Invoice and billing software is software for small businesses that automates invoicing and billing clients for your products or services. You can find invoicing and billing software geared specifically toward freelancers, sole proprietors, small businesses, mid-sized businesses, and global corporations.  Most bookkeeping and accounting software include features like invoicing and online payment acceptance. However, invoice-specific software might include more thorough customer collaboration and invoicing features than accounting software alone. Additionally, billing software often offers more payment acceptance options than standalone accounting software, which usually includes just one or two payment acceptance methods as a baseline. While most standalone billing and invoicing software costs an additional fee, that isn't true of most of our favorites, including Square, Zoho Invoice, and Wave Invoice.