zkSync (by matter-labs.io ) is a trustless L2 scaling solution to enable mass adoption of public blockchains. The solution is a remedy for the growing problem of unreliable and expensive transactions on the Ethereum blockchain due to sky-high gas fees. zkSync can process more than 200 transactions per second, which is comparable to transaction volumes routinely processed by PayPal. The product has an upgradable nature and will be able to increase processing speed to be comparable with Visa over the next few months.