FTP vs. SFTP:
Key Differences, Security & When to Use Each (2026)

TL;DR: FTP (File Transfer Protocol) transfers files over TCP/IP using two unencrypted channels on ports 20 and 21. SFTP (Secure File Transfer Protocol) uses SSH to encrypt all data and commands through a single channel on port 22. FTP is faster to set up but transmits data in plaintext, making it unsuitable for sensitive data or regulated industries. SFTP is the standard for any transfer involving PII, financial records, or compliance-governed data. For Extract, Transform, and Load (ETL) workflows connecting to cloud data warehouses, SFTP is the correct choice.

Key Takeaways:

• FTP transmits data in plaintext over two channels (ports 20 and 21); SFTP encrypts everything over a single SSH channel on port 22.
• SFTP supports both username/password and SSH key authentication; FTP supports only username/password.
• FTP is not compliant with HIPAA, PCI-DSS, GDPR, or CCPA. SFTP meets all four frameworks.
• FTPS is not the same as SFTP. FTPS adds SSL/TLS on top of FTP; SFTP is a completely separate protocol built on SSH.
• For any ETL pipeline moving data to a cloud warehouse or external partner, SFTP is the correct choice.
• Integrate.io includes a native SFTP connector with automated scheduling, SSH key authentication, and direct delivery to Snowflake, Redshift, and BigQuery.

FTP vs. SFTP: Side-by-Side Comparison

What is FTP?

FTP (File Transfer Protocol) is a standard network protocol that transfers files between a client and server over TCP/IP using two separate channels, one for commands (port 21) and one for data (port 20), without encryption.

Invented in 1971, FTP transfers files from one computer to another via TCP/IP, the communication protocols that connect network devices on the internet. One computer user grants another user access to receive files from the FTP server (the "host"), and the recipient receives the shared files quickly.

FTP supports three data representations: 8-binary data, ASCII (7-bit), and EBCDIC (8-bit). It transfers files via three transmission modes: block, stream, and compressed.

Note on FTPS: Do not confuse FTP with FTPS (FTP Secure). FTPS adds an SSL/TLS encryption layer on top of traditional FTP. It is a middle ground between FTP and SFTP, but it is not the same as SFTP. See the full three-way comparison below.

What is SFTP?

SFTP (Secure File Transfer Protocol) is a network protocol that transfers files securely over a single SSH-encrypted channel on port 22, supporting both password and public key authentication.

The SSH File Transfer Protocol, introduced in the late 1990s, provides an alternative to conventional FTP. SFTP does not use TCP/IP. Instead, it transfers files via SSH, a client-server-based network protocol.

SSH lets the sending user control the recipient's device like a local computer. The recipient's device (the "client") connects to an SSH server. The SSH process resembles Secure Sockets Layer (SSL) but uses commands to execute data connections, and it encrypts both the commands and the data payload.

Key Features of FTP and SFTP

Features of FTP

• Uses TCP/IP communication protocols for data transfer.
• Supports three data representations: 8-binary data, ASCII (7-bit), and EBCDIC (8-bit).
• Transfers files via three transmission modes: block, stream, and compressed.
• Allows uploading and downloading of files to and from the FTP server.
• Utilizes two channels for data transmission.

Features of SFTP

• Uses the SSH network protocol for data transfer.
• Encrypts data during transfer, ensuring a higher level of security.
• Operates through a single channel for data transmission.
• Supports both username/password and public key authentication methods.
• Allows command execution and enhanced functionalities for uploading and downloading files.

Pros and Cons of FTP vs. SFTP

Pros of FTP

• Simple and quick way to transfer files.
• Capability to transfer multiple directories simultaneously.
• Time-tested and widely understood due to its long-standing history.

Pros of SFTP

• Enhanced security through data encryption during transfers.
• Utilizes a single channel, reducing potential security vulnerabilities.
• Offers authentication methods using cryptographic SSH keys or username/password.
• Firewall-friendly: single port (22) simplifies network configuration.
• Platform-agnostic: compatible with Windows, Mac, and other operating systems.

Cons of FTP

• Lacks robust security measures, making it difficult to comply with GDPR and CCPA and other frameworks. Unencrypted data transfer risks penalties for data governance non-compliance.
• Two-channel architecture introduces additional attack surface for intercepting sensitive data.
• Not compliant with most modern security standards and regulations.

Cons of SFTP

• SSH key management requires initial setup and ongoing administration.
• Encryption adds minimal processing overhead. For most modern systems and typical file sizes, the performance difference versus FTP is negligible.

FTP vs. SFTP vs. FTPS: What's the Difference?

These three protocols are frequently confused. Here is how they differ.

FTP transmits data in plaintext with no encryption. It uses ports 20 and 21 and two separate channels. It is the oldest and least secure of the three.

FTPS (File Transfer Protocol Secure) adds an SSL/TLS encryption layer on top of traditional FTP. It comes in two modes: explicit FTPS (STARTTLS) and implicit FTPS, which use different ports. FTPS encrypts the data channel but retains FTP's two-channel architecture and can be harder to configure through firewalls. See the Integrate.io FTPS connector for ETL use cases.

SFTP is a completely separate protocol built on SSH from the ground up. It uses a single encrypted channel on port 22 and supports key-based authentication natively. It is not an extension of FTP.

When would you choose FTPS over SFTP? If your organization already has FTP infrastructure and a vendor requires FTPS specifically, FTPS is a reasonable upgrade path. For new implementations, SFTP is the cleaner, more widely supported choice.

Compliance Mapping: FTP vs. SFTP

Protocol choice has direct compliance implications. FTP transmits data in plaintext, which disqualifies it from regulated data environments.

If your data pipeline handles patient records, payment data, or any personally identifiable information, FTP is not an option. SFTP satisfies the encryption-in-transit requirements across all five frameworks listed above.

When to Use FTP vs. SFTP

Use FTP when:

• Transferring files on a closed, trusted internal network with no external exposure.
• Working with legacy systems that do not support SSH and cannot be upgraded.
• Speed is the only priority and data sensitivity is zero.

Use SFTP when:

• Transferring any data over the public internet.
• Handling PII, PHI, financial records, or any data subject to HIPAA, PCI-DSS, GDPR, or CCPA.
• Connecting to cloud storage, data warehouses, or external partners.
• Your organization requires audit logs and key-based authentication.
• Running automated ETL pipelines, including SFTP-to-SFTP transfers between systems.
• Handling CSV files over SFTP as part of a data ingestion workflow.

If you need to configure SFTP for the first time, Integrate.io's documentation covers the full setup process.

Conclusion

SFTP is the clear choice for any data transfer involving sensitive information, public networks, or compliance requirements. Its SSH-based encryption, single-channel architecture, and flexible authentication make it the standard for modern ETL and data pipeline workflows.

FTP retains a narrow use case: internal, non-sensitive transfers on fully trusted networks. Outside that context, the risks of plaintext transmission outweigh any setup simplicity FTP offers.

For teams building data pipelines, the "When to Use SFTP" section above covers the full decision framework. The Integrate.io SFTP connector handles the infrastructure so your team can focus on the data.

FAQ: FTP vs. SFTP

Is SFTP always more secure than FTP?

Yes. FTP transmits data in plaintext; any intercepted packet is fully readable. SFTP encrypts both the data and the commands using SSH, making interception effectively useless without the decryption key. There is no scenario in which FTP is more secure than SFTP.

What port does SFTP use?

SFTP operates on port 22, the same port used by SSH. FTP uses port 21 for control commands and port 20 for data transfer. This single-port design makes SFTP significantly easier to configure through firewalls compared to FTP's two-channel setup.

Can I still use FTP in 2026?

FTP is technically functional but is not recommended for any transfer involving sensitive data or public networks. Most compliance frameworks, including HIPAA, PCI-DSS, and GDPR, effectively prohibit unencrypted FTP for regulated data. For internal, non-sensitive transfers on a closed network, FTP remains an option, but SFTP is the safer default.

What is the difference between SFTP and FTPS?

SFTP is a separate protocol built on SSH. FTPS is FTP with an SSL/TLS encryption layer added on top. Both encrypt data in transit, but they use different ports, authentication methods, and underlying protocols. They are not interchangeable. SFTP is generally preferred for new implementations due to its simpler firewall configuration and native SSH key support.

Does SFTP slow down file transfers?

Encryption adds a small processing overhead, but for most modern systems and typical file sizes the performance difference versus FTP is negligible. The security benefit far outweighs any marginal speed reduction.

How does Integrate.io support SFTP?

Integrate.io includes a native Integrate.io SFTP connector that supports both password and SSH key authentication, automated scheduling, and direct pipeline delivery to data warehouses like Snowflake, Redshift, and BigQuery. No custom scripting required. You can explore the full SFTP data integration process and available SFTP connectors in the Integrate.io documentation.

How Integrate.io Can Help

Embracing SFTP for data transfers elevates your ETL processes to a higher level of security and efficiency. Integrate.io's data pipeline platform is built to support and extend SFTP-driven workflows. Whether you're transferring files to data warehouses, interfacing with analytics platforms, or automating partner data exchanges, the platform provides a low-code ETL platform that handles the pipeline infrastructure.

The Integrate.io SFTP integration supports both password and SSH key authentication, automated scheduling, and direct delivery to Snowflake, Redshift, and BigQuery. For teams evaluating options, see the full list of top SFTP ETL tools and how Integrate.io handles secure file transfers.

Try Integrate.io free for 14 days with a 14-day free trial, or schedule a demo with a Solution Engineer to see SFTP pipeline automation in action.