I think that it is very important for any business owner to save data about clients, suppliers, financial information, etc. For my translation agency, I use Protemos translation business management system for a translation company https://protemos.com/tms-for-translation-agencies.html
Protemos is an excellent project management and document storage software. There is a clear list of invoices with an indication of what is on time, what is overdue, a clear list of projects. With Protemos, excellent financial reporting and strong integration with CAT tools. Our agency data is safe here