Openbook is a complete SaaS-based Accounting & Inventory Software that gives your customers the ability to create and manage businesses, invoices, estimates, customers, income , expenses , receiable, payable. we can create multiple businesses with different currencies so they can easily keep track of their businesses in one platform. Smart, simple online accounting software for small business Get the most efficient way to manage accounting & finance for modern businesses. Openbook is built with C#, .NET 7, Blazor Server.