Kryll is a French crypto trading-automation brand run by Cryptense SAS of Paris 12. Its current product, KryllOS, is a free app that you install on your own computer or a rented server. In it you build trading strategies with a drag-and-drop editor, backtest them on historical data, paper-trade them and connect them to exchanges such as Binance, Coinbase and Hyperliquid 16. Kryll does not hold your funds or exchange API keys, and it charges no subscription or trading commission 13. The earlier hosted platform, Kryll³, has ended 1. KRL is the brand's ERC-20 token 5.