BitGo Instant is a new option that uses a third-party key recovery service to allow bitcoin to be available immediately upon receipt, eliminating the need to wait minutes or hours for confirmations by using zero-confirmation transactions. This feature also allows for the prevention of double spend attacks. It should result in increased liquidity for users.
The service is free for transactions under 1 BTC, and carries a 0.1% sender’s fee for transactions over 1 BTC. BitGo Instant is currently being used by several prominent bitcoin businesses, including Bitfinex, Kraken, and Shapeshift, as well as fellow Boost VC alumni Fold, CoinHako, and Unocoin.
http://allcoinsnews.com/2016/03/07/bitquick-integrates-bitgo-instant-to-allow-instant-bitcoin-transfers/
