Speedify Transport Mode Overview

Speedify gives you control over the transport protocol (the method used to send your internet traffic through the Speedify tunnel) via Transport Mode settings. Choosing the right transport mode for your network conditions can help you get better speeds and a more stable connection. This article explains each available mode and when to use it.

Transport Modes

Auto

In Auto mode, Speedify automatically selects the best transport protocol based on your connection performance and other factors. This is the default setting and the best choice for most users. Unless you have a specific reason to change it, Auto is the mode to use.

UDP (User Datagram Protocol)

UDP offers the best performance on slow or unreliable connections. It's the recommended mode if you're gaming, live streaming, or using any other latency-sensitive application.

Unlike TCP, UDP doesn't wait to confirm that every packet arrived before sending the next one. This means Speedify can recover from lost packets more efficiently and keep performance higher on networks with high latency or packet loss.

TCP (Transmission Control Protocol)

TCP is a connection-oriented protocol that guarantees in-order delivery of data. If a packet is lost, TCP automatically resends it, making it highly reliable. On fast, stable networks, TCP can reach higher maximum speeds than UDP.

The tradeoff is that this reliability comes at a cost. If your connection already has high latency or packet loss, TCP's need to wait for and resend lost packets can slow things down. In those situations, Multi TCP or UDP are likely to perform better.

Multi TCP

Multi TCP opens multiple parallel TCP sockets at the same time instead of relying on a single connection. This improves performance over standard TCP, because if some sockets get stuck waiting to resend lost packets, others can keep sending data in the meantime.

Multi TCP is a good choice for very fast networks, or for networks with high latency or packet loss where standard TCP would stall out.

HTTPS (Hypertext Transfer Protocol Secure)

HTTPS runs on port 443, the same port used by standard web browsing. This makes it useful on restrictive networks that block or throttle internet traffic on other ports but still allow access to websites.

Because of the extra overhead involved, HTTPS is typically slower than the other transport options. Speedify treats it as a last resort, using it only when other protocols can't connect.