The first thing that sets Lisk apart is its technology. As the company itself describes it, ‘Lisk is the first modular cryptocurrency utilizing sidechains’. What this means, basically, is that instead of using a public ledger to store all transactions, the Lisk network operates in modules. Developers and anyone else using the central/main network branches away to create a sidechain. By so doing, the main network remains unencumbered. Transactions will still be processed as usual on a sidechain as if you were using the main blockchain.
Such a design eliminates one fatal flaw in most cryptocurrencies, and that is bloat. If everyone uses the same blockchain, then it is bound to be slow in processing transactions. Therefore, Lisk promises to be faster all the time. Besides, it has also been built with scaling in mind, which is why it won’t suffer as bitcoin did.