NITROSPHERE improves reliability. WAN accelerators use false acknowledgements that can cause instability. NitroAccelerator achieves its performance gains without the use of false acks.
NITROSPHERE costs less. WAN accelerators can be very expensive with initial costs between two locations at over $30K just for the hardware. Large enterprises can easily spend millions of dollars on WAN accelerators, whereas NITROSPHERE customers can deploy complete solutions for less than $10K.
NITROSPHERE is more secure. While WAN accelerators can encrypt traffic between locations, in order to implement end-to-end encryption, they require that you provide the encryption keys for applications you want to accelerate. This means that the appliance first decrypts the data, then operates on it, then re-encrypts it. This is not end-to-end encryption. Hardware accelerators also increase the attack surface for hackers by caching your corporate data to disks on the device, meaning that if the appliance is breached, so is your enterprise. NITROSPHERE is the only true end-to-end encryption and acceleration provider.