Online term deposit marketplace Cashwerkz appears to be flourishing under the ownership of Trustees Australia, which reported yesterday that investments on the Cashwerkz platform had grown from A$1 billion at the end of October last year to $1.5 billion.Cashwerkz has added two new ADIs to its platform and it is preparing a new product offering: at-call deposits.Cashwerkz was launched in 2016, with an investment platform that allows institutional and retail investors to switch between term deposit providers without having to verify their identity each time they move their accounts.Trustees Australia acquired Cashwerkz in August 2017. Two established Trustees Australia businesses, fixed income brokerage Rim Securities and advisory service Redgate Asset Management, were bundled together with Cashwerkz following the merger.Since then Cashwerkz has been promoted as a one-stop shop for defensive assets. Once investors register they can choose from a range of TD offers from a number of providers, as well as bond and other fixed income investments.The Association of Independently Owned Financial Planners has endorsed Cashwerkz, adding it to its approved product list.In its latest market update, Trustees Australia reports that there are 40 ADIs on the Cashwerkz platform. The latest to join are Gateway Bank and Bank of Us.The at-call offering is planned for launch this year. Trustees Australia chief executive Hector Ortiz said in a statement: "The new product will change the way stockbrokers, institutions and advisers manage at-call money for their clients."