SCP vs. SFTP: Which Secure File Transfer Protocol Should You Use?

If you’ve ever copied files between servers or sent sensitive data to a remote machine, you’ve probably come across SCP and SFTP. Both run on SSH, both encrypt your data in transit, and both get the job done. So what’s the actual difference, and does it matter which one you use?

Short answer: SFTP is the better choice for most people and most workflows in 2026. It gives you everything SCP does (secure, encrypted file transfer over SSH) plus remote file management, transfer resumption, and better error handling. SCP is faster in some cases, but it’s been officially flagged as outdated by the OpenSSH developers, and newer versions of the scp command actually use SFTP under the hood anyway.

That said, SCP still has a place in certain scripting and automation setups. Below, we’ll break down how each protocol works, where they differ, and how to decide which one fits your needs, whether you’re managing servers, transferring client deliverables, or just trying to move files without the headaches.

How Does SCP Work?

SCP stands for Secure Copy Protocol. It grew out of the old BSD Remote Copy Protocol (RCP) from the 1980s, with SSH layered on top to add encryption. In practical terms, SCP lets you copy files between a local machine and a remote host (or between two remote hosts) using a single command.

It’s non-interactive. You type your command, specify the source and destination, and SCP handles the rest. There’s no browsing directories, no renaming files mid-transfer, no pausing and resuming. It copies, and that’s it.

That simplicity is actually SCP’s main selling point. Because it doesn’t wait for packet-by-packet acknowledgements the way SFTP does, SCP can be noticeably faster, especially on high-latency networks. For quick, one-off file copies or scripted backup jobs, it gets the bytes moved with minimal overhead.

But speed comes with trade-offs. SCP can’t list directories, delete files, change permissions, or do anything beyond copying. If a transfer gets interrupted, you’re starting from scratch. And since 2019, the OpenSSH team has been clear that SCP is outdated and carries security risks that aren’t easily fixed, with Red Hat fully deprecating the protocol in RHEL 9.

How Does SFTP Work?

SFTP (SSH File Transfer Protocol, sometimes called Secure File Transfer Protocol) is a completely separate protocol from SCP, even though both use SSH for encryption. It was designed in the late 1990s as a proper replacement for FTP, built from the ground up with security in mind.

Unlike SCP, SFTP is interactive. Once you connect, you get a full set of commands for browsing directories, uploading and downloading files, renaming, deleting, and changing permissions on the remote server. It works more like a remote file manager than a simple copy tool.

Resume and Error Handling

One of SFTP’s biggest practical advantages is transfer resumption. If your connection drops mid-transfer, SFTP can pick up where it left off. SCP can’t do this, so you’d have to re-send the entire file.

SFTP also checks each packet during transfer, which adds a small amount of overhead but means corrupted or lost data gets caught and re-sent. For large files or unreliable connections, that reliability matters more than raw speed.

Cross-Platform Support

SFTP works across Windows, macOS, and Linux, and it’s supported by virtually every modern file transfer client, from FileZilla to WinSCP. SCP is primarily a Unix/Linux tool, and while it works on other platforms through third-party clients, SFTP has broader native support.

SCP vs SFTP: Which One Should You Pick?

Here’s how the two protocols compare on the things that matter most:

• Speed: SCP is generally faster for raw file copies, particularly on high-latency networks, because it skips packet acknowledgements. SFTP is slightly slower but more reliable.
• File management: SFTP lets you browse, rename, delete, and change permissions on the remote server. SCP only copies files.
• Transfer resumption: SFTP supports it. SCP does not. A dropped connection means starting over with SCP.
• Security: Both use SSH encryption. However, SCP has known vulnerabilities that are difficult to patch due to its older protocol design. SFTP is considered the more secure option going forward.
• Future-proofing: OpenSSH has deprecated SCP. Since version 9.0, the scp command defaults to SFTP internally. SCP as a protocol is on its way out.

For most teams and most use cases, SFTP is the right pick. If you’re running automated scripts where SCP is already embedded and working, there’s no urgent need to rip it out today, but any new workflows should default to SFTP.If your file transfers involve business file sharing and collaboration , the extra file management features in SFTP make a real difference day to day.

Why Does GDPR Matter for File Transfers?

For Irish and EU-based organisations, the protocol you choose is only part of the picture. Under GDPR, transferring personal data requires encryption in transit, access controls, and audit trails showing who received what and when.Both SCP and SFTP provide encryption through SSH, but SFTP’s logging and access management features make it easier to demonstrate compliance.

Where things get complicated is data residency. If you’re using SCP or SFTP to send files to a server hosted outside the EU, you need to make sure appropriate safeguards are in place for that international transfer. Hosting your file transfers within the EU simplifies compliance significantly.

This is where purpose-built platforms can save time. Rather than configuring SSH servers, managing keys, and handling GDPR paperwork yourself, a platform like CloudExpress builds GDPR-aligned controls into the sending workflow with EU-hosted infrastructure by default. Recipients don’t need accounts, you get download tracking and delivery notifications, and the entire process stays within the EU.

When Do You Still Need SCP or SFTP Directly?

Not every file transfer scenario calls for a web-based platform. If you’re a sysadmin managing server backups, deploying code to production, or syncing directories between machines, SFTP (or rsync, its close cousin) is still the go-to tool.These are server-to-server or developer workflows where command-line access and automation matter more than a polished recipient experience.

But if you’re sending deliverables to clients, sharing sensitive documents with external partners, or transferring files where you need a clear record of who downloaded what, the overhead of managing SSH keys and server access starts to outweigh the benefits. That’s the gap where secure file delivery platforms sit, giving you the encryption and compliance controls without requiring recipients to have any technical setup.

Whether you stick with SFTP on the command line or move to a managed platform depends on your workflow. What matters is that SCP, for all its speed, is yesterday’s protocol. SFTP is the standard now, and for good reason. If you’re still defaulting to SCP out of habit, it’s worth making the switch before your tools make the decision for you.