory transfers handle whole folder trees. Resumable transfers are useful when a large copy is interrupted, and direct server-to-server copying can avoid routing data through the local machine. Transfer automation is supported, but scheduled transfers are not, so Cyberduck is a poor match for jobs that must start automatically at a fixed time.

Synchronization and editing

Synchronization compares local and remote directories and previews the files that would be affected before changes are made. That preview provides a practical review step before a potentially broad update. Cyberduck can also open text or binary files on a server in an external editor of your choice, which suits users who want to edit in an established desktop tool rather than a built-in editor.

Sharing and security

The application can copy or open HTTP URLs, and S3 workflows include CDN and pre-signed URLs for controlled sharing. Cryptomator integration adds client-side encryption, including encrypted filenames, obfuscated directory structures and individually encrypted files. SFTP supports strong ciphers, public-key authentication and two-factor authentication. Passwords are stored in the system Keychain, while certificates use Keychain trust settings. Modification dates cannot be retained for every protocol, an important limitation for archival or synchronization processes that depend on timestamps.

Desktop integration and support

Finder integration, Windows notifications, Bonjour discovery and system protocol handlers make connections fit into each operating system rather than remaining isolated inside the app. Help comes through community support, documentation, a public bug tracker and [email protected]. Cyberduck CLI is available for Mac, Windows and Linux for command-line use.

Pricing

The free plan is the sensible choice for anyone who needs the software itself and does not mind the donation prompt. The monthly key suits someone who wants ongoing support through contributions while using several computers; the one-time key is better for a personal, non-shareable installation with no recurring charge. Neither paid option is presented as a separate tier with additional transfer or protocol capabilities.

Platforms

Desktop downloads support Windows 10 64-bit or later and macOS 10.13 or later, including Intel and Apple M1 Macs. The command-line client is also available for Mac, Windows and Linux, extending automation beyond the graphical applications.

Who it's for

Cyberduck fits freelancers, administrators and teams handling a mixture of FTP/SFTP servers, WebDAV or SMB shares, object-storage buckets and consumer cloud accounts. It is particularly compelling for open-source users who want no account requirement, Keychain-backed credentials and optional client-side encryption. Readers whose priority is reliable scheduled execution, or whose process depends on preserving modification dates on every endpoint, should look elsewhere.

Pros and cons

• Pro: Broad protocol and cloud coverage reduces the need for separate clients.
• Pro: Resumable, recursive and server-to-server transfers cover demanding copy jobs.
• Pro: Synchronization previews affected files before action, reducing surprises.
• Pro: SFTP authentication, Keychain storage and Cryptomator integration provide substantial security options.
• Con: There is no built-in scheduling, limiting unattended, time-based workflows.
• Con: Modification-date retention varies by protocol, which can undermine timestamp-dependent sync or archival routines.
• Con: Paid keys primarily remove the donation prompt, so they offer little reason to pay if that prompt is acceptable.

Alternatives

Choose Filestash if you want a freemium client spanning web, mobile, desktop and self-hosted deployments, with a Hobby plan for up to three users and a Self Served plan at $50 a month.

Monsta FTP is a better fit for a free, self-hosted web client focused on FTP and SFTP/SCP transfers.

Pick FTPManager Pro when iOS-device transfers, an integrated FTP server and built-in text editing matter more than broad cloud coverage.

FileZilla Client is a straightforward free choice for FTP, FTPS and SFTP on Linux, macOS and Windows.

Windows users wanting a free open-source client with SFTP, FTP, FTPS, SCP, WebDAV and S3 can choose WinSCP.

CrossFTP offers free and paid editions for Linux, macOS and Windows.

ExpanDrive is worth considering for personal use across up to 10 users or devices per year, with support for 15 cloud services and protocols on its free plan.

FilePort Pro suits browser-based sharing where a free plan's 4 GiB transfer-size cap and two concurrent sessions per IP are acceptable.

For protocol-focused comparisons, see the SFTP Client Software, FTP and SFTP clients and WebDAV Client Software lists.

Verdict

Choose Cyberduck if you need one open-source application to connect to many server and cloud types, with strong transfer fundamentals, synchronization previews and optional encryption. Look elsewhere if scheduled transfers are essential, if every protocol must preserve modification dates, or if you want a paid plan that adds substantial capabilities beyond the free software.