Speedify Secures Your Internet and Gets You Faster Uploads and Downloads
A VPN tunnel is the encrypted path your data takes between your device and a VPN server. Each piece of data is wrapped up so nobody along the way (your internet provider, the coffee shop network) can read what you are doing.
An ordinary tunnel travels on one internet connection, so whatever that internet connection does, the tunnel does too. Speedify, an app that encrypts your traffic like a VPN, builds its tunnel over Wi-Fi, 4G/5G cellular, Ethernet, Starlink and satellite internet connections at the same time. That extra speed and failover needs two or more connections; over a single connection, a Speedify tunnel works like any VPN tunnel and can be a little slower than no VPN at all.
Speedify is a VPN that adds failover and faster uploads and downloads
This guide walks through how a VPN tunnel is built, why most tunnels slow you down, and how a Speedify tunnel keeps traffic private while uploads and downloads stay fast.
Understanding VPN Tunnel Architecture
A VPN tunnel is essentially an encrypted data pathway established between your device and a VPN server, creating a secure route through which all your internet traffic flows. This tunnel operates at the network layer, encapsulating your original data packets within additional headers and encryption protocols before transmission across public networks.
The tunneling process involves several critical components working in tandem. When you initiate a connection, your device and the VPN server perform a cryptographic handshake using protocols like SSL/TLS to establish secure communication parameters. The data transmitted through the tunnel is encrypted using a specific protocol, transforming the information into a coded format known as “ciphertext.”
This encapsulation process creates multiple layers of protection, similar to placing a sealed envelope inside another sealed envelope. Your original IP packet becomes the payload, wrapped in encryption, then further encapsulated with VPN protocol headers, and finally transmitted using the underlying network protocol.
Full Tunnel, Split Tunnel and How Secure a VPN Tunnel Is
A full tunnel VPN sends all of your traffic through the encrypted tunnel. A split tunnel VPN sends only some traffic through the tunnel and lets the rest go straight to the internet, outside the encryption. Speedify’s version of split tunneling is called Bypass: it sends chosen services, such as a streaming app, outside the tunnel while everything else stays encrypted.
A VPN tunnel is as secure as its encryption. Speedify’s tunnel uses DTLS 1.2 with AES-256-GCM or ChaCha20-Poly1305, built on Google’s BoringSSL. The tunnel ends at the VPN server, where your traffic is decrypted and sent on to the website, so the tunnel protects you from the local network and your internet provider, not from the site you visit.
To use a VPN tunnel, install a VPN app, sign in and connect; the app builds the tunnel for you. Speedify has a free tier with 5 GB per month when you create a free account (Linux needs a paid plan).
Modern VPN Protocols: Performance vs. Security Trade-offs
The choice of VPN protocol affects both the security and the speed of your tunnel. WireGuard, OpenVPN and IKEv2/IPsec are the most popular VPN protocols and the usual choices to stay safe online. Speed is where they differ.
OpenVPN remains the standard for cross-platform compatibility and security. OpenVPN authenticates connections using SSL/TLS and usually encrypts data with AES-256. That flexibility comes at the cost of processing overhead, which shows most on slower devices.
WireGuard is the newest of the three, built on a fixed set of modern cryptography: Curve25519 for key exchange and ChaCha20-Poly1305 for encryption and message authentication. Its small codebase makes it fast and easy to audit.
IKEv2/IPsec excels in mobile environments because it reconnects quickly and is built into most operating systems, which suits people who often switch between Wi-Fi and cellular networks.
IPsec is also the usual protocol for site-to-site VPN tunnels, the kind network admins set up between two offices, or between an office network and a cloud network such as AWS or Azure, so the two networks can reach each other privately. Speedify is not that kind of tunnel: it protects the traffic of the device or router running it, and it does not connect you to a company network.
Although these protocols keep you safe online, they usually slow down your internet connection. The next section explains why.
VPN Performance Paradox: Why Most VPNs Slow You Down
Traditional VPN implementations inherently introduce latency and reduce bandwidth through several mechanisms:
Encryption Overhead: Every packet requires computational resources for encryption and decryption, creating processing delays proportional to your CPU capabilities and the chosen cipher strength.
Routing Inefficiencies: Traffic must traverse additional network hops to reach the VPN server before being forwarded to its final destination, often resulting in suboptimal routing paths.
Single Connection Limitations: Most VPNs rely on a single encrypted tunnel, creating a bottleneck that cannot exceed the capacity of your primary internet connection.
Protocol Overhead: VPN protocols add header information to each packet, reducing the effective payload size and requiring additional transmissions for the same amount of data.
Combining Internet Connections for a Faster, Steadier VPN Tunnel
Traditional VPN tunnels are limited to one internet connection. Combining internet connections removes that limit, for both speed and reliability.
Speedify’s technology for combining internet connections and its own VPN protocol let you combine Wi-Fi, 4G/5G cellular, Ethernet, Starlink, DSL and satellite internet connections into one faster, more reliable connection.
This approach addresses the fundamental performance limitations by:
Aggregating Bandwidth: Instead of being limited to one connection’s capacity, combined connections can approach the total throughput of all of them; Speedify says up to 95% of their combined upload and download speed.
Providing Redundancy: If one connection experiences packet loss or latency spikes, traffic can be dynamically redistributed across remaining channels without interrupting the session.
Optimizing Path Selection: Different types of connections (fiber, cable, cellular) may have varying performance characteristics for different types of traffic, allowing intelligent routing decisions.
How Speedify Gets Faster Upload and Download Speeds Through One Tunnel
Speedify’s own VPN protocol runs one encrypted tunnel to a Speedify server over all of those internet connections at once, so websites and apps see a single connection with one public IP address.
Speedify spreads packets across the available connections while keeping your sessions open. With two or more connections, uploads and downloads can be faster than your main connection alone would give you.
If you’re running a satellite connection, see the best VPN for Starlink for why a VPN that combines connections beats a single-tunnel VPN on a connection with handoff jitter.
Where a Speedify Tunnel Helps: Streaming, Calls, Downloads and Gaming
- Live Streaming: Combined connections provide the bandwidth headroom and failover that uninterrupted broadcasts need
- Video Conferencing: Multiple channels ensure call quality remains stable even if one connection degrades
- Large File Transfers: Spreading a transfer across combined connections can cut download times
- Gaming: Fewer disconnects and less packet loss, and in Redundant Mode your ping follows whichever connection is faster at that moment
Technical Details: How the Speedify Protocol Spreads Packets
Speedify goes beyond simple load balancing. It dynamically spreads individual packets amongst your available internet connections to improve reliability and speed for any Internet activities, including live streaming or torrenting.
First, TCP (Transmission Control Protocol) is one of the transport protocols used in network and Internet communications. It basically divides the information being sent and received into chunks, adds a TCP header and creates a TCP segment. Then, that TCP segment is being sent over the network, following a path of “hops” until it reaches the destination. For why it has lasted so long, watch why TCP is still the top internet protocol.
Speedify used to open one TCP socket over each internet connection it used, for example one over Wi-Fi and one over cellular. With the newer protocol, Speedify opens several sockets over each connection, for example 8 over Wi-Fi, 8 over cellular and 8 over Ethernet.
If there’s packet loss on one of the TCP sockets, only the network packets being sent over that socket are delayed, as the TCP protocol will keep trying to send those, while the other sockets can continue sending other packets. This will minimize the negative effects of high latency and packet loss on connection performance, including the cases when you use Speedify with a single Internet connection.
In plain words
If each connection that Speedify uses were to be represented by a one lane road (e.g. Wi-Fi, cellular, Ethernet, etc.) which cars (network packets) use to get to the destination, the Speedify protocol adds extra lanes, so that cars are distributed over all the lanes available.
When there’s a traffic event on one of the lanes, the cars on the other lanes will keep going without being dependent on the lane that’s stuck. If that lane remains stuck, the cars that have already been sent on it will be rerouted through the other lanes.
Speedify Features Beyond the Tunnel: Cellular Sharing, Failover, Prioritization and Bypass
Speedify also offers features beyond encryption and combining connections.
Peer to Peer Cellular Sharing: With Speedify’s cellular sharing feature, phones running Speedify on the same local network can share their 4G/5G cellular connection with your computer or another phone.
Intelligent Failover: When one connection drops, traffic moves to the others without breaking your apps’ sessions, and your public IP address stays the same, so calls, remote desktop and logged-in sessions carry on.
Traffic Prioritization: Speedify automatically prioritizes streams and video calls over other network traffic to reduce stuttering and buffering.
Bypass: In the past you had to disconnect from your VPN to watch Netflix, Disney Plus and other streaming services. With Speedify’s Bypass enabled, your online privacy is protected by the VPN tunnel while the streaming traffic can go around the VPN tunnel.
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Speedify combines Wi-Fi, 4G/5G cellular, Ethernet, Starlink and satellite into one faster, more reliable internet connection. Free to try: 5 GB a month with a free account. No credit card required.
🚀 Speed
Faster uploads and downloads, because Speedify uses all your internet connections at once.
📶 Stability
If one internet connection drops, Speedify moves your traffic to the others in milliseconds.
🔒 Security
AES-256 encryption on every internet connection, on any network you join.
15M+ downloads worldwide. 75K+ five-star reviews on iOS and Android.