Speedify is a bonding VPN that combines several internet connections into one. A computer, phone or tablet running Speedify can use Wi-Fi, 4G/5G cellular, Ethernet and satellite links at the same time. This lets one connection supply extra bandwidth while the others remain available if it fails. Speedify runs on Windows, macOS, Linux, iOS, iPadOS and Android, and a router edition runs on OpenWrt-based routers. A free account includes a monthly data limit. Paid individual, family, router and team plans remove that limit.
How bonded traffic reaches the internet
The Speedify client creates a virtual network interface on the device. The client encrypts each outgoing packet and sends it over one of the available connections. A Speedify server receives the packets from all of these links, puts them back in order and forwards the traffic to its destination. Replies come back over the same bonded links.
The split happens per packet, not per connection. A single large download, upload or video call can therefore use every link at once, where a conventional setup would keep one transfer on one connection. Faster, lower-latency links carry more of the traffic, and the balance shifts as their quality changes.
Because Speedify works at the network layer, browsers, games and conferencing tools need no configuration of their own.
Speed, Redundant and Local Load Balancer modes
The bonding mode decides how Speedify uses the links:
- Speed Mode spreads traffic across all active connections for maximum throughput.
- Redundant Mode sends duplicate copies of each packet over up to three connections and keeps whichever arrives first. This makes the connection more reliable, but throughput cannot exceed the fastest single link. Data and battery use also go up.
- Local Load Balancer spreads connections across interfaces on the device or router itself, without Speedify’s servers. It has no encryption, single-transfer bonding or seamless failover, so a failed link can interrupt a call using it.
Enhance Streaming for calls and live video
Enhance Streaming is on by default in Speed Mode, always active in Redundant Mode and unavailable with the Local Load Balancer. Speedify recognises streams by their ports, IP addresses, domain names and packet patterns. It also detects SRT broadcast streams automatically. These streams get priority over background traffic such as software updates. Speedify adds secondary links to support them and sends duplicate packets when the main link starts dropping data. A Livestream Test estimates which resolution and frame rate the bonded connection can sustain before going live.
Connection priorities and data limits
Users can set each connection to Automatic, Primary, Secondary, Backup or Never. Speedify uses Primary links first. Speedify adds Secondary links when more bandwidth is needed. Backup links carry traffic only when the others fail. Users can set per-connection data and rate limits to avoid overage charges. Real-time and historical statistics show how each link performs and how much Speedify has used it.
Failover without dropped sessions
When one link goes down, Speedify moves its traffic to the remaining connections within milliseconds. A call or transfer that has already started continues. Its session stays at the Speedify server rather than on the failed link. Ordinary switching between networks normally ends the session.
Encryption and protocol selection
Speedify encrypts all traffic between the device and the Speedify server. This keeps it hidden from other users on the same Wi-Fi network, internet providers and mobile carriers. Speedify uses AES-256 on hardware with AES acceleration and a ChaCha-based cipher on older devices. Speedify keeps no logs of visited websites, transferred data or DNS requests.
With the transport set to Auto, Speedify chooses a protocol for each link. It uses TCP on reliable links and parallel TCP sockets on lossy high-latency links. It uses UDP on unstable links and for real-time traffic, and HTTPS on guest networks that allow only web traffic. Captive Portal Assist keeps the connection secure while the user signs in to a network or accepts its terms and conditions.
Pair & Share cellular pooling
Pair & Share lets Speedify users on the same Wi-Fi or Ethernet network pool their cellular connections. Each user opts in, and the devices find each other on the local network. That network must not block mDNS traffic. Each device accepts a pairing offer before its connection is shared. Shared links then work as if they were built into the receiving device, and sharing works in both directions at once. Travelers on a train, for example, can pool cellular connections from different carriers to stay online through tunnels and remote areas. Data shared this way counts as tethering on the mobile plan.
Plans, routers and servers
The free tier has the same core features as the paid plans. Individual plans cover up to five devices. Family plans cover up to four family members with up to five devices each. Paid plans also add premium servers in more than 50 locations. Speedify for Routers bonds connections for every device on a home or site network without installing the app on each one. Speedify for Teams serves businesses. Dedicated servers with a static IP address and port forwarding are available as an add-on. Speedify also supports self-hosted servers.
